The graph can be read to determine expected temperature rise.
Electrical enclosure heater calculator.
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For heat transfer from the outside calculate the area exposed to the atmosphere except for the top of the control panel.
For example if you know the power generated inside the unit assume 10 of the energy is dissipated as heat.
Find your enclosure s total surface area by entering its dimensions here.
The wattage of the heater you need is determined by the total surface area of your enclosure and the temperature rise you need to produce.
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You can use this calculator to find the wattage you need.
Determine the heat generated inside the enclosure.
Approximations may be necessary.
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Protect your critical enclosure assets from the harmful effects of low temperatures condensation and corrosion.
To use this calculator appropriately one must first quantify the amount of heat generated by components inside.
This calculator has a maximum temperature rise of 140 f or 78 c step 1.