ADCO Polar White A/C Cover 29.5" x 14.75" x 34" Fits Duo Therm / Briskair 13.5 - 15 B.T.U.Duo Therm #57915 AC135 and AC150. Deluxe heavy-duty white vinyl with contrasting welt cord & parachute drawstring. Reinforced construction offers weatherproof non-tearing seams for durability. Keep leaves and dirt out of your rooftop unit. Cuts down on drafts on cold days. 3 year warranty.