Buderus WLW-4 MBB A H GBH172i
The Buderus WLW-4 MBB A H GBH172i is an air-to-water heat pump with a SCOP of 4.65 (35 °C) and a sound power level of 48 dB(A).1
Key figures
Rules in Malta
Water Heater Scheme (heat pump water heaters)
UnknownREWS 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) | 3.4 kW1 |
| Rated output 35 °C | 4.1 kW1 |
| Rated output 55 °C | 4 kW1 |
| Min. outdoor temperature | -22 °C1 |
| Efficiency | |
| SCOP (35 °C) | 4.651 |
| SCOP (55 °C) | 3.391 |
| Seasonal efficiency ηs 35 °C | 183 %1 |
| Seasonal efficiency ηs 55 °C | 133 %1 |
| Energy label 35 °C | A+++1 |
| Energy label 55 °C | A++1 |
| COP A7/W35 | 4.831 |
| Noise | |
| Outdoor unit sound power | 48 dB(A)1 |
| Indoor unit sound power | 46 dB(A)1 |
| Refrigerant | |
| Refrigerant | R2901 |
| Refrigerant GWP | 31 |
| Refrigerant charge | 1.13 kg1 |
How it ranks
SCOP (35 °C): better than 40% of comparable models in our database (Heat pumps · Air-to-water · 4–6 kW; n = 122).
Rank 70 of 123
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.
Similar models
Other brands, same type and a comparable size.
More from Buderus
- Buderus WLW-4 MBB A H SCOP (35 °C): 4.65
- Buderus Logaplus M WLW166i-4 MBB AR E (WLW-4 MBB AR & Logatherm WLW176i.2 E) SCOP (35 °C): 4.99
- Buderus WLW176i.2-4 MBB AR E SCOP (35 °C): 4.99
- Buderus Logatherm WLW196i-4 ARB SCOP (35 °C): 4.65
- Buderus Logatherm WLW196i-4 ARTP120 SCOP (35 °C): 4.39
- Buderus HC HYC20 IT-4 SCOP (35 °C): 4.34
How we collect and check this data →
Frequently asked questions
Which refrigerant does the Buderus WLW-4 MBB A H GBH172i use?
The Buderus WLW-4 MBB A H GBH172i uses R290.1
Sources
- Heat Pump Keymark certificates — EHPA / DIN CERTCO (Heat Pump KEYMARK) · accessed 29 Sept 2026
- Water Heater Scheme (heat pump water heaters) — Regulator for Energy and Water Services (REWS)