Filtrete 20x25x1 Air Filter, MERV 11, MPR 1000, Allergens and Pet Dander, 3-Month AC and Furnace Filters, Cleaner Air, Reliable Airflow, 6 HVAC Filters, Actual Size 19.68 x 24.68 x 0.81" Yale or fibre-metal hood

or fibre-metal hood

heat pump with auxiliary heat

You can just change the filters more frequently with pretty reasonable cost

DURABLE & WEATHER-READY

affordable electronic test equipment

Filtrete 20x25x1 Air Filter, MERV 11, MPR 1000, Allergens and Pet Dander, 3-Month AC and Furnace Filters, Cleaner Air, Reliable Airflow, 6 HVAC Filters, Actual Size 19.68 x 24.68 x 0.81" Yale or fibre-metal hoodBrand: Filtrete Color: 20x25x1 Features: MAKE YOUR HOME YOUR SANCTUARY: 6 pack of 3 month pleated Filtrete 20x25x1 MERV 11 MPR 1000 AC Furnace Air Filter helps capture unwanted particles from your household air to contribute to a cleaner, fresher home environment EXCLUSIVE TECHNOLOGY: Designed with Filtrete 3 in 1 technology to pull in and trap unwanted particles, allowing cleaner air to flow through (Compared to MERV 11 minimum filter requirements;