[_yb2s]

This is really cool! I try to keep CO2 at reasonable levels at home, and that occasionally results in running the heater with the windows open. My friends/family do not understand why I care or would waste energy like that, and seem to think it is a mental illness or something.

The worst scenario is during high wildfire smoke events... trying to keep the house sealed enough to keep the smoke out often requires taping door seams, etc. and the CO2 skyrockets.

[willlma]

I guess increasing atmospheric CO² by maximizing your fossil fuel usage is one way to equalize the interior and exterior CO² of your house...

[_yb2s]

It's actually pretty minimal- I live in a mild climate, and even doing this sometimes I probably spend under $50/year on home heating and leave the windows cracked most of the time.

My home was most likely 'retrofit' in the '90s to make it airtight for efficiency, and even with the windows cracked is too airtight to be healthy, and still more so than it was probably designed for in the ~1950s.