<div dir="ltr"><div>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.<br></div><div><br></div><div>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?)<div><br></div><div>I know, Pat's heart bleeds for me.</div><div></div></div><div><br></div><div>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.</div><div><br></div><div>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!</div><div><br></div><div>-Peter</div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Thu, Jul 30, 2020 at 10:18 AM Pat Horne <<a href="mailto:patintexas@icloud.com">patintexas@icloud.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div dir="auto">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. <div><br></div><div>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. </div><div><br></div><div>Peace,</div><div>Pat<br><br><div dir="ltr">Pat Horne <div>We support Habitat for Humanity</div><div><br></div></div><div dir="ltr"><br>On Jul 30, 2020, at 5:34 AM, <a href="mailto:eric@megageek.com" target="_blank">eric@megageek.com</a> wrote:<br><br></div><div dir="ltr"><font size="2" face="sans-serif">I have an attic fan that is on a thermostatic
switch.</font>
<br>
<br><font size="2" face="sans-serif">I was wondering if there was a way that
I can have it on a thermostatic switch AND a remote switch (like
X-10)</font>
<br>
<br><font size="2" face="sans-serif">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.</font>
<br>
<br><font size="2" face="sans-serif">But I do want it to go on if it gets
too hot when I'm not home.</font>
<br>
<br><font size="2" face="sans-serif">Is there anything like this on the market?
I also couldn't figure out how to wire 2 separate switches safely
to accomplish this.</font>
<br>
<br><font size="2" face="sans-serif">Any ideas?</font>
<br><font size="2" face="sans-serif"><br>
Thanks.</font>
<br>
<br><font size="2" face="sans-serif">Mule<br>
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