An air-to-air heat pump can provide a more efficient alternative for heating a home, particularly in regions of Alaska with less dramatic temperature swings like Southeast. Because they run off of electricity, they can also reduce greenhouse gas emissions in communities that use renewable alternatives like hydropower or solar. (Photo by Erin McKinstry/KCAW) Kake resident Adam Davis decided to convert to a heat pump about four years ago. Before that, he was using a pellet stove, but barging in fuel was getting expensive. When Tlingit-Haida Regional Housing Authority offered to install a heat pump for free as part of a pilot program, it piqued his curiosity.