How Heat Pumps Work

How Heat Pumps Work

A heat pump is an electrical device that extracts the heat & transfers it from one place to another. Air Conditioners & Refrigerators are the most common examples of this technology. 

Heat Pumps transfer the heat by transmitting a substance called a refrigerant through a cycle of condensation & evaporation. A compressor pumps the refrigerant between the two exchanger coils. In one of the coil, the refrigerant is evaporated at low pressure & absorbs the heat from the surroundings. Then the refrigerant is compressed to the other coil, in which it condenses at high pressure. 

A refrigerator is substantially an insulated box with a heat pump system connected to it. The evaporator detected inside the box, most of the time in the freezer. Heat is soaked from the location & transferred to another behind or beneath the unit where the condenser coil is situated. An air conditioner transfers heat from inside the house to outdoors. Ductless heat pumps are also available for home and are called mini-split heat pump.

Heat Pumps
Heat Pumps

The heat pump is fully fickle, heat pumps can give almost year-round climate control for your home, heating in winter & humid in summer. Since the air always accommodates some heat, a heat pump can give heat to a house even on the cold winter days. An air-source heat pump soaks heat from the outdoor in the winter & flotsam the heat into outdoor air in the summer. Moreover, ground-source also called geothermally, geo-exchange, earth energy, draws the heat from the groundwater and is becoming largely used in some countries.


1. What temperature is a heat pump not effective?

Heat pumps start losing efficiency once the temperature dips to 40 degrees and once the temperature falls to 25 to 30 degrees, it is no longer the most efficient heating option. 

2. How does a heat pump work in winter?

In winters, heat pumps work like an air conditioner in reverse mode. The heat pump absorbs heat from the outside, sometimes down to 20 degrees or even lowers than that and uses it to warm your home. 

3. What are the disadvantages of a heat pump?

Heat pumps have a large upfront cost, these are difficult to install and its sustainability is questionable. Its installation process requires significant work and experience issues while exposed in cold weather. Special planning permissions are required in different countries for its installation.

4. How efficient is a heat pump?

Heat pumps offer an energy-efficient alternative to air conditioners and furnaces for climates with moderate heating and cooling needs. Compared to electric resistance heating, a heat pump can reduce the use of electricity for heating by approximately 50%.

5. Do heat pumps use a lot of electricity?

For every one kW of electricity, a heat pump with a coefficient of performance of three can generate three kW of heat. An average house needs around 12,000 kWh of heat per year. So, to achieve this, 4,000 kW of electricity is used by a heat pump with a CoP of three.

6. Is a heat pump worth the money? 

A heat pump system is equivalent to any air conditioner of nearly the same size when it comes to cooling, but it does not lose any power while working as a heater. This is what makes a heat pump about 3 to 4 times more energy efficient in heating mode than an electric furnace. 

7. Are heat pumps noisy?

In general, heat pumps are not noisy. These are even quieter than fossil fuel boilers. Depending upon the manufacturer and installation, an air source heat pump may reach 40 to 60 decibels, whereas a ground source heat pump may reach 42 decibels.


We have been taught that we should knowledge about everything like indoor & outdoor work. So the information regarding how the heat pumps work provided to you must have clear all the queries. Follow the instructions carefully & surely you’ll be able to learn everything about it. See you in our next blog. 

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