[losvedir]

In another comment I mention how overwhelmed I am by all this stuff, so maybe don't take it from me, but when I've been searching for answers about stuff like best practices for windows or replacing my furnace with a heat pump, greenbuildingadvisor.com seems to come up a lot and seems pretty good. That said, much of it is behind a paywall that's quite expensive, and I've been waiting to save my free trial for the optimal moment.