• Church of St.-Hubertus in Grosselfingen
    MAHRCALOR® church heating built in 2010
  • MAHR archives
    Data and ground plans of thousands of churches kept in our archives
  • Petri church in Lübeck
    MAHR-Actherm® control system for 22.000 m³ of church space
  • Sankt Johann in Denkingen
    MAHR church heating 1978 – long life through quality and regular servicing
  • Cathedral and Church of Our Lady in Trier
    MAHR heating systems in UNESCO world heritage sites
  • Church in winter
    A basic minimum temperature saves the substance of the building


Historical buildings and their often valuable fittings need a perfect climate for us to preserve them in an economical way. Creating these ideal climatic conditions is our task, a task we have been carrying out since 1871, when we installed the first church heating in the Evangelic Church of Saint Anna.

Every church is unique and has its individual character.

An ideal heating system must therefore be adapted individually to different circumstances in order to prevent irreparable damage effectively. Our experience and know-how allow us to come up with intelligent solutions for any kind of historical building. Moreover we work in close contact with preservationists during the planning phase. This enables us to take care of historical objects in a modern way.


Our family business with its 170-year old tradition has faced a multitude of challenges, using them to develop continuously. Our in-house research and development department has come up with numerous individual solutions while also developing specific components that have made their way into our standard range of products.

MAHR is an independent producer, not being bound to particular manufacturers or systems engineering. Consequently we can always choose from among a lot of different systems and components to find the optimal solution for your church and adapt them individually.

Experience, know-how and flexibility have made us the technical and innovative market leader in the field of heating churches – far beyond the boundaries of Germany.