Description
The FilterLOCK covers and seals the standard 1” furnace filter slots. The overlapping two-piece design allows for filter slots measuring up to 25” in width. The FilterLOCK is held securely in place by the integral magnetic fasteners. It effectively covers the filter slots situated at the side or top of metal return air ducts. It can be trimmed to fit over various sizes as necessary.
- Saves Energy - Reduces Utility Bills
- Blocks Allergens and Pollutants from Entering Ductwork
- Improves Indoor Air Quality
- Increases Furnace and A/C Lifespan
- Overlapping Design - One-size-fits-all Filters
- Magnetically Attaches to Ductwork - Quick & Easy
- Forms 90° Elbows - Sizes 4"-16"
- Installs on New or Existing Flexible Ducts
- 100% Recycled Material - Made in USA
- Quick and Easy Installation
- Quantity: Case of 12
What Is the FilterLOCK Magnetic Furnace Filter Slot Cover Used For?
The FilterLOCK magnetic furnace filter slot cover is designed to seal the gap around your furnace filter slot, where unfiltered air can sneak into your HVAC system. In many homes, this area is left partially open, allowing dust, allergens, and debris to bypass the filter entirely and circulate through your ductwork. By covering and sealing that opening, the FilterLOCK helps ensure that all incoming air passes through the filter as intended.
It also plays a key role in improving system efficiency. When air leaks around the filter slot, your furnace or air conditioner has to work harder to maintain airflow and temperature. The magnetic cover creates a tighter seal, reducing energy loss and helping your system operate more smoothly.
Beyond performance, it supports better indoor air quality. By blocking contaminants at the source, the FilterLOCK helps reduce the amount of dust and allergens entering your living space. It’s a simple upgrade that can make a noticeable difference in both air cleanliness and overall HVAC performance.
Frequently Asked Questions
What does the FilterLOCK slot seal door cover do?
The FilterLOCK seals gaps around standard 1-inch furnace filter slots, preventing unfiltered air, dust, and allergens from entering your HVAC system.
Will the FilterLOCK fit my furnace filter slot?
Yes, the overlapping two-piece design fits slots up to 25 inches wide and can be trimmed for a more customized fit if needed.
How is the FilterLOCK installed?
Installation is quick and simple using built-in magnetic fasteners that securely attach the cover to metal ductwork without tools.
How does the FilterLOCK improve HVAC performance?
By sealing air leaks, it helps your system run more efficiently, reduces energy waste, improves indoor air quality, and can extend the lifespan of your furnace and air conditioner.
