The Lennox 27U66 pleated air filter (21208-041625) is a 16x25x4 HVAC replacement filter designed to improve indoor air quality and protect your heating and cooling system. Featuring a MERV 8 efficiency rating, this filter captures a broad range of airborne particles such as dust, pollen, mold spores, and pet dander, helping maintain cleaner air throughout your home or business. The durable pleated media increases surface area for improved particle capture and extended service life compared to standard flat filters. Easy to install, this genuine Lennox filter ensures dependable performance and system protection season after season.

 

Key Features:

• Genuine Lennox replacement air filter compatible with systems requiring 16x25x4 size
• MERV 8 efficiency rating for balanced filtration and airflow
• Pleated media design increases surface area and particle capture
• Helps protect HVAC equipment and maintain indoor air quality
• Easy drop-in installation for routine maintenance