Maximum temp. in data closet

[emalsyd]

Is there any way to predict what the temperature in a small data closet would get to if we didn't install any mechanical cooling?

We have a 6'x4' internal room on the first floor, conditioned rooms above. The owner is saying the btu load of the equipment is 11,800 btu and the max temperature the equipment can sustain is 90*. The general contractor is asking if we remove the ductless split in the space and install a louvered door, will the room stay under 90*. I'm not sure how you would figure something like this out.

 

[317069]

calculate not predict, also 90 what 90F or 90C, there is no temperature scale called 90*

 

[dbill74]

If the ONLY replacement for the ductless-split is the louver, then no it will not stay under 90°. You would need a way to circulate air through the room, which a single louver cannot do by itself. You would need an exhaust fans to accompany the louver. Before going down that road, you should ask the owner if he is okay with having a louvered door in that location.

I would also ask the contractor if you'd get a credit and owe him less. If his answer is no credit, then he is obligated to provide the ductless-split.
Contractors are notorious for this. If he insists, put the burden on him to prove the room will not exceed 90°F, and ask to see his engineering calculations.

 

[IRstuff]

Not sure what your contractor is smoking, but assuming your BTU value represents 3.5 kW dissipated inside a 2-ft cube with natural convection only, the temperature rise just against closet air temperature would be 340F. This neglects the transfer of heat out of the closet itself. Simplifications were made, so if the dissipative area was larger, say, a 3-ft cube, the temperature rise would be 151 F. Again, not including the temperature rise to the outside of the closet

TTFN
faq731-376

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[willard3]

The temperature will rise to the setpoint of the overtemmperature control and then what is in the closet will shut off and make no more heat.