[bcarrell]

> Add insulation. If your house was built in 1960, was it retrofitted with wall insulation? Put more into the ceiling.

Walls were stripped to the studs approx. 8-10 years ago and new fiberglass insulation installed at that point. Attic has (rough) batt insulation, but I suspect it could be better there. Air handler for the air conditioning system is also in the attic due to, I suspect, no other viable option for the design. Probably some loss there.

> Investigate heat pumps (ground loop for up there) for both hot air and hot water. Solar hot water might be viable. In the US, the tax breaks make solar power a gimme if you have the money.

I'll take a look, thanks. I'll note that I have ductwork for the air conditioning system but the (separate) heating system uses baseboard. Unfortunately, the finished basement doesn't have ductwork installed.

[_archon_]

You may find some cheap, easy gains by adding thermostatically controlled fans to your attic's soffet vents. It can get very hot in an attic on hot, sunny days, even if the floors below are held in comfort by A/C. Forcing the (hot but not nearly as hot as attic air) fresh outside air in (especially during the cool night, then idling during the day) can reduce the work your A/C has to do.