Heat pumps in new and existing buildings

When it comes to the right heating system for new buildings, house builders are increasingly relying on heat pumps.

Heat pumps in old buildings

Unlike new buildings, existing buildings require more heat. A heat pump can be integrated into such buildings without problems, but for economical operation, sufficiently large radiators that can operate with low flow temperatures and the lowest possible final energy requirement may be required.

Nevertheless, heat pumps can be used as hybrid heat pumps or bivalent heating systems for non-refurbished buildings. 

The installation of a heat pump is all the more attractive after renovation. This is because the energy values have improved after such measures and the conditions for subsidies can be fulfilled more easily compared to new buildings.

Optimal heat source for older buildings

For use in an older building, the same heat sources are suitable as for new buildings. In practice, homeowners often use air-water heat pumps. This is due on the one hand to the relatively low investment costs and on the other hand to the fast installation without the need for a permit. However, if the property is suitable for a ground fed system, then the operation of a brine-water heat pump should be considered. This achieves higher annual performance figures throughout the year and results in lower operating costs.

The heat pump in combination

Another possibility to use the heat pump in an old building economically and sensibly is bivalent operation. If the existing heating system is still intact, it can in most cases be combined with the new heat pump. During operation, the intelligent control technology ensures that the heat pump always operates in the highly efficient range and that the existing boiler is only switched on at peak load.

The Vitocal 200-G heat pump is suitable for use in new or existing buildings

The Vitocal 200-G heat pump is suitable for use in new or existing buildings.

Heat pumps in new buildings

In principle, new buildings have good energy values and a correspondingly low heat requirement. As a rule, modern condensing boilers are used to heat the rooms, which also operate in a temperature range of 35 to 50 degrees Celsius with high efficiencies. A heat pump is also one of the most frequently used heating systems in new buildings. The reasons for this are obvious: on the one hand, heat pumps achieve the highest efficiencies in such houses; on the other hand, part of the primary energy demand in new buildings must be covered by renewable energies, which is easily possible with the operation of a heat pump.

Operating heat pumps with photovoltaic systems

The sensible use of free environmental energy is also possible with a photovoltaic system. This absorbs the solar radiation with the help of an absorber and converts the solar energy into electricity. Depending on the orientation, type of collectors and global radiation, a photovoltaic system can cover a large part of the power requirement. Combined with a heat pump, solar power can be used for the heat pump cycle. This will make homeowners a bit more independent of their electricity suppliers. In addition they heat in this way almost CO₂-free, which benefits the environment. The heat pump itself has an intelligent PV self-power optimisation function. This makes the best possible use of self-produced solar power.

Regardless of whether the heat pump is used in a new building or an old one. In order to guarantee a permanently safe and economical operation, the heating system must fit the heating requirement as exactly as possible. The section Buying a heat pump explains what homeowners should be aware of when buying.