Electric heating in comparison: advantages & disadvantages of modern heating systems

Electric heating in comparison: advantages & disadvantages of modern heating systems

Electric heating systems are becoming increasingly popular thanks to technological advances. Whether as the main heating system or to support existing systems, they offer flexible and uncomplicated solutions for different requirements. In this article, we compare the advantages and disadvantages of electric heating systems and present the innovative heating solutions from 21energy that combine warmth with financial benefits.

How do electric heaters work?

Electric heaters convert electrical energy directly into heat. Depending on the type, this happens in different ways:

  • Infrared heating: Heats walls, objects and people in a targeted manner using radiant heat and creates a pleasant room climate.
  • Electric fan heaters: These devices generate warm air and are ideal for quickly heating small rooms.
  • Electric underfloor heating: Provides pleasant warmth from below and is often used in bathrooms or living areas.

Why choose Ofen 2

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

New
1,000 W
Power*
50 m²
Area heated
32 dB
Noise level
up to 35 TH/s
Mining power*
€ 0.08 / kWh
Bitcoin reward
(1-year average)**
€ 0.18 / kWh
Bitcoin reward
(4-year average)**
90 x 32 x 14 cm
Size
24 kg
Weight
* ± 10%
** As at 06.2025
€1.590,00
incl. VAT & shipping
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Free shipping
30-day-return
Made in Austria

Advantages & disadvantages of electric heaters

The following table provides a clear overview of the advantages and disadvantages of electric heaters:

Advantages Disadvantages
  • Simple installation without major structural measures
  • Space-saving and flexible in use
  • Perfect for temporary or additional heating
  • Almost climate-neutral in combination with photovoltaic systems
  • With 21energy systems: Additional income through Bitcoin mining
  • High operating costs when using mains electricity
  • Less suitable for large living spaces
  • Dependent on electricity price trends

Heating solutions from 21energy: More than just heat

21energy is setting new standards with its heating systems. In addition to the classic heat supply, the heating appliances offer innovative features such as Bitcoin-Mining, which generates additional income during the heating process. 

 

  • The 21energy stove: Ideal for smaller rooms with a heat output of up to 800 watts. It heats areas up to 32 m² and works extremely quietly (<35 dB). You earn Bitcoin while heating - a perfect solution for an efficient and financially attractive heating system.
  • Der 21energy Stove Pro: For larger rooms, the Stove Pro offers a heating output of up to 1,100 watts and covers areas of up to 44 m². Here, too, you benefit from Bitcoin mining technology.
  • Edge industrial solution: With a heating output of up to 9 kW and coverage of 360 m², the Edge is perfect for large buildings. Thanks to Plug & Play and mining outputs of up to 360 TH/s, it offers maximum efficiency.
  • Shield industrial solution: More compact solution with up to 2 kW heating output and a coverage of 80 m². The Shield is particularly suitable for commercial premises and combines heat with modern technology.

 

Electric heaters compared to other heating systems

Electric heaters have their strengths and weaknesses compared to other heating systems:

Heating system Advantages Disadvantages
Heat pump
  • Low operating costs
  • Renewable energy source
  • Eligible for subsidies
  • High acquisition costs
  • Efficiency depends on good insulation
Pellet heating
  • CO₂-neutral
  • Suitable for old and new buildings
  • Greater space required for storage
  • Higher maintenance costs
21energy Electric heating
  • Simple installation
  • Additional income from Bitcoin mining
  • Suitable for residential and commercial spaces
  • Dependent on electricity prices
  • Higher electricity costs with pure grid electricity

Calculate your annual heating savings

Electr. costs (/kWh)
-
0.20
+
97
Variable electricity price
PV system
Heat pump
Heat pump
- € 825
/ Year
Gas & Oil
Gas & Oil
- € 2,556
/ Year
Electric
Electric
- € 3,300
/ Year
Bitcoin heater
Bitcoin heater
- € 3,300
/ Year
+ € 3,695
/ Year
Average heating cost savings per year. *
€ 2,623
save up to 7 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.

When is electric heating worthwhile?

Electric heating is particularly suitable in the following scenarios:

  • Smaller rooms: Ideal for bathrooms, hobby rooms or garden sheds where selective heat is required.
  • Temporary use: Perfect for vacation homes or rooms with sporadic heating requirements.
  • Combination with photovoltaics: Use solar power from your photovoltaic system to minimize operating costs and heat in a climate-neutral way.
  • Financial benefit: With heating solutions from 21energy, you not only heat efficiently, but also earn money through Bitcoin mining.

 

Conclusion: Electric heaters for modern requirements

Electric heating systems are a versatile and environmentally friendly solution, especially in combination with renewable energies such as solar power. The innovative heating systems from 21energy set new standards by combining heat and passive income through Bitcoin mining. Analyze your individual needs and check whether electric heating is the ideal solution for your home.

Picture from Tom on Pixabay

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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