I have a single electrical distribution panel in an insulated metal panel building (a standalone shed) which has no active cooling or air vents. I need to determine whether the latter are required in a climate that has an average high and low temperatures in July of 22.6 and 7.0 degrees Celsius, respectively. A temperature of 28.5 has occurred in July in the recent past.

• The total calculated capacity of the steel distribution panel is 414 amps and the MCB rating is 100A (if this matters, I don't know). The Mains Breaker is listed as 160A/230/400V.

• The surface area (A) of the metal panel box is 0.855 m².

I need to understand how to calculate the maximum heat that will be emitted from this panel.

By my calculations, with a 1 degree C temperature difference between the outside and the inside of the room (not the panel), the heat transfer is 41.9 Btu/hour (the total surface area = 129 m²).

My question is, in July will the room temperature exceed 40 degrees C with the heat emitted from this electrical panel?