• Cathedral and Church of Our Lady in Trier
    MAHR heating systems in UNESCO world heritage sites
  • Abbey church in Großlittgen-Himmerod
    MAHRCALOR® church heating built in 2008 at Miscanthus district heat station
  • Petri church in Lübeck
    MAHR-Actherm® control system for 22.000 m³ of church space


In order to build, enlarge or renew duct systems in the church floor, we use our prefabricated »MAHR-Isokanal« as an alternative to masoned duct systems.

The single elements are prefabricated as straight ducts, arched ducts, or pieces with a leap according to your specification and come with a long-life waterproof insulation 3 cm thick.

Element straight duct


Using a MAHR-Isokanal-System you conduct air through a steel sheet duct in a durable and hygienic way, and in combination with an effective insulation against losing energy into the soil.

The following illustration shows the combination of single elements as they are laid in the soil at a later stage. The air duct system ends with an exit, above which the gratings will be laid.

Combination of single elements

MAHR-Isokanal duct systems to be laid in the soil are designed and joined individually.

We will gladly advise you. Don´t hesitate to contact us.