12" X 10" Baseboard Return Air Grille - HVAC Vent Duct Cover - 7/8" Margin Turnback For Flush Fit With Baseboard Work - White Copper Coil Operating temperature from -40°f to

Operating temperature from -40°f to +248°f [-40°c to +120°c]

+ Product Details Size – 24"w X 22"h is the size for the duct opening measurement only

Actual Filter Size – 33 3/4"w x 29 3/4" x 1"

These are specially sized to fit into all drop ceilings

Ideal for Walls & Ceilings: Designed for seamless installation in standard 18" X 8" duct openings

12" X 10" Baseboard Return Air Grille - HVAC Vent Duct Cover - 7/8" Margin Turnback For Flush Fit With Baseboard Work - White Copper Coil Operating temperature from -40°f to+ Product Details Size 12"w X 10"h Is The Size For The Duct Opening Measurement Only, Actual Front End Outer Dimensions Are 13. 75" Width X 11. 75" Height SEE BELOW IN DESCRIPTION How To Measure A Grille Powder Coat Finish Smooth, shiny, scratch resistant, beautiful. Looks like it was just waxed. High Quality Easy unrestricted airflow for your HVAC system 7 8" margin turnback. Carefully Shrink Wrapped With cardboard backing to prevent damage in