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We have an existing 120V AC exhaust fan wired to simple inline attic fan style thermostat. We would like to add a timer switch so the fan could be manually turned on as needed.

Would this be the correct way to add a timer switch?

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This is the sort of timer switch we are looking to add: 12 hour timer

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  • Is this for a fan in the attic, or is it for a repurposed attic-type fan?
    – mjohns
    Jul 23, 2015 at 23:06
  • It's a 300 CFM bathroom fan in the ceiling of a storage room that is vented out a side wall.
    – Marc M.
    Jul 23, 2015 at 23:39

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Yes, that is precisely correct. Though I prefer red tape, but that's a preference, not a requirement to go buy a roll. Nicer (IMHO) because you can easily mark switched hots whether they be black or white.

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  • I like the idea of using red tape, definitely makes it more visible. Thanks.
    – Marc M.
    Jul 23, 2015 at 23:44

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