Protecting your through the wall or window air conditioner during winter is essential to prevent cold drafts, dust, and weather damage, while helping save energy by reducing heat loss. Below is a summary of top-rated air conditioner covers designed for winter protection. These covers vary in materials, insulation layers, and fit types, offering different levels of protection for both indoor and outdoor units.
| Product | Brand | Key Features |
|---|---|---|
| J&C Indoor AC Cover for Wall & Window Units | J&C | Windproof, dust proof, elastic drawstring fit with cable hole |
| Outside Insulated Window Air Conditioner Cover | i frmmy | Triple-layer waterproof, aluminum foil heat reflection, adjustable straps |
| JEACENT Indoor Air Conditioner Cover Double Insulation | JEACENT | Fits most small units, reduces cold drafts and heating costs |
| UNUN Outdoor Window AC Unit Cover with Straps | UNUN | Heavy-duty 600D oxford fabric, waterproof, UV stabilized, adjustable straps |
| Luxiv Winter Window Air Conditioner Cover 3 Layer | Luxiv | Three-layer waterproof insulation, snowproof, double straps |
Content Navigation
- J&C Indoor AC Cover for Wall Units & Window Units
- Outside Insulated Window Air Conditioner Cover by i frmmy
- JEACENT Indoor Air Conditioner Cover Double Insulation Small
- UNUN Window Air Conditioner Covers Outdoor with Adjustable Straps
- Luxiv Winter Window Air Conditioner Cover with Triple Layer
- Buying Guide For Through The Wall Air Conditioner Covers
J&C Indoor AC Cover for Wall Units & Window Units

The J&C Indoor AC Cover offers protection against cold drafts and dust for both wall and window air conditioners indoors. Its windproof design prevents cold air infiltration, reducing heat loss during cold months. The cover uses an elastic hem and drawstring for a custom secure fit with a convenient hole to accommodate power cables without needing to remove the cover.
This cover is made to help you avoid removing and reinstalling your AC unit in winter, saving time and effort. Its dust-proof barrier also prevents debris from entering the indoor space, maintaining a clean environment. Easy installation and snug fitting make it ideal for energy-conscious households.
Outside Insulated Window Air Conditioner Cover by i frmmy

This heavy-duty outdoor AC cover is designed for all-weather protection, shielding your outdoor through-the-wall unit from rain, snow, and cold air. Its clever triple-layer construction features a waterproof black outer layer, reflective aluminum foil in the middle, and insulating pearl cotton inside. This provides excellent insulation to maintain your home’s indoor temperature and reduces energy loss.
An adjustable strap system with metal buckles secures the cover firmly in place against wind and physical damage. The cover fits units measuring 21″ x 15″ x 16″ (WxHxD), making it versatile for most medium-sized outdoor units.
JEACENT Indoor Air Conditioner Cover Double Insulation Small

The JEACENT Indoor Cover specializes in covering smaller air conditioner units ranging from 3,000 to 7,000 BTU. It effectively stops cold air drafts from entering through your AC unit, maintaining indoor warmth and reducing heating costs. With inside dimensions of 19-21″ long, 11-15″ high, and 3.5″ deep, it fits most small window and through-the-wall units.
Designed for ease of use, it eliminates the hassle of removing the AC by providing a direct insulating cover. The double insulation enhances the thermal barrier between your heated indoor space and chilly outdoor conditions.
UNUN Window Air Conditioner Covers Outdoor with Adjustable Straps

The UNUN outdoor cover uses durable 600D oxford fabric with a waterproof inner layer, ensuring robust protection against rain, snow, UV rays, and dirt. Measuring 25.5″ wide x 17″ high x 21″ deep, it fully covers the external portion of most window/wall-mounted AC units, including the bottom.
Its double strap buckle design allows for an adjustable, secure fit that does not require unit removal. UV stabilization protects the cover itself from sunlight degradation, making this a long-lasting solution for harsh winters.
Luxiv Winter Window Air Conditioner Cover with Triple Layer

Luxiv’s three-layer insulated cover is crafted from a 420D waterproof Oxford cloth outer shell, an inner aluminum foil layer, and antifreeze pearl cotton insulation. This triple-layer design delivers comprehensive protection against cold, snow, rain, dust, and wind while preserving your unit’s efficiency.
The cover includes two adjustable straps with snap buckles to ensure a snug, wind-resistant fit. High-temperature press glue seals each seam for enhanced waterproof and windproof performance. This cover is especially tailored to maintain indoor warmth and prevent external damage to your unit during winter.
Buying Guide For Through The Wall Air Conditioner Covers
Choosing the right winter cover for your through-the-wall air conditioner involves several factors to ensure optimal protection and energy savings.
Indoor vs. Outdoor Covers
Indoor covers typically focus on preventing cold drafts and dust ingress while maintaining an aesthetic fit. Outdoor covers must protect against rain, snow, UV damage, and physical impacts. Select based on where your unit’s vulnerable parts are exposed during winter.
Material and Insulation
Heavy-duty waterproof fabrics like Oxford cloth with additional insulation layers (such as aluminum foil and pearl cotton) provide the best protection. Reflective layers help maintain heat indoors while waterproofing prevents moisture damage. Avoid thin or purely plastic covers which may crack or allow moisture buildup.
Size and Fit
Measure your AC unit’s dimensions carefully. Improper fit reduces effectiveness by allowing drafts or moisture in. Adjustable features like drawstrings and straps enhance secure installation. Some covers include cable access holes, improving user convenience.
Durability and Weather Resistance
Look for UV-stabilized fabrics to avoid sun damage during off-seasons. Reinforced seams and high-quality stitching improve longevity. Waterproof and windproof seals keep your unit dry and protected even in severe weather conditions.
Ease of Installation and Maintenance
Covers that do not require removing the AC unit save time and effort. Features like elastic hems, adjustable straps, and hooks aid quick installation. Materials that are easy to clean enable reuse over multiple winters.
Additional Protection Features
Some covers offer pest and debris protection, preventing animals and dirt buildup. This enhances the unit’s lifespan and reduces maintenance.
By considering these factors, you can select a winter air conditioner cover that will safeguard your unit, reduce energy waste, and extend its operational life through harsh seasons.