10 About the Boiler
The following table lists the product information requirements (EU regulation No 811/2013 and No 813/2013)
KD Navien Symbol Unit NCB700-42C NCB700-54C
Condensing boiler YES YES
Low-temperature (**) boiler NO NO
B1 boiler NO NO
Cogeneration space heater NO NO
Combination heater YES YES
Rated heat output P
rated
kW 34 34
Seasonal space heating energy efficiency η
s
%
Useful heat output
At rated heat output
and high-temperature regime (*)
P
4
kW 34.0 34.0
At 30 % of rated heat output
and low-temperature regime (**)
P
1
kW 10.2 10.2
Useful efficiency
At rated heat output
and high-temperature regime (*)
η
4
%
At 30 % of rated heat output
and low-temperature regime (**)
η
1
%
Auxiliary electricity consumption
At full load elmax kW
At part load elmin kW
In standby mode P
SB
kW
Other items
Standby heat loss P
stby
kW
Ignition burner power consumption P
ign
kW
Annual energy consumption Q
HE
GJ
Sound power level, indoors L
WA
dB
Emissions of nitrogen oxides NO
x
mg/kWh
For combination heaters
Declared load profile
Daily electricity consumption Q
elec
kWh
Annual electricity consumption AEC kWh
Water heating energy efficiency η
wh
%
Daily fuel consumption Q
fuel
kWh
Annual fuel consumption AFC GJ
Contact details Navien LTD, Building 2, Guildford Business Park, Guildford, GU2 8XH
(*) 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.
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