WHAT IS A HEAT PUMP?
A heat pump is an energy-efficient heat source that uses the energy from the ambient air (your garden) or ground outside your property for heating and hot water. By using the energy from the outside or the ground and transferring this heat into the house through a wet system, such as underfloor heating or radiators, a heat pump requires less power input and so is more efficient than conventional boilers.
HOW DOES IT WORK?
A heat pump is essentially a big fridge or freezer. If we look at what your fridge or freezer in detail, it uses a refrigerant inside the pipework to suck the heat out of your food. The compressor or refrigerant pump moves the refrigerant around the system so that it can take all the heat and throw it away using a coil on the back of the fridge. Your freezer is using the heat in your food to heat the kitchen. In essence, it is a food to kitchen heat pump. For every 1 kWh of energy input, a heat pump can deliver up to more than 4 kWh in energy output.
This is an energy efficiency ratio of more than 400%, which is far superior to high energy efficient boiler systems. Since conventional boiler systems can only reach an efficiency ratio of up to 95%, they consume more energy than they can ever deliver.