Navien NCB700-2S Plus 42K Installation & Operation Manual page 11

The following table lists the product information requirements (EU regulation No 811/2013 and No 813/2013)
KD Navien
Condensing boiler
Low-temperature (**) boiler
B1 boiler
Cogeneration space heater
Combination heater
Rated heat output
Seasonal space heating energy efficiency
At rated heat output
and high-temperature regime (*)
At 30 % of rated heat output
and low-temperature regime (**)
At rated heat output
and high-temperature regime (*)
At 30 % of rated heat output
and low-temperature regime (**)
At full load
At part load
In standby mode
Standby heat loss
Ignition burner power consumption
Annual energy consumption
Sound power level, indoors
Emissions of nitrogen oxides
Declared load profile
Daily electricity consumption
Annual electricity consumption
Water heating energy efficiency
Daily fuel consumption
Annual fuel consumption
Contact details
(*) High-temperature regime means 60 °C return temperature at heater inlet and 80 °C feed temperature at heater outlet.
(**) Low temperature means for condensing boilers 30 °C, for low-temperature boilers 37 °C and for other heaters 50 °C return temperature (at heater inlet).
Specific precautions
Read the user's information and installation manual before the application is assembled, installed or maintained.
Symbol Unit
P kW
rated
η %
s
Useful heat output
P kW
4
P kW
1
Useful efficiency
η %
4
η %
1
Auxiliary electricity consumption
elmax kW
elmin kW
P kW
SB
Other items
P kW
stby
P kW
ign
Q GJ
HE
L dB
WA
NO mg/kWh
x
For combination heaters
Q kWh
elec
AEC kWh
η %
wh
Q kWh
fuel
AFC GJ
Navien LTD, Building 2, Guildford Business Park, Guildford, GU2 8XH
NCB700-2S+/42K NCB700-3S/54K
YES
NO
NO
NO
YES
34.7
94
34.4
11.3
88.7
98.8
0.051
0.025
0.003
0.089
28
70.3
51
22.9
XXL
0.2
44
85.8
28.1
22
About the Boiler
YES
NO
NO
NO
YES
34.4
94
34.7
11.8
88.8
98.5
0.043
0.020
0.003
0.080
26
71.6
51
24
XXL
0.2
44
85.7
28.1
22
11