Located in the heart of the Istrian peninsula between Pula, Rovinj and Rabac, Villas Adagio is a 9-house villa rental complex. Client comfort was of paramount importance to the property owners.

B&B Kovač is a 20-room hotel with a restaurant located in Portorož, Slovenia. The hotel used to be heated by an oilfired boiler and radiators. Domestic hot water (DHW) was prepared in two 300 litre DHW heaters (V= 2x300=600 litres).

Situated in a small picturesque Istrian village Ruzici, a few kilometres from the Istrian coast, Villas Bonadais a settlement comprising of 3 rental villas with independent swimming pools. The facility owners initially planned to heat the new villas solely through air conditioning units. Due to the shortcomings that this would entail in comfort levels and long-term economy they opted for a hybrid heat pump system instead.