--- product_id: 28445485 title: "- FilterLock Furnace Filter Slot Seal – Magnetic Seal Cover for Any 1” Furnace Filter, Up To 25” Long, Reduce HVAC Air Leaks, Green" brand: "allergyzone" price: "19497CFA" currency: XOF in_stock: true category: "Allergy Zone" url: https://www.desertcart.sn/products/28445485-filterlock-furnace-filter-slot-seal-magnetic-seal-cover-for-any store_origin: SN region: Senegal --- # Energy-saving design Patented magnetic seal Stops HVAC air leaks - FilterLock Furnace Filter Slot Seal – Magnetic Seal Cover for Any 1” Furnace Filter, Up To 25” Long, Reduce HVAC Air Leaks, Green **Brand:** allergyzone **Price:** 19497CFA **Availability:** ✅ In Stock ## Summary > 🛠️ Lock in Fresh Air, Lock Out Waste – The Magnetic HVAC Upgrade You Can’t Afford to Miss! ## Quick Answers - **What is this?** - FilterLock Furnace Filter Slot Seal – Magnetic Seal Cover for Any 1” Furnace Filter, Up To 25” Long, Reduce HVAC Air Leaks, Green by allergyzone - **How much does it cost?** 19497CFA with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.sn](https://www.desertcart.sn/products/28445485-filterlock-furnace-filter-slot-seal-magnetic-seal-cover-for-any) ## Best For - allergyzone enthusiasts ## Why This Product - Trusted allergyzone brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Install in a Snap:** Universal fit for any 1” furnace filter up to 25” long with effortless magnetic attachment. - • **Cut Costs, Not Comfort:** Reduces HVAC energy waste, lowering your utility bills while boosting system efficiency. - • **Built to Last, Easy to Use:** Reusable fiberglass design that’s easy on/off for long-term, hassle-free protection. - • **Breathe Cleaner, Live Better:** Blocks allergens, dust, and harmful gases from bypassing your filter for superior indoor air quality. - • **Seal the Deal with Magnetism:** Patented two-piece magnetic system locks in air, eliminating costly leaks. ## Overview The FilterLock Furnace Filter Slot Seal is a patented, magnetic two-piece cover designed to fit any 1” furnace filter up to 25” long. It effectively eliminates air leaks at the filter slot, improving indoor air quality by preventing contaminants from bypassing the filter. This energy-efficient solution reduces HVAC energy consumption and utility bills. Made from durable fiberglass, it offers easy, reusable installation with a universal fit, making it a smart upgrade for any modern HVAC system. ## Description Buy AllergyZone FilterLock Furnace Filter Slot Seal – Magnetic Seal Cover for Any 1” Furnace Filter, Up To 25” Long, Reduce HVAC Air Leaks, Green: Industrial & Scientific - desertcart.com ✓ FREE DELIVERY possible on eligible purchases ## Features - PROTECT YOUR HVAC SYSTEM: FilterLock is a patented two-piece magnetic seal system designed for furnace systems with 1” air filters, eliminating air leakage at the filter slot/door to enhance indoor air quality and reduce energy consumption. - IMPROVE AIR QUALITY: Prevent harmful airborne contaminants such as allergens, dust, and gases like carbon monoxide from entering your HVAC system. Properly sealing the filter slot/door ensures that pollutants don’t bypass the air filter. - ENERGY EFFICIENT: Reduce utility bills and save energy by effectively stopping air leaks in your HVAC system. This not only enhances overall indoor air quality but also addresses one of the four major ductwork issues identified by Energy Star—air leakage at the filter slot. - EASY TO INSTALL: Enjoy hassle-free installation with FilterLock’s universal, one-size-fits-all seal that magnetically attaches to ductwork to cover the furnace filter slot door. This convenient two-piece design is compatible with any 1” furnace filter up to 25” long. - ADDITIONAL FEATURES: Benefit from a reusable, easy on/easy off magnetic design that ensures long-term use. Once both pieces are installed, the seal measures approximately 25 x 4.8 x 0.1 inches, providing a perfect fit for your needs. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B00PKS6MT0 | | Best Sellers Rank | #7,661 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #111 in Furnace Filters | | Brand | AllergyZone | | Brand Name | AllergyZone | | Compatible Material | Metal | | Customer Reviews | 4.4 out of 5 stars 3,212 Reviews | | Global Trade Identification Number | 00855118000257 | | Item Dimensions | 25 x 4.8 x 0.1 inches | | Item Form | Solid | | Item Weight | 0.13 Pounds | | Item dimensions L x W x H | 25 x 4.8 x 0.1 inches | | Manufacturer | AllergyZone, LLC | | Material | Fiberglass | | Material Type | Fiberglass | | Model | AZFL-100 | | Number of Items | 1 | | Part Number | AZFL-100 | | UPC | 855118000257 013964070460 826719862223 | | Unit Count | 1.0 Count | ## Images ![- FilterLock Furnace Filter Slot Seal – Magnetic Seal Cover for Any 1” Furnace Filter, Up To 25” Long, Reduce HVAC Air Leaks, Green - Image 1](https://m.media-amazon.com/images/I/71xdDvfnNtL.jpg) ## Available Options This product comes in different **Size** options. ## Questions & Answers **Q: is this the reason why my furnace smell there is a gap? My furnace is in a small enclose room with drywall carry a little gap.** A: I am not sure exactly where this gap is? A furnace should not smell, at least not that bad. I don't think this product would stop that, but at the price worth a try. My suggestion is to try it & see if it works, but still contact a furnace specialist to make sure your furnace is working correctly. You also did not note if oil or gas fired, or heat pump? A heat pump should not smell at all, anytime! So more checking needs to be done, I think, for your safety. **Q: My furnace filter opening (just wider than the 1 inch filter) is recessed between the furnace and the insulation covered ductwork. Will this work?** A: It uses magnets to hold in place. If your duct is covered in insulation board, the magnets won’t work. They would only stick to the metal of the duct or to the metal furnace enclosure. Probably won’t work for you. **Q: Are furnaces required by health and safety code to have a cover on the filter slot?** A: I don’t think they are required or if they are that depends on the state and city or institution . Although the cleaner the filtered air is , the better quality will be **Q: It’s advertised that each piece is 25” long but I’ve seen some people say that each piece is only “14 can anyone confirm?** A: Each piece is 14" and comes with 2 pieces per package. You can also overlap the pieces on your furnace to fit various sizes. ## Frequently Bought Together - AllergyZone FilterLock Furnace Filter Slot Seal – Magnetic Seal Cover for Any 1” Furnace Filter, Up To 25” Long, Reduce HVAC Air Leaks, Green - Simply 16x25x1 Air Filter, MERV 8, MPR 600, 6 Pack, For Home AC Furnace & HVAC (Actual Size: 15.75"x24.75"x0.75") DUST, Pet, & Allergy Control - Filtrete 16x25x1 AC Furnace Air Filter, MERV 11, MPR 1000, Micro Allergen Defense, 3-Month Pleated 1-Inch Electrostatic Air Cleaning Filter, 2 Pack (Actual Size 15.719 x 24.72 x 0.84 in) --- ## 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.sn/products/28445485-filterlock-furnace-filter-slot-seal-magnetic-seal-cover-for-any](https://www.desertcart.sn/products/28445485-filterlock-furnace-filter-slot-seal-magnetic-seal-cover-for-any) --- *Product available on Desertcart Senegal* *Store origin: SN* *Last updated: 2026-08-28*