seems like a much more reasonable approach. In fact, the CDC (iirc) just released a warning about long term, habitual use of an N95 as your CO2 levels rise significantly. In fact, any time that a person is at risk of death from limited air availability (submarines, space flight, etc), you won't run out of oxygen before the CO2 build up kills you.
Don't get me wrong, if you go to the mall or whatever to get oxygen treatment, I'm sure you'll be fine. It's not super concentrated and you're only on it for an hour. Different beast than an oxygen concentrator long term.
With the CO2 scrubber, you might be fighting a bit of a losing battle with it if you have a whole house air exchanger, but that seems like a cheaper/easier solution to keeping CO2 in sync with ambient environment. A whole house air exchanger is also a fantastic way to mitigate radon (mostly a midwest issue, but is a problem in central eastern states and appalachia) and your radon is borderline between safe and unsafe. I have such an air exchanger, a radon monitor, and no radon mitigation. When the air is particularly cold, sometimes I'll turn off my air exchanger and my radon levels go from 3pCi/L to 4.0-4.5 (4 is usually when they recommend you get mitigation system. If it is borderline like that you can get a passive system that exposes your sump well to ambient environment. And at higher levels you should get an active one where a fan will draw vacuum on your sump 24/7)
Don't get me wrong, if you go to the mall or whatever to get oxygen treatment, I'm sure you'll be fine. It's not super concentrated and you're only on it for an hour. Different beast than an oxygen concentrator long term.
With the CO2 scrubber, you might be fighting a bit of a losing battle with it if you have a whole house air exchanger, but that seems like a cheaper/easier solution to keeping CO2 in sync with ambient environment. A whole house air exchanger is also a fantastic way to mitigate radon (mostly a midwest issue, but is a problem in central eastern states and appalachia) and your radon is borderline between safe and unsafe. I have such an air exchanger, a radon monitor, and no radon mitigation. When the air is particularly cold, sometimes I'll turn off my air exchanger and my radon levels go from 3pCi/L to 4.0-4.5 (4 is usually when they recommend you get mitigation system. If it is borderline like that you can get a passive system that exposes your sump well to ambient environment. And at higher levels you should get an active one where a fan will draw vacuum on your sump 24/7)