A fresh air intake does exactly what you’d expect: It brings fresh air into your home from outside. ... Alternatively, if your HVAC system has a “recirculate” mode, turn that on.

If you have a fresh air system, turn it off until the smoke is cleared since it will draw in the polluted air from outside. Turn it back to on after the smoke has subsided.

I do not feel comfortable leaving the door slightly open, so I looked into other options. I found that some people install fresh air supply systems or use air conditioners with built-in fresh air ...

“Our family sleeps in a fully sealed bedroom, and I have heard this could affect our health, so I am considering installing a fresh air supply system or replacing our air conditioner with one that ...