<?xml version='1.0' encoding='UTF-8'?>

      <!-- iXBRL document created with: Toppan Merrill Bridge iXBRL 9.6.7908.23199 -->
      <!-- Based on: iXBRL 1.1 -->
      <!-- Created on: 10/27/2021 8:14:50 PM -->
      <!-- iXBRL Library version: 1.0.7908.23207 -->
      <!-- iXBRL Service Job ID: 4247402b-360d-4b14-b318-01aca7272d87 -->

  <html xmlns:dei="http://xbrl.sec.gov/dei/2021" xmlns="http://www.w3.org/1999/xhtml" xmlns:link="http://www.xbrl.org/2003/linkbase" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xbrldt="http://xbrl.org/2005/xbrldt" xmlns:xs="http://www.w3.org/2001/XMLSchema-instance" xmlns:ixt-sec="http://www.sec.gov/inlineXBRL/transformation/2015-08-31" xmlns:fix="http://www.comfortsystemsusa.com/20211027" xmlns:ixt="http://www.xbrl.org/inlineXBRL/transformation/2015-02-26" xmlns:ix="http://www.xbrl.org/2013/inlineXBRL" xmlns:ref="http://www.xbrl.org/2006/ref" xmlns:xbrli="http://www.xbrl.org/2003/instance"><head><meta http-equiv="content-type" content="text/html" /><title></title></head><body><div style="margin-top:30pt;"></div><div style="display:none;"><ix:header><ix:hidden><ix:nonNumeric contextRef="Duration_10_27_2021_To_10_27_2021_ZYyI0nemEEm8W6xL9B0HoQ" name="dei:EntityCentralIndexKey" id="Tc_JxqykWsnIUShrP_eXxfY5Q_2_1">0001035983</ix:nonNumeric><ix:nonNumeric contextRef="Duration_10_27_2021_To_10_27_2021_ZYyI0nemEEm8W6xL9B0HoQ" name="dei:AmendmentFlag" id="Tc_D5Tvw43oAE-5ub63JHoE2g_3_1">false</ix:nonNumeric></ix:hidden><ix:references><link:schemaRef xlink:href="fix-20211027.xsd" xlink:type="simple"></link:schemaRef></ix:references><ix:resources><xbrli:context id="Duration_10_27_2021_To_10_27_2021_ZYyI0nemEEm8W6xL9B0HoQ"><xbrli:entity><xbrli:identifier scheme="http://www.sec.gov/CIK">0001035983</xbrli:identifier></xbrli:entity><xbrli:period><xbrli:startDate>2021-10-27</xbrli:startDate><xbrli:endDate>2021-10-27</xbrli:endDate></xbrli:period></xbrli:context></ix:resources></ix:header></div><div style="max-width:100%;padding-left:10.35%;padding-right:10.35%;position:relative;"><div style="clear:both;max-width:100%;position:relative;"><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;line-height:1.19;padding-bottom:1pt;padding-top:1pt;border-bottom:1.0pt solid #000000;border-top:3.0pt solid #000000;margin:0pt;"><span style="font-size:1pt;visibility:hidden;">&#8203;</span></p><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;line-height:1.19;text-align:center;margin:0pt;"><span style="font-size:6pt;visibility:hidden;">&#8203;</span></p><a id="_87c0f769_7638_41e1_bd15_a253f281400f"></a><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;line-height:1.19;text-align:center;margin:0pt;"><b style="font-size:18pt;font-weight:bold;">UNITED STATES<br />SECURITIES AND EXCHANGE COMMISSION</b></p><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;line-height:1.19;text-align:center;margin:0pt;"><b style="font-weight:bold;">Washington, D.C. 20549</b></p><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;line-height:1.19;text-align:center;margin:0pt;"><span style="visibility:hidden;">&#8203;</span></p><p style="font-family:'Times New Roman','Times','serif';font-size:18pt;line-height:1.19;text-align:center;margin:0pt;"><b style="font-weight:bold;">FORM&#160;</b><ix:nonNumeric contextRef="Duration_10_27_2021_To_10_27_2021_ZYyI0nemEEm8W6xL9B0HoQ" name="dei:DocumentType" id="Narr_nkbCGs-mdkuNJ3CA_k7_PQ"><b style="font-weight:bold;">8-K</b></ix:nonNumeric></p><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;line-height:1.19;text-align:center;margin:0pt;"><span style="visibility:hidden;">&#8203;</span></p><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;line-height:1.19;text-align:center;margin:0pt;"><b style="font-size:12pt;font-weight:bold;">CURRENT REPORT</b></p><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;line-height:1.19;text-align:center;margin:0pt;"><b style="font-size:12pt;font-weight:bold;">Pursuant to Section&#160;13 OR 15(d)&#160;of The Securities Exchange Act of 1934</b></p><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;line-height:1.19;text-align:center;margin:0pt;"><span style="visibility:hidden;">&#8203;</span></p><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;line-height:1.19;text-align:center;margin:0pt;">Date of Report (Date of earliest event reported) <ix:nonNumeric contextRef="Duration_10_27_2021_To_10_27_2021_ZYyI0nemEEm8W6xL9B0HoQ" format="ixt:datemonthdayyearen" name="dei:DocumentPeriodEndDate" id="Narr_nZozK6xKU0q6g0f_gwobfA"><b style="font-weight:bold;">October 27, 2021</b></ix:nonNumeric></p><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;line-height:1.19;text-align:center;margin:0pt;"><span style="visibility:hidden;">&#8203;</span></p><p style="font-family:'Times New Roman','Times','serif';font-size:18pt;line-height:1.19;text-align:center;margin:0pt;"><ix:nonNumeric contextRef="Duration_10_27_2021_To_10_27_2021_ZYyI0nemEEm8W6xL9B0HoQ" name="dei:EntityRegistrantName" id="Narr_CDbRjltS_km9wQxDLWdNtg"><b style="font-weight:bold;">Comfort Systems USA, Inc.</b></ix:nonNumeric></p><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;line-height:1.19;text-align:center;margin:0pt;">(Exact name of registrant as specified in its charter)</p><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;line-height:1.19;text-align:center;margin:0pt;"><span style="visibility:hidden;">&#8203;</span></p><a id="_7aa6630b_400b_4025_bd05_a2ff8f1da26a"></a><a id="Tc_XSGnt5Hjz0qN4lRA8axsJw_2_0"></a><a id="Tc_-wIYW71XFUOYKPsBeh1kQQ_2_2"></a><a id="Tc_4IyKHTOAmEmUcywQY_FTFA_2_4"></a><a id="Tc_KSYmedPp4EK2y_4ZDQoCDw_3_0"></a><a id="Tc_R0KtEkEEvUiHjBb73Uedkg_3_2"></a><a id="Tc_UB--x48kCkenR4KVjkz4Hw_3_4"></a><table style="border-collapse:collapse;font-size:16pt;height:max-content;margin-left:auto;margin-right:auto;padding-left:0pt;padding-right:0pt;width:100%;"><tr style="height:1pt;"><td style="vertical-align:bottom;width:32%;margin:0pt;padding:0pt;"><div style="height:1pt;overflow:hidden;overflow-wrap:break-word;position:relative;"><div style="bottom:0pt;position:absolute;width:100%;"><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;line-height:1.19;margin:0pt;"><span style="font-size:1pt;visibility:hidden;">&#8203;</span></p></div></div></td><td style="vertical-align:bottom;width:2.44%;margin:0pt;padding:0pt;"><div style="height:1pt;overflow:hidden;overflow-wrap:break-word;position:relative;"><div style="bottom:0pt;position:absolute;width:100%;"><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;line-height:1.19;margin:0pt;"><span style="font-size:1pt;visibility:hidden;">&#8203;</span></p></div></div></td><td style="vertical-align:bottom;width:31.55%;margin:0pt;padding:0pt;"><div style="height:1pt;overflow:hidden;overflow-wrap:break-word;position:relative;"><div style="bottom:0pt;position:absolute;width:100%;"><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;line-height:1.19;margin:0pt;"><span style="font-size:1pt;visibility:hidden;">&#8203;</span></p></div></div></td><td style="vertical-align:bottom;width:2.42%;margin:0pt;padding:0pt;"><div style="height:1pt;overflow:hidden;overflow-wrap:break-word;position:relative;"><div style="bottom:0pt;position:absolute;width:100%;"><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;line-height:1.19;margin:0pt;"><span style="font-size:1pt;visibility:hidden;">&#8203;</span></p></div></div></td><td style="vertical-align:bottom;width:31.57%;margin:0pt;padding:0pt;"><div style="height:1pt;overflow:hidden;overflow-wrap:break-word;position:relative;"><div style="bottom:0pt;position:absolute;width:100%;"><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;line-height:1.19;margin:0pt;"><span style="font-size:1pt;visibility:hidden;">&#8203;</span></p></div></div></td></tr><tr><td style="vertical-align:bottom;width:32%;margin:0pt;padding:0pt;"><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;line-height:1.19;text-align:center;margin:0pt;"><ix:nonNumeric contextRef="Duration_10_27_2021_To_10_27_2021_ZYyI0nemEEm8W6xL9B0HoQ" format="ixt-sec:stateprovnameen" name="dei:EntityIncorporationStateCountryCode" id="Tc_c-eIvv-m_keUg32XfLCJoQ_1_0"><b style="font-weight:bold;">Delaware</b></ix:nonNumeric></p></td><td style="vertical-align:bottom;width:2.44%;margin:0pt;padding:0pt;"><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;line-height:1.19;margin:0pt;">&#160;&#160;&#160;&#160;</p></td><td style="vertical-align:bottom;width:31.55%;margin:0pt;padding:0pt;"><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;line-height:1.19;text-align:center;margin:0pt;"><ix:nonNumeric contextRef="Duration_10_27_2021_To_10_27_2021_ZYyI0nemEEm8W6xL9B0HoQ" name="dei:EntityFileNumber" id="Tc_7_nXZJL6lkGkDsvMzNyKKQ_1_2"><b style="font-weight:bold;">1-13011</b></ix:nonNumeric></p></td><td style="vertical-align:bottom;width:2.42%;margin:0pt;padding:0pt;"><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;line-height:1.19;margin:0pt;">&#160;&#160;&#160;&#160;</p></td><td style="vertical-align:bottom;width:31.57%;margin:0pt;padding:0pt;"><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;line-height:1.19;text-align:center;margin:0pt;"><ix:nonNumeric contextRef="Duration_10_27_2021_To_10_27_2021_ZYyI0nemEEm8W6xL9B0HoQ" name="dei:EntityTaxIdentificationNumber" id="Tc_n2OIxdpXq0ygVAyoRiQVBg_1_4"><b style="font-weight:bold;">76-0526487</b></ix:nonNumeric></p></td></tr><tr><td style="vertical-align:bottom;width:32%;margin:0pt;padding:0pt;"><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;line-height:1.19;text-align:center;margin:0pt;">(State or other jurisdiction</p></td><td style="vertical-align:bottom;width:2.44%;margin:0pt;padding:0pt;"><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;line-height:1.19;margin:0pt;"><span style="visibility:hidden;">&#8203;</span></p></td><td style="vertical-align:bottom;width:31.55%;margin:0pt;padding:0pt;"><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;line-height:1.19;text-align:center;margin:0pt;">(Commission</p></td><td style="vertical-align:bottom;width:2.42%;margin:0pt;padding:0pt;"><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;line-height:1.19;margin:0pt;"><span style="visibility:hidden;">&#8203;</span></p></td><td style="vertical-align:bottom;width:31.57%;margin:0pt;padding:0pt;"><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;line-height:1.19;text-align:center;margin:0pt;">(IRS Employer</p></td></tr><tr><td style="vertical-align:bottom;width:32%;margin:0pt;padding:0pt;"><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;line-height:1.19;text-align:center;margin:0pt;">of incorporation)</p></td><td style="vertical-align:bottom;width:2.44%;margin:0pt;padding:0pt;"><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;line-height:1.19;margin:0pt;"><span style="visibility:hidden;">&#8203;</span></p></td><td style="vertical-align:bottom;width:31.55%;margin:0pt;padding:0pt;"><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;line-height:1.19;text-align:center;margin:0pt;">File Number)</p></td><td style="vertical-align:bottom;width:2.42%;margin:0pt;padding:0pt;"><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;line-height:1.19;margin:0pt;"><span style="visibility:hidden;">&#8203;</span></p></td><td style="vertical-align:bottom;width:31.57%;margin:0pt;padding:0pt;"><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;line-height:1.19;text-align:center;margin:0pt;">Identification No.)</p></td></tr></table><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;line-height:1.19;text-align:center;margin:0pt;"><span style="visibility:hidden;">&#8203;</span></p><a id="_65bb7221_2ce5_4e8b_82dc_24f2fb7f2b47"></a><a id="Tc_Dq7gs5No2kKl90pcNwoIPQ_2_0"></a><a id="Tc_ZiPp899ks0OZazIlPqs3tQ_3_0"></a><a id="Tc_mWQHtxXf40S3hIIWq3Do_w_3_2"></a><table style="border-collapse:collapse;font-size:16pt;height:max-content;margin-left:auto;margin-right:auto;padding-left:0pt;padding-right:0pt;width:100%;"><tr style="height:1pt;"><td style="vertical-align:bottom;width:49.43%;margin:0pt;padding:0pt;"><div style="height:1pt;overflow:hidden;overflow-wrap:break-word;position:relative;"><div style="bottom:0pt;position:absolute;width:100%;"><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;line-height:1.19;margin:0pt;"><span style="font-size:1pt;visibility:hidden;">&#8203;</span></p></div></div></td><td style="vertical-align:bottom;width:2.78%;margin:0pt;padding:0pt;"><div style="height:1pt;overflow:hidden;overflow-wrap:break-word;position:relative;"><div style="bottom:0pt;position:absolute;width:100%;"><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;line-height:1.19;margin:0pt;"><span style="font-size:1pt;visibility:hidden;">&#8203;</span></p></div></div></td><td style="vertical-align:bottom;width:47.78%;margin:0pt;padding:0pt;"><div style="height:1pt;overflow:hidden;overflow-wrap:break-word;position:relative;"><div style="bottom:0pt;position:absolute;width:100%;"><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;line-height:1.19;margin:0pt;"><span style="font-size:1pt;visibility:hidden;">&#8203;</span></p></div></div></td></tr><tr><td style="vertical-align:bottom;width:49.43%;margin:0pt;padding:0pt;"><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;line-height:1.19;text-align:center;margin:0pt;"><ix:nonNumeric contextRef="Duration_10_27_2021_To_10_27_2021_ZYyI0nemEEm8W6xL9B0HoQ" name="dei:EntityAddressAddressLine1" id="Tc_Lg3ZTRyMwkugROeyc2tJHA_1_0"><b style="font-weight:bold;">675 Bering Drive, Suite 400</b></ix:nonNumeric></p></td><td style="vertical-align:bottom;width:2.78%;margin:0pt;padding:0pt;"><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;line-height:1.19;margin:0pt;">&#160;&#160;&#160;&#160;</p></td><td style="vertical-align:bottom;width:47.78%;margin:0pt;padding:0pt;"><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;line-height:1.19;text-align:center;margin:0pt;"><span style="visibility:hidden;">&#8203;</span></p></td></tr><tr><td style="vertical-align:bottom;width:49.43%;margin:0pt;padding:0pt;"><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;line-height:1.19;text-align:center;margin:0pt;"><ix:nonNumeric contextRef="Duration_10_27_2021_To_10_27_2021_ZYyI0nemEEm8W6xL9B0HoQ" name="dei:EntityAddressCityOrTown" id="Narr_CPFTcJhpO0KsjnZ5ZJVwFA"><b style="font-weight:bold;">Houston</b></ix:nonNumeric><b style="font-weight:bold;">, </b><ix:nonNumeric contextRef="Duration_10_27_2021_To_10_27_2021_ZYyI0nemEEm8W6xL9B0HoQ" format="ixt-sec:stateprovnameen" name="dei:EntityAddressStateOrProvince" id="Narr_ICo5jSshnUCrkpiqxmpPLg"><b style="font-weight:bold;">Texas</b></ix:nonNumeric></p></td><td style="vertical-align:bottom;width:2.78%;margin:0pt;padding:0pt;"><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;line-height:1.19;margin:0pt;"><span style="visibility:hidden;">&#8203;</span></p></td><td style="vertical-align:bottom;width:47.78%;margin:0pt;padding:0pt;"><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;line-height:1.19;text-align:center;margin:0pt;"><ix:nonNumeric contextRef="Duration_10_27_2021_To_10_27_2021_ZYyI0nemEEm8W6xL9B0HoQ" name="dei:EntityAddressPostalZipCode" id="Tc_nA-3gUs8nUKrr7_rQG2hiw_2_2"><b style="font-weight:bold;">77057</b></ix:nonNumeric></p></td></tr><tr><td style="vertical-align:bottom;width:49.43%;margin:0pt;padding:0pt;"><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;line-height:1.19;text-align:center;margin:0pt;">(Address of principal executive offices)</p></td><td style="vertical-align:bottom;width:2.78%;margin:0pt;padding:0pt;"><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;line-height:1.19;margin:0pt;"><span style="visibility:hidden;">&#8203;</span></p></td><td style="vertical-align:bottom;width:47.78%;margin:0pt;padding:0pt;"><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;line-height:1.19;text-align:center;margin:0pt;">(Zip Code)</p></td></tr></table><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;line-height:1.19;margin:0pt;"><span style="visibility:hidden;">&#8203;</span></p><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;line-height:1.19;text-align:center;margin:0pt 0pt 0pt 5.4pt;">Registrant&#8217;s telephone number, including area code <b style="font-weight:bold;">(</b><ix:nonNumeric contextRef="Duration_10_27_2021_To_10_27_2021_ZYyI0nemEEm8W6xL9B0HoQ" name="dei:CityAreaCode" id="Narr__gX8Kfu5_kOAJeJmN8KaTw"><b style="font-weight:bold;">713</b></ix:nonNumeric><b style="font-weight:bold;">) </b><ix:nonNumeric contextRef="Duration_10_27_2021_To_10_27_2021_ZYyI0nemEEm8W6xL9B0HoQ" name="dei:LocalPhoneNumber" id="Narr_OddjPFpG3Uu0mmqOkINo5A"><b style="font-weight:bold;">830-9600</b></ix:nonNumeric></p><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;line-height:1.19;text-align:center;margin:0pt 0pt 0pt 5.4pt;"><span style="margin-left:0pt;visibility:hidden;">&#8203;</span></p><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;line-height:1.19;text-align:center;margin:0pt 0pt 0pt 5.4pt;">(Former name or former address, if changed since last report.)</p><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;line-height:1.19;text-align:center;margin:0pt;"><span style="visibility:hidden;">&#8203;</span></p><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;line-height:1.19;margin:0pt;">Check the appropriate box below if the Form&#160;8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:</p><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;line-height:1.19;margin:0pt;"><span style="visibility:hidden;">&#8203;</span></p><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;line-height:1.19;padding-left:18pt;text-indent:-18pt;margin:0pt;"><ix:nonNumeric contextRef="Duration_10_27_2021_To_10_27_2021_ZYyI0nemEEm8W6xL9B0HoQ" format="ixt-sec:boolballotbox" name="dei:WrittenCommunications" id="Narr_mIM_r-AxVEOiylz5mDKgJw"><span style="font-family:'Segoe UI Symbol';">&#9744;</span></ix:nonNumeric>&#160;Written communications pursuant to Rule&#160;425 under the Securities Act (17 CFR 230.425)&#160;</p><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;line-height:1.19;padding-left:18pt;text-indent:-18pt;margin:0pt;"><ix:nonNumeric contextRef="Duration_10_27_2021_To_10_27_2021_ZYyI0nemEEm8W6xL9B0HoQ" format="ixt-sec:boolballotbox" name="dei:SolicitingMaterial" id="Narr_TcEut4MLxkyNZ9Ry_nTwCw"><span style="font-family:'Segoe UI Symbol';">&#9744;</span></ix:nonNumeric>&#160;Soliciting material pursuant to Rule&#160;14a-12 under the Exchange Act (17 CFR 240.14a-12)</p><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;line-height:1.19;padding-left:18pt;text-indent:-18pt;margin:0pt;"><ix:nonNumeric contextRef="Duration_10_27_2021_To_10_27_2021_ZYyI0nemEEm8W6xL9B0HoQ" format="ixt-sec:boolballotbox" name="dei:PreCommencementTenderOffer" id="Narr_N4JPgRvAiUu3TWpFhMsDrg"><span style="font-family:'Segoe UI Symbol';">&#9744;</span></ix:nonNumeric>&#160;Pre-commencement communications pursuant to Rule&#160;14d-2(b)&#160;under the Exchange Act (17 CFR 240.14d-2(b))</p><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;line-height:1.19;padding-left:18pt;text-indent:-18pt;margin:0pt;"><ix:nonNumeric contextRef="Duration_10_27_2021_To_10_27_2021_ZYyI0nemEEm8W6xL9B0HoQ" format="ixt-sec:boolballotbox" name="dei:PreCommencementIssuerTenderOffer" id="Narr_ZXBpvy0epUOUakoq_5GtZA"><span style="font-family:'Segoe UI Symbol';">&#9744;</span></ix:nonNumeric>&#160;Pre-commencement communications pursuant to Rule&#160;13e-4(c)&#160;under the Exchange Act (17 CFR 240.13e-4(c))</p><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;line-height:1.19;margin:0pt;"><span style="visibility:hidden;">&#8203;</span></p><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;line-height:1.43;text-indent:13.5pt;margin:0pt 0pt 5pt -13.5pt;">Securities registered pursuant to Section 12(b) of the Act:</p><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;line-height:1.19;text-align:center;margin:0pt;"><span style="font-size:8pt;visibility:hidden;">&#8203;</span></p><a id="_9df19235_2110_4d2d_84c8_586a1754b15b"></a><div style="margin-left:0pt;"><a id="Tc_MDwdU6BSAk-P00vrOxbj0w_1_0"></a><a id="Tc_Nj7g7ZsyJUWa-PNIuMwrjA_1_1"></a><a id="Tc_Mw2pFfnphE-HN0AxzRbcQQ_1_2"></a><table style="border-collapse:collapse;font-size:16pt;height:max-content;width:98.66%;"><tr style="height:1pt;"><td style="vertical-align:top;width:33.08%;margin:0pt;padding:0pt 5.4pt 0pt 5.4pt;"><div style="height:1pt;overflow:hidden;overflow-wrap:break-word;position:relative;"><div style="position:absolute;top:0pt;width:100%;"></div></div></td><td style="vertical-align:top;width:25.37%;margin:0pt;padding:0pt 5.4pt 0pt 5.4pt;"><div style="height:1pt;overflow:hidden;overflow-wrap:break-word;position:relative;"><div style="position:absolute;top:0pt;width:100%;"></div></div></td><td style="vertical-align:top;width:41.54%;margin:0pt;padding:0pt 5.4pt 0pt 5.4pt;"><div style="height:1pt;overflow:hidden;overflow-wrap:break-word;position:relative;"><div style="position:absolute;top:0pt;width:100%;"></div></div></td></tr><tr><td style="vertical-align:top;width:33.08%;margin:0pt;padding:0pt 5.4pt 0pt 5.4pt;"><p style="font-family:'Times New Roman','Times','serif';font-size:9pt;line-height:1.19;padding-bottom:1pt;text-align:center;border-bottom:1px solid #000000;margin:0pt;"><b style="font-weight:bold;">Title of each class</b></p></td><td style="vertical-align:top;width:25.37%;margin:0pt;padding:0pt 5.4pt 0pt 5.4pt;"><p style="font-family:'Times New Roman','Times','serif';font-size:9pt;line-height:1.19;padding-bottom:1pt;text-align:center;border-bottom:1px solid #000000;margin:0pt;"><b style="font-weight:bold;">Trading Symbol(s)</b></p></td><td style="vertical-align:top;width:41.54%;margin:0pt;padding:0pt 5.4pt 0pt 5.4pt;"><p style="font-family:'Times New Roman','Times','serif';font-size:9pt;line-height:1.19;padding-bottom:1pt;text-align:center;border-bottom:1px solid #000000;margin:0pt;"><b style="font-weight:bold;">Name of each exchange on which registered</b></p></td></tr><tr><td style="vertical-align:top;width:33.08%;margin:0pt;padding:0pt 5.4pt 0pt 5.4pt;"><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;line-height:1.43;text-align:center;margin:2pt 0pt 0pt 0pt;"><ix:nonNumeric contextRef="Duration_10_27_2021_To_10_27_2021_ZYyI0nemEEm8W6xL9B0HoQ" name="dei:Security12bTitle" id="Tc_G1nzW9IlDkWIxDuqtV7TCQ_2_0">Common Stock, $0.01 par value</ix:nonNumeric></p></td><td style="vertical-align:top;width:25.37%;margin:0pt;padding:0pt 5.4pt 0pt 5.4pt;"><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;line-height:1.43;text-align:center;margin:2pt 0pt 0pt 0pt;"><ix:nonNumeric contextRef="Duration_10_27_2021_To_10_27_2021_ZYyI0nemEEm8W6xL9B0HoQ" name="dei:TradingSymbol" id="Tc_8AKD3eKfR0CkbCEslLAckQ_2_1">FIX</ix:nonNumeric></p></td><td style="vertical-align:top;width:41.54%;margin:0pt;padding:0pt 5.4pt 0pt 5.4pt;"><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;line-height:1.43;text-align:center;margin:2pt 0pt 0pt 0pt;"><ix:nonNumeric contextRef="Duration_10_27_2021_To_10_27_2021_ZYyI0nemEEm8W6xL9B0HoQ" format="ixt-sec:exchnameen" name="dei:SecurityExchangeName" id="Tc_xzoEqzSszUSy3MWUw3RriA_2_2">New York Stock Exchange</ix:nonNumeric></p></td></tr></table></div><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;line-height:1.19;margin:0pt;"><span style="visibility:hidden;">&#8203;</span></p><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;line-height:1.19;margin:0pt;">Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (&#167;230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (&#167;240.12b-2 of this chapter).</p><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;line-height:1.19;margin:0pt;"><span style="visibility:hidden;">&#8203;</span></p><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;line-height:1.19;margin:0pt;">Emerging growth company <ix:nonNumeric contextRef="Duration_10_27_2021_To_10_27_2021_ZYyI0nemEEm8W6xL9B0HoQ" format="ixt-sec:boolballotbox" name="dei:EntityEmergingGrowthCompany" id="Narr_XyX9CKgjVEaH5lcxbF29sg"><span style="font-family:'Segoe UI Symbol';">&#9744;</span></ix:nonNumeric></p><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;line-height:1.19;margin:0pt;"><span style="visibility:hidden;">&#8203;</span></p><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;line-height:1.19;margin:0pt;">If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. <span style="font-family:'Segoe UI Symbol';">&#9744;</span></p><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;line-height:1.19;margin:0pt;"><span style="font-size:6pt;visibility:hidden;">&#8203;</span></p><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;line-height:1.19;padding-bottom:1pt;padding-top:1pt;border-bottom:3.0pt solid #000000;border-top:1.0pt solid #000000;margin:0pt;"><span style="font-size:1pt;visibility:hidden;">&#8203;</span></p><p style="display:none;font-family:'Times New Roman','Times','serif';font-size:10pt;line-height:0pt;margin:0pt;"><span style="font-size:0pt;line-height:1.19;visibility:hidden;">&#8203;</span></p></div></div>
<div style="background-color:#000000;clear:both;height:2pt;page-break-after:always;width:79.3%;border:0;margin:30pt 10.35% 30pt 10.35%;"></div><div style="max-width:100%;padding-left:10.29%;padding-right:10.29%;position:relative;"><div style="clear:both;max-width:100%;position:relative;"><a id="_9a703ed2_0763_48b0_9125_fae335f6a03a"></a><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;line-height:1.19;margin:0pt;"><b style="font-weight:bold;">ITEM 2.02</b>&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;<b style="font-weight:bold;">Results of Operations and Financial Condition</b></p><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;line-height:1.19;margin:0pt;"><span style="visibility:hidden;">&#8203;</span></p><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;line-height:1.19;text-indent:36pt;margin:0pt;">Attached and incorporated herein by reference as Exhibit 99.1 is a copy of a press release of Comfort Systems USA, Inc. (the &#8220;Company&#8221;) dated October 27, 2021 reporting the Company&#8217;s financial results for the third quarter of 2021.</p><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;line-height:1.19;margin:0pt;"><span style="visibility:hidden;">&#8203;</span></p><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;line-height:1.19;text-indent:37pt;margin:0pt;">The above information and attached press release are being furnished pursuant to Item 2.02 of Form&#160;8-K and General Instruction B.2 thereunder. The information included herein and in the attached press release shall not be deemed &#8220;filed&#8221; for purposes of Section&#160;18 of the Securities Exchange Act of 1934, as amended, or otherwise subject to the liabilities of that section, nor shall it be deemed incorporated by reference in any filing under the Securities Act of 1933, as amended.</p><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;line-height:1.19;margin:0pt;"><span style="visibility:hidden;">&#8203;</span></p><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;line-height:1.19;margin:0pt;"><b style="font-weight:bold;">ITEM 8.01</b>&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;<b style="font-weight:bold;">Other Events</b></p><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;line-height:1.19;margin:0pt;"><span style="visibility:hidden;">&#8203;</span></p><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;line-height:1.19;text-indent:36pt;margin:0pt;">Attached and incorporated herein by reference as Exhibit&#160;99.2 is a copy of a press release of the Company dated October 27, 2021 reporting the Company&#8217;s declaration of a quarterly dividend on the Company&#8217;s common stock to stockholders of record as of the close of business on the record date, November&#160;12, 2021.</p><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;line-height:1.19;margin:0pt;"><span style="visibility:hidden;">&#8203;</span></p><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;line-height:1.19;margin:0pt;"><b style="font-weight:bold;">ITEM 9.01</b>&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;<b style="font-weight:bold;">Financial Statements and Exhibits</b></p><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;line-height:1.19;margin:0pt;"><span style="visibility:hidden;">&#8203;</span></p><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;line-height:1.19;margin:0pt;"><span style="white-space:pre-wrap;">(d)  The following Exhibits are included herein:</span></p><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;line-height:1.19;margin:0pt;"><span style="visibility:hidden;">&#8203;</span></p><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;line-height:1.19;text-indent:36pt;margin:0pt;">Exhibit&#160;99.1 Press Release of Comfort Systems USA,&#160;Inc. dated October 27, 2021 reporting the Company&#8217;s financial results for the third quarter of 2021.</p><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;line-height:1.19;margin:0pt;"><span style="visibility:hidden;">&#8203;</span></p><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;line-height:1.19;text-indent:36pt;margin:0pt;">Exhibit&#160;99.2 Press Release of Comfort Systems USA,&#160;Inc. dated October 27, 2021 reporting the Company&#8217;s declaration of a quarterly dividend on the Company&#8217;s common stock to stockholders of record as of the close of business on the record date, November 12, 2021.</p><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;line-height:1.37;margin:0pt 0pt 10pt 0pt;"><span style="font-weight:bold;line-height:1.19;margin-bottom:0pt;text-decoration:underline;visibility:hidden;">&#8203;</span></p></div><div style="clear:both;margin-bottom:30pt;width:100%;"><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;line-height:1.19;text-align:center;margin:24pt 0pt 0pt 0pt;">2</p></div></div>
<div style="background-color:#000000;clear:both;height:2pt;page-break-after:always;width:79.41%;border:0;margin:30pt 10.29% 30pt 10.29%;"></div><div style="max-width:100%;padding-left:10.29%;padding-right:10.29%;position:relative;"><div style="clear:both;max-width:100%;position:relative;"><a id="_e4efe785_bb65_4ded_ae99_0bded1f940e8"></a><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;line-height:1.19;text-align:center;margin:0pt;"><b style="font-weight:bold;text-decoration:underline;text-decoration-color:#000000;">EXHIBIT&#160;INDEX</b></p><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;line-height:1.19;margin:0pt;"><span style="visibility:hidden;">&#8203;</span></p><table style="border-collapse:collapse;font-size:16pt;height:max-content;padding-left:0pt;padding-right:0pt;table-layout:auto;width:100%;"><tr style="height:1pt;"><td style="vertical-align:bottom;width:7.22%;margin:0pt;padding:0pt;"><div style="height:1pt;overflow:hidden;overflow-wrap:break-word;position:relative;"><div style="bottom:0pt;position:absolute;width:100%;"><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;line-height:1.19;margin:0pt;"><span style="font-size:1pt;visibility:hidden;">&#8203;</span></p></div></div></td><td style="vertical-align:bottom;width:2.22%;margin:0pt;padding:0pt;"><div style="height:1pt;overflow:hidden;overflow-wrap:break-word;position:relative;"><div style="bottom:0pt;position:absolute;width:100%;"><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;line-height:1.19;margin:0pt;"><span style="font-size:1pt;visibility:hidden;">&#8203;</span></p></div></div></td><td style="vertical-align:bottom;width:90.55%;margin:0pt;padding:0pt;"><div style="height:1pt;overflow:hidden;overflow-wrap:break-word;position:relative;"><div style="bottom:0pt;position:absolute;width:100%;"><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;line-height:1.19;margin:0pt;"><span style="font-size:1pt;visibility:hidden;">&#8203;</span></p></div></div></td></tr><tr><td style="vertical-align:bottom;width:7.22%;border-bottom:1px solid #000000;margin:0pt;padding:0pt;"><p style="font-family:'Times New Roman','Times','serif';font-size:8pt;line-height:1.19;margin:0pt;"><b style="font-weight:bold;">Exhibit<br />Number</b></p></td><td style="vertical-align:bottom;width:2.22%;border-bottom:1px solid transparent;margin:0pt;padding:0pt;"><p style="font-family:'Times New Roman','Times','serif';font-size:8pt;line-height:1.19;margin:0pt;"><b style="font-weight:bold;">&#160;&#160;&#160;&#160;</b></p></td><td style="vertical-align:bottom;width:90.55%;border-bottom:1px solid #000000;margin:0pt;padding:0pt;"><p style="font-family:'Times New Roman','Times','serif';font-size:8pt;line-height:1.19;text-align:center;margin:0pt;"><b style="font-weight:bold;">Exhibit&#160;Title&#160;or&#160;Description</b></p></td></tr><tr><td style="vertical-align:top;width:7.22%;margin:0pt;padding:0pt;"><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;line-height:1.19;margin:0pt 0pt 0pt 10.8pt;"><span style="margin-left:0pt;visibility:hidden;">&#8203;</span></p></td><td style="vertical-align:bottom;width:2.22%;margin:0pt;padding:0pt;"><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;line-height:1.19;margin:0pt;"><span style="visibility:hidden;">&#8203;</span></p></td><td style="vertical-align:top;width:90.55%;margin:0pt;padding:0pt;"><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;line-height:1.19;margin:0pt;"><span style="visibility:hidden;">&#8203;</span></p></td></tr><tr><td style="vertical-align:top;width:7.22%;margin:0pt;padding:0pt;"><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;line-height:1.19;margin:0pt 0pt 0pt 10.8pt;">99.1</p></td><td style="vertical-align:bottom;width:2.22%;margin:0pt;padding:0pt;"><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;line-height:1.19;margin:0pt;"><span style="visibility:hidden;">&#8203;</span></p></td><td style="vertical-align:top;width:90.55%;margin:0pt;padding:0pt;"><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;line-height:1.19;margin:0pt;"><a style="-sec-extract:exhibit;" href="fix-20211027xex99d1.htm"><span style="font-family:'Times New Roman','Times','serif';font-size:10pt;font-style:normal;font-weight:normal;line-height:1.19;text-align:left;">Press Release of Comfort Systems USA, Inc. dated October 27, 2021 reporting the Company&#8217;s financial results for the third quarter of 2021.</span></a></p></td></tr><tr><td style="vertical-align:top;width:7.22%;margin:0pt;padding:0pt;"><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;line-height:1.19;margin:0pt 0pt 0pt 10.8pt;"><span style="margin-left:0pt;visibility:hidden;">&#8203;</span></p></td><td style="vertical-align:bottom;width:2.22%;margin:0pt;padding:0pt;"><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;line-height:1.19;margin:0pt;"><span style="visibility:hidden;">&#8203;</span></p></td><td style="vertical-align:top;width:90.55%;margin:0pt;padding:0pt;"><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;line-height:1.19;margin:0pt;"><span style="visibility:hidden;">&#8203;</span></p></td></tr><tr><td style="vertical-align:top;width:7.22%;margin:0pt;padding:0pt;"><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;line-height:1.19;margin:0pt 0pt 0pt 10.8pt;">99.2</p></td><td style="vertical-align:bottom;width:2.22%;margin:0pt;padding:0pt;"><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;line-height:1.19;margin:0pt;"><span style="visibility:hidden;">&#8203;</span></p></td><td style="vertical-align:top;width:90.55%;margin:0pt;padding:0pt;"><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;line-height:1.19;margin:0pt;"><a style="-sec-extract:exhibit;" href="fix-20211027xex99d2.htm"><span style="font-family:'Times New Roman','Times','serif';font-size:10pt;font-style:normal;font-weight:normal;line-height:1.19;text-align:left;">Press Release of Comfort Systems USA,&#160;Inc. dated October 27, 2021 reporting the Company&#8217;s declaration of a quarterly dividend on the Company&#8217;s common stock to stockholders of record as of the close of business on the record date, November 12, 2021.</span></a></p></td></tr><tr><td style="vertical-align:top;width:7.22%;margin:0pt;padding:0pt;"><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;line-height:1.19;margin:0pt 0pt 0pt 10.8pt;"><span style="margin-left:0pt;visibility:hidden;">&#8203;</span></p></td><td style="vertical-align:bottom;width:2.22%;margin:0pt;padding:0pt;"><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;line-height:1.19;margin:0pt;"><span style="visibility:hidden;">&#8203;</span></p></td><td style="vertical-align:top;width:90.55%;margin:0pt;padding:0pt;"><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;line-height:1.19;margin:0pt;"><span style="visibility:hidden;">&#8203;</span></p></td></tr><tr><td style="vertical-align:top;width:7.22%;margin:0pt;padding:0pt;"><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;line-height:1.19;margin:0pt 0pt 0pt 10.8pt;">104</p></td><td style="vertical-align:bottom;width:2.22%;margin:0pt;padding:0pt;"><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;line-height:1.19;margin:0pt;"><span style="visibility:hidden;">&#8203;</span></p></td><td style="vertical-align:top;width:90.55%;margin:0pt;padding:0pt;"><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;line-height:1.19;margin:0pt;">Cover Page Interactive Data File (the cover page XBRL tags are embedded within the Inline XBRL document).</p></td></tr><tr><td style="vertical-align:top;width:7.22%;margin:0pt;padding:0pt;"><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;line-height:1.19;margin:0pt 0pt 0pt 10.8pt;"><span style="margin-left:0pt;visibility:hidden;">&#8203;</span></p></td><td style="vertical-align:bottom;width:2.22%;margin:0pt;padding:0pt;"><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;line-height:1.19;margin:0pt;"><span style="visibility:hidden;">&#8203;</span></p></td><td style="vertical-align:top;width:90.55%;margin:0pt;padding:0pt;"><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;line-height:1.19;margin:0pt;"><span style="visibility:hidden;">&#8203;</span></p></td></tr></table><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;line-height:1.19;margin:0pt;"><span style="font-size:1pt;visibility:hidden;">&#8203;</span></p><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;line-height:1.19;margin:0pt;"><span style="visibility:hidden;">&#8203;</span></p><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;line-height:1.37;margin:0pt 0pt 10pt 0pt;"><span style="line-height:1.19;margin-bottom:0pt;visibility:hidden;">&#8203;</span></p></div><div style="clear:both;margin-bottom:30pt;width:100%;"><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;line-height:1.19;text-align:center;margin:24pt 0pt 0pt 0pt;">3</p></div></div>
<div style="background-color:#000000;clear:both;height:2pt;page-break-after:always;width:79.41%;border:0;margin:30pt 10.29% 30pt 10.29%;"></div><div style="max-width:100%;padding-left:10.29%;padding-right:10.29%;position:relative;"><div style="clear:both;max-width:100%;position:relative;"><a id="_90432386_d97b_4f25_b0d0_e62854c8a594"></a><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;line-height:1.19;text-align:center;margin:0pt;"><b style="font-weight:bold;text-decoration:underline;text-decoration-color:#000000;">SIGNATURES</b></p><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;line-height:1.19;margin:0pt;"><span style="visibility:hidden;">&#8203;</span></p><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;line-height:1.19;text-indent:27pt;margin:0pt;">Pursuant to the requirements of the Securities Exchange Act of 1934, the Registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.</p><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;line-height:1.19;text-align:center;margin:0pt;"><span style="visibility:hidden;">&#8203;</span></p><table style="border-collapse:collapse;font-size:16pt;height:max-content;padding-left:0pt;padding-right:0pt;table-layout:auto;width:100%;"><tr style="height:1pt;"><td style="vertical-align:bottom;width:50%;margin:0pt;padding:0pt;"><div style="height:1pt;overflow:hidden;overflow-wrap:break-word;position:relative;"><div style="bottom:0pt;position:absolute;width:100%;"><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;line-height:1.19;margin:0pt;"><span style="font-size:1pt;visibility:hidden;">&#8203;</span></p></div></div></td><td style="vertical-align:bottom;width:4.34%;margin:0pt;padding:0pt;"><div style="height:1pt;overflow:hidden;overflow-wrap:break-word;position:relative;"><div style="bottom:0pt;position:absolute;width:100%;"><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;line-height:1.19;margin:0pt;"><span style="font-size:1pt;visibility:hidden;">&#8203;</span></p></div></div></td><td style="vertical-align:bottom;width:45.65%;margin:0pt;padding:0pt;"><div style="height:1pt;overflow:hidden;overflow-wrap:break-word;position:relative;"><div style="bottom:0pt;position:absolute;width:100%;"><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;line-height:1.19;margin:0pt;"><span style="font-size:1pt;visibility:hidden;">&#8203;</span></p></div></div></td></tr><tr><td style="vertical-align:bottom;width:50%;margin:0pt;padding:0pt;"><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;line-height:1.19;margin:0pt;"><span style="visibility:hidden;">&#8203;</span></p></td><td style="vertical-align:bottom;width:4.34%;margin:0pt;padding:0pt;"><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;line-height:1.19;margin:0pt;"><span style="visibility:hidden;">&#8203;</span></p></td><td style="vertical-align:bottom;width:45.65%;margin:0pt;padding:0pt;"><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;line-height:1.19;margin:0pt;">COMFORT SYSTEMS USA,&#160;INC.</p></td></tr><tr><td style="vertical-align:bottom;width:50%;margin:0pt;padding:0pt;"><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;line-height:1.19;margin:0pt;"><span style="visibility:hidden;">&#8203;</span></p></td><td style="vertical-align:bottom;width:4.34%;margin:0pt;padding:0pt;"><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;line-height:1.19;margin:0pt;"><span style="visibility:hidden;">&#8203;</span></p></td><td style="vertical-align:bottom;width:45.65%;margin:0pt;padding:0pt;"><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;line-height:1.19;margin:0pt;"><span style="visibility:hidden;">&#8203;</span></p></td></tr><tr><td style="vertical-align:bottom;width:50%;margin:0pt;padding:0pt;"><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;line-height:1.19;margin:0pt;"><span style="visibility:hidden;">&#8203;</span></p></td><td style="vertical-align:bottom;width:4.34%;margin:0pt;padding:0pt;"><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;line-height:1.19;margin:0pt;"><span style="visibility:hidden;">&#8203;</span></p></td><td style="vertical-align:bottom;width:45.65%;margin:0pt;padding:0pt;"><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;line-height:1.19;margin:0pt;"><span style="visibility:hidden;">&#8203;</span></p></td></tr><tr><td style="vertical-align:bottom;width:50%;margin:0pt;padding:0pt;"><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;line-height:1.19;margin:0pt;"><span style="visibility:hidden;">&#8203;</span></p></td><td style="vertical-align:bottom;width:4.34%;margin:0pt;padding:0pt;"><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;line-height:1.19;margin:0pt;">By:</p></td><td style="vertical-align:bottom;width:45.65%;border-bottom:1px solid #000000;margin:0pt;padding:0pt;"><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;line-height:1.19;margin:0pt;">/s/ Laura F. Howell</p></td></tr><tr><td style="vertical-align:bottom;width:50%;margin:0pt;padding:0pt;"><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;line-height:1.19;margin:0pt;"><span style="visibility:hidden;">&#8203;</span></p></td><td style="vertical-align:bottom;width:4.34%;margin:0pt;padding:0pt;"><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;line-height:1.19;margin:0pt;"><span style="visibility:hidden;">&#8203;</span></p></td><td style="vertical-align:bottom;width:45.65%;margin:0pt;padding:0pt;"><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;line-height:1.19;margin:0pt;">Laura F. Howell, Vice President and General Counsel</p></td></tr></table><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;line-height:1.19;margin:0pt;"><span style="visibility:hidden;">&#8203;</span></p><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;line-height:1.19;margin:0pt;">Date:&#160;&#160;&#160;&#160;&#160;&#160;October 27, 2021</p><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;line-height:1.37;margin:0pt 0pt 10pt 0pt;"><span style="line-height:1.19;margin-bottom:0pt;visibility:hidden;">&#8203;</span></p></div><div style="clear:both;margin-bottom:30pt;width:100%;"><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;line-height:1.19;text-align:center;margin:24pt 0pt 0pt 0pt;">4</p></div></div>
<div style="background-color:#000000;clear:both;height:2pt;margin-left:10.29%;margin-right:10.29%;margin-top:30pt;page-break-after:avoid;width:79.41%;border:0;"></div></body></html>
[{"type": "8-K", "sequence": "1", "filename": "fix-20211027x8k.htm", "description": "8-K", "secsgml_size_bytes": 47762}]
{"company-data": {"conformed-name": "COMFORT SYSTEMS USA INC", "cik": "0001035983", "assigned-sic": "1731", "irs-number": "760526487", "fiscal-year-end": "1231"}, "filing-values": {"form-type": "8-K", "act": "34", "file-number": "001-13011", "film-number": "211353008"}, "business-address": {"street1": "675 BERING DRIVE", "street2": "SUITE 400", "city": "HOUSTON", "state": "TX", "zip": "77057", "phone": "7138309600"}, "mail-address": {"street1": "675 BERING DRIVE", "street2": "SUITE 400", "city": "HOUSTON", "state": "TX", "zip": "77057"}}
​
​
UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
​
FORM
8-K
​
CURRENT REPORT
Pursuant to Section 13 OR 15(d) of The Securities Exchange Act of 1934
​
Date of Report (Date of earliest event reported)
October 27, 2021
​
Comfort Systems USA, Inc.
(Exact name of registrant as specified in its charter)
​
​
​
​
​
​
Delaware
1-13011
76-0526487
(State or other jurisdiction
​
(Commission
​
(IRS Employer
of incorporation)
​
File Number)
​
Identification No.)
​
​
​
​
675 Bering Drive, Suite 400
​
Houston
,
Texas
​
77057
(Address of principal executive offices)
​
(Zip Code)
​
Registrant's telephone number, including area code
(
713
)
830-9600
​
(Former name or former address, if changed since last report.)
​
Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:
​
☐
Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)
☐
Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)
☐
Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))
☐
Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))
​
Securities registered pursuant to Section 12(b) of the Act:
​
Title of each class
Trading Symbol(s)
Name of each exchange on which registered
Common Stock, $0.01 par value
FIX
New York Stock Exchange
​
Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter).
​
Emerging growth company
☐
​
If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act.
☐
​
​
ITEM 2.02
Results of Operations and Financial Condition
​
Attached and incorporated herein by reference as Exhibit 99.1 is a copy of a press release of Comfort Systems USA, Inc. (the "Company") dated October 27, 2021 reporting the Company's financial results for the third quarter of 2021.
​
The above information and attached press release are being furnished pursuant to Item 2.02 of Form 8-K and General Instruction B.2 thereunder. The information included herein and in the attached press release shall not be deemed "filed" for purposes of Section 18 of the Securities Exchange Act of 1934, as amended, or otherwise subject to the liabilities of that section, nor shall it be deemed incorporated by reference in any filing under the Securities Act of 1933, as amended.
​
ITEM 8.01
Other Events
​
Attached and incorporated herein by reference as Exhibit 99.2 is a copy of a press release of the Company dated October 27, 2021 reporting the Company's declaration of a quarterly dividend on the Company's common stock to stockholders of record as of the close of business on the record date, November 12, 2021.
​
ITEM 9.01
Financial Statements and Exhibits
​
(d)  The following Exhibits are included herein:
​
Exhibit 99.1 Press Release of Comfort Systems USA, Inc. dated October 27, 2021 reporting the Company's financial results for the third quarter of 2021.
​
Exhibit 99.2 Press Release of Comfort Systems USA, Inc. dated October 27, 2021 reporting the Company's declaration of a quarterly dividend on the Company's common stock to stockholders of record as of the close of business on the record date, November 12, 2021.
​
2
EXHIBIT INDEX
​
​
​
​
Exhibit
Number
Exhibit Title or Description
​
​
​
99.1
​
Press Release of Comfort Systems USA, Inc. dated October 27, 2021 reporting the Company's financial results for the third quarter of 2021.
​
​
​
99.2
​
Press Release of Comfort Systems USA, Inc. dated October 27, 2021 reporting the Company's declaration of a quarterly dividend on the Company's common stock to stockholders of record as of the close of business on the record date, November 12, 2021.
​
​
​
104
​
Cover Page Interactive Data File (the cover page XBRL tags are embedded within the Inline XBRL document).
​
​
​
​
​
​
3
SIGNATURES
​
Pursuant to the requirements of the Securities Exchange Act of 1934, the Registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.
​
​
​
​
​
​
COMFORT SYSTEMS USA, INC.
​
​
​
​
​
​
​
By:
/s/ Laura F. Howell
​
​
Laura F. Howell, Vice President and General Counsel
​
Date:      October 27, 2021
​
4