Heater Calculation

Calculation of required heating performance

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1. Enclosure dimensions
H= in
W= in
D= in
2. Enclosure position
a)  
b)  
c)  
d)  
e)  
f)  
g)  
h)  
i)  
j)  
k)  
l)  
Enclosure surface area: ft2
3. Location of installation
4. Enclosure material
Heat transfer coefficient W/ft2K
5. Temperature differential

Variations in temperature (e.g. day-night, summer-winter, climate zones) have to be taken into account. Please enter the maximum temperature differential or determine the temperature differential in the enclosure based on the maximum allowable interior temperature (Ti) and the maximum expected ambient temperature (Tu):

Lowest ambient temperature °F
Desired interior temperature °F
Temperature differential K
6. Continuous stray power

The electrical load installed in enclosures (e.g. transformers, relays, semi-conductors, bus bars, etc.) generate heat when in operation. This self-warming is described as stray power, power loss or dissipation.

Continuous stray power W
7. Calculation
Heat transfer coefficient W/ft2K
Required heating performance W