**1. The problem statement, all variables and given/known data**

If you have a radio equipment cabin that has a heat load of 15kW and you wish to stop the temperature becoming more than 15°C hotter than outside, how much ‘free air’ (outside/atmospheric air) needs to be circulated inside the cabin per hour?

**2. Relevant equations**

Q = mC⌂T

C = 1.007

⌂T = -15

**3. The attempt at a solution**

I don’t know how to relate the m (usually a mass, right?) to a volume of air, as I assume that is the equations equivalent.

I hope that makes sense…

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