BAFA funding for inVENTer ventilation systems: In order to advance environmentally friendly technologies, state support is required. One focus of the Federal Office of Economics and Export Control, or BAFA for short, is to support new, particularly energy-efficient technologies and measures that help save energy and to build them up with funding. So far, the replacement of the heating system as well as various measures for heating optimization have been eligible for funding. The use of renewable energies through to energy advice for residential buildings was also supported by the division of the Federal Ministry for Economic Affairs and Energy with subsidies. Since January 2020, BAFA has also been subsidizing the combination of a ventilation system with heat recovery with an eligible heat pump of up to 45%.