I wonder if it just gets built into health/building codes. I don't want to ask every business to do X and yet I hope sometimes regulators do. I think the chall

I wonder if it just gets built into health/building codes. I don't want to ask every business to do X and yet I hope sometimes regulators do. I think the challenge with indoor air circulation is the energy required to do so, especially when heating/cooling of the air is involved. But, I'd sure love better indoor air quality.