COP (Coefficient of Performance) COP is defined as the relationship between the power (kW) that is drawn out of the heat pump as cooling or heat, and the power (kW) that is supplied to the compressor. For example: A given heat pump used for air cooling has a COP = 2.

Compare Heat Pump and Refrigerator. All the components of the heat pumps are same as the refrigerator and even they perform the similar functions; the only difference is that in the heat pumps the components work in a reverse manner. The heat pump is the reverse refrigerator.

Heat engines extract heat from a high temperature source, convert a part of it into work and reject the remaining to a low temperature sink. The opposite happens with a heat pump. When user supplies work to a pump, it extracts heat from the low temperature source and pumps it to the high temperature source.

Example: A partially insulated lounge, 4m x 5m x 2.4m high + 10% for lack of insulation = 53 cubic metres room volume (rounded up). Multiply by 44watts = 2332, now by 1.5 because it’s a lounge = 3498 watts. This means you will need a 3.5kW heat pump.

The HSPF is calculated by taking the total heating required during the heating season, in British thermal units (BTUs), and dividing it by the total electricity consumed during the same time period.

What is considered a good HSPF rating? Generally, you should look for heat pumps with a HSPF rating of between 8 and 10. However, for a heat pump to have the ENERGY STAR label, it must also have a Seasonal Energy Efficiency Ratio (SEER) rating of 12 or greater.

Heat pumps do not operate as efficiently when temperatures drop to between 25 and 40 degrees Fahrenheit for most systems. A heat pump works best when the temperature is above 40. Once outdoor temperatures drop to 40 degrees, heat pumps start losing efficiency, and they consume more energy to do their jobs.

Model Options: Carrier was the first to offer variable-capacity heat pumps. The 21.5 SEER, 13 HSPF Greenspeed model has the highest HSPF rating of any. In all, 10 models starting at 14 SEER are available. This includes compact models.

Average cost: $3,875 – $10,000 A new heat pump can cost between $3,875 to $7,625 depending on the size of your home, energy efficient ratings, brand name, and the type of heat pump you install. A mini split ductless heat pump with 4 multi zone indoor air handler units could cost up to $10,000 to install.

Installed and run properly with an energy efficient home, heat pumps can offer great comfort – and reduce heating costs. And making homes more energy efficient is as critical to the UK’s decarbonisation strategy as replacing gas boilers and investing in renewable energy.