--- product_id: 674695689 title: "Indoor Air Conditioner Cover, 21Lx15Hx3.5D in Gray Window Winter Unit Cover Anti-Rust Adjustable for Window AC with Free Elastic Straps" brand: "runzeg" price: "$74.56" currency: USD in_stock: true category: "Runzeg" url: https://www.desertcart.us/products/674695689-indoor-air-conditioner-cover-21lx15hx3-5d-in-gray-window-winter store_origin: US region: United States of America --- # Adjustable fit for 5000-7000BTU AC units Dual straps ensure secure, snug fit Double insulation blocks cold & heat loss Indoor Air Conditioner Cover, 21Lx15Hx3.5D in Gray Window Winter Unit Cover Anti-Rust Adjustable for Window AC with Free Elastic Straps **Brand:** runzeg **Price:** $74.56 **Availability:** ✅ In Stock ## Summary > ❄️ Lock in warmth, lock out winter chills — your AC’s winter armor! ## Quick Answers - **What is this?** Indoor Air Conditioner Cover, 21Lx15Hx3.5D in Gray Window Winter Unit Cover Anti-Rust Adjustable for Window AC with Free Elastic Straps by runzeg - **How much does it cost?** $74.56 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/674695689-indoor-air-conditioner-cover-21lx15hx3-5d-in-gray-window-winter) ## Best For - runzeg enthusiasts ## Why This Product - Trusted runzeg brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Durable & Stylish:** Crafted from soft, high-quality gray polyester that’s washable, water-resistant, and blends seamlessly with modern interiors. - • **Secure & Hassle-Free:** Dual adjustable straps with snap buckles plus elastic cords guarantee a snug, no-slip fit that’s easy to install and remove. - • **Energy-Smart Protection:** Keeps dust, rain, and snow out while maintaining indoor warmth—protect your AC and your wallet this winter. - • **Perfect Fit, Every Time:** Adjustable 21Lx15Hx3.5D size fits most window AC units from 5000 to 7000 BTU, eliminating guesswork. - • **Winter-Proof Insulation:** Double-layered windblock poly lining with embedded cotton blocks cold drafts and prevents heat loss, slashing your heating bills. ## Overview The RUNZEG Indoor Air Conditioner Cover is a durable, adjustable 21x15x3.5 inch gray polyester cover designed for 5000-7000 BTU window AC units. Featuring double insulation with windblock poly and cotton lining, it prevents heat loss and cold air infiltration, reducing heating costs. Dual adjustable straps and elastic cords ensure a secure fit, while the washable, water-resistant fabric protects your unit from dust, rain, and snow during winter months. ## Description Buy RUNZEG Indoor Air Conditioner Cover, 21Lx15Hx3.5D in Gray Window Winter Unit Cover Anti-Rust Adjustable for Window AC with Free Elastic Straps: Accessories - desertcart.com ✓ FREE DELIVERY possible on eligible purchases ## Features - Choose the Right Size: RUNZEG Window AC unit cover is adjuatable, size is 21Lx15Hx3.5D IN, suit for most of 5000BTU to 7000BTU window air conditioners or indoor AC unit size. - Double Insulation: The windblock poly inner lining and the outside cover are stitched together for easy installastion. The indoor air conditioner cover with embedded cotton blocks warm air escaping and cold air getting through in AC.Prevent heat loss in the winter to reducing heating costs. - Double Straps Fix: Adjustable straps on both sides and elastic cords around allows you to achieve a snug fit.Provide customized fit. Indoor window AC protection cover has two adjustable straps with snap buckle, elastic straps will make the cover never falling, easy to put on and take off. - Soft High Quality Material: Indoor ac cover are made of high quality soft polyester cloth, washable design, high-quality and durable, Grey could easily matching your home style. - Lowers Heating Costs: Eliminate the need to remove and reinstall A/C unit and reduce energy cost. Grey window AC cover not only could protect the ac unit from dust, but also could keep your room warm in winter, prevent the dust, rain, snow enter to indoor. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B0DGDPT79G | | Best Sellers Rank | #292,365 in Home & Kitchen ( See Top 100 in Home & Kitchen ) #910 in Accessories (Home & Kitchen) | | Brand Name | RUNZEG | | Closure Type | Clip, Snap | | Color | Gray | | Customer Reviews | 4.1 4.1 out of 5 stars (330) | | Item Weight | 0.15 Kilograms | | Manufacturer | RUNZEG | | Material Type | Polyester, Polyester Blend | | Set Name | Single | | Unit Count | 1.0 Count | | Water Resistance Level | Water Resistant | ## Product Details - **Brand:** RUNZEG - **Color:** Gray - **Item Weight:** 0.15 Kilograms - **Material:** Polyester, Polyester Blend - **Water Resistance Level:** Water Resistant ## Images ![Indoor Air Conditioner Cover, 21Lx15Hx3.5D in Gray Window Winter Unit Cover Anti-Rust Adjustable for Window AC with Free Elastic Straps - Image 1](https://m.media-amazon.com/images/I/61lnkHkGy1L.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.us/products/674695689-indoor-air-conditioner-cover-21lx15hx3-5d-in-gray-window-winter](https://www.desertcart.us/products/674695689-indoor-air-conditioner-cover-21lx15hx3-5d-in-gray-window-winter) --- *Product available on Desertcart United States of America* *Store origin: US* *Last updated: 2026-07-12*