Are we able to circumvent entire air interventions of complex solutions?
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I would like to skip ahead of all the partial multilegged all-in-series less-than-perfect energy performances. (ERV)
What if you just cleaned the hell out of the existing air with no interchange with outside air?
Think of last year when we had multiple smoke-induced days of bad air.
Think of china and india trade nukes and we have air borne radiation-Â the sealed house now affects our health. I’m not a prepper–but believe in being prepared. Some countries have implemented special provisions for their populations.
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Ya just buy a co2 scrubber…
How excited do people get about recycling all their water?
As unappealing as external pollutants can be, internal pollution--respiration, off-gassing & unwanted biologicals are probably a more common concern. The classic solution to pollution is dilution, depending on what you can afford to filter out of the exchange, this is more likely the more simple path to high indoor air quality.
The houses we build to be comfortable in are also appealing to all manner of living things, many of which we don't want to live with. Neither making a home impenetrable or inhospitable to smaller life is particularly realistic, so we pick a middle path of admitting few and expelling many of the things we don't want. Living unprotected or "totally protected" are not actually possible.
Underground bunkers still bring in fresh air because it's easier to filter nuclear material than to remove carbon dioxide from air. HEPA filters were designed for filtering nuclear particulate matter and reactors utilize HEPA and activated carbon.
https://www.hsph.harvard.edu/ecpe/air-cleaning-systems-nuclear-power/