Filter-Monster FilterLock Furnace Filter Slot Seal, AZ-FL

$9.99

FilterLock® is a patented two-piece system designed for use with 1-inch air filters. It eliminates air leakage at the filter slot/door to improve indoor air quality and reduce energy consumption.

Features:

Cover furnace filter slot/door
Block allergens and other contaminants from entering home including deadly gases like carbon monoxide and radon
Improve indoor air quality
Reduce energy consumption
Magnetically attaches to the duct work
Two-piece design works with any 1” filter up to 25” long
Universal one size fits all
Indefinitely reusable
Easy to install

What You Get:

Two (2) magnetic pieces per package

Additional Information:

Product Dimensions: 25 x 4.8 x 0.1 inches, 2.08 ounces

Based on 92 reviews Write a review

Five Stars

It really stops air leakage into furnace.

Worked as planned

This worked as planned. I have no issues with the item. It does keep the air from escaping out of the slot which allows for more efficient air flow into the duct system. No wasteful air in the basement.

Easy to install and it works!

The furnace maintenance guy told me to get this and Im glad I did. It works very well. The design makes it easy to stay in place which is due to the flexibility of the product as well as the magnetized ends. There are 2 pieces in the package - which is good depending on your furnace setup. In my case, I needed both.

Consistent Product

I had to buy 2 to fit but it is still a great product.

Works well, but possible production defect

This is my second time purchasing this product after it being recommended after I had an energy audit done on my first home. The product works, but beware of potential defects as the pair I received this time around did not have the end magnets sealed properly as shown in the attached photos.