Delay off timer?

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    Delay off timer?

    I'm installing a remote mounted exhaust vent for the bathroom in the attic. I'm looking a delay off timer, so when the switch is turned off the vent will still run for a set amount of time. Like 10 or 20 minutes, whatever I set it at initially.

    I know there are wall switches with built in timers, those are nice but I don't want it visible. I want a single switch for the vent and the vent will turn off later at a set time that can't be seen.

    What's out there that will work in this application?

    #2
    Mcmaster Carr has adjustable timed relays and sockets, 7268K47. Do you really need the fan to run for 20 min after taking a shit? A shower needs that long to clear the humidity but if 5 min doesn't clear the stench go see a Dr!

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      #3
      Originally posted by Firstram View Post
      Do you really need the fan to run for 20 min after taking a shit? A shower needs that long to clear the humidity but if 5 min doesn't clear the stench go see a Dr!
      EXACTLY what I was thinking!

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        #4
        Originally posted by Firstram View Post
        Do you really need the fan to run for 20 min after taking a shit? A shower needs that long to clear the humidity but if 5 min doesn't clear the stench go see a Dr!
        Creeping Death.

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          #5
          https://www.amazon.com/gp/product/B0...?ie=UTF8&psc=1

          Put that in the bathroom years ago.

          edit: missed the part about a visible switch.

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            #6
            Grainger has tons of adjustable delay off tdr's. Shouldn't be too hard to tuck one in the wall somewhere behind the switch.

            https://www.grainger.com/category/el...&filters=attrs

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              #7
              Originally posted by Firstram View Post
              Mcmaster Carr has adjustable timed relays and sockets, 7268K47. Do you really need the fan to run for 20 min after taking a shit? A shower needs that long to clear the humidity but if 5 min doesn't clear the stench go see a Dr!
              It's for the shower primarily. I like to shit, shower and shave all in a row for maximum efficiency.

              https://www.mcmaster.com/7268K47

              This is what you linked. Fawking expensive for what it is. So if I'm reading it right, it is adjustable up to 1800 seconds, or 30 minutes?

              Then I'll need one of these to go with it:
              https://www.mcmaster.com/7122K19

              With that relay socket and timer, can I control fans from two different bathrooms? In other words, can the one timer and 8 terminals be activated from 2 different switches?

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                #8
                Originally posted by AK_F250 View Post
                Grainger has tons of adjustable delay off tdr's. Shouldn't be too hard to tuck one in the wall somewhere behind the switch.

                https://www.grainger.com/category/el...&filters=attrs
                They don't appear to have any that are quite right. 10-12 minutes max then jump to 30 hours max.

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                  #9
                  Click image for larger version
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ID:	38584 This is what I use. This will do a ton of different timer setups. I use it as a off delay. This is the 120volt model. I use it to turn a 60hp pump on and off when the signal says we are feeding it sand or not. That way I don’t have clear water cleaning my sluice box out lol

                  the timer relay is the thing in the middle.

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                    #10
                    Originally posted by Deuce 40s View Post

                    With that relay socket and timer, can I control fans from two different bathrooms? In other words, can the one timer and 8 terminals be activated from 2 different switches?
                    Negative, it's a single relay with extra contacts. 2 sets NO and 2 sets NC but they all switch at the same time.

                    Edit: yes, 30min
                    Last edited by Firstram; 06-13-2020, 02:46 PM.

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                      #11
                      you could also put the fan on a humidity sensor switch
                      https://www.homedepot.com/p/Leviton-...-0LW/204734988

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                        #12
                        Reconsider using a standard push button type timer. Those remote bath fans are quiet, if someone forgets to turn the switch off your fan could run for days.

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                          #13
                          Originally posted by rockyota83 View Post
                          you could also put the fan on a humidity sensor switch
                          https://www.homedepot.com/p/Leviton-...-0LW/204734988
                          This would be nice but they're visible.

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                            #14
                            Originally posted by Firstram View Post
                            Reconsider using a standard push button type timer. Those remote bath fans are quiet, if someone forgets to turn the switch off your fan could run for days.
                            I'm not considering a push button type. I want it automatic, every time. I don't know why it has to cost $110+ though.

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                              #15
                              Originally posted by Firstram View Post

                              Negative, it's a single relay with extra contacts. 2 sets NO and 2 sets NC but they all switch at the same time.

                              Edit: yes, 30min
                              I don't know what NO and NC mean, but presumably I'd need to buy another timer and socket when I replace the fan in the other bathroom. This single fan has the capacity to vacate both at the same time but I don't think I want that.

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