Ground Source Heat Pump

Also known as earth energy systems, where heat is extracted from the earth through certain liquids, the heat pump then raises the temperature from that liquid. That heat is then used for the indoor setting. This source of heating comes directly from the earth or ground water, and helps develop heat for homes. This type of system can be expensive to install, but requires little maintenance. This system is beneficial because it is energy saving and in places such as Canada where temperatures in winter can be very cold, like -30°C, the groundwater temperatures are typically -2°C to 4°C. Earth energy systems (EES) have a Coefficient of Performance (COP) of 2.5 to 3.8 which means that their input is 2.5 to 3.8 times greater than their input, a measure of their efficiency. An EES installation in southern Canada, such as Ontario, will have an HSPF of 10.7 to 12.8, which is significantly higher than 3.4 which is for electrical-resistance heating which is typically used.  An HSPF is the heating seasonal performance factor, which is another measure of efficiency, specifically with respect to heating and so the higher the number, the better it performs.