--- product_id: 725510685 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: "¥10311" currency: JPY in_stock: true category: "Tohonfoo" url: https://www.desertcart.jp/products/725510685-21lx15hx3-5d-indoor-air-conditioner-cover-for-window-units-3 store_origin: JP region: Japan --- # Perfect 21"x15"x3.5" fit Velcro-secure airtight 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:** ¥10311 **Availability:** ✅ In Stock ## Summary > ❄️ Seal the chill, save the bill — 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?** ¥10311 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/725510685-21lx15hx3-5d-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 sneaks in. - • **Dual Closable Cord Ports:** Wire holes on both sides with closures to keep drafts out and convenience in. - • **Energy-Saving Heat Guard:** Stops heat loss in winter, slashing your heating bills effortlessly. - • **Triple-Layer Thermal Shield:** 600D waterproof 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, no gaps, no fuss. ## 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 an airtight seal. Dual closable cord holes prevent cold air leaks, helping reduce heating costs by preventing heat loss during colder months. ## 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 Name | TOHONFOO | | Closure Type | Hook & Loop | | Color | Brown | | Customer Reviews | 4.7 4.7 out of 5 stars (8) | | Item Type Name | Air Conditioner Cover Indoor | | Item Weight | 0.24 Kilograms | | Manufacturer | TOHONFOO | | Manufacturer Part Number | HF-ACCI-21-15-3.5-BN | | Material Type | aluminum | | Model Number | HF-ACCI-21-15-3.5-BN | | Water Resistance Level | Waterproof | ## Product Details - **Brand:** TOHONFOO - **Colour:** Brown - **Item weight:** 0.24 Kilograms - **Material:** aluminum - **Water resistance level:** Waterproof ## 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 **Color, Size** options. --- ## 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/725510685-21lx15hx3-5d-indoor-air-conditioner-cover-for-window-units-3](https://www.desertcart.jp/products/725510685-21lx15hx3-5d-indoor-air-conditioner-cover-for-window-units-3) --- *Product available on Desertcart Japan* *Store origin: JP* *Last updated: 2026-09-30*