---
product_id: 28445485
title: "AllergyZone 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: "147 Lei"
currency: RON
in_stock: true
url: https://www.desertcart.ro/products/28445485-allergyzone-filterlock-furnace-filter-slot-seal-magnetic-seal-cover-any
store_origin: RO
region: Romania
---

# Energy efficient Magnetic seal system Improves air quality AllergyZone 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:** 147 Lei
**Availability:** ✅ In Stock

## Summary

> 🔧 Seal the air, save the planet!

## Quick Answers

- **What is this?** AllergyZone 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?** 147 Lei with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.ro](https://www.desertcart.ro/products/28445485-allergyzone-filterlock-furnace-filter-slot-seal-magnetic-seal-cover-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

- • **Save Green:** Reduce utility bills with energy-efficient sealing.
- • **Breathe Easy:** Prevent allergens and harmful gases from entering your HVAC system.
- • **Seal the Deal:** Eliminate air leaks and enhance indoor air quality.
- • **Universal Fit:** One-size-fits-all design for hassle-free installation.
- • **Long-lasting Performance:** Reusable magnetic design for enduring effectiveness.

## Overview

The FilterLock Furnace Filter Slot Seal is a patented magnetic seal cover designed for 1” furnace filters up to 25” long. It effectively eliminates air leaks, enhancing indoor air quality and reducing energy consumption. Easy to install and reusable, this innovative solution addresses air leakage issues identified by Energy Star, ensuring a cleaner and more efficient HVAC system.

## Description

FilterLock Furnace Filter Slot Seal – Magnetic Seal Cover for Any 1” Furnace Filter, Up To 25” Long, Reduce HVAC Air Leaks, Green

## 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.

## Images

![AllergyZone 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)

## 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)

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**Shop now:** [https://www.desertcart.ro/products/28445485-allergyzone-filterlock-furnace-filter-slot-seal-magnetic-seal-cover-any](https://www.desertcart.ro/products/28445485-allergyzone-filterlock-furnace-filter-slot-seal-magnetic-seal-cover-any)

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*Product available on Desertcart Romania*
*Store origin: RO*
*Last updated: 2026-02-13*