Gas heating – these are the costs and advantages

Gas heating - these are the costs and advantages

Gas heaters are very efficient today and can be combined with renewable energies. We show different variants, costs and subsidies for gas heating.

Gas heaters: variants at a glance

Gas heating generates heat by burning gas Heat and for warm water. The heating systems have developed significantly over the past few decades and are very efficient: a new gas heater can be up to 40 percent more economical than an old model. This is mainly due to the high efficiencies of 95 to 98 percent. Almost all of the energy stored in the gas can be used for heating here. The following gas heaters are available:

  • Standard gas heating (gas condensing heating): You can often find classic gas heating under the name "gas condensing heating". It is small and compact, but completely dependent on gas.
  • Gas heating with solar thermal: Gas heaters are increasingly being sold in combination with a solar thermal system. The solar thermal system on the roof provides electricity from renewable energy in summer and on sunny days. At night and on cloudy winter days, the gas heating automatically jumps in when the solar thermal does not provide enough heat to heat the water.
  • Gas heating with constant and low temperature technology: This variant of gas heating is hardly used anymore since it is considered outdated. It uses about ten percent more energy than gas condensing heating because a lot of heat is lost.

There are several types of gas heating:

  • as a heating system for heating rooms,
  • as a combination heater for heating and hot water,
  • as central heating for an entire house
  • and as a gas floor heating for apartment buildings.

We recommend gas heating with solar thermal, as this is the most sustainable. You should use eco gas as fuel. 

Fuels for gas heating

Gas heating: natural gas / eco gas, bio gas or LPG
(Photo: CC0 / Pixabay / ri)

  • natural gas: The classic natural gas is a fossil fuel and therefore finite. In addition, many climate-damaging exhaust gases are produced during combustion. It therefore makes sense to rely on natural gas instead Eco-gas to put.
  • Bio-gas: Bio gas for heating can be produced from plants, manure and food residues. When burning, only as much CO2 can escape as the plants have absorbed in their life. Due to the complex processing, the bio-gas is more expensive than natural gas and is often only offered as a mixture of natural and bio-gas.
  • LPG: Liquid gas is a by-product of natural gas production. It can also serve as fuel for gas heating. The gas from butane and propane only needs a low pressure to be stored in a liquid tank. The tank system is often set up in the garden and costs an additional approximately 2,000 euros.

Ecogas is considered an environmentally friendly alternative to conventional natural gas. But be careful: the matter is more complicated than …

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Advantages and disadvantages of gas heating


  • High efficiency
  • less exhaust gases than with an oil heater
  • easy supply
  • low acquisition costs


  • Gas connection or tank in the garden necessary
  • Dependence on gas and gas price


Purchase gas heating: heating and installation costs

Gas heaters cost between 4,000 and 6,000 euros
(Photo: CC0 / Pixabay / avantrend)

Gas heaters are considered to be the cheapest heaters: They are relatively inexpensive to buy and operate:

  • Purchase price: 4,000 to 6,000 euros
  • Assembly: approx.2,000 euros
  • Gas connection costs: 1,500 to 2,000 euros

Note that these costs refer to classic gas heating. For gas heating with solar thermal, there are additional costs for hot water preparation of around 5,000 euros. There are also costs for the solar system and installation.

Grants and bonuses for gas heating

If you replace your old heating system with a new gas heating system, you can get back up to 15 percent of the costs through support programs:

  • Funding 430 – 1: Subsidy for heating changes of up to 15 percent, max. 7,500 euros per apartment.
  • Funding 430 – 2: Subsidy for renovation to efficiency house standard of up to 30 percent, max. 30,000 euros per apartment.

In addition, there are cheap loans from the Kreditanstalt für Wiederaufbau (KfW) that provide a loan for at least 10 years:

  • KfW funding 152: Credit when changing heating over max. 50,000 euros at 0.75 percent APR. Funding of up to 12.5 percent as a repayment subsidy.
  • KfW funding 151: Loan for renovation to efficiency house standard over max. 50,000 euros at 0.75 percent APR. Funding of up to 27.5 percent as a repayment subsidy (e.g. for Efficiency House 55).

 Read more at Utopia:

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