Boligfritid.dk is a Danish magazine for homeowners. This English version is written for international residents in Denmark. Read the original in Danish.
Updated 23 October 2026. An air-to-water heat pump is a big investment, but also one of the most effective ways to cut your heating bill if you currently have an oil boiler, a gas boiler or electric heating. Here is what it costs, what the price covers and what you can get in grants.
Typical price including installation
There is no official list price, because the price depends on the size of the house, its heat loss and the installation. Danish price guides and installers do, however, broadly agree on these levels for a complete installation including VAT:
| Size of the house | Typical price including installation |
|---|---|
| Under approx. 100–120 m² | approx. DKK 80,000–110,000 |
| Approx. 150 m² | approx. DKK 100,000–160,000 |
| 200 m² and above | approx. DKK 130,000–190,000 |
The prices are indicative and collected from several commercial price guides in 2026. The only price you can rely on is a fixed quote for your house.
What the price covers
- The heat pump: outdoor and indoor unit, often with a built-in hot water tank.
- Plumbing work: connection to radiators or underfloor heating, pipes through the wall and commissioning.
- Electrical work: connection in the electrical panel and possibly a new circuit.
- Removing the old system: taking out and disposing of the oil tank, gas boiler or boiler.
- Extra radiators: may be needed if the house has small radiators. If you have electric heating, a water-based heating system must be put in, which is a bigger job.
Always ask for a quote where each part is itemised, so you can compare quotes.
Grants and deductions that bring the price down
- Varmepumpepuljen (the heat pump grant scheme): DKK 27,000 when you switch from oil, gas, electric heating or a biomass boiler, if you do not live in a district heating area. The scheme is open for applications (checked 24 October 2026). Read more about heat pump grants.
- Håndværkerfradrag (tax deduction for home improvement work): up to DKK 9,000 per person in 2026 for the labour cost (worth approx. 26%). As a rule, you cannot get both a grant and a deduction for the same project.
- Free disconnection from the gas network and the option to avoid the land registration fee (tinglysningsafgift) and loan fee if you borrow money to replace your boiler.
What does it cost to run?
An air-to-water heat pump makes 3–6 kWh of heat from 1 kWh of electricity. If your house needs 18,000 kWh of heat a year and the heat pump has a seasonal efficiency (SCOP) of 4.0, it will use approx. 4,500 kWh of electricity. With a total electricity price of approx. DKK 1.80 per kWh, which is Danmarks Statistik’s (Statistics Denmark’s) average for households in the first half of 2026, that is approx. DKK 8,100 a year. With underfloor heating and a SCOP of 5.0, it comes to approx. DKK 6,500.
Try our savings calculator (in Danish) with your own figures, and follow today’s electricity price (in Danish) if you pay by the hour.
When has it paid for itself?
The payback time is the price after grants divided by the annual saving. Example: if the system costs DKK 120,000 and you get DKK 27,000 in grants, your price is DKK 93,000. If you save approx. DKK 19,000 a year by replacing an oil boiler, the payback time is approx. 5 years. When switching from gas, the saving is smaller and the payback time longer.
Buy or subscribe?
You can also get an air-to-water heat pump on a subscription. You then pay a set-up fee and a fixed monthly price, and the supplier takes care of running and repairs. If you scrap a gas, oil or wood pellet boiler, the supplier can get up to DKK 25,000 from Skrotningsordningen (the boiler scrapping scheme), which must benefit you in the price. If you buy it yourself, it is usually cheaper in the long run.
If you want to choose a model, see our comparison of 11 air-to-water heat pumps, ranked by efficiency and noise.
Get a calculation for your house
H-Energi ApS provides a free heat loss calculation and a fixed quote for a complete installation. Get 3 quotes at varmepumpe-lufttilvand.dk (our partner, in Danish).
Sources
- SparEnergi: Switching to an air-to-water heat pump (in Danish)
- SparEnergi: Apply for grants (in Danish)
- Price levels: byggeli.dk, bygguiden.dk and kvaligo.dk (commercial price guides, 2026, in Danish)
Få et uforpligtende tilbud på varmepumpe
Vores samarbejdspartner H-Energi ApS rådgiver om og installerer varmepumper. Udfyld formularen, så kontakter de dig med et gratis og uforpligtende tilbud.
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