Gregory's Server
According to my indoor PurpleAir sensor, what’s in my office is mostly particulates below a couple of μm, clustered between 0.3 and 1 μm. But my MERV 13 air filter isn’t very good at that size any more, letting half of particles pass according to the spec.
I’m failing to find a higher rated air filter, such as MERV 16, that looks even remotely like it is made for consumer / home applications whether in HVAC system or standalone. Does such a thing exist, anybody have one?
@J12t AIUI anything above MERV 13 is likely to harm your air circulation machinery. I don’t understand the details, but it’s something to do with the pressures required to push air through the filters; the pressure drop on the outgoing side isn’t enough to get good circulation, and the higher pressure against the fans will (possibly dramatically) shorten the life of the motors. I’d guess stand-alone filters don’t use MERV ratings because that’s designed for protecting the equipment