Determining Thermal Power - Nordica MONOBLOCCO 400 PIANO Dx Gebrauchshandbuch

Monoblocco 400 Piano – 500 / 800 Angolo
15.

DETERMINING THERMAL POWER

There are no hard and fast rules on how to calculate the correct thermal power required. Thermal power depends on
the space to be heated and also largely on insulation. The average thermal output required for a reasonably well
insulated room is 40kCal/h per m³ (with outside temperature at 0° C).
As 1kW corresponds to 860kCal/h, we can calculate a value of 50W/m³.
If you wish to heat a room of 150 m³ (10 x 6 x 2.5 m) in an insulated house, you will require 150m
or 7.5kW. A 10kW device will therefore be sufficient for heating .
Fuel
Dry wood (15% humidity)
Wet wood (50% humidity)
Wood briquettes
Brown coal briquettes
Normal anthracite
Coke
Natural gas
Naphta
Electricity
6098401 – EN
Approximate combustion
value
Unit kCal
kg 3600
kg 1850
kg 4000
kg 4800
kg 7700
kg 6780
3
m 7800
L 8500
kW/h 860
Quantity required in relation to 1 kg
of dry wood
kW
4.2
2.2
5.0
5.6
8.9
7.9
9.1
9.9
1.0
3 3
x 50W/m = 7500W
1.00
1.95
0.84
0.75
0.47
0.53
0.46
0.2
4.19
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