[throw0101c]

> * Air needs to move and be replenished with air from the outside. Filters/UV/etc are just a bonus.*

Outside air needs to be filtered otherwise you can bring in pollen and other things (e.g., exhaust/brake dust from cars if near heavy arteries). Avoid UV for residences:

* https://www.youtube.com/watch?v=xLwHmfdwO9s

[lazide]

Or for anyone on the west coast the last 5 years, nasty smoke.

[throw0101c]

Carbon filters on your incoming air supply (e.g., ERV):

* https://shop.aprilaire.com/search?q=Carbon+Air+Filter

[lazide]

1) broken link 2) any (actual) HEPA filter works too.

A lot of stuff sold as HEPA doesn’t meet the original HEPA standards though, so needs to be actually rated for the super small particles.

[wahnfrieden]

Toronto also