I’ve lived in England for years and even though it’s not where I was born, I consider it my home. As it’s the place I like to live, I’m always looking for ways to improve myself and my family here, and one of the ways I do this is looking for sustainable ways of living, and one of them is a source of energy. And still, about the energy sources, I’m looking for heating sources for the winter and the one I liked the most was the air source heat pump s. But what are air source heat pumps?Air source heat pumps are a type of renewable energy technology that takes heat from the outside air (even when it is freezing) and uses it to heat the home. You can get other heat pumps that do the same thing using heat from the ground and water, but air source heat pumps are suitable for a wide range of properties. Because the air (or soil, or water) is heated by the sun, the energy that heat pumps produce is still classified as “renewable,” even if the pump itself is powered by electricity that may or may not come from a renewable source. There are two types of an air-source heat pumps. Air-to-water systems are more common, they heat the water which is then circulated through the house via radiators or an underfloor heating system. They can also be used to heat water in a storage tank for the bathroom or kitchen. Air-to-air systems typically use fans to circulate hot air around the house and cannot be used to heat water. How do they work?Air-source heat pumps use the same type of technology that keeps your refrigerator cool but in reverse. A liquid refrigerant that has a very low boiling point is pumped into a circuit between two heat exchangers. This refrigerant receives thermal energy from the outside ambient air temperature and turns it into a gas as it heats up. This gas is then compressed back into a liquid, which further raises its temperature. The hot coolant then passes through a heat exchanger, which transfers heat to a separate body of water to circulate in the central heating system. During the final stage, the liquid refrigerant passes through an expansion valve reducing pressure and temperature, and the cycle repeats. cost savingsThe typical cost of installing an air source heat pump unit is £6,500 to £10,000 depending on the size of the property that needs to be heated. Also, additional work may be needed to upgrade the heat distribution system, for example, larger radiators to help distribute the heat. Remember, if you want your heat pump to run efficiently, make the fabric first and insulate your home well. Running costs will vary based on the size and insulation levels of your home, the type of distribution system you have, and your desired ambient temperature, as well as the CoP of the system (as mentioned above).