Flexible heating specialist
The CB high efficiency boilers are the best of both worlds. No compromises. An aesthetically pleasing design combined with a robust stainless steel heat exchanger with 10 years warranty. Installation cannot be easier: the CB units have a very compact and lightweight wall mounted design that makes it fit in even the smallest basements. The flip over display gives plenty of space to service the units and the control has many integrated options, like a cascade manager up to 16 units. Whether an outdoor reset, 0-10V, ModBus or OpenTherm connection is preferred: the CB units have standard connections available for all of them.
Features
✓ Extreme low NOx emission of less than 24 mg/kWh (2 credits under BREEAM 2018 NOx limit)
✓ Seasonal efficiency (Part L) close to 96%
✓ Stainless steel heat exchanger
✓ Compact wall hung boiler
✓ Full modulation of 5:1
✓ Cascade up to 16 boilers
✓ Natural or LP gas
✓ Easy installation and maintenance
✓ Also available as water heater
State of the art PCB technology
✓ Clear display with graphic design
✓ Modbus connection standard
✓ Easy to read fault history
✓ Internet and wifi connection optional
Popular specifications
| Boiler model | CB-85-CH | CB-105-CH | CB-125-CH | CB-155-CH | |
| Dimensions (h x b x d) | mm | 845 x 440 x 530 | |||
| Weight empty | kg | 77 | 79 | 83 | 86 |
| Flue connection concentric pipe | mm | 100/150 | 100/150 | 100/150 | N/A |
| Flue connection twin pipe | mm | 100 | 100 | 100 | 150 |
| Nominal input (Net) | kW | 15,4 – 81,7 | 18,6 – 97,3 | 23,6 – 119,4 | 35,0 – 145,3 |
| Nominal input 80/60°C | kW | 14,9 – 79,1 | 18,0 – 94,2 | 22,9 – 115,7 | 33,9 – 140,9 |
| Efficiency (input 30%, return 30°C) | % | 108,2% | 108,4% | 108,4% | 108,6% |
| Nitrogen Dioxide Emission (NOx) | mg/kWh | 23,1 | 21,3 | 23,9 | 20,1 |
General
| Boiler model | CB-85-CH | CB-105-CH | CB-125-CH | CB-155-CH | |
| Dimensions (h x w x d) | mm | 845 x 440 x 530 | |||
| Water content (estimated) | liter | 5,0 | 6,5 | 8,3 | 10,4 |
| Weight (empty) | kg | 77 | 79 | 83 | 86 |
| Supply /return connection (boiler) | inch | 1” | 1” | 1” | 1 ¼” |
| Gas connection | inch | ¾” | ¾” | ¾” | 1” |
| Flue connection twin pipe | mm | 100 | 100 | 100 | 150 |
| Flue connection concentric pipe | mm | 100/150 | 100/150 | 100/150 | N.A. |
| Gas appliance type | – | B23(P), C13, C33, C43, C53, C63, C83, C93 | |||
Heating
| Boiler model | CB-85-CH | CB-105-CH | CB-125-CH | CB-155-CH | |
| Nominal input net G20 | kW | 15,4 – 81,7 | 18,6 – 97,3 | 23,6 – 119,4 | 35,0 – 145,3 |
| Nominal output G20 (80-60) | kW | 14,9 – 79,1 | 18,0 – 94,2 | 22,9 – 115,7 | 33,9 – 140,9 |
| Nominal output G20 (50-30) | kW | 16,0 – 85,1 | 19,5 – 101,8 | 24,7 – 124,7 | 36,4 – 151,0 |
| Nominal output G20 (37-30) | kW | 16,6 – 88,4 | 20,2 – 105,5 | 25,6 – 129,7 | 38,0 – 157,8 |
| Turndown ratio | 1:x | 5 | 5 | 5 | 4 |
| Efficiency (input 30%, return 30°C) | % | 108,2% | 108,4% | 108,4% | 108,6% |
| Seasonal efficiency (Part L) | % | 95,6% | 95,7% | 95,7% | 95,8% |
| Seasonal space heating energy efficiency (ɳs) | % | 92,4% | 92,6% | 92,7% | 92,9% |
Gas consumption
| Boiler model | CB-85-CH | CB-105-CH | CB-125-CH | CB-155-CH | ||
| G20 | m3/h | 1,6 – 8,5 | 1,9 – 10,2 | 2,5 – 12,5 | 3,7 – 15,3 | |
| G31 | m3/h | 0,6 – 3,2 | 0,8 – 3,9 | 1,0 – 4,8 | 1,6 – 15,7 | |
| Gas supply pressure nominal | G20 | mbar | 20 | |||
| G31 | mbar | 37 | ||||
Emission
| Boiler model | CB-85-CH | CB-105-CH | CB-125-CH | CB-155-CH | |
| NOx class | – | 6 | |||
| Nitrogen Dioxide Emission (NOx) 1 | mg/kWh | 23,1 | 21,3 | 23,9 | 20,1 |
| Flue gas temperature at combustion air temperature of 20 °C | °C | 60 – 90 | |||
| Available pressure for the flue system2 | Pa | 200 | |||
| Noise level | dB(A) | 65,8 | 68,0 | 67,8 | 73,0 |
| 1 These numbers are used to assign two credits according to the BREEAM 2018 standards 2 Maximum allowed combined resistance of flue gas and air supply piping at high fire |
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Installation
| Boiler model | CB-85-CH | CB-105-CH | CB-125-CH | CB-155-CH | |
| Maximum supply temperature | °C | 90 | |||
| Resistance water heater ΔT = 20 °C | mWc | 4,0 | 3,4 | 3,8 | 3,6 |
| Resistance water heater ΔT = 25 °C | mWc | 2,8 | 2,3 | 2,5 | 2,4 |
| Pressure boiler | bar | 1,0 – 6,0 | |||
Electric
| Boiler model | CB-85-CH | CB-105-CH | CB-125-CH | CB-155-CH | |
| Maximum power consumption | W | 190 | 280 | 280 | 280 |
| Power supply | V/Hz | 230 / 50 | |||
| Protection class | – | IPX4D | |||
CB CH Cascade product info
Modular customized system for any boiler room
The incorporated cascade regulator makes the CB CH the ideal boiler for cascade systems up to twelve boilers. Simple looping and straight-forward connections make the installation easy. With the supplied cascade rack, a capacity of more than two megawatts can be installed in the most inaccessible areas. The system is equipped with adjustable legs and does not have to be anchored to the wall.
Features cascade
✓ Complete cascade set including assembly manual
✓ Water-side supply and return pipe
✓ Open distributor
✓ Gas-side distributor
✓ Open distributor sensor
✓ Connection set for the individual boilers
✓ Common flue system available
Popular specifications
| Boiler model | CB-85-CH | CB-105-CH | CB-125-CH | CB-155-CH | |
| Dimensions (h x b x d) | mm | 845 x 440 x 530 | |||
| Weight empty | kg | 77 | 79 | 83 | 86 |
| Flue connection concentric pipe | mm | 100/150 | 100/150 | 100/150 | N/A |
| Flue connection twin pipe | mm | 100 | 100 | 100 | 150 |
| Nominal input (Net) | kW | 15,4 – 81,7 | 18,6 – 97,3 | 23,6 – 119,4 | 35,0 – 145,3 |
| Nominal input 80/60°C | kW | 14,9 – 79,1 | 18,0 – 94,2 | 22,9 – 115,7 | 33,9 – 140,9 |
| Efficiency (input 30%, return 30°C) | % | 108,2% | 108,4% | 108,4% | 108,6% |
| Nitrogen Dioxide Emission (NOx) | mg/kWh | 23,1 | 21,3 | 23,9 | 20,1 |
General
| Boiler model | CB-85-CH | CB-105-CH | CB-125-CH | CB-155-CH | |
| Dimensions (h x w x d) | mm | 845 x 440 x 530 | |||
| Water content (estimated) | liter | 5,0 | 6,5 | 8,3 | 10,4 |
| Weight (empty) | kg | 77 | 79 | 83 | 86 |
| Supply /return connection (boiler) | inch | 1” | 1” | 1” | 1 ¼” |
| Gas connection | inch | ¾” | ¾” | ¾” | 1” |
| Flue connection twin pipe | mm | 100 | 100 | 100 | 150 |
| Flue connection concentric pipe | mm | 100/150 | 100/150 | 100/150 | N.A. |
| Gas appliance type | – | B23(P), C13, C33, C43, C53, C63, C83, C93 | |||
Heating
| Boiler model | CB-85-CH | CB-105-CH | CB-125-CH | CB-155-CH | |
| Nominal input net G20 | kW | 15,4 – 81,7 | 18,6 – 97,3 | 23,6 – 119,4 | 35,0 – 145,3 |
| Nominal output G20 (80-60) | kW | 14,9 – 79,1 | 18,0 – 94,2 | 22,9 – 115,7 | 33,9 – 140,9 |
| Nominal output G20 (50-30) | kW | 16,0 – 85,1 | 19,5 – 101,8 | 24,7 – 124,7 | 36,4 – 151,0 |
| Nominal output G20 (37-30) | kW | 16,6 – 88,4 | 20,2 – 105,5 | 25,6 – 129,7 | 38,0 – 157,8 |
| Turndown ratio | 1:x | 5 | 5 | 5 | 4 |
| Efficiency (input 30%, return 30°C) | % | 108,2% | 108,4% | 108,4% | 108,6% |
| Seasonal efficiency (Part L) | % | 95,6% | 95,7% | 95,7% | 95,8% |
| Seasonal space heating energy efficiency (ɳs) | % | 92,4% | 92,6% | 92,7% | 92,9% |
Gas consumption
| Boiler model | CB-85-CH | CB-105-CH | CB-125-CH | CB-155-CH | ||
| G20 | m3/h | 1,6 – 8,5 | 1,9 – 10,2 | 2,5 – 12,5 | 3,7 – 15,3 | |
| G31 | m3/h | 0,6 – 3,2 | 0,8 – 3,9 | 1,0 – 4,8 | 1,6 – 15,7 | |
| Gas supply pressure nominal | G20 | mbar | 20 | |||
| G31 | mbar | 37 | ||||
Emission
| Boiler model | CB-85-CH | CB-105-CH | CB-125-CH | CB-155-CH | |
| NOx class | – | 6 | |||
| Nitrogen Dioxide Emission (NOx) 1 | mg/kWh | 23,1 | 21,3 | 23,9 | 20,1 |
| Flue gas temperature at combustion air temperature of 20 °C | °C | 60 – 90 | |||
| Available pressure for the flue system2 | Pa | 200 | |||
| Noise level | dB(A) | 65,8 | 68,0 | 67,8 | 73,0 |
| 1 These numbers are used to assign two credits according to the BREEAM 2018 standards 2 Maximum allowed combined resistance of flue gas and air supply piping at high fire |
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Installation
| Boiler model | CB-85-CH | CB-105-CH | CB-125-CH | CB-155-CH | |
| Maximum supply temperature | °C | 90 | |||
| Resistance water heater ΔT = 20 °C | mWc | 4,0 | 3,4 | 3,8 | 3,6 |
| Resistance water heater ΔT = 25 °C | mWc | 2,8 | 2,3 | 2,5 | 2,4 |
| Pressure boiler | bar | 1,0 – 6,0 | |||
Electric
| Boiler model | CB-85-CH | CB-105-CH | CB-125-CH | CB-155-CH | |
| Maximum power consumption | W | 190 | 280 | 280 | 280 |
| Power supply | V/Hz | 230 / 50 | |||
| Protection class | – | IPX4D | |||