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Best heat pump for your home 2026 – air-to-air, air-to-water and ground-source
Which heat pump suits your house? We explain the difference between air-to-air, air-to-water and ground-source, what SCOP tells you and how to choose an installer.
Our picks
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| Model | Score | Best for | Pros | Cons | Buy |
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 Mitsubishi Electric MSZ-LN | 8.6 | Homeowners who want high efficiency and comfort |
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 Daikin Perfera / Stylish (Nordic variant) | 8.3 | Buyers who want an established supplier and a wide range |
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 NIBE S2125 (air-to-water) | 8.4 | Houses with water-based heating |
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 NIBE ground-source (S1255 / F series) | 8.2 | Larger houses with high annual consumption |
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A heat pump can cut heating costs sharply, but it is a big decision and the installation matters a great deal. This guide is shorter than our others because the right choice depends on your house, but we go through the main types and what to consider. We do not quote prices; ask for several quotes.
Note: a guide does not replace an energy survey or a quote from a certified installer.
Who is this guide for?
- Homeowners with direct electric heating, oil or older heating systems
- Anyone considering supplementing existing heating
- Anyone who wants to understand the differences between types
How we evaluate
We do not have a test lab and do not measure heat pumps. We rely on:
- Specifications: SCOP, output at low temperatures, noise level.
- Experience of installers and users from forums and reviews.
- Service and warranty: how easy is it to get help?
- Fit: which type suits which house?
Scores are editorial judgements.
Our picks
Mitsubishi Electric MSZ-LN – best air-to-air
The MSZ-LN is one of the most recommended air-to-air pumps in the Nordics. It is quiet and efficient and has a good reputation among installers. The price is high, but many feel the comfort is worth it.
Daikin Perfera / Stylish – established alternative
Daikin has a wide range and good availability of installers. Choose a Nordic variant if you live where it gets cold. Price variation between installers is large.
NIBE S2125 – air-to-water for water-based heating
If your house has radiators or underfloor heating with water-based heat, an air-to-water pump from NIBE can be a good choice. It is a Swedish brand with a large service network. Installation is more extensive, and the outdoor unit should be placed with noise in mind.
NIBE ground-source – best in the long run
Ground-source heating gives high and stable efficiency and is often best in the long run, especially for large houses. It requires drilling, permits and a high investment.
Comparison criteria
Heat pump type
- Air-to-air: cheapest, suits direct electric heating, heats one or several rooms.
- Air-to-water: for houses with a water-based system.
- Ground-source: highest efficiency, highest investment.
- Exhaust-air: suits some houses with mechanical ventilation.
SCOP and output in the cold
Look at efficiency at low temperatures, not just the annual figure.
Noise
The outdoor unit should not be placed by a bedroom window or a neighbour.
Service and warranty
Ask about service agreements, warranty length and how quickly the installer can come.
Installer
The installer’s skill determines lifespan and efficiency.
Common mistakes
- A pump that is too large or too small.
- The cheapest quote without references.
- Poor placement of the outdoor unit.
- Forgetting the electrical system: a heat pump and a wallbox can together load the main fuse.
- Expecting full savings immediately: profitability depends on electricity price and how you use it.
Verdict
- Best air-to-air: Mitsubishi Electric MSZ-LN.
- Established alternative: Daikin Perfera / Stylish.
- Best air-to-water: NIBE S2125.
- Best in the long run: NIBE ground-source.
Always ask for several quotes. You will find more guides in the Heat pumps category. If you want smart heating control, read our smart home starter kit.
FAQ
Air-to-air or air-to-water – which should I choose?
Air-to-air is cheapest and simplest and suits houses with direct electric heating. Air-to-water suits houses with a water-based heating system and can replace oil or district heating. Do the maths for your house – an energy survey can help.
What does SCOP mean?
SCOP is a measure of seasonal efficiency under the EU energy label. Higher is better, but it is a theoretical value. Real savings depend on climate, house insulation and how you use the pump.
Do I need a building permit?
It depends on the municipality and type of pump. Ground-source systems usually require notification or a permit, and outdoor units may be affected by noise rules. Contact your municipality’s environment and building office.
Is there a tax deduction for heat pumps?
There may be a ROT deduction for labour costs, but rules change. Check the current terms with the Swedish Tax Agency before booking an installer.
How do I choose an installer?
Choose an installer with the right certification (refrigerant/F-gas competence) and references. Ask for several quotes, check warranty terms and ask for a calculation of expected savings.
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