Specifications

Enclosure heaters
Project planning
31Rittal System Climate Control
Enclosure heaters
The required thermal output is calculated from
Heating performance diagram
Q
H
= Thermal output (W)
A = Enclosure surface area to IEC 890 (m
2
)
ΔT = Temperature difference (K)
Based on:
Indoor siting, static air,
heat transfer coefficient k = 5.5 W/m
2
K
For outdoor siting (moving air): Double the thermal output.
Q
H
= A  ΔT  k
.
A
ΔT
1
1.5
2
3
4
5
6
8
10
15
30 50
150 300 500
10
20 40 60
80 100 200
20
30
2
5
7.5
10
15
Q
H
.
.
3.7