Contact

+49 241 9560-0  Mail

  • 40627 Düsseldorf-Unterbach
    Kirche St. Mariä Himmelfahrt

    temperature:
    18,3
    °C
    humidity:
    64,8
    %rF
    measured:
    10:30
    h
  • 31134 Hildesheim
    Michaeliskirche

    temperature:
    17,7
    °C
    humidity:
    65,3
    %rF
    measured:
    10:34
    h
  • 47608 Geldern-Hartefeld
    Kirche St. Antonius Abbas

    temperature:
    17,9
    °C
    humidity:
    65,8
    %rF
    measured:
    10:33
    h
  • 40668 Meerbusch-Lank
    Kirche St. Stephanus

    temperature:
    16,8
    °C
    humidity:
    66,9
    %rF
    measured:
    10:31
    h
  • 52062 Aachen
    DOM

    temperature:
    18,5
    °C
    humidity:
    65,9
    %rF
    measured:
    10:32
    h
  • 50676 Köln
    Krypta Maria im Kapitol

    temperature:
    18,3
    °C
    humidity:
    78,4
    %rF
    measured:
    10:31
    h
  • 66346 Püttlingen-Köllerbach
    ev. Martinskirche

    temperature:
    17,8
    °C
    humidity:
    69,0
    %rF
    measured:
    10:30
    h
  • Our 2000th church heating ...
    ... and our team of 1936
  • MAHR company building since 1966
  • Aachen Cathedral
    … equipped with a MAHR church heating since 1912
  • MAHR fleet 2014

Your Consultant

Michael Mahr
Michael Mahr
Managing Director
+49 241 9560-0 Mail

Your Consultant

Theodor Mahr
Theodor Mahr
Managing Director
+49 241 9560-0 Mail

24h on call service

Sundays and Holidays incl.
+49 241 9560-0

Technological advance from the beginning

Theod. MAHR Söhne GmbH with its ca. 150 employees is one of the best-performing companies of North Rhine-Westphalia in the field of heating, airconditioning and ventilation.


Beside the very demanding field of heating churches, MAHR-Technology is being employed in a variety of building-types:

  • Schools
  • Hospitals
  • Institutes
  • Restaurants
  • Parking lots
  • Craft producers / Trading firms
  • Industrial plants
  • chemische Werke und
  • Administrative buildings


With many projects it has turned out to be of advantage that our factory is TÜV-certified for devices with liquids that are hazardous to water. Consistent research and development in tandem with experience of more than one and a half centuries in all areas of heating and ventilating large spaces have given us a significant edge of know-how – for our customers´benefit.

Innovative Know-How ensures our advance in research and development

For several decades MAHR has been the benchmark in the field of heating, ventilation and air conditioning. In order to keep and increase our advance in know-how, we operate our own research and development department.

Here we develop the latest regulation technology, measuring and interpreting room temperature and humidity, and utilizing the data to regulate heating and ventilation fully automatically. This intensive development, rather unusual for a crafts enterprise, has led to a number of patents.

Planning, Component construction, assembly and maintenance – all in one hand

Of course our systems are planned by our engineers in close cooperation with our customers. During the planning phase. MAHR has been employing the latest CAD-Technology for years. Also the implementation of your ideas is completely in our hands. Consequently there is no frictional loss. Our in-company manufacture can flexibly pay attention to specific measurements, special dimensions, additional customer wishes and corrections at short notice – without any loss of time.

No need to mention that also our switchboards with our own regulation technology are produced in-house. Without them there would be no economical and ecological use of our heating, ventilation and air conditioning systems. Our assembly teams ensure a professional installation with their technical skill and practical know-how.

After the startup of your MAHR system our technicians will remain at your disposition to preserve the value of your investment and to prevent any system failure. This can be done by a standing maintenance order or by individual orders with an exactly defined examination and maintenance routine.

In case of an emergency contact our customer service:

from 7.00 AM to 22.00 PM

Theod. MAHR Söhne offers its customers all advantages from one source:

  • Sales staff for comprehensive consulation
  • Planning
  • Execution and assembly
  • Service / Maintenance
  • Delivery of spare parts
  • speedy help in case there needs to be a repair

Products for high expectations – Quality makes the difference

The renowned MAHR quality has its origin in cast-iron ovens, large-scale stoves, large heating ovens and air heating systems, which once served their owners faithfully for up to 80 years.

This quality standard has been kept up until today.

When deciding for a MAHR product, the customer may expect top quality, safe functioning and a long life-span. We feel obliged to our customers´ high expectations. We are totally convinced of our products´ quality – so much so that we offer our customers a warranty that goes far beyond the legal minimum.