Building equipment » Service » Surfing tips

Surfing tips for heat pumps and ventilation and

heating systems that use geothermal heat

If you know an interesting website with topic-relevant information and miss it here, please inform us accordingly at info (at) . Many thanks in advance.

Heat pumps

Heat pumps are energy savers: Here you can do the sums on an individual basis!
At there is an online guidebook for the calculation of heating costs for different heating systems (heat pump, natural gas, heating oil, wood pellets and district heating) on an individual basis. This is a service of co2online, a project promoter of the climate protection campaign sponsored by the Federal Ministry for the Environment.
Here you can go directly to the calculator

Swiss Federal Office of Energy
The Swiss Federal Office of Energy is conducting a research program on ambient and waste heat and combined heat and power (CHP for short). On its website numerous links and publications on this topic are offered for download.

Information centre for heat pumps
The information centre for heat pumps and refrigeration technology in Hanover, which is sponsored by industry and the Federal Ministry of Economics, is concerned with the improvement of energy efficiency and with environmental protection through the use of heat pumps.

Geothermal Networks
Contains a large collection of links and a very extensive calendar of events relating to the subject of heat pumps.

Electricity tariffs on the web
For all those who want to know more. All information surrounding the subject of electricity, utility companies and rates. With rate calculator etc.

Information services


The German-language website is a project by specialists from several lines of business whose aim is to promote energy-efficient construction and to help building owners build in an inexpensive and environmentally friendly manner. The contents are kept vendor and product-neutral and are updated continuously.

Information and news service for the environment
The information and news service offers up-to-date information on the environment, construction, energy, technology, interior design and much more.

Solar Server
The forum for solar energy in Germany

The interesting and excellent “Sonnenseite” (sunny side) website of the television journalist Franz Alt wants to play a major part in encouraging people to regard the sun as an alternative energy source.

Professional online service for architects, planners and professionals in the building trade

Passive house

Passive House Institute

The Passive House Institute offers advice and support in the planning of passive houses and in the development and optimisation of components suitable for use in them. Basic information on passive houses and a list of manufacturers of passive house components.

Passivhaus Dienstleistung GmbH
Passivhaus Dienstleistung GmbH offers basic information on passive houses, a database of built passive houses, a directory of manufacturers of passive house products, project planning tools for downloading, and consulting and certification services. The info pool contains support programs, check lists, links and more.

Air density

Air density

For years there have been regulations requiring that buildings be made airtight. Here you will find an easily understandable introduction to the subject of air density by Dipl.-Ing. Herbert Trauernicht and information on the test procedure.

EnEV (German Energy Conservation Ordinance)

German Energy Conservation Ordinance EnEV

Since 1 October 2009 the new German Energy Conservation Ordinance (EnEV) has been in force. With heat pumps it is easy to achieve the prescribed limit values.
Here you will find information and links to the official documents of the German Energy Conservation Ordinance (EnEV) and practical help for EnEV application.

Print versionImprint