01-03-2024, 11:20 AM
(01-03-2024, 09:31 AM)panamaniac Wrote: VIA trains blend recirculated and fresh air, passed through MERV 13 filters, based on what I've seen on-line.
Interesting. MERV 13 is not nothing, but the bigger question I have is what is wrong with the system if CO2 is still going really high (I haven't personally measured this mind you). If it was blending significant fresh air, the CO2 would stay reasonably low. My guess is that the amount of fresh air is a configurable parameter, possibly even depending on outdoor conditions.