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    MAHRCALOR® church heating built in 2010
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    Data and ground plans of thousands of churches kept in our archives
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  • 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

Heating under the seating

Structure of the system

Heating devices under the seats or under the footstools can be operated with electricity or with warm water. The heating elements are fitted below the seating surface and give off heating energy in the form of radiation. The heat released grows according to the temperature on the surface of the radiator.
As this kind of system only aims for heating a very limited space and isn´t able to protect the building against condensation, we would never recommend this system exclusively. Combining it with a different system may be an option.

Advantages of this system are:

  • A strong sensation of warmth on the part of the visitor due to the radiation.
  • Easy and fast installation (when using electricity)
  • No gratings in the church floor.
  • Fast action (when using electricity)


Disadvantages of the system:

  • The sometimes very high temperatures on the surface of the heating elements bear the risk of a fire, especially if carpets or other inflammable materials are within the range of radiation.
  • When installing a heating under the seating the capacity is limited to the seating facilities. Calculating the heat requirement doesn´t therefore make much sense as the heat requirement won´t be met. Moreover such a system needs stationary seating.
  • In order to cover at least part of the heat required in the church, the radiators are often operated at surface temperatures of up to 800°C. On these hot surfaces you regularly observe a heavy carbonization of dust, i.e. dust particles in the air are turned into soot and ashes which are then lifted in the air and distributed all over the church space. Dirty walls and ceiling are the consequence.
  • As the system is normally used at daytime, it results in high specific energy costs! Heating devices under the seats operated by warm water give off less heat and are more complicated to fit.