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Ecoforest ecoAIR 3-18 PRO

The Ecoforest ecoAIR 3-18 PRO is an air-to-water heat pump with a SCOP of 4.3 (35 °C) and a sound power level of 57 dB(A).1,2,3

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SCOP (35 °C)
4.33

Seasonal efficiency: how much heat you get per kWh of electricity across a heating season.

Outdoor unit sound power
57dB(A)3
Official source
Refrigerant
R2901
Official source
Type (source)
Air-to-water1
Official source
Rated output 35 °C
11kW3
Official source

Technical specifications

General
Type (source)Air-to-water1
Compressors11
Capacity controldrehzahlregelung1
Performance
Rated output 35 °C11 kW3
Rated output 55 °C11 kW3
Efficiency
SCOP (35 °C)4.33
SCOP (55 °C)3.533
Seasonal efficiency ηs 35 °C169 %3
Seasonal efficiency ηs 55 °C138 %3
Energy label 35 °CA++3
Energy label 55 °CA++3
COP A7/W355.021
COP A2/W353.971
COP A-7/W353.31
Noise
Outdoor unit sound power57 dB(A)3
Refrigerant
RefrigerantR2901
Refrigerant GWP32
Refrigerant charge1.37 kg1
Electrical
Max. power input5.5 kW1
Connectivity & smart
SG ReadyYes1
Grants & market
ISDE grant (NL)3,700 €2

How it ranks

SCOP (35 °C): better than 2% of comparable models in our database (Heat pumps · Air-to-water · 10–14 kW; n = 308).

Rank 298 of 309

Compared with every model on VersusIndex in the same group with a known value; equal values do not count as better. This says nothing about price, installation or reliability.

Variants

This model is registered in 2 combinations (for example with a different indoor unit or cylinder) with exactly the same performance. All figures on this page apply to each of these types. The part of the type number that differs is in bold; small differences (e.g. cylinder volume or anode) are listed after it:

  • ecoAIR 3-18 PRO
  • ecoAIR T 3-18 PRO — Max. power input: 8.3 kW

Similar models

Other brands, same type and a comparable size.

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How we collect and check this data →

Frequently asked questions

Which refrigerant does the Ecoforest ecoAIR 3-18 PRO use?

The Ecoforest ecoAIR 3-18 PRO uses R290.1,2,3

Sources

  1. List of eligible heat pumps (BEG) — Bundesamt für Wirtschaft und Ausfuhrkontrolle (BAFA) · accessed Nov 8, 2026
  2. ISDE heat pump notification code list — Rijksdienst voor Ondernemend Nederland (RVO) · accessed Oct 25, 2026
  3. European Product Registry for Energy Labelling (EPREL) – heat pumps — Europese Commissie · accessed Oct 15, 2026