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Title: 12" Double Slot Linear Diffuser Plenum Box  
Category: HVAC Accessories  
Brand: Texas Buildmart  
Description: A galvanized, foam‑insulated plenum box that fits a 12" linear slot diffuser for efficient heating and cooling.  
Details: Features a 6" oval entry for flexible ducting, 13¼"×4⅜"×11¾" dimensions, and a design patent pending.

Price is $