30 May 2005
The heating by a heat pump provides the chance for reduction of CO2 emissions at the heating of
residential buildings. The minimizing of investment costs serves for a higher acceptance for this
technique. An important point of view is the combination of a heat pump with reduced capacity with a
cost-efficient additional heating as a mono-energetic system.
There are two technical concepts of the low cost heat pump: Compact heat pump unit with a
vertical earth probe with brine, reduced heating capacity and additional electrical heating. All the
possible requirements can be realized by such a heat pump unit. If there is no demand for cooling in
the summertime the vertical earth probe working as heat pipe combined with a compact heat pump
with reduced heating capacity and additional electrical heating is the best solution. The brine pump is
not needed and the heating pump takes over the heat transport from the heat pump which is installed
nearby the earth probe to the heating system.