Opt for a Filtrete allergen defense air filter to transform your central heating and cooling system into a whole-home air filtration operation. This no-nonsense filter helps capture varying sizes of particles, from the large (lint, pollen, dust and pet dander) to the microscopic (smoke and smog).

• Outperforms fiberglass, washable and non-electrostatic three month pleated 1 in home air filters for your furnace, air conditioner or HVAC system
• Exclusive filtrete brand 3-in-1 technology from 3M traps unwanted air particles, letting cleaner air flow through
• 4 in slim fit and 5 in air filters
• The higher the MPR, the more micro particles such as pollen, pet dander, smoke, bacteria and viruses, your filter will capture from the air passing through it
• A dirty filter will slow down air flow and make the system work harder to keep you warm or cool wasting energy