renewable guy wrote:
From what I have read of your education, you have come quite a ways
yeah, my education is 90% interest and reading, 5% HVAC and heat pump workshop courses, and 5% post secondary in industrial instrumentation (mostly control systems for the energy industry) and a few university courses (mostly chemistry is the only stuff I revisit)
renewable guy wrote:
I'm with Illinois Renewable Energy Association and we had on display the 1 watt house. It's only [supposed to lose 1 watt/ft^2] I assume per hour. The walls were one foot thick with foam insulation.
It is actually one of the three minimum requirements of a PassivHaus certified building. Specifically it is the average flow of heat through the walls, roof, and foundation over the year over the surface area of the house (walls, roof, and foundation). (note I corrected your words from 1 watt/m*2... it is listed as 10 watt/m^2 which is close to the 1 watt/ft^2). The rest of the heat/cool losses are air leaks so the other two requirements for PassiveHaus design are 15kW hrs / m^2 per year total heating and cooling energy use (the area in this is livable floor space) and a different total energy use (includes appliances, electronics and lighting). "1 watt house" sounds more impressive then saying "PassivHaus certified".
Edit: I found a document for "1-watt house" standards and they do have a total energy requirement too (10 kWhr / ft^2 per year) but note that is more then 7 times as much as PassivHaus's 15 kWhr/ m^2 per year. Also note that 1 W/ft^2 = 10.76 W/m^2 so it is slightly laxer their too http://www.affordablecomfort.org/images/Events/22/Courses/844/MAM17_Spiegel_sec.pdf
PassivHaus saves about 85% over a new building-code-compliant building but I want to go further and cover the last 15% with better heat exchangers (heat-recovery ventilation units) and even more air-tightness. Less window area and active solar can also make the house go beyond the 1-watt house. The reason why I want to go this far is to get zero-energy house retrofits possible. Very few homes in cities have the options of passive solar (unshaded south facing windows and high thermal mass) so retrofits have to assume only the roof will get any decent sunlight... the windows are just for daylighting to reduce electric lighting needs (and building codes). Why go zero? I am an anarchist with a mission to legally pay close to zero taxes. No expenses like food and utilities mean people can work less (less income tax) and spend less (less sales tax). Making communities without distributed utilities will be the next step to reduce land taxes.