Question Setting the temperature cut in for fans.

Discussion in 'Home Cinema Building DIY' started by Harkon321, Apr 12, 2017.

  1. Harkon321

    Harkon321
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    I've set up some cooling fans on top of my Denon 4200. I've placed the temperature probe directly on top of the vents.

    Any suggestions at what temperature I should set the fans to click on. I originally went for just above room temperature but of course they're on all the time! Currently opted for 28 degrees C but welcome ideas.
     
  2. jfinnie

    jfinnie
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    28'C would be fine, most kit is specced to operate in an environment of 35-40'C.

    But fans tend to be less noticeable running very slowly all the time, rather than coming in and out frequently. Frequent start-stops also shorten the lives and make the bearings become noisier, quicker.

    I'd get the very quietest 12V fans I could find that start up reliably at 5V and run them off a quality 5V USB supply with a modified cable.

    If you're resting them on top of a metal surface you want to make sure they're not using that surface as a speaker, silicone mounts can reduce the effect but ideally you don't want them resting on a resonant surface.
     
  3. Plasma Dan

    Plasma Dan
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    I have my rack cabinet set to switch on the fans at 26.7°C; Google's recommended temperature for data centres (apparently). :p My controller switches the fans off when the temperature has dropped by 2°C. This maintains a nice stable rack temperature (unless there's a heatwave).

    Dan.
     
  4. Harkon321

    Harkon321
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    Thanks all. Watched a film last night and they did a good job of both keeping the amp noticeably cooler and I never heard them. Seems to work well. There's scope to add another at the rear if I need to, but hopefully this seems to work.
     

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