Yup, this turned out to be a crucial consideration that makes the whole project look a lot less worthwhile. If ventilation at a bad temperature is available, it’s cheaper to just get a heat exchanger and ventilate away and eat the increased heating costs during winter than to do a CO2 stripper.
There’s still a remaining use case for rooms without windows that aren’t amenable to just feeding an air duct outside, but that’s a lot more niche than my original expectations. Gonna edit the original post now.
Yup, this turned out to be a crucial consideration that makes the whole project look a lot less worthwhile. If ventilation at a bad temperature is available, it’s cheaper to just get a heat exchanger and ventilate away and eat the increased heating costs during winter than to do a CO2 stripper.
There’s still a remaining use case for rooms without windows that aren’t amenable to just feeding an air duct outside, but that’s a lot more niche than my original expectations. Gonna edit the original post now.