View Single Post
Old 05-06-2022, 10:09 AM   #9 (permalink)
Piotrsko
Somewhat crazed
 
Piotrsko's Avatar
 
Join Date: Sep 2013
Location: 1826 miles WSW of Normal
Posts: 4,043
Thanks: 462
Thanked 1,104 Times in 974 Posts
That's the only way I can buy my new house filters in the industrial 20 x 25 x 4" size they are. Currently run merv 12, in July I can install the 13, can custom make a 16 but it is only good for one month before it clogs. The twelve actually stops kitchen odors from spreading through the house and cleared the tahoe fire smoke. Wonder if there are differences in ratings?

N99 filters 99% of particles 1 micron or larger. Useless on smaller particles like covid.
__________________
casual notes from the underground:There are some "experts" out there that in reality don't have a clue as to what they are doing.
  Reply With Quote
The Following User Says Thank You to Piotrsko For This Useful Post:
freebeard (05-06-2022)