Heat pumps: types, costs, subsidies and selection

Understand heat-pump types, installation costs, Slovak subsidies and the questions to ask before choosing a system.

An independent site. We do not sell or install heat pumps. Every price has a source and a date.

How much a complete installation costs

€4,988 to €13,500 and more

Air-to-water for a family house, before subsidy. Prices checked 20 October 2026.

up to €4,000

Zelená domácnostiam II. You pay the full price upfront. SIEA decides eligibility and payment.

Heat pumps differ in where they get heat and what they heat. Here is a brief overview.

Air-to-water
Takes heat from outdoor air and heats water for radiators or underfloor heating, as well as domestic hot water.
Air-to-air
Heats and cools rooms through wall-mounted indoor units, like air conditioning. It does not heat water.
Ground-source
Extracts heat from the ground through a borehole or garden collector. Ground works make up a substantial part of the cost.
Water-source
Extracts heat from groundwater in wells. It needs enough suitable water and the relevant permissions.
For pools
A separate, smaller heat pump that warms pool water during the swimming season.
Heat-pump water heater
Heats domestic hot water only. It takes heat from the air around it.

These are illustrations, rather than photographs of real installations.