Idealism will be tested on Saturday morning as an Arctic super-freeze is predicted to take our local temperature down to -8 degrees, and we will put our heat pumps to the test. These cold-weather heat pumps are supposed to maintain efficient heating down to -13 degrees. When we converted our home from an oil boiler to make our home 100% fossil fuel free and powered by solar panels, some folks recommend we keep the oil as a backup. We said nope, take it all away. We shall see what happens!