Air Conditioner Covers for Inside 21"W x 15"H x 3.5"D

Features

• Boasting a triple-insulation design, this indoor AC cover outperforms single-layer alternatives with 600D waterproof Oxford cloth, 2mm thick pearl cotton, and heat-reflective aluminum foil to seal out drafts completely.
• To ensure a perfect fit, check your window AC unit’s dimensions first—the cover’s interior measures 21"W x 15"H x 3.5"D, ideal for devices ranging from 19–20.5"W x 13–14.5"H x 3"D in size.
• Equipped with pre-attached, self-adhesive hook-and-loop straps, the cover installs in seconds for a tight, airtight lock on your indoor AC, stopping cold air leaks and boosting overall insulation efficiency.
• Cut down on winter heating bills with this high-performance cover—it forms a thermal barrier that traps indoor warmth and blocks outside drafts, minimizing heat loss and lowering your monthly energy costs.
• Featuring two closable cord holes on both sides (a step up from single-port competitors), the design lets you route cables easily while sealing every gap to prevent cold air from seeping in.