How the heat pump works - simply explained

How the heat pump works - simply explained

©Bild: envato.com

The heat pump is one of the most efficient and environmentally friendly heating systems of our time. It uses the energy stored in the environment and converts it into heat for your home. But how exactly does it work? In this article, you'll find out everything you need to know about how a heat pump works - explained simply and to the point.

What is a heat pump and how does it work?

Find out everything you need to know about the definition, functionality, benefits and cost-effectiveness of a heat pump below.

Definition

A heat pump is a heating system that absorbs thermal energy from the environment (air, water or earth) and makes it usable for heating, hot water and sometimes even cooling through a technical process.

How it works in 4 steps:

1. energy absorption from the environment
The heat pump extracts energy from the environment:

  • Air source heat pump: Takes heat from the ambient air.
  • Ground source heat pump: Uses the energy stored in the ground.
  • Water heat pump: Taps energy from groundwater or other water sources.

Would you like to find out more about the different types of heat pumps? Then click here and discover all the details.

2. compression of the refrigerant
The refrigerant in the heat pump absorbs the energy and evaporates. A compressor then increases the pressure, which heats the gas to a high temperature.

3. energy transfer to the heating system
The recovered heat is transferred to the heating system. The refrigerant condenses and becomes liquid again.

4. cycle starts again
The cooled refrigerant flows back and starts the process again. In this way, heat is continuously generated.

We have prepared an infographic for you here to illustrate how it works even more clearly:

Infografik: So arbeitet eine Wärmepumpe | Statista You can find more infographics at Statista

Advantages

Um dir einen besseren Überblick zu bieten, haben wir die Vorteile der Wärmepumpe kompakt zusammengefasst:

Advantage Description
Eco-friendly Uses renewable energy, reduces CO₂ emissions
Low operating costs Low operating costs Cost-effective compared to fossil heating systems
Versatility Heating, cooling and hot water preparation in one
Subsidies available Government grants make the purchase easier

 

Tip: In Austria, you can apply for the “out of oil and gas” subsidy until 31.12.2025. You can find more information here.

Profitability and amortization.

Is a heat pump financially worthwhile? Although heat pumps are more expensive to purchase than fossil fuel heating systems, they offer low operating costs. Thanks to the savings in energy costs, the investment usually pays for itself in just a few years.

Heating and earning money? The Bitcoin heating system from 21energy makes it possible!

Would you like to not only heat sustainably, but also earn money at the same time? Then the Bitcoin heating system from 21energy could be a clever alternative to a heat pump for you. This innovative technology uses the waste heat from high-performance computers that mine Bitcoin and converts it into usable heat for your home.

Ofen 2 in a nutshell

More warmth, more bitcoin, & zero compromise.
Ofen 2 Front

Ofen 2

New
1,000 W
Power
50 m²
Area heated
32 dB
Noise level
up to 35 TH/s
Mining power
€ 0.10 / kWh
Bitcoin reward
(1-year average)
As of 06.2025
€ 0.22 / kWh
Bitcoin reward
(4-year average)
As of 06.2025
90 x 32 x 14 cm
Size
24 kg
Weight
€1.650,00
-21%
€2.090,00
incl. VAT & shipping
Buy now
Free shipping
30-day-return
Made in Austria

Want to know how much you can save with Bitcoin heating compared to conventional heating systems? Use our profitability calculator and discover your potential savings.

Calculate your annual heating savings

Electr. costs (/kWh)
-
0.26
+
80
Variable electricity price
By using a variable electricity provider on the spot market in combination with the 21energy app, you can reduce your electricity costs by up to 50%.
PV system
In summer, it is possible to monetize surplus electricity from a PV system, if one is available. The value is a rough estimate based on conventional data.
Heat pump
Heat pump
- € 1.400
/ Year
Gas & Oil
Gas & Oil
- € 2,800
/ Year
Electric
Electric
- € 4,160
/ Year
Bitcoin heater
Bitcoin heater
- € 4,160
/ Year
+ € 4,580
/ Year
Average heating cost savings per year. *
€ 4,372
Additional profit through surplus electricity monetization:
0 + 0 = € 0
save up to 3 tons of CO₂ / year
Calculate in detail
* The heating cost savings were determined by comparing them with the average heating costs of all heating systems.

Conclusion

The heat pump is one of the most efficient and environmentally friendly heating solutions of our time. It uses renewable energy sources such as air, water or earth to heat your home sustainably, provide hot water and even cool it. Despite higher initial costs, it often pays for itself after just a few years thanks to low operating costs and government subsidies.

However, if you are looking for an innovative alternative, the Bitcoin heating system from 21energy could be just the thing for you. It combines sustainable heating with the opportunity to earn extra money.

Maximilian Obwexer profile picture

Maximilian Obwexer

Maximilian Obwexer is the co-founder and CEO of 21energy. He shares his expertise here on the blog and as a speaker at various conferences. The main topic is Bitcoin mining & its waste heat utilization.

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