12v timer switch for bathroom exhaust fan

[mjeds]

anyone know if there is such a thing?

in my home I had one of those twist 110v 30-minute timers for the bathroom fan/heater, I would like the same for the trailer, I constantly forget to turn off the fan after a shower and come home after 8-10 hours of work and find that it has been running all day negating the HVAC..

I am living in the trailer full time, and I leave the HVAC on a schedule for my 2 cats that stay inside all day, as it is getting colder, I have been coming home to a trailer that is below my heater threshold due to the fan running all day, and my propane is being over users as a result.

wasn't an issue until recently, as I upgraded the noisy dinky little OEM exhaust fan with a full size one that is super quiet.

 

[team bradfield]

there are several on amazon, not specifically for exhaust fans, but you put it inline

 

[mjeds]

I can't seem to find anything that is 12v specific maybe my search foo isn't so good today, i see these digital programmable ones, not what I want, I just want a simple turn the dial type.

 

[mjeds]

something like this:

Amazon.com

but $70 is a lot for a simple timer

 

[Kevin D Pem]

Here you go!

UltraPro 60-Minute In-Wall Spring Wound Countdown Timer Switch, Mechanical Timer Switch, Timer Switch for Lights, Bathroom Fan, Exhaust Fan, No Neutral Wire Required, Wall Timer Switches, White, 41081 https://www.amazon.com/dp/B07VF7FT1J?tag=rvf01-20

 

[mjeds]

Thanks Kevin. But that is for a 125v. My bath fan is 12v. Won’t work.

 

[BGMAC]

Thanks Kevin. But that is for a 125v. My bath fan is 12v. Won’t work.

The switch that Kevin mentioned should work just fine for 12 volt as well since it is a mechanical timer and not electrical. The rating for the contacts inside are AC ratings so I don’t think it will burn out.
You could get it, wire it up without installing it to test it out before cutting a hole in the wall.

 

[Kevin D Pem]

The switch that Kevin mentioned should work just fine for 12 volt as well since it is a mechanical timer and not electrical. The rating for the contacts inside are AC ratings so I don’t think it will burn out.
You could get it, wire it up without installing it to test it out before cutting a hole in the wall.

What he said! The contact spacing is the only difference between 12 vs. 120 volts. Contact size is based on amperage, and that unit is ample for the task.

I looked for spring wound so no motor issues with different voltages. Only thing I don't like is the 1hr time limit. But that seems to be standard.

I would mount a bypass switch for summer use.

 

[rv4travlin]

And it works well for wife/kids/grand kids that don't know how to turn of lights.....

 

[mjeds]

What he said! The contact spacing is the only difference between 12 vs. 120 volts. Contact size is based on amperage, and that unit is ample for the task.

I looked for spring wound so no motor issues with different voltages. Only thing I don't like is the 1hr time limit. But that seems to be standard.

I would mount a bypass switch for summer use.

interesting, I figured as much and bought one from Home Depot and the fan would not turn on with it,