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About EHPA
The European Heat Pump Association represents the interests of the European heat pump industry.
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About heat pumps
A heat pump is a device that can provide heating, cooling and hot water for residential, commercial and industrial use. Despite the name, all heat pumps can provide both heating and cooling. They work well in nearly all types of climate.
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News and resources
All EHPA's news, media releases, publications and position papers.
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Certification
EHPA aims for quality. Together with its member it tries to show both the end-consumers and policy makers that heat pumps are quality products that are very energy efficient and are using the available renewable energy sources as much as possible.
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Policy
EHPA is the voice of the heat pump sector in the European Union and advocates for a faster deployment of heat pumps. We want EU laws that enable heat pumps to become the number one heating and cooling solution in Europe. Everyone, everywhere should have access to sustainable, affordable heating.
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Events
EHPA members meet at the annual general assembly. EHPA organises the annual conference Heat Pump Forum, and several heat pump related events every year. EHPA co-organises and supports the European Heat Pump Summit in Nuremberg. EHPA is present at major trade fairs in Europe.
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Projects
The projects are in chronological order and show the type of funding received, as well as a link to their respective websites
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Market data
After record growth in 2021, there are now 16.98 million heat pumps in the EU, covering around 14% of the heating market.
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About EHPA
About heat pumps
European Heat Pump Association > About heat pumps
What is a heat pump?
A heat pump is a device that can provide heating, cooling and hot water for residential, commercial and industrial use.
Despite the name, all heat pumps can provide both heating and cooling. They work well in nearly all types of climate.
Heat pumps take energy from the air, ground and water and turn it into heat or cool air.
This works due to what is known as the refrigerant cycle.
How a heat pump works – the ‘refrigerant cycle’
The ‘refrigerant cycle’ has four phases:
evaporation; compression; condensation; expansion.
Evaporation:
A heat pump takes in heat or cold in from the air, water or underground and transforms it into heating or cooling for your building or water.
Sources include ambient air, exhaust air, underground heat, groundwater and water.
The energy from these sources is infinite, meaning it is renewable.
This energy makes up about 80% of the energy needed.
The heat pump captures the heat from the ground, or the air or water. This heat is then used by the heat exchanger, known as the evaporator, to turn the refrigerant in the heat pump into gas.


Compression:
The refrigerant gas then reaches the heart of the heat pump: the compressor. The compressor compresses the refrigerant gas to a high pressure, which leads to a rise in temperature.
Why this works: High pressure heats up gas, just like a bicycle pump that heats up when you are using it.
To drive the compressor, additional energy is needed. This can come from electricity, gas or thermal energy. This makes up about 20% of the total energy needed to run the heat pump. If green electricity is used, for example from solar or wind energy – then the heat pump uses 100% renewables and is carbon neutral.
Condensation:
On the discharge side of the compressor, vapour which is now hot and highly pressurised passes through the second heat exchanger, called the condenser. This heat exchanger allows the refrigerant to release the heat into the heating system for the house. As a result, the refrigerant then turns back from a gas into a liquid state.
The heat coming into the house can do so through an air system, like an air conditioning unit, or a water-based system like floor heating or radiators, known as ‘hydronic’. The indoor unit can also contain a hot water storage tank.


Expansion:
The condensed refrigerant then passes through a pressure-lowering device, known as the expansion valve. The now low-pressure liquid refrigerant can then begin the cycle again.
More on how heat pumps work – EHPA report
The history of heat pumps – the Swiss Federal Office of Energy
Name | Type | Date | Action |
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How do heat pumps work? An overview |
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