Is it possible to install a heat pump as a retrofit measure in an existing building? What criteria must be met, and what are the critical aspects?

Yes, it is possible to install heat pumps in existing building, but building envelope optimization is mandatory: Insulate walls/roof and upgrade glazing to reduce the annual heat demand and the maximum load. Critical aspects to focus on are the lower supply temperatures of heat pumps, often resulting in the need to install larger radiators/ convectors. A hydraulic balancing of the system must be performed to ensure even heat distribution.

Answered by
Michael Strobel