What Furnace Filter To Buy -

A high-end MERV 13 filter that is clogged with dust is worse for your air—and your energy bill—than a clean MERV 8. Experts at Guardian Technologies recommend replacing filters every , or as often as every 30 days during peak heating/cooling seasons or if you have multiple pets.

: The "gold standard," trapping 99.97% of particles down to 0.3 microns. Warning : Most residential systems cannot handle a HEPA filter's air restriction without professional modifications. 4. Tailor to Your Household what furnace filter to buy

: Made of polyester or cotton folds. These have more surface area, allowing them to trap more particles without instantly clogging. A high-end MERV 13 filter that is clogged

Your lifestyle dictates the intensity of filtration you need: Warning : Most residential systems cannot handle a

: Uses static electricity to attract dust like a magnet. These come in disposable or washable versions.

The Minimum Efficiency Reporting Value (MERV) tells you how well a filter traps particles. MERV Rating Large particles (lint, dust) Protecting the furnace motor only. MERV 5–8 Mold spores, hair, pet dander Standard homes with no pets or allergies. MERV 11–13 Smoke, bacteria, smog Homes with pets, smokers, or allergy sufferers. MERV 14–16 Viruses, fine tobacco smoke Highly sensitive individuals or clinics. 3. Choose Your Filter Material

: MERV 13 is excellent for asthma but should be checked for compatibility with your HVAC system’s airflow requirements. Expert Maintenance Tip