Be sure to remove old grill and measure opening in the floor to get the correct dimensions. This grill is for a hole in the floor that is 14 x 20. DO NOT measure the face of the old grill. If the hole in the floor is 14 x 20 this grill will sit into the hole as the back is a ¼” smaller than that hole size. Made of high-quality solid steel to maintain an extremely ridged heavy-duty construction for long term durability in your residential home. This product is meticulously powder coated with tough non-scuff brown powder coating on each piece before the pieces are assembled into the final grill. This insures 100% powder coat coverage and a product that is highly resistant to corrosion when exposed to humidity. Boasting over 75% free space for air movement this grill will work excellent for either returning air to your furnace or allowing the most air possible into any room. This product is a grill only and does not have a damper to control air flow, this product is free flow only. Be sure to check out all the photos – dimensions are shown. Overall faceplate: 15 ¾” x 21 ¾” & Overall inside: 13 ¾” x 19 ¾” These TruAire heavy gauge all steel floor grills will be perfect for your home. Allowing over 75% free flowing air this assures ample air return to your furnace or excellent flow of air into any room. As this is meant for free-flowing air this grill does NOT come with a damper to control air flow. The non-scuff brown powder coating is put on all parts before assembly of the finished product insuring 100% coverage of all the steel parts. There is no need to worry about issues with humidity. This item is made for a hole in the floor and can NOT be used on the wall. The excellent rigidity assures no one will break through this grill while walking on it. To ensure a proper fit be sure to measure the hole in the floor NOT the old grill. Made for an 14 x 20 floor hole the overall faceplate size is 15 ¾” x 21 ¾”