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[Costco] COSTCO: 3M - Filtrete Furnace Filters, 6-pack 79.99 delivered

  • Last Updated:
  • Apr 29th, 2019 11:03 pm
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Feb 23, 2005
2144 posts
tew wrote: Like you said the really cheap ones don't catch much and the dense ones are very hard on your system. I use MERV 6 which are better that the cheap fibreglass ones. They stop a fair amount but don't restrict the air flow very much. The very dense filters are so expense and shorten the life of your vac system. The manufacturers tell you they are better because they make a much larger profit on them. Listen to the HVAC installers, repair and maintenance people and get the less restrictive filters.
agreed. i got code 33 on a carrier furnace. my neighbour's friend is a HVAC guy, he texted him asking what to do, his reply was " LOL, Change filter, restart" From his reply, u can see how common the filter causes problems.
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Jan 19, 2008
1301 posts
If using too high a MERV is bad for your furnace, why not go commando and not use any filter, right. Great air flow right?. I like the 1500 Filtrite, I think that its the people that forget to change their filter, and it clogs with dust that causes the problem, not the higher MERV ratings.