Thermann 21R Continuous Flow 50C Natural Gas
The Thermann 21R Continuous Flow 50°C Natural Gas system delivers energy-efficient, instantaneous hot water tailored for modern homes. With a high 6.1-star energy rating and Japanese-manufactured internal components, this system ensures consistent hot water supply at a pre-set safe temperature of 50°C, making it ideal for families or households requiring safe, reliable, and efficient performance. Its compact wall-mounted design allows for seamless outdoor installation, and it includes advanced frost protection features.
FEATURES:
Heating Method:
Gas burner with direct electronic ignition
Hot Water Supply:
Continuous flow – instantaneous hot water on demand
Recovery Time:
Instantaneous; no storage tank, heats water as needed
Installation Location:
Outdoor wall-mounted only
Water Pressure:
Energy Efficiency:
6.1 Star energy rating
Operating Costs:
Reduced due to high thermal efficiency and low standby loss; safe 50°C delivery minimizes unnecessary reheating
Best for:
Number of Bathrooms and People (Capacity):
Additional features:
| Hot Water Delivery: | 21L/min @ 25°C rise |
| Gas Consumption: | 159 MJ/h (Natural Gas) |
| Weight (Empty) | 15 kg |
| Height | 520 mm |
| Width | 350 mm |
| Depth | 170 mm |
| Manufacturers Tank Warranty (Domestic) | 12 years on the heat exchanger |
| Manufacturers Parts & Labour Warranty (Domestic) | 3 Years |
| Powerpoint Required: | Yes – 230–240V AC, 50Hz (max output current: 0.44 A) |
| Gas Connection: | R3/4" (20mm) |
| Hot Water Connection: | R3/4" (20mm) |
| Relief Valve Pressure: | 1620 kPa |
| Minimum Flow Rate for Ignition: | 2.5 L/min |
| Test Point Pressure: | 0.62 kPa |
| Water Inlet Connection: | R 3/4" (20 mm) |
| Freeze Prevention Heater Power: : | 129W |
| Input Current: | 0.44 A |
| Test Point Pressure (NG): | 0.62 kPa |