I was thinking of how would be the best to heat an cool a house and the air filtration while trying to be carbon neutral. With a lot of inside plants being said to be good to help clean the air would it be beneficial to circulate air through a greenhouse to filter it and increase oxygen levels in the house. My thought was the carbon dioxide produced from animal would help feed the plants that produced the oxygen for animals.


The flow of air would go from the intake in the house to the greenhouse, to a geo thermal heating cooling, through an air filter back into the house.


My thought is the geo thermal would help to cool and heat the greenhouse during summer and winter.

That sounds like a great idea for geothermal hotspots. You might even consider going a step further, using geothermal to accelerate growth through enhanced temperatures and humidity control as well. If you plan to keep the resulting plant matter for a long time (e.g. as lumber for houses/cabins) your greenhouse might also help with carbon capture.

There's a movie (available on Youtube: "How Geothermal Energy Revolutionized Iceland's Greenhouses") that seems to validate your recommendation (especially starting ~4:50):