110V Thermo-switch. Need advice

Discussion in 'The Garage' started by nomad guy, Feb 7, 2014.

  1. nomad guy

    nomad guy A legal alien

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    Hi All,

    Part of a remodel project at a customer's house is an audio room.
    Basically a large closet size room where all the electronics are going to reside on a designated rack.
    A temp of no more then 75F needs to be maintained in the room.
    We installed a Panasonic 50cfm Whisper Ceiling exhaust fan.
    I need a a thermo-switch to control the fan.
    It needs to fit either in a single/double gang box or inside the fan housing.
    Any ideas of a model and where to source would be welcomed.
    #1
  2. _cy_

    _cy_ Long timer

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  3. broncobowsher

    broncobowsher Long timer

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  4. nomad guy

    nomad guy A legal alien

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    Thanks, guys. Very helpful.
    I guess a trip to Grainger is in my near future.
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  5. D.T.

    D.T. Difficult but useful

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    Try Amazon. Grainger is a rip off. Close on rise (75 or less) switch.

    Are you sure a ceiling fan will supply enough cooling?
    #5
  6. bmwdon75

    bmwdon75 Street Adventurist

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  7. trailer Rails

    trailer Rails Long timer

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    It should as long as the house does not get above 75.
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  8. D.T.

    D.T. Difficult but useful

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    Depends on how much heat the audio equipment emits, the size of the room, insulation and ventilation in the room etc...

    http://www.energystar.gov/?c=roomac.pr_properly_sized

    Ceiling EXHAUST to atmosphere fan not a regular ceiling fan. :fpalm My bad.

    http://www.amazon.com/Thermostat-Sw...qid=1391867492&sr=8-2&keywords=thermal+switch

    Cheapest one I could find.

    http://www.amazon.com/White-Rodgers...67656&sr=8-9&keywords=line+voltage+thermostat

    Watch out for cool breezes behind walls that will mess up the thermostat control.
    #8
  9. Patriot4570

    Patriot4570 Trail Blaster

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    Grainger is the way to go .There is a store about 3 miles from the crib.They have a lot of items and will test stuff out for you. I had an air compressor that had a bad capacitor they tested it and I got it running with a new one.
    #9
  10. Midnightventure

    Midnightventure -

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    Air moving in a closed space will actually raise the temperature. Especially with the electronics the air needs to be changed or air conditioned.
    #10
  11. trailer Rails

    trailer Rails Long timer

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    Retread the first post, he is using an exhaust fan.
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  12. Spam16v

    Spam16v Squid Rocket

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    how about a regular thermostat and a relay?
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  13. broncobowsher

    broncobowsher Long timer

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    Don't forget a power supply to run the thermostat as well. Getting complicated for something that there are off the shelf parts to make work just fine.
    #13
  14. trailer Rails

    trailer Rails Long timer

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    You don't need all of that, they make 110v thermostats for baseboard heaters.
    #14
  15. broncobowsher

    broncobowsher Long timer

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    That cycles backwards from what the OP is desiring. Baseboard thermostats open on rise, the OP needs the contacts to close on temperature rise.

    I was pointing out the post above about using a relay with a regular thermostat. You would also need to add a power supply that could run the thermostat and relay, thus overly complicated.
    #15
  16. trailer Rails

    trailer Rails Long timer

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    Oops, yea, backward. Wonder if they make 110v cooling thermostats?
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  17. Spam16v

    Spam16v Squid Rocket

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    I say again how about a regular thermostat? Mine runs on 2 AA batteries. Simple 110v relay...problem solved...
    #17
  18. broncobowsher

    broncobowsher Long timer

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    More then likely the 2AA is a backup. You would still need a power supply to power the relay. The thermostat is just a switch, you need power for that switch to turn on and off. Not line voltage for a regular thermostat or we would not need this thread.

    So yes, your thermostat has 2AA batteries in it. I have owned several that didn't even have that. How long would a pair of AA batteries last powering a relay (if it even worked that way, which it doesn't)? I can get a couple hours out of a standard flashlight on a pair of AAs. A good relay will suck more power then a tiny incandescent bulb. So there are too many flaws in this plan. Give up on a standard thermostat. Yes, it can be made to work. But isn't simple, and there are simple solutions to this problem.
    #18
  19. BrianCa

    BrianCa airheads and stuff.

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  20. Plaka

    Plaka Brevis illi vita est

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    You got 50CFM worth of air inlet (low down) to the room, right?
    #20