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Heat pumps · MT

Buderus WLW186i-15 MBE+ AR E

Buderus WLW186i-15 MBE+ AR E
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The Buderus WLW186i-15 MBE+ AR E is an air-to-water heat pump with a SCOP of 5.02 (35 °C) and a sound power level of 50 dB(A).1

Last updated: Technical specificationsRules in Malta⇄ Compare this model
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SCOP (35 °C)
5.021

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

Heating capacity (A7/W35)
6.39kW1
Official source
Outdoor unit sound power
50dB(A)1
Official source
Refrigerant
R2901
Official source
Type (source)
Air-to-water1
Official source
MT

Rules in Malta

Water Heater Scheme (heat pump water heaters)

Unknown

REWS runs a national grant scheme for energy-efficient water heaters in homes; heat pump water heaters are eligible (alongside solar water heaters). The scheme has been extended to 31 December 2026, and part A of the application must be submitted before you buy and install the equipment. Grant amounts: see the REWS page (not verified by us).

Technical specifications

General
Type (source)Air-to-water1
Performance
Heating capacity (A7/W35)6.39 kW1
Rated output 35 °C15 kW1
Rated output 55 °C15 kW1
Min. outdoor temperature-22 °C1
Efficiency
SCOP (35 °C)5.021
SCOP (55 °C)3.991
Seasonal efficiency ηs 35 °C198 %1
Seasonal efficiency ηs 55 °C157 %1
Energy label 35 °CA+++1
Energy label 55 °CA+++1
COP A7/W355.381
Noise
Outdoor unit sound power50 dB(A)1
Indoor unit sound power31 dB(A)1
Refrigerant
RefrigerantR2901
Refrigerant GWP31
Refrigerant charge1.7 kg1

How it ranks

SCOP (35 °C): better than 79% of comparable models in our database (Heat pumps · Air-to-water · ≥ 14 kW; n = 208).

Rank 41 of 209

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 4 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:

  • WLW186i-15 MBE+ AR E
  • WLW186i-15 MBE+ AR E W
  • WLW186i-15 MBE+ AR TP70 — Indoor unit sound power: 39 dB(A)
  • WLW186i-15 MBE+ AR TP70 W — Indoor unit sound power: 39 dB(A)

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Frequently asked questions

Which refrigerant does the Buderus WLW186i-15 MBE+ AR E use?

The Buderus WLW186i-15 MBE+ AR E uses R290.1

Sources

  1. Heat Pump Keymark certificates — EHPA / DIN CERTCO (Heat Pump KEYMARK) · accessed 29 Sept 2026
  2. Water Heater Scheme (heat pump water heaters) — Regulator for Energy and Water Services (REWS)