--- product_id: 740332355 title: "Window Air Conditioner Covers for Inside 21\"W x 15\"H x 3.5\"D, Black" brand: "tohonfoo" price: "₨27478" currency: LKR in_stock: true reviews_count: 5 url: https://www.desertcart.lk/products/740332355-window-air-conditioner-covers-for-inside-21w-x-15h-x store_origin: LK region: Sri Lanka --- # hook-and-loop secure straps draft-blocking insulation 3-layer thermal barrier Window Air Conditioner Covers for Inside 21"W x 15"H x 3.5"D, Black **Brand:** tohonfoo **Price:** ₨27478 **Availability:** ✅ In Stock ## Summary > ❄️ Seal in warmth, block the chill—winter-proof your AC like a pro! ## Quick Answers - **What is this?** Window Air Conditioner Covers for Inside 21"W x 15"H x 3.5"D, Black by tohonfoo - **How much does it cost?** ₨27478 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.lk](https://www.desertcart.lk/products/740332355-window-air-conditioner-covers-for-inside-21w-x-15h-x) ## Best For - tohonfoo enthusiasts ## Why This Product - Trusted tohonfoo brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Snug, Slip-Free Fit:** Pre-sewn adhesive-backed hook-and-loop straps ensure quick installation and airtight seal—no slipping, no fuss - • **Perfect Fit Guarantee:** Designed for indoor AC units up to 21"W x 15"H x 3.5"D—measure before you buy for flawless coverage - • **Energy-Smart Insulation:** Blocks cold drafts and reduces heating costs by maintaining indoor warmth efficiently - • **Customizable Cord Access:** Two closable cord holes let you route power cables neatly while keeping drafts out - • **Triple-Layer Thermal Defense:** 600D waterproof Oxford + 2mm pearl cotton + reflective aluminum foil for unbeatable winter warmth ## Overview The TOHONFOO Window Air Conditioner Cover features a robust triple-layer insulation system combining waterproof Oxford fabric, pearl cotton, and heat-reflective aluminum foil to protect indoor AC units from harsh winter drafts. Its strong hook-and-loop straps provide a secure, airtight fit that prevents slipping, while dual closable cord holes offer convenient cable management. Designed to fit units up to 21"W x 15"H x 3.5"D, this cover helps reduce heating costs by maintaining indoor warmth and blocking cold air infiltration. ## Description This winter air conditioner cover for inside can be used together with the outdoor unit cover in extreme cold or humid areas to maintain thermal insulation and prevent excessive moisture buildup inside the machine When using the air conditioner in summer, the cover needs to be removed. Simply detach the cover body itself; the half of the Velcro that adheres to the air conditioner unit does not need to be peeled off. In winter, you can just put the cover back on and use it directly — this applies to the AC cover indoor for window unit as well As long as it is the indoor unit of a window-type or wall-mounted air conditioner that falls within the inner diameter range marked on the cover, it can be used ## Features - 【Three-Layer Thermal Barrier – Built for Harsh Winter Winds】Unlike ordinary cotton covers, the Tohonfoo AC covers for inside uses a triple-layer system – 600D waterproof, tear-resistant Oxford fabric, 2mm pearl cotton, and heat-reflective aluminum foil – for superior windproof warmth in snow and freezing winds. Care: Do not machine or hand wash. Wipe dust with a damp cloth and air-dry; avoid scrubbing or twisting to protect the inner foil insulation - 【Please Choose the Right Size】 The inner dimensions of this air conditioner cover indoor are 21"W x 15"H x 3.5"D, fitting most AC units with outer dimensions of ≤20.5"W x 14.5"H x 3.5"D. Note: Please measure your unit's width, height, and depth (including any protruding parts) before purchasing to ensure a proper fit - 【Strong Hook-and-Loop Straps – No More Slipping】Unlike drawstring covers that tend to shift and slide around while you're putting them on, our indoor air conditioner cover features pre-sewn and adhesive-backed hook-and-loop straps for quick, fuss-free installation and a snug, airtight seal that blocks drafts effectively. The adhesive backing stays firmly on your AC unit, so when the cover is no longer needed, simply unfasten the straps and remove it – no need to re-peel the adhesive each time - 【Cut Winter Energy Costs】This indoor indoor ac cover for window unit effectively blocks cold drafts and minimizes heat transfer during winter months, helping you reduce heating costs. Its insulated design creates a thermal barrier to keep warm air in and cold air out - 【Two Closable Cord Holes】 Our winter window AC covers indoor feature dual closable cable openings on both sides, allowing you to route the power cord from either side for added convenience. These openings also let you make slight adjustments to the cover's position for a tighter, more customized fit, while the closable design keeps the ports fully sealed against drafts ## Technical Specifications | Specification | Value | |---------------|-------| | Asin | B0D9MCM85K | | Brand | TOHONFOO | | Colour | Black | | Customer Reviews | 4.4 4.4 out of 5 stars (440) 4.4 out of 5 stars | | Item Highlight | 3-Layer insulated window AC cover, with aluminum foil & EPE foam, hook-and-loop fastening around edges for tight seal | | Item Type Name | Air Conditioner Cover Indoor | | Manufacturer | TOHONFOO | | Model Number | HF-ACCI-21-15-3.5-BK | | Number Of Items | 1 | | Part Number | HF-ACCI-21-15-3.5-BK | | Water Resistance Level | Waterproof | ## Product Details - **Brand:** TOHONFOO - **Colour:** Black - **Number of items:** 1 - **Water resistance level:** Waterproof ## Images ![Window Air Conditioner Covers for Inside 21"W x 15"H x 3.5"D, Black - Image 1](https://m.media-amazon.com/images/I/71OFfBAH8TL.jpg) ![Window Air Conditioner Covers for Inside 21"W x 15"H x 3.5"D, Black - Image 2](https://m.media-amazon.com/images/I/71HejjNVONL.jpg) ![Window Air Conditioner Covers for Inside 21"W x 15"H x 3.5"D, Black - Image 3](https://m.media-amazon.com/images/I/71Cbhto2RyL.jpg) ![Window Air Conditioner Covers for Inside 21"W x 15"H x 3.5"D, Black - Image 4](https://m.media-amazon.com/images/I/71U4o64i43L.jpg) ![Window Air Conditioner Covers for Inside 21"W x 15"H x 3.5"D, Black - Image 5](https://m.media-amazon.com/images/I/713O+3QJ2dL.jpg) ## Available Options This product comes in different **Colour Name, Size Name** options. ## Customer Reviews ### ⭐⭐ Poor fit product *by on Reviewed in Canada 1 September 2026* Well made product but poor fit. Product was not a good fit over air conditioner and required added wrapping materials to close gaps. ### ⭐⭐⭐⭐⭐ No More DIY *by on Reviewed in the United States 19 October 2024* I'm from the Midwest and it gets COLD in the winter. I have tried several DIY options to keep the draft and moisture out due to having my air conditioners. This is great. We've had some chilly nights recently and I'm just getting prepared for the fall/winter. So far So Good. Snug fit, no moisture, keeps heat in. ### ⭐⭐⭐⭐⭐ Still too early to comment on function but... *by on Reviewed in the United States 10 September 2025* Fits great and was easy to get ready. Looks nice and seems durable for its purpose. We haven't had super cold or windy weather yet but it appears to block the bit of draft there is at this point but we're just finishing an Indian Summer before fall really starts to set in and then winter, which will be the real test, so if there's any problems with this not keeping the cold out this winter, I will update further. I'm in Wisconsin and we can get some brutally cold and ultra windy weather so we'll see what this cover can do... --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.lk/products/740332355-window-air-conditioner-covers-for-inside-21w-x-15h-x](https://www.desertcart.lk/products/740332355-window-air-conditioner-covers-for-inside-21w-x-15h-x) --- *Product available on Desertcart Sri Lanka* *Store origin: LK* *Last updated: 2026-09-20*