Are filtrete filters bad?
November 21, 2007 5:44 AM Subscribe
Do 3M Filtrete furnace filters put a strain on the blower motor? I've heard this from more than one HVAC technician. Some techs like the cheapo 50 cent filters. Why is that? Do they see a lot of failed motors due to insufficient air flow? I would think a well run company like 3M would know how to design a proper filter.