We're in Vermont in a house built in 1926. We blew insulation into the walls, insulated the attic well, and replaced the ground floor windows (some day we'll do

We're in Vermont in a house built in 1926. We blew insulation into the walls, insulated the attic well, and replaced the ground floor windows (some day we'll do the rest of the windows; in the meantime we use plastic film in the winter). We heat with pellets primarily, but when the pellet stove starts to struggle we turn on the heat pump we installed a few years ago. It warms up the house in no time.