Passive Ventilation is only one piece of an envelope to make a super energy efficient home or building. I built a 3-bed, 2-bath Habitat-for-Humanity-scale house and I cut my monthly HVAC bill to about forty-five dollars a month. Not by magic. Not by solar. Not by spending more money. By fixing the envelope. In the course, I give you: • every performance target I used • every metric I hit • every control layer I solved • every product I chose • and my full cost breakdown, line by line But don’t t

I have heard from several of you lately about building an ADU in the back yard, and some cities are going to potentially allow up to 3 of them. The cities are afraid of you building 3 chicken coops and renting them out. I can’t do this for everyone, but for some small fee I could design one to match the look of your house. Just saying. I have been to one tiny home manufacturer and they heat and cool them with a small MiniSplit. But if you use me, it will be as near to Net Zero as possible. Maybe