In passive houses, so-called heat pump compact units are often used. These devices combine water heating, building heating and ventilation. The prerequisite for the use of a heat pump compact unit is a particularly low heating requirement, which allows the heat required for heating to be transported exclusively via the air exchange prescribed for hygienic reasons - a basic idea of the passive house. In addition to the heat exchanger, the ventilation unit is coupled with a heat pump, which extracts the remaining residual heat from the cooled exhaust air of the heat exchanger and thus heats the supply air on the heat exchanger's supply line. In addition, the energy generated can also be used to heat domestic water. The effectiveness of the system can be further increased by combining it with a solar system.
1 Ventilation unit
2 Heat exchanger
3 Heat pump
4 Buffer tank
5 Pre-temperature control (AUL) Ground-to-air heat exchanger
6 Exhaust air duct (FOL)
7 Exhaust air duct (ABL)
8 Supply air duct (ZUL)
9 Heat exchanger from exhaust air for heat pump
10 Afterheating coil
Source: bauwion
