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

[Pat Horne]

Peter, at 73, I’m not as able to pick up net programming languages like I used to. I have some arduino applications that I need to build. After I finish my car restoration, hopefully this year, I’ll have time for programming. 

Keep well & cool. Only 95 here today. Better check the furnace!

Peace,
Pat

Pat Horne 
We support Habitat for Humanity


On Jul 30, 2020, at 8:01 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
> 
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