AIR CONDITIONING WINDOW UNIT LARGE EXTERIOR COVER Air conditioner large exterior cover. Excellent for both central and window units. It is an attractive neutral color, that is easy to use and comes with a 10 year limited warranty. 19.8 x 10.5 x 5 inches 4.9 out of 5 stars #21,932 in Home and Kitchen (See Top 100 in Home and Kitchen) #8 in Home & Kitchen > Heating, Cooling & Air Quality > Air Conditioners & Accessories > Replacement Parts > Filters #1,084 in Home Improvement > Appliances > Large Appliance Accessories See all 19 customer reviews See all 19 customer reviews (newest first) "Dimensions for large AC-513 cover are 18-21"H x 26-29"W x 24"D; this info was not posted in product information. I'm pleased w the quality. bigger than advertised but better too big than too small. Wraps around nicely and the 2 straps are simple to adjust. Kept the wind out nicely I've purchased and installed numerous covers over the years. None of them lasted more than two seasons, and I'd still feel a draft inside.