How to cool a computer closet? - AVS Forum
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post #1 of 3 Old 04-25-2013, 09:30 AM - Thread Starter
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I'm in discussions right now about building a new home. The plan right now is to build a home theater/media room approximately 13' x 20'. There will be a door leading from this room into the single car bay of a 3 car garage. The single car bay will be walled off and insulated from the rest of the garage. My plan is to put the computer closet in this room. I figured that the closet will be approximately 4' x 4'.

I would like to keep my desktop computer, as well as my server that streams out to the rest of the house. How can I cool the closet adequately? It's new construction, so all possibilities are potentially on the table. Should I run a vent off of the air-conditioning into the closet? Fans? I live in the southwest desert, so it's not uncommon to hit over 100F on summer days here.

Basically, I'm a computer guy. I know jack squat about HVAC and home cooling...smile.gif
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post #2 of 3 Old 04-27-2013, 08:13 AM
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I run multiple servers in my basement and the most important part of 'cooling' is extracting the waste heat and keeping good air flow. If new construction, are/can they place a vent or return in there?

I believe the simplest and cheapest solution (to be effective) is having a temperature controlled small inline vent fan above the computers / in ceiling that extracts the waste heat and moves the top layer of air in the room into the adjoining garage bay. If not temperature controlled, just run a small fan to move air into the garage 24/7. If the area is 'conditioned' to the rest of the house, place an insulated (keeps noise down) grate near the floor from the house into the storage room to pull in cool air, which should always be in the 60's (if this is your ground floor and no basement)) therefore you're not adding $30-100 a month in additional cooling for a tiny room if you had a dedicated cooling unit.

We had a mini-split built for my first business for a small server room and it was an icebox, which is a bit overkill.

You can use a furnace return grate in the ceiling of the room and a grate close to the floor to the house to move air from low to high and out. During the winter, I would just leave the room alone and the temp wouldn't get too bad. During the rest of the year, I just ran the furnace fan 24/7 to move air with a return above the servers and this was effective and cheaper than running a dedicated HVAC minisplit. It's possible that I may be reducing the lifespan of furnace fan by running it 24/7, but to me better that burning up a server.
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post #3 of 3 Old 04-27-2013, 10:45 AM
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I would just vent the closet into the room and let the AC serving the room handle it. Two vents, one near the floor and one near the ceiling will do it by convection.
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