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

$9.99

FilterLock is an easy to install, patented two-piece magnetic filter seal system designed for use with 1-inch furnace filters. FilterLock eliminates air leakage in your HVAC system to help reduce utility bills and save energy. FilterLock also improves indoor air quality by blocking allergens, dust, and gases such as carbon monoxide from entering your home. FilterLock filter seals magnetically attach to ductwork to cover any air leaks on the furnace filter slot door. This two-piece design works with any 1-inch furnace filter up to 25 inches long. Universal one-size-fits-all. Approximately 25 x 4.8 x 0.1 inches when both pieces are installed.

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.