Using a newly developed simulation model for electricpowered compression heat pumps, ventilation modules with an integrated exhaust air heat pump for supplying heat for passive solar houses are studied. New units are tested in the conception and design phase. Different designs can be compared before readings are taken from the first prototype. The capacity of the method is tested and the simulation model is validated on the example of a simulated integrated ventilation and heat supply unit for passive solar houses that is intensively measured.