[teruakohatu]

That I'd very interesting. Is ther data on how much C02 is consumed by lettece?

[elif]

From my calculations I was only expecting about an 80ppm difference, but in practice overnight when the humans and animals are in bedrooms, the living room with plants shoots down to 400 while before it would get about 550 in my leaky old house.

[londons_explore]

You need to approximately grow as many kg of plants each day as you eat food each day.

That's a lot of plants. Possible, but your house will feel more like a rainforest.

[elif]

I run 2 dehumidifiers on top of air conditioning and stay under 60% (almost always under 54%).

Also the hydroponics water the roots of the plants in a closed system so very little of the moisture is evaporated.

Also I'm not sure about your calculation since poop. I would imagine it would be kg consumed - 0.45*kg pooped - house leakiness loss