NORITZ Tankless Water Heater, Model GQH-30H8FFA
30kW Gas Combination Boiler
- Rated heat input 30 kW
- Rated heat output 27.5 kW
- Minimum heat output 9.8kW
- Hot water flow (ΔT = 25°C) 16 L/min
This 30kW standard gas combination boiler is suitable for larger residential properties and projects located in colder climates. It delivers strong heating capacity with generous domestic hot water flow to ensure reliable comfort throughout the home.
With its higher heat output of 30kW, the heating system can effectively support floor heating or radiator systems. It is able to maintain stable operation, providing consistent performance and reliable heating even under low-temperature conditions during winter.
| Model | GQH-30H8FFA |
| Rated heat input | 30kW |
| Rated heat output | 27.5kW |
| Minimum heat output | 9.8kW |
| Minimum DHW output | 11.5kW |
| Thermal Efficiency | ≥89% |
| Hot water flow (△T=25℃) | 16L/min |
| Dimensions (H × W × D) | 740 × 440 × 310 mm |
| Weight | 32.5kg |
| Water-flow servo motors | 0 |
| Staged combustion | No |
| Circulation pump | 1 |
| 0.5oC temperature step control | No |
| Heating temperature range | 30-80℃ |
| Hot water temperature range | 35-60℃ |
| Noise level (sound power /sound pressure) | ≤53dB / ≤39dB |
| Wi-Fi | No |
Combustion Fan
A fixed-speed combustion fan is used for stable operation and broad system compatibility. It offers reliable start-up performance and operates effectively under higher-load conditions.
Electronic Controller
The controller provides precise temperature control and efficient system performance. It includes multiple safety protections, user-friendly controls, and built-in fault diagnostics to make troubleshooting and maintenance easier.
Sealed Combustion Chamber
The sealed combustion chamber incorporates insulation and sound-dampening materials to protect internal components and reduce operating noise. The H-series wall-hung boilers incorporate additional noise-reduction measures, with sound levels as low as 42 dB(A)*.
Noritz Water Pump
Noritz water pumps feature smart self-protection functions integrated that help minimize fault risks over time. They are designed for reduced operation noise to improve comfort in daily use.
Five-Stage Heat Exchanger Design
A five-pass heat exchanger helps maintain a compact structure while improving heat transfer efficiency. With enlarged main tubes and an extended heat exchange path, it allows more heat to be absorbed and utilized effectively.
Italian SIT Proportional Valve
An Italian SIT proportional gas valve regulates gas flow and pressure with precise and responsive control. This helps the burner operate more smoothly and waste less gas for improved efficiency.
Expansion Tank
The expansion tank absorbs pressure changes during the rise and fall of temperature in the water circuit. By stabilizing pressure, it protects key components and maintain consistent operation over time.
- 30-80°C wide heating range, adaptable to multiple rooms and seasonal demands
- Compatible with Japanese-style dry floor heating systems for better heating performance
- Stable hot water temperature, supporting multiple outlets without interference
- Designed with layered noise control to maintain quieter operation
- Active freeze protection for reliable performance in cold weather
The Noritz H Series wall-hung boilers provide an integrated solution for space heating and domestic hot water. They are suitable for multiple areas of the home, including the living room, kitchen, bedroom, and bathroom. Designed to work with Japanese-style dry-installed underfloor heating systems, they offer faster heat response and improved comfort. Compared with conventional wall-hung boilers, the H Series enhances the temperature stability and supports a more consistent whole-home hot water experience.
Whether delivering strong underfloor heating performance for larger spaces or ensuring stable domestic hot water for the whole household, Noritz relies on an established manufacturing system to provide high-performance HVAC products. With flexible OEM and ODM customization services for heating equipment, we support our partners in expanding into the global HVAC market.