What Makes a Building Product Green
As building occupants, we ask a lot of both our windows and our doors. To name just a few, we want them to let light through but not let the heat out, keep bugs out but kids and pets in, look nice from the inside and outside, and last through decades of hard weather.
GreenSpec offers detailed guidance on window and door selection. GreenSpec also lists other trustworthy and useful sources of information on windows and doors, that are gathered here. Be wary of trade associations that might advocate for one solution above all others—a balanced perspective from several sources is usually more helpful.
While a heat-pump water heater will save significant energy on a year-round basis, be aware that in a cold climate the net performance (water heating plus space heating) will drop in the winter.
Why we opted for electric water heating over a solar water heater
As we build more energy-efficient houses, particularly when we go to extremes with insulation and air tightness, as with Passive House...