3M is known for its innovations in many areas, including furnace filters. Not only are their products easily affordable for most homeowners, but they have been found in independent testing to be among the best, even when compared to significantly more expensive systems. Their furnace filters range in price from a few to $20, and they can be bought at many locations.
Five models provide varying levels of filtration, from basic coverage to allergy furnace filters . An online quiz at the company's website advises consumers what filter would be best for them based on living conditions and personal health.
3M's Filtrete line goes beyond the usual MERV efficiency rating by focusing on a filter's ability to capture particles between .3 and 1 micron. This is known as the Micro-particle Performance Rating (MPR). The higher the MPR, the better.
All Filtrete filters
All filters in 3M's Filtrete line:
Filtrete Ultra Allergen Filter
Designed for allergy sufferers, this filter:
Filtrete Allergen Filter
Filtrete Micro Allergen Filter
Also for allergy sufferers, this filter:
Filtrete Micro Particle Filter
Designed for basic home coverage, this filter:
Filtrete Dust and Pollen Filter
This basic 3M filter:
Since furnace filters need air blowing through them continuously to work their best, costs could be added if you don't have a high-efficiency furnace fan. With Filtrete, you can also purchase a stand-alone unit to use the filters in.