Gas absorption heat pumps (GAHP) use renewable energy with heat pump technology in a chemical process driven by thermal energy. Energy sources can be gas, solar thermal energy or waste heat. They are perfectly suitable to be installed in larger buildings both for renovation and in new buildings, or in areas with a weak electric grid. This technology can achieve a primary energy efficiency of 125-140% thus saving considerable amounts of energy (up to 40% on heating costs every year compared to the condensing boilers). Lower heating costs makes GAHP a cost effective and environmentally friendly investment with short payback times. Gas engine heat pumps offer besides highly efficient heating as mentioned herefore, also versatile cooling and hot tapwater options. All gas heat pump types enhance the energy efficiency they also increase the value of the building,reducing the energy bills while reducing carbon emissions: better for business, better for the environment.