NORITZ Tankless Water Heater, Model GQH-27H8FFAI
27kW Gas Combination Boiler, Built-in Wi-Fi
- Rated heat input 27 kW
- Rated heat output 24 kW
- Minimum heat output 8.1 kW
- Hot water flow (ΔT = 25°C) 12 L/min
With a built-in Wi-Fi control, the 27kW gas combination boiler is developed by Noritz as a smart heating solution for residential homes. It brings a practical balance between heating performance and overall cost, making it well-suited for everyday household use.
Compared to conventional water boilers, it delivers stronger heating capacity and higher domestic hot water supply. The Wi-Fi smart control integrated with the boiler also offers greater convenience in operation, which has contributed to its popularity as a smart wall-hung heating solution in the residential market.
| Model | GQH-27H8FFAI |
| Rated heat input | 27kW |
| Rated heat output | 24kW |
| Minimum heat output | 8.1kW |
| Minimum DHW output | 9.5kW |
| Thermal Efficiency | ≥89% |
| Hot water flow (△T=25℃) | 14L/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 | Yes |
Combustion Fan
Designed for broad compatibility, the fixed-speed fan delivers reliable start-up performance and stable operation under higher load conditions.
Electronic Controller
The controller ensures accurate temperature control and efficient operation. It also integrates multiple safety protections, user-friendly operation, and built-in fault diagnostics to support easier maintenance.
Sealed Combustion Chamber
Insulating and sound-dampening materials are applied to the unit’s side panels to reduce friction and vibration, helping protect internal components and limit operating noise.
Noritz Water Pump
The water pump operates at low noise levels to improve daily comfort and features smart self-protection functions that help reduce the risk of faults over time.
Five-Stage Heat Exchanger Design
A compact structure is combined with enlarged main tubes and an extended heat exchange path, allowing heat to be absorbed more fully and efficiently.
Italian SIT Proportional Valve
The Italian SIT proportional gas valve precisely regulates gas flow and pressure. With fast response and high control accuracy, it helps optimize combustion efficiency and reduce energy consumption.
Expansion Tank
The expansion vessel balances pressure fluctuations in the water system during rise and fall of the temperature and helps protect components to support stable long-term operation.
- 30-80°C wide heating range, suitable for a variety of residential heating scenarios
- Compatible with Japanese-style dry-installed underfloor heating for better heating system
- Stable hot water temperature, supporting multiple outlets without interference
- Built-in Wi-Fi smart control for remote monitoring and easy adjustment of system operation
- Active freeze protection for reliable heating during cold weather conditions
The Noritz H Series wall-hung boilers offer an integrated smart solution for space heating and domestic hot water. They are designed to meet the needs of multiple living areas, including kitchens, living rooms, bedrooms, and bathrooms. Compatible with Japanese-style dry-installed underfloor heating systems, they deliver fast heating performance for improved comfort. At the same time, the H Series addresses common limitations of traditional wall-hung boilers by enhancing overall temperature stability and supporting a more consistent whole-home hot water experience.
Headquartered in Japan, Noritz has focused on the research and development of heating systems and hot water technologies for more than half a century. Supported by proven HVAC manufacturing capabilities, we provide integrated solutions for smart underfloor heating and domestic hot water supply to distributors and engineering project partners worldwide.