My spouse and I were taking into consideration buying a heat pump source for our heating needs. We will do a great deal of research before we even tentatively decide on which direction to go, although I have found some undoubtedly interesting facts about heat pumps in general. Yes, they are extremely cost efficient when it comes to heating a property. According to the sites online, the heat pump exchanges the heat that is present in your natural environment and it exchanges the heat for the cold. One of the largest problems is the condensation that is formed by the heat pump. There is the ever present uncertainty of ice forming and causing slippery conditions around the appliance. The other concern is if you live in an space that has temperatures below 8 degrees fahrenheit. It is essential to have a backup heat source to keep your property warm. You are putting the heat pump component at risk of working too hard, and burning up the elements. You also need to be aware of the dimensions of your home, and the site also suggests that you get a heat pump that is in excess of the advocated minimal btu rate, and look for an even higher btu rate if you do have temperatures that are frequently lower than 8 degrees fahrenheit. We have often seen temperatures that are sub zero, and the same article was talking about a certain area that sees negative 22 degrees very often. At this point we would need to have an alternative heat source for the property, because it would not be safe for the heat pump appliance, nor would it perform very well. I believe we will need to do a lot more research for a new heating appliance, before we consider buying one.