I'm trying to calculate how much cooling power I need to keep a server room (about $60 m^2$ with $3m$ height) in 25℃.

How exactly I should do this calculation?
I summed up wattage of all equipments and converted it to BTU/h.

  1. is this correct? do devices make heat as much as their wattage (at maximum of-course)?

Now How can I select Air conditioner for this room?
I think extracting 300 btu/h in a $10m^3$ differs from extracting same BTU/h in a $100m^3$

  1. How to decide how many air conditioners do I need?

can you please explain calculations needed for a general cooling problem?


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