[Shop-talk] attic fan switches (does this exist?)

[Bruce Bubeck]

Peter,
Not sure if this was mentioned already but make sure that whatever switch
you use has a motor rating for the fan you have. Some of those switches are
only rated for lighting loads.
Bruce

On Thu, Jul 30, 2020 at 11:00 AM Peter Murray <peterwmurray at gmail.com>
wrote:

> My solution is to have a switch in-line with the thermostat, in our
> upstairs hallway. When I don't want to hear the fan at 11pm, I switch it
> off.
>
> My fan in my attic has the standard mechanical thermostat that came with
> it. I think I set it a hair too low, or the hysteresis is too broad,
> because it'll still be running at 11pm. Then again, we've had 27+ days of
> 90+ here in Northern Virginia. It is nearly 11am here now and 89 degrees,
> and the fan is not on yet. (Hmm, did I turn the switch back on?)
>
> I know, Pat's heart bleeds for me.
>
> I like the idea of making operation of the fan a bit more sophisticated,
> but writing Arduino code is likely more than my wife, 3 kids under 8 and
> self-employment will allow. I'm looking at Home Assistant and some Z-Wave
> devices, but need to do more research before I start spending on hardware.
>
> The problem I'd had was that I wanted the fan to run to reduce melting
> when we had ice dams developing at the roof edge. Of course, the proper
> solution is to improve my insulation up there!
>
> -Peter
>
> On Thu, Jul 30, 2020 at 10:18 AM Pat Horne <patintexas at icloud.com> wrote:
>
>> I’m not familiar with x-10 but I assume you will be using like a
>> controller for a table lamp where the output is a socket. If you have a
>> controller with isolated contacts it’s even easier.
>>
>> If you want the x-10 to override  the thermostat so that the fan runs
>> until you turn it off, all you need to do plug a relay into the controller
>> & wire its normally open contacts across the thermostat.
>>
>> Peace,
>> Pat
>>
>> Pat Horne
>> We support Habitat for Humanity
>>
>>
>> On Jul 30, 2020, at 5:34 AM, eric at megageek.com wrote:
>>
>> I have an attic fan that is on a thermostatic switch.
>>
>> I was wondering if there was a way that I can have it on a  thermostatic
>> switch AND a remote switch (like X-10)
>>
>> What happens is that  I want to turn on the fan on some nights or days,
>> but it isn't hot enough to trigger it to go off.  If I reduce the
>> temperature setting, it stays on most on the time.
>>
>> But I do want it to go on if it gets too hot when I'm not home.
>>
>> Is there anything like this on the market?  I also couldn't figure out
>> how to wire 2 separate switches safely to accomplish this.
>>
>> Any ideas?
>>
>> Thanks.
>>
>> Mule
>>
>> "Be as beneficent as the sun or the sea, but if your rights as a rational
>> being are trenched on, die on the first inch of your territory." Ralph
>> Waldo Emerson
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