Buderus GB172i.2 series: Wall-Hung Condensing Boiler
Capacity table and technical specifications of every model in the Buderus GB172i.2 series.
The Buderus Logamax plus GB172i.2 series consists of wall-hung condensing boilers from 35 kW to 45 kW. They are used for the central heating of villas, detached houses and small commercial buildings.
The boilers are rated for 3 bar operating pressure. A low-loss header and an additional pump are recommended; a cylinder-priority system can be built with the RC310 controller and the MM100 module.
All models in the GB172i.2 series
| Model | SAP no. | Nominal heat output (kW) | |
|---|---|---|---|
| 50/30 °C | 80/60 °C | ||
| GB172i.2-35 | 7736902452 | 35.0 | 33.6 |
| GB172i.2-40 | 7736902503 | 40.0 | 39.8 |
| GB172i.2-45 | 7736902504 | 45.0 | 42.6 |
Values are the nominal heat outputs given in the manufacturer's price list (at 50/30 °C and 80/60 °C water temperatures). Data date: 2026-09-21.
Specifications
- Brand
- Buderus
- Series
- GB172i.2
- Type
- Wall-hung condensing boiler
- Fuel
- Natural gas (LPG with conversion kit)
- Operating pressure
- 3 bar
- Models
- 3 models (35 – 45)
Compatible accessories
7738114123RC310 controller, black (FA outdoor sensor included)7738111002MC400 cascade module (up to 4 boilers with RC310)7738113392MM100 zone module (1 cylinder or 1 heating circuit)5991376FV/FZ sensor (for heating circuit or low-loss header)7736702647MX400 module set (boiler control from the mobile app over Wi-Fi)