Best 12–16 kW air source heat pumps (2026)
268 models in our database meet this; below the first 25 in order.
Criteria:
- Type (source): Air-to-water
- Rated output 35 °C from 12 up to 16 kW
- Ranking: data score with these weights: SCOP (35 °C) 30 % · SCOP (55 °C) 25 % · Outdoor unit sound power 25 % · Refrigerant GWP 20 %
Air-to-water heat pumps only: ground-source and water-to-water heat pumps reach a higher SCOP thanks to their warmer source, so they cannot be compared fairly with air-to-water units. They have their own selections.
A ranking based on manufacturer and register data, not a test: we have not measured the units ourselves, and price, installation and service are not included. The source of every value is on the product page.
The ranking
Image: Boschrequest removal Bosch CS8800iAW 13 O-T
Data score 90/100
- SCOP (55 °C) 4.13: no. 5 of 267 models
- SCOP (35 °C) 5.37: no. 10 of 268 models
Choose this model if you have underfloor heating and want to use as little electricity as possible.
Image: Buderusrequest removal Buderus WLW186i-13 MBE+ AR E
Data score 90/100
- SCOP (55 °C) 4.13: no. 5 of 267 models
- SCOP (35 °C) 5.37: no. 10 of 268 models
Choose this model if you have underfloor heating and want to use as little electricity as possible.
Image: Buderusrequest removal Buderus WLW-13 MBE+ AR
Data score 90/100
- SCOP (55 °C) 4.12: no. 7 of 267 models
- SCOP (35 °C) 5.37: no. 10 of 268 models
Choose this model if you have underfloor heating and want to use as little electricity as possible.
ACOND Grandis-L16
Data score 88/100
- SCOP (35 °C) 5.49: no. 4 of 268 models
- SCOP (55 °C) 4.03: no. 16 of 267 models
Choose this model if you have underfloor heating and want to use as little electricity as possible.
Hargassner AirPro 515
Data score 88/100
- Outdoor unit sound power 41 dB(A): no. 5 of 268 models
- SCOP (35 °C) 5.2: no. 22 of 268 models
Choose this model if you have underfloor heating and want to use as little electricity as possible.
Image: iDMrequest removal iDM AERO ALM 6-15
Data score 88/100
- SCOP (35 °C) 5.58: no. 2 of 268 models
- SCOP (55 °C) 4.1: no. 11 of 267 models
Choose this model if you have underfloor heating and want to use as little electricity as possible.
Image: TEMPLARIrequest removal TEMPLARI Unità esterna KITA-SP-12, 1Ph, vers. MONOBLOCCO R-290
Data score 87/100
- SCOP (35 °C) 5.44: no. 6 of 268 models
- SCOP (55 °C) 4.05: no. 12 of 267 models
Choose this model if you have underfloor heating and want to use as little electricity as possible.
Image: TEMPLARIrequest removal TEMPLARI Unità esterna KITA-MP-18, 3Ph, vers. MONOBLOCCO R-290
Data score 86/100
- SCOP (55 °C) 4.17: no. 2 of 267 models
- SCOP (35 °C) 5.38: no. 9 of 268 models
Choose this model if you have underfloor heating and want to use as little electricity as possible.
Image: Kermirequest removal Kermi x-change dynamic pro L
Data score 85/100
- SCOP (35 °C) 5.5: no. 3 of 268 models
- SCOP (55 °C) 4.12: no. 7 of 267 models
Choose this model if you have underfloor heating and want to use as little electricity as possible.
Image: CTArequest removal CTA AH CV 18a
Data score 85/100
- SCOP (35 °C) 5.33: no. 14 of 268 models
- SCOP (55 °C) 4.05: no. 12 of 267 models
Choose this model if you have underfloor heating and want to use as little electricity as possible.
Inova ACP15
Data score 85/100
- SCOP (35 °C) 5.32: no. 15 of 268 models
- SCOP (55 °C) 4.05: no. 12 of 267 models
Choose this model if you have underfloor heating and want to use as little electricity as possible.
Image: Viessmannrequest removal Viessmann Vitocal 250-A IDU-A AWMIW.A1.19-V052 / ODU 250-A AWMOF-251.A1.13-400-V001
Data score 84/100
- SCOP (55 °C) 4.12: no. 7 of 267 models
- SCOP (35 °C) 5.09: no. 33 of 268 models
Choose this model if you have underfloor heating and want to use as little electricity as possible.
Image: Viessmannrequest removal Viessmann Vitocal 250-A IDU-A Hybrid HWMIW.A1.19-V054 / ODU 250-A AWMOF-251.A1.13-400-V002
Data score 84/100
- SCOP (55 °C) 4.12: no. 7 of 267 models
- SCOP (35 °C) 5.09: no. 33 of 268 models
Choose this model if you have underfloor heating and want to use as little electricity as possible.
SOLVIS SolvisPia 13
Data score 82/100
- SCOP (55 °C) 4.05: no. 12 of 267 models
- SCOP (35 °C) 5.25: no. 19 of 268 models
Choose this model if you have underfloor heating and want to use as little electricity as possible.
SOLVIS SolvisLea 10 Pro
Data score 82/100
- SCOP (55 °C) 4: no. 19 of 267 models
- Outdoor unit sound power 46 dB(A): no. 32 of 268 models
Choose this model if you are keeping (some) radiators and the heat pump has to run at a higher flow temperature.
STIEBEL ELTRON WPL-A 10.2 Plus HK 400
Data score 82/100
- SCOP (55 °C) 4: no. 19 of 267 models
- Outdoor unit sound power 46 dB(A): no. 32 of 268 models
Choose this model if you are keeping (some) radiators and the heat pump has to run at a higher flow temperature.
Image: Tecalorrequest removal Tecalor TTL 10.1 AC comfort
Data score 82/100
- SCOP (55 °C) 4: no. 19 of 267 models
- Outdoor unit sound power 46 dB(A): no. 32 of 268 models
Choose this model if you are keeping (some) radiators and the heat pump has to run at a higher flow temperature.
Image: Buderusrequest removal Buderus WLW-15 MBE+ AR
Data score 81/100
- SCOP (55 °C) 4: no. 19 of 267 models
- SCOP (35 °C) 5.02: no. 48 of 268 models
Choose this model if you have underfloor heating and want to use as little electricity as possible.
SOLVIS SolvisLea 13 Pro
Data score 81/100
- SCOP (55 °C) 4: no. 19 of 267 models
- Outdoor unit sound power 45 dB(A): no. 6 of 268 models
Choose this model if you are keeping (some) radiators and the heat pump has to run at a higher flow temperature.
STIEBEL ELTRON WPL-A 13.2 Plus HK 400
Data score 81/100
- SCOP (55 °C) 4: no. 19 of 267 models
- Outdoor unit sound power 45 dB(A): no. 6 of 268 models
Choose this model if you are keeping (some) radiators and the heat pump has to run at a higher flow temperature.
Image: Tecalorrequest removal Tecalor TTL 13.1 AC comfort
Data score 81/100
- SCOP (55 °C) 4: no. 19 of 267 models
- Outdoor unit sound power 45 dB(A): no. 6 of 268 models
Choose this model if you are keeping (some) radiators and the heat pump has to run at a higher flow temperature.
Image: Boschrequest removal Bosch Compress 3800i AW CS3800iAW 13 OE-S
Data score 81/100
- SCOP (35 °C) 5.26: no. 17 of 268 models
- SCOP (55 °C) 3.95: no. 34 of 267 models
Choose this model if you have underfloor heating and want to use as little electricity as possible.
Image: Buderusrequest removal Buderus WLW176i.2-13 MBB AR E
Data score 81/100
- SCOP (35 °C) 5.26: no. 17 of 268 models
- SCOP (55 °C) 3.95: no. 34 of 267 models
Choose this model if you have underfloor heating and want to use as little electricity as possible.
Image: Boschrequest removal Bosch CS8800iAW 15 O-T
Data score 80/100
- SCOP (55 °C) 3.99: no. 30 of 267 models
- SCOP (35 °C) 5.02: no. 48 of 268 models
Choose this model if you have underfloor heating and want to use as little electricity as possible.
Image: Buderusrequest removal Buderus WLW186i-15 MBE+ AR E
Data score 80/100
- SCOP (55 °C) 3.99: no. 30 of 267 models
- SCOP (35 °C) 5.02: no. 48 of 268 models
Choose this model if you have underfloor heating and want to use as little electricity as possible.
All figures at a glance
How this ranking is made
This selection is put together automatically from the 268 models in our database that meet the criteria above. We only include models whose figures for the ranking are known: without those values a model cannot be compared fairly, so it drops out. The list is recalculated with every data update, so the order can change as soon as manufacturers or registers publish new values.
The order follows a data score from 0 to 100. For each feature we determine a model’s position relative to the other models in this selection: the best value counts as 100, the weakest as 0, and equal values share the same position. We add up those positions with weights: SCOP (35 °C) 30 % · SCOP (55 °C) 25 % · Outdoor unit sound power 25 % · Refrigerant GWP 20 %. A feature that is unknown for a model does not count; if more than 40 per cent of the weight is missing, the model is left out. If two scores are equal, SCOP (35 °C) decides.
The reasoning for each place is derived automatically from the same data. We name the features on which the model is in the best quarter of this selection, functions that not every model has, and a weaker point if the model falls in the bottom quarter on it. The line ‘Choose this model if …’ links the most heavily weighted strength to a situation where it matters. This is not a test and not personal advice: the installation, your home and the price also decide what works best for you.
The values come from EPREL, Keymark and manufacturers; the product page shows the source of every value. How we collect and check the data →
More selections
- Quietest 4–6 kW air-to-water heat pumps
- Most efficient 4–6 kW air-to-water heat pumps
- Quietest 6–8 kW air-to-water heat pumps
- Most efficient 6–8 kW air-to-water heat pumps
- Quietest 8–10 kW air-to-water heat pumps
- Most efficient 8–10 kW air-to-water heat pumps
- Quietest 10–14 kW air-to-water heat pumps
- Most efficient 10–14 kW air-to-water heat pumps
- Best air source heat pumps
- Best 4–6 kW air source heat pumps
- Best 6–8 kW air source heat pumps
- Best 8–12 kW air source heat pumps
- Quietest air source heat pumps
- Heat pumps with R290 (propane)
- Most efficient heat pumps for radiators (55 °C)
- Air-to-water heat pumps
- Ground-source heat pumps (brine-to-water)
- Water-to-water heat pumps (groundwater)
- Best hybrid heat pumps (with a gas boiler)
Sources
- Heat Pump Keymark certificates — EHPA / DIN CERTCO (Heat Pump KEYMARK) · accessed 29 Sept 2026
- List of eligible heat pumps (BEG) — Bundesamt für Wirtschaft und Ausfuhrkontrolle (BAFA) · accessed 18 Oct 2026
- European Product Registry for Energy Labelling (EPREL) – heat pumps — Europese Commissie · accessed 15 Oct 2026