The German government provides a great deal of funding for energy-saving measures that reduce energy consumption in order to support the climate target.
Mechanical ventilation with heat recovery is an important measure for increasing efficiency and reducing greenhouse gas emissions in the building sector.
The following federal authorities provide funding.


The BAFA and KfW leaflets show exactly which technical requirements e.g. decentralized heat exchangers must meet in order to receive funding.
All of our fresh air heat exchangers already fulfill the first criterion WRG ≥ 80% and the SEL/SPI of ≤ 0.45 W/sqm.
This means that the following federal subsidies can be applied for our heat exchangers for individual energy-related measures, i.e. specifically in connection with the installation, replacement and renewal of a ventilation system.
- BAFA - Grants (► BAFA - system technology (except heating))
In addition, the German government provides loans via the KfW to promote the construction, purchase or renovation of an efficient building.
- KfW loans (► Federal subsidy for efficient buildings (BEG))
Please click here for current information on the respective KfW funding offers:
Marley Deutschland GmbH offers ventilation planning in accordance with the ENEV guidelines of DIN1946-6.
With this ventilation planning you can, for example, claim partial tax deductibility as a subsidy. You can find out more here.