4-Pack 20x25x1 Fiberglass Air Filter MERV 1 for HVAC Furnace AC | UL Class 2 Nested Disposable Panel Filter, Low

Key features

• HVAC Equipment Protection：Shields furnaces and central air conditioners from dust and debris without restricting airflow, preventing unnecessary strain and extending system lifespan.
• Continuous Filament Spun Glass Media：Made with durable continuous filament spun glass filtering medium, delivering reliable standard-grade performance as a disposable panel filter for residential use.
• UL Class 2 Certified Safety：Meets UL Class 2 safety standards, featuring a self-retaining spun glass media bonded to a heavy one-piece frame to prevent corner separation.
• Energy Efficient High Airflow：Low initial pressure drop promotes peak energy efficiency—change monthly during high-use periods to keep your heating and cooling equipment running optimally.
• Nested Storage & Monthly Replacement：Space-saving nested construction for compact storage; each filter provides up to 30 days of protection, making monthly replacement quick and convenient.

This is a standard grade furnace filter of the same type that has been protecting furnaces and central air conditioners around the world for over 50 years. The filtering medium is continuous filament spun glass. For peak equipment protection and energy efficiency, these filters should be changed monthly in periods of high use.

Free shipping included. 30-day hassle-free returns.