Gas condensing boiler Crystal III 20/20 kW combi
CRYSTAL III
CRYSTAL III – a modern condensing boiler that combines the highest efficiency, user comfort, and safe operation.
Thanks to advanced flame modulation technology, a soft ignition function, and quiet operation, CRYSTAL III perfectly adapts to your home's current heating needs. This economical and exceptionally ecological solution is suitable for both new buildings and modernized heating systems. Choosing the CRYSTAL III boiler ensures not only thermal comfort but also real savings in everyday operation. - Energy class: A
- OPEN-THERM communication system
- Remote control of boiler parameters from a room thermostat
- Modern, high-efficiency heat exchanger
- Single-coil heat exchanger made of stainless steel
- Cascade operation possible (up to 4 boilers)
- Highly efficient circulation pump
- Fan with variable speed control (electronically controlled)
- Stainless steel cylindrical burner with low NOx emissions (Class 6)
- Complete safety system
- Electronic flame modulation
- Compatible with multi-zone modules for heating systems
- Useful heat output at 30% nominal output P1 (for modulating boilers 30% arithmetic mean) [kW]:
- 6.3
- Sound power level LWA [dB]:
- 47.4
- Useful efficiency η1 [%]:
- 98.8
- Maximum water pressure [bar]:
- 3
- Boiler useful efficiency at nominal load and 70°C average water temperature [%]:
- 98
- Domestic water connection:
- G1/2
- Standard setpoint temperature [°C]:
- 40 - 80
- Nitrogen oxide (NOx) emission class:
- 6
- Overall dimensions (H x W x D) [mm]:
- 775 x 400 x 310
- Water heating energy efficiency ηwh [%]:
- 75
- Heating water and gas connection:
- G3/4
- Nominal heat input [kW]:
- 3,5 - 24,6
- Water pressure [bar]:
- 0,1 - 6,0
- Degree of protection (IP rating):
- IPX4D
- Useful heat output at nominal heat output P4 (for modulating boilers arithmetic mean of max and min) [kW]:
- 19.1
- Domestic water flow rate for Δt 30K [dm³/min]:
- 12
- Water temperature control range [°C]:
- 30 - 60
- Nitrogen dioxide emission level [mg/kWh]:
- 32.3
- Standby power consumption PSB [kW]:
- 0.005
- Seasonal space heating energy efficiency class:
- A
- Reduced setpoint temperature [°C]:
- 25 - 55
- Boiler weight [kg]:
- 33
- Heat load [kW]:
- 3,5 - 19,5
- Expansion vessel capacity [dm³]:
- 8
- Heat exchanger material:
- INOX stainless steel
- Heating capacity (at 50/30°C) [kW]:
- 3,8 - 21,0
- Electrical consumption at full load elmax [kW]:
- 0.08
- Type and voltage of electrical power supply:
- ~ 230 ±10%/ 50Hz V
- Electrical consumption at part load elmin [kW]:
- 0.062
- Maximum CH operating temperature [°C]:
- 95
- Load profile:
- L
- Seasonal space heating energy efficiency ηs [%]:
- 94
- Pump head at zero flow [bar]:
- 0.6
- Water heating energy efficiency class:
- A
- Useful efficiency η4 [%]:
- 91.6
- Heating capacity (at 80/60°C) [kW]:
- 3,4 - 19,1
- Nominal boiler heat output (at 80/60°C) [kW]:
- 3,4 - 24,1
- Minimum water flow [dm³/min]:
- 2
- Boiler useful efficiency at part load and 30°C return water temperature [%]:
- 108