Timed Bathroom Fan

[anconn]

I have this problem of turning the bathroom fan on and forgetting about it. At home I fixed the problem with timers on the bathroom fans. Does anyone know of a timed switch that can be obtained for 12 volt use?

[gijoecam]

MEXICOWANDERER wrote:
Here is an image of a LEVITON which also should do the job. Select your button.

Doesn't that one require 120VAC to work? Won't work on a 12VDC RV fan...

[MEXICOWANDERER]

Here is an image of a LEVITON which also should do the job. Select your button.

[MEXICOWANDERER]

I am fussy. I demand Intermatic® Some I put a thirteen hundred watt load on for ten minutes or so, daily and they have lasted years. I used an Intermatic for my revised 80 amp battery charger and the quality of the Intermatic is so much better than a standard charger wind-up timer it is a joke. I HATE electronic switched (SCR) timers. They don't time so well after they emit the inevitable puff of smoke.

Also Intermatic makes an electronic multi-button selectable timer 2, 5, 10, 15 minute plus on and off timer with a MECHANICAL relay. Good for 15 amps.

I use a utility knife to cut an outline hole in the wall. Fit the timer, then use the cover plate. I've seen OAK plates for coax that would be pretty but I cannot remember where.

[wa8yxm]

The standard bathroom light timer sold by every electrical source store (hardwares, Lowes, Home Depot, et-al) is a spring wound (Turn past 10 minutes) timer with a simple SPST switch.. It will work find on 12 volts. No problem since it consumes no power other than that which you provide by winding the spring past 10 minutes.

[Dutch_12078]

camperpaul wrote:

Dutch_12078 wrote:
I don't know just how long you want the fan to run, but this typw of mechanical switch should work:

GE 15-minute Auto Shut-Off Switch

First the disclaimer:
In the 1980s, I worked for Intermatic as the Chief Electronics Mfg Engineer and Chief Test Engineer.

That GE timer is almost identical to the clock-spring timers made by Intermatic. They are available in various versions with different run-times, from 5 to 60 minutes.

Because they do not require electrical power to operate they are perfect for your application.

They can be used for switching any voltage from 6 to 240 Volts AC or DC. The contacts are rated for 15 Amps incandescent, which means they will safely handle the 200 Amp inrush of a 300 Watt heat lamp.

Thanks, Paul! Saved me all that typing... :B

[tenbear]

I had the same problem. I bought a mechanical timer, I think at Home Depot, and installed it. It has worked for several years. Here is a photo.

[westend]

camperpaul wrote:

Dutch_12078 wrote:
I don't know just how long you want the fan to run, but this typw of mechanical switch should work:

GE 15-minute Auto Shut-Off Switch

First the disclaimer:
In the 1980s, I worked for Intermatic as the Chief Electronics Mfg Engineer and Chief Test Engineer.

That GE timer is almost identical to the clock-spring timers made by Intermatic. They are available in various versions with different run-times, from 5 to 60 minutes.

Because they do not require electrical power to operate they are perfect for your application.

They can be used for switching any voltage from 6 to 240 Volts AC or DC. The contacts are rated for 15 Amps incandescent, which means they will safely handle the 200 Amp inrush of a 300 Watt heat lamp.

Dang, that is one of the deeper to-the-point posts I've seen on this, or other, forums. Thanks for sharing!

[camperpaul]

Dutch_12078 wrote:
I don't know just how long you want the fan to run, but this typw of mechanical switch should work:

GE 15-minute Auto Shut-Off Switch

First the disclaimer:
In the 1980s, I worked for Intermatic as the Chief Electronics Mfg Engineer and Chief Test Engineer.

That GE timer is almost identical to the clock-spring timers made by Intermatic. They are available in various versions with different run-times, from 5 to 60 minutes.

Because they do not require electrical power to operate they are perfect for your application.

They can be used for switching any voltage from 6 to 240 Volts AC or DC. The contacts are rated for 15 Amps incandescent, which means they will safely handle the 200 Amp inrush of a 300 Watt heat lamp.

[anconn]

Isn't that type of switch meant for house current?

[Dutch_12078]

I don't know just how long you want the fan to run, but this typw of mechanical switch should work:

GE 15-minute Auto Shut-Off Switch