DAY 16: Airbnb Solar Harvest home is the last stop on our Tree Tour! Providing 130% of the home’s energy needs, the system feeds extra energy to the grid and, once plug-in electric vehicles become available, will too power the family car!!
Notice the solar thermal panels up top (for hot water! An Al Gore-approvable heating system), the photovoltaic panels (converting sunlight to electricity!), The textbook passive solar overhangs (2′ for 40° N. Latitude that enables collection of winter sun and shade of hot summer sun!), Super-insulating walls windows and ceilings, a south-facing sunroom, and porous pavement!
The home also uses a geothermal heat exchange to heat the home in the winter. We talked R values of the building envelope. There is an impressive ventilation system!
Eric explained the all electric design allowed them to cap their natural gas line, which was of particular importance because of the environmental degradation caused locally by natural gas drilling and distribution. Carbon neutrality efforts extended from structure, to energy supply, and to finishes.
We must retrofit existing buildings! This is the suburban way to an efficient consumer-producing community net-zero electric grid!
(Disclaimer: Due to the variability of electricity source, home appliances and heating systems, I have not been calculating the carbon contribution of the lights, hot water or heating we use in the mornings or at night during the tree tour. We moved around too often, slept on too many couches, with too many end uses for those calculations to be feasible.) Happy our last two days of “building envelope energy” will be carbon neutral!
We have burned 7 gallons of gas since arriving in the Bolder/Fort Collins area 4 days ago adding 133 pounds to my carbon footprint! My total carbon footprint is 1.356 tons!