Improving air quality

[superflyer]

I am wondering what types can be done to make the best air quality for pigeons and people.

[Therc30guy]

I have a small HEPA filter in each loft. I originally put them in the loft to get better air circulation, it's hot here in Phoenix. I do not know how much good they are doing the quality of the air, but they are the same type filter that I use in my home.
They require electricity to run but are very low wattage. You can get them at any Target, Home Depot, Ace Hardware etc. etc. etc.
I have no way to actually test air quality, I can only give anecdotal observation. I think it is helping, kind of like I think ACV in the drinking water is good for their health.
John

[Libis]

I love my Honeywell 50250 HEPA air filter. I keep it in my bedroom and it helps my allergies so much!