12" X 12" Heavy Duty Floor Return Air Grille ( White)
Quantity in Basket: None
12" x 12" Heavy Duty Steel Return Air Grille:
All-Steel Construction Provides firm, smooth surface Extremely rigid
Free area averages over 75%.
Color of Paint:Brown Enamel Finish.
When Ordering your New Replacement Return Air Grill, Diffuser.
DO NOT MEASURE YOUR EXISTING GRILL.
The Correct way to Order the new Replacement Return Grill is by Measuring the Hole Size.
Measure the Holes Width and Height.
If your Return Air Hole Size is 25" wide by 20" tall, you will need to order a Return Air Grill 25x20.
The Overall Return Air Grills Size is 1-3/4" Width by 1-3/4" Height bringing the entire Return Air Grills Size to 26-3/4" x 21-3/4".
The extra 1-3/4" is designed to hide the old paint markings on the wall or ceiling.
* Frequently Asked Questions *
What is "Free Area"? Free area is the total minimum area of the openings in the supply outlet or return inlet (usually in square inches) through which air can pass. Also known as the "see-through area". (See also "effective area"). What is "Effective Area" ? Effective area is the net area (in square feet) of a grille utilized by the area stream in passing through the face openings. It is used in the equation: CFM= Face Velocity X Effective Area. This is the basis for most engineering data.