[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