---
product_id: 740332355
title: "Window Air Conditioner Covers for Inside 21\"W x 15\"H x 3.5\"D, Black | 3-Layer insulated window AC cover, with aluminum foil & EPE foam, hook-and-loop fastening around edges for tight seal"
brand: "tohonfoo"
price: "355.43 DT"
currency: TND
in_stock: true
reviews_count: 5
category: "Tohonfoo"
url: https://www.desertcart.tn/products/740332355-window-air-conditioner-covers-for-inside-21w-x-15h-x
store_origin: TN
region: Tunisia
---

# Perfect fit for 21"x15"x3.5" AC units Velcro seal ensures airtight closure 3-layer insulation blocks drafts Window Air Conditioner Covers for Inside 21"W x 15"H x 3.5"D, Black | 3-Layer insulated window AC cover, with aluminum foil & EPE foam, hook-and-loop fastening around edges for tight seal

**Brand:** tohonfoo
**Price:** 355.43 DT
**Availability:** ✅ In Stock

## Summary

> ❄️ Lock in warmth, lock out winter chills — your AC’s winter armor!

## Quick Answers

- **What is this?** Window Air Conditioner Covers for Inside 21"W x 15"H x 3.5"D, Black | 3-Layer insulated window AC cover, with aluminum foil & EPE foam, hook-and-loop fastening around edges for tight seal by tohonfoo
- **How much does it cost?** 355.43 DT with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.tn](https://www.desertcart.tn/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

- • **Secure Velcro Fastening:** Pre-sewn and adhesive-backed Velcro guarantees a snug, draft-proof seal
- • **Dual Closable Cord Ports:** Two wire holes with closures prevent cold air leaks around cords
- • **Slash Your Heating Bills:** Blocks cold drafts to keep warmth in and reduce winter energy costs
- • **Tailored Fit for Your AC:** Precisely sized to fit most 6000-8000 BTU window units, eliminating gaps
- • **Triple-Layer Thermal Shield:** 600D Oxford + Pearl Cotton + Aluminum Foil for unbeatable insulation

## Overview

The TOHONFOO Window Air Conditioner Cover is a premium indoor cover designed to fit 21"x15"x3.5" AC units. Featuring a robust 3-layer insulation system—waterproof 600D Oxford fabric, thick pearl cotton, and reflective aluminum foil—this cover blocks drafts and moisture effectively. Its secure Velcro fastening and dual closable cord holes ensure a tight seal, preventing heat loss and reducing winter heating costs. Ideal for professionals seeking efficient, durable, and sleek winter protection for their window AC units.

## Description

1

Review: No More DIY - 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.
Review: Still too early to comment on function but... - 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...

## 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 | B0D9MCM85K |
| Brand | TOHONFOO |
| Colour | Black |
| Customer Reviews | 4.4 out of 5 stars 435 Reviews |
| 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 |
| Water resistance level | Waterproof |

## Product Details

- **Colour:** Black
- **Brand:** TOHONFOO
- **Water resistance level:** Waterproof

## Images

![Window Air Conditioner Covers for Inside 21"W x 15"H x 3.5"D, Black | 3-Layer insulated window AC cover, with aluminum foil & EPE foam, hook-and-loop fastening around edges for tight seal - 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 | 3-Layer insulated window AC cover, with aluminum foil & EPE foam, hook-and-loop fastening around edges for tight seal - 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 | 3-Layer insulated window AC cover, with aluminum foil & EPE foam, hook-and-loop fastening around edges for tight seal - 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 | 3-Layer insulated window AC cover, with aluminum foil & EPE foam, hook-and-loop fastening around edges for tight seal - 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 | 3-Layer insulated window AC cover, with aluminum foil & EPE foam, hook-and-loop fastening around edges for tight seal - Image 5](https://m.media-amazon.com/images/I/713O+3QJ2dL.jpg)

## Available Options

This product comes in different **Color, Size** options.

## Customer Reviews

### ⭐⭐⭐⭐⭐ No More DIY
*by J***. on 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 C***Y on 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 X***O on 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.

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*Product available on Desertcart Tunisia*
*Store origin: TN*
*Last updated: 2026-07-31*