[antisceptic]

Did the author stop and wonder why CO2 was important other than some product manual saying so? CO2, in the blood, has a protective role against reactive oxygen species. Oxygen is itself damaging! You don't need to be artificially enhanced by way of superior atmospheric conditions after 9pm when you should instead be getting ready to sleep.

On top of that, if someone really cared about making their body utilize O2 better they would be outside doing hill repeats to improve their VO2max. Worrying about carbon dioxide being a hindrance is silly, because having perfect air doesn't by itself make your lungs bring O2 into the bloodstream better.

If someone is buying an air quality monitor for life extension purposes they should find one that detects PM2.5 and PM10, and figure out how never to breathe that stuff, daggers for the alveoli.

Furthermore, filtering the air doesn't magically reduce CO2. That's stupid. If the author really wanted to reduce CO2, they would have bought 20 plants and placed them around their house.

[gibolt]

IIRC, it takes 7 full-sized trees to match the CO2 output of 1 human. Plants could help somewhat, but unfortunately probably couldn't even offset a cat.

[flippinburgers]

Plants produce co2 at night.

[cinntaile]

On top of that, 20 plants won't reduce the CO2 in any meaningful way. You need a lot more of them. An order of magnitude more.

[antisceptic]

Maybe you're right that 20 plants wouldn't be enough help, but growing a plant is a real method of replacing CO2 with O2. Running a box fan with a filter taped on it isn't. That was my point.