Sole heat pump - Which model?

Hello everyone,

in our house (built in 76, extensively renovated, approx. 450sqm underfloor heating, in NRW) we want to replace the old oil boiler with a brine heat pump with deep drilling. The heating load was calculated at 17kW, the thermal simulation from Ubakus is somewhat lower at just under 14kW.

The house has an indoor pool, which is supplied by a separate pool heat pump, but theoretically could also absorb excess energy from the brine heat pump in winter, if that makes sense.

Actually, I tend to favor a modulating heat pump, among other things because of the existing photovoltaic system. In this performance range, I have found the Nibe S1155 (4-16kW) and iDM Terra (6-17kW), but there are certainly other or maybe better candidates?

How would you approach this? What would you pay attention to? I would like to be as well prepared as possible when meeting our heating engineer... I appreciate any tips!

Thanks and regards

Frank

Welcome to the forum,
the modulating heat pump is important, the lower the minimum value, the better.
Otherwise, rule number 1 applies,
do not force the heating technician to use a device/manufacturer unknown to him.
He knows "his device," has installed it many times, and more importantly, he performs maintenance and repairs on call.
Negotiate whether he will include the Internet module for free.