INSERTO Crystal 50 – 50
VERTICALE
– 70 – 80 – 100
6096801 - Rev.09 – EN
29
15. SUMMER TIME
After having performed the cleaning of the hearth, of the stack and of the flue, by removing completely the ash and
other possible residuals, close all hearth doors and related registers.
It is suggested to perform the flue cleaning at least once a year; in the meantime, verify the actual state of the door
seals, which do not assure the good operation of the appliance, if they are not completely integral (i.e. if they do not
adhere anymore to the door)! Therefore, it is necessary to replace them.
In case of humidity of the room where the appliance is located, place the absorbing salts within the hearth.
Protect the internal cast iron parts with neutral Vaseline, if you wish to keep the aesthetic appearance unchanged in
time.
16. CALCULATION OF THE THERMAL POWER.
There is not an absolute rule for calculating the correct necessary power. This power is given according to the space
to be heated, but it depends also largely on the insulation. On an average, the calorific value necessary for a properly
insulated room is 40 kCal/h per m
3
(for an external temperature of 0 °C).
Given that 1 kW corresponds to 860 kCal/h, it is possible to adopt a value of 50 W/m
3
.
Let’s suppose that one wishes to heat a room of 150 m
3
(10 x 6 x 2.5 m) in an insulated apartment, it is necessary to
have 150 m
3
x 50 W/m
3
= 7500 W or 7.5 kW.
Therefore as main heating, a 10 kW appliance is sufficient.
Approximate combustion value
Quantity required for
1 kg of dry wood
Fuel
Unit
kCal
kW
Dry wood (15% humidity)
kg
3600
4.2
1.00
Wet wood (50% humidity)
kg
1850
2.2
1.95
Wood briquettes
kg
4000
5.0
0.84
Brown coal briquettes
kg
4800
5.6
0.75
Normal anthracite
kg
7700
8.9
0.47
Coke
kg
6780
7.9
0.53
Natural gas
m
3
7800
9.1
0.46
Naphtha
L
8500
9.9
0.42
Electricity
kW/h
860
1.0
4.19
