7 / Heat pumps

Heat pump design

Sizing and design of heat pumps for new and existing buildings - from heat load calculation to commissioning.

What we take care of

  • 1Heat load calculation for the building
  • 2Choice of heat source: mostly air, ground source (boreholes or collectors) where conditions allow
  • 3Sizing of heat pump, buffer tank and domestic hot water
  • 4Check of heat distribution: underfloor heating, radiators, flow temperature
  • 5Hybrid systems: heat pump combined with an existing boiler
  • 6Coordination with an existing or planned PV system
  • 7Notification of geothermal boreholes to the Provincial Environment Agency
  • 8Support with provincial grants, Conto Termico and tax deductions
  • 9Site supervision

This list is not complete - describe your project and we will tell you which points are relevant for you.

How we work together

  1. First meeting and site visit: building, existing heating, consumption and goals.
  2. Heat load calculation and check whether the existing heat distribution is suitable.
  3. Comparison of possible heat sources and recommendation for your building.
  4. Design of heat pump, storage, hydraulics and position of the outdoor unit.
  5. Notifications and grant applications, obtaining and comparing quotes.
  6. Site supervision, commissioning and documents for incentives.

Time and cost

Designing a heat pump for a single-family house usually takes a few weeks. With geothermal boreholes, notification and drilling are added. The effort depends on the size and condition of the building, the chosen heat source, the combination with PV or existing heating and whether site supervision is included.

Legal basis

Heat load is calculated according to UNI EN 12831-1. Energy performance is governed by the South Tyrol provincial rules and the Technical Guideline of the KlimaHaus Agency, supplemented by Legislative Decree 192/2005 with the Ministerial Decree of 26.06.2015 on minimum requirements. For air source heat pumps we pay attention to noise protection and the correct position of the outdoor unit. In South Tyrol geothermal boreholes only require a notification, no water concession. Groundwater heat pumps require a concession and a hydrogeological report; they are therefore usually only economical for larger buildings. Refrigerants are subject to the EU F-gas Regulation 2024/573.

Service area

We work throughout Vinschgau / Val Venosta - from Reschen/Resia, Graun/Curon and Mals/Malles via Prad/Prato, Laas/Lasa and Schlanders/Silandro to Naturns/Naturno - in the Burggrafenamt / Burgraviato around Meran / Merano and on request throughout South Tyrol. Our office is based in Prad am Stilfserjoch / Prato allo Stelvio; site visits are standard for us. We work in German and Italian.

Frequently asked questions

Does a heat pump work in an existing building?

Often yes. Heat load and flow temperature are decisive. We check whether the existing radiators are sufficient or whether insulation or changes to the heat distribution make sense first.

Air or ground source - what suits Val Venosta?

It depends on altitude, plot and heat load. Air source heat pumps cost less to buy, ground source systems work more evenly in winter. We calculate both options for your building.

Can I keep my existing boiler?

Yes, as a hybrid system: the heat pump covers most of the demand and the boiler takes over on particularly cold days. We check whether this makes sense for your building.

Do I need underfloor heating?

Not necessarily. Underfloor heating is ideal, but a heat pump also works with suitably sized radiators.

Is it worth combining with photovoltaics?

Often yes, because part of the electricity for the heat pump is generated on site. We design both to work together.

How loud is the outdoor unit?

Modern units are quiet, but the position still matters. We pay attention to distances from neighbours and bedrooms.

Are there incentives?

Yes, depending on the case provincial grants, Conto Termico or tax deductions. The conditions change often; we check the current situation for your project.