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If you are talking about "Attic Fans" as in either gable vent or roof mounted, the ones I have are hardwired in and have their own thermostat and humistat (sp) that come on automatically according to the settings I set. Therefore there is no need to have them on a switched line. I think it would be a real pain to have to remember to turn them on and off all the time. Just my 2¢.
He may be talking about a whole house ventilating fan mounted in the ceiling joist bays below the attic in which case a switched receptacle could be used.
We had to replace our roof due to hail and the existing roof vent fans were trashed. I thought that I might save some attic time by pre wiring with plugs and then just plug the replacements into the existing outlet that's up there.
Turns out I just hardwired them today when the roofers put the new ones on the deck. Wow it was hot up there. Thanks for the responses.
I have an electric attic fan.
I have it wired to an on/off switch down in the utility room.
This way, I can shut the fan off completely during the winter
I can turn it on during the summer and rely upon the thermostat
to turn it on/off as needed.
I believe my fan is hard wired into a box. then the wire is routed to the on/off switch.
Having a switched outlet up in the attic is another option.
The only reason I would have it switched or connected with a plug/outlet (and I would) is to make it easier for replacement. It's just safer for the electrician or whoever is replacing it to be able to completely disconnect power.