--- product_id: 740332343 title: "21\"Lx15\"Hx3.5\"D Indoor Air Conditioner Cover for Window Units, 3 Layers Insulation AC Cover for Inside Wall Unit with Aluminum Foil and 2mm Foam, Windproof Window Air Conditioner Cover Inside, Brown" brand: "tohonfoo" price: "¥18424" currency: JPY in_stock: true reviews_count: 5 url: https://www.desertcart.jp/products/740332343-21lx15hx3-5d-indoor-air-conditioner-cover-for-window-units-3 store_origin: JP region: Japan --- # Perfect 21"x15"x3.5" fit Velcro-secure seal 3-layer insulation tech 21"Lx15"Hx3.5"D Indoor Air Conditioner Cover for Window Units, 3 Layers Insulation AC Cover for Inside Wall Unit with Aluminum Foil and 2mm Foam, Windproof Window Air Conditioner Cover Inside, Brown **Brand:** tohonfoo **Price:** ¥18424 **Availability:** ✅ In Stock ## Summary > ❄️ Seal in comfort, seal out the chill — your AC’s winter armor! ## Quick Answers - **What is this?** 21"Lx15"Hx3.5"D Indoor Air Conditioner Cover for Window Units, 3 Layers Insulation AC Cover for Inside Wall Unit with Aluminum Foil and 2mm Foam, Windproof Window Air Conditioner Cover Inside, Brown by tohonfoo - **How much does it cost?** ¥18424 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.jp](https://www.desertcart.jp/products/740332343-21lx15hx3-5d-indoor-air-conditioner-cover-for-window-units-3) ## 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 - • **Velcro Lockdown System:** Pre-sewn & adhesive-backed velcro ensures zero cold air leaks. - • **Energy-Smart Heat Saver:** Stops heat loss in winter, slashing your heating bills effortlessly. - • **Dual Closable Cord Ports:** Wire holes on both sides with closures to keep drafts out and style in. - • **Triple-Layer Thermal Shield:** 600D Oxford + 2mm foam + aluminum foil block drafts like a pro. - • **Tailored Fit for 6000-8000 BTU Units:** Precisely sized to snugly cover your indoor AC without gaps. ## Overview The TOHONFOO Indoor Air Conditioner Cover features a robust three-layer insulation system combining waterproof 600D Oxford fabric, 2mm thick pearl cotton foam, and reflective aluminum foil to block drafts effectively. Designed to fit most 6000-8000 BTU window units (21"L x 15"H x 3.5"D), it uses a secure velcro closure system for a tight seal, reducing heat loss and lowering heating costs. Dual closable cord holes add convenience and prevent cold air infiltration, making it a smart, energy-efficient winter accessory. ## Description 1 ## Features - 【Three Layers Of Insulation To Block Drafts】Unlike other single-layer covers, Tohonfoo window air conditioner cover use a three-layer structure: 600D waterproof heavy duty oxford material, 2mm thickened pearl cotton, insulated aluminum foil. - 【Perfect Fit】The inner size of the indoor air conditioner cover is 21"Lx15"Hx3.5"D, fitting most of 6000-8000BTU window air conditioners or indoor AC unit size of 19"-21"x 13"-15" x 3"(L x H x D). Note: Please measure your unit before purchasing. - 【Velcro Make the Cover Stick Better】Our air conditioner cover for inside comes with pre-sewn velcro and adhesive-backed velcro for quick and secure attachment to your window air conditioner, ensuring a tight seal with no cold air leakage. - 【Reduce Heating Costs】The AC covers for inside wall unit will effectively block any wind and cold air from entering into the room to ensure that there is no heat loss, which can prevent heat loss in the winter to reducing heating costs. - 【Two Closable Cord Holes】Unlike many air conditioner covers that only have one wire hole, we have wire holes on both sides, and our wire holes can be closed to avoid drafts through the wire holes. ## Technical Specifications | Specification | Value | |---------------|-------| | Asin | B0D9MDL5ST | | Brand | TOHONFOO | | Closure Type | Hook & Loop | | Colour | Brown | | Customer Reviews | 4.4 4.4 out of 5 stars (442) 4.4 out of 5 stars | | Item Type Name | Air Conditioner Cover Indoor | | Item Weight | 0.24 Kilograms | | Manufacturer | TOHONFOO | | Material | Oxford fabric | | Model Number | HF-ACCI-21-15-3.5-BN | | Number Of Items | 20 | | Part Number | HF-ACCI-21-15-3.5-BN | | Water Resistance Level | Waterproof | ## Product Details - **Colour:** Brown - **Brand:** TOHONFOO - **Item weight:** 0.24 Kilograms - **Water resistance level:** Waterproof - **Closure type:** Hook & Loop ## Images ![21"Lx15"Hx3.5"D Indoor Air Conditioner Cover for Window Units, 3 Layers Insulation AC Cover for Inside Wall Unit with Aluminum Foil and 2mm Foam, Windproof Window Air Conditioner Cover Inside, Brown - Image 1](https://m.media-amazon.com/images/I/71uB-UD5VML.jpg) ![21"Lx15"Hx3.5"D Indoor Air Conditioner Cover for Window Units, 3 Layers Insulation AC Cover for Inside Wall Unit with Aluminum Foil and 2mm Foam, Windproof Window Air Conditioner Cover Inside, Brown - Image 2](https://m.media-amazon.com/images/I/71XppHV94SL.jpg) ![21"Lx15"Hx3.5"D Indoor Air Conditioner Cover for Window Units, 3 Layers Insulation AC Cover for Inside Wall Unit with Aluminum Foil and 2mm Foam, Windproof Window Air Conditioner Cover Inside, Brown - Image 3](https://m.media-amazon.com/images/I/713nzgMbxiL.jpg) ![21"Lx15"Hx3.5"D Indoor Air Conditioner Cover for Window Units, 3 Layers Insulation AC Cover for Inside Wall Unit with Aluminum Foil and 2mm Foam, Windproof Window Air Conditioner Cover Inside, Brown - Image 4](https://m.media-amazon.com/images/I/711MumSwJ4L.jpg) ![21"Lx15"Hx3.5"D Indoor Air Conditioner Cover for Window Units, 3 Layers Insulation AC Cover for Inside Wall Unit with Aluminum Foil and 2mm Foam, Windproof Window Air Conditioner Cover Inside, Brown - Image 5](https://m.media-amazon.com/images/I/717rnBz1aPL.jpg) ## Available Options This product comes in different **Colour Name, Size Name** options. ## Customer Reviews ### ⭐⭐⭐⭐⭐ 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... ### ⭐⭐ needs better designing *by on Reviewed in the United States 12 October 2024* This cover will not fit my a/c unit. It's a wall unit. The cord has no place to go with where it is positioned. It is a good idea overall, but it needs some design work. --- ## 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.jp/products/740332343-21lx15hx3-5d-indoor-air-conditioner-cover-for-window-units-3](https://www.desertcart.jp/products/740332343-21lx15hx3-5d-indoor-air-conditioner-cover-for-window-units-3) --- *Product available on Desertcart Japan* *Store origin: JP* *Last updated: 2026-09-24*