Mine is built with a passive solar eaves so I'm a month away from no direct sunlight So I didn't need the separated greenhouse on the upper level (terraced levels) I put in vent tubes but have yet to need them never gets aove 80 even with the skylights closed Definitely thinking about separating my lower greenhouse like that for a winter buffer will decide after the first winter completely closed up Do appreciate your progress and updates Looking good!!
@@Offgridgoat you're correct. That's what geothermal air tube "can" do if used right. But the guy in the video doesn't have a clue. Plus he's got the physics of it back asswards. Not enough depth to reach stable temps or length to allow earth to stabilizer air temps. Since heat rises you need a solar chimney that will create a vacuum in the house that pulls the hot outside air thru the tubes, cools it to ground temp and delivers it to the living area. First one I built back in the 80s didn't work with a couple of 50 ft long 4 in pipes 3ft under ground. It may have helped a little. Next one I built about 10 years ago I pull in a solar chimney, eight 8 inch tubes 200ft long. Ground temp here is between 67-70 year round and that's what it keeps my 900sf house at. But I also have a basement that helps to keep the temps pretty stable. Even when it's 100° outside it's about 70 inside. When it's 20°outside it's about 65-70. If it gets in the low teens I have had to pull in a small electric heater in the bathroom. But other than hot water and fridge there's no electric bill since getting a solar LED light system.
