I installed this switch 18 months ago in our bathroom (a room isolated from any outside venting thanks to a peculiar design decision made by the previous owners). Previously the exhaust fan had been operated by a standard toggle wall switch, and all of us would forget either to turn it on or turn it off while running the shower.

The installation was simple, and the "decora"-style block modernizes the room in a snap. The switches are labelled "30-15-10-5-Off" and that's what they do -- push one of them and the fan stays on for that length of time, in minutes. Each switch has an LED indicator next to it, and the time remaining is indicated by the LEDs lighting in turn, from top to bottom (e.g., when 10 minutes remain, the 15 minute LED extinguishes and the 10 minute LED lights). When two minutes remain, the 5 minute LED begins to flash. The OFF LED is a positive indicator that the device is off, and doubles as a night locator (good for our bathroom without windows!). It is unfortunately set a little too far into the lamp housing, which means it can't be seen unless one is facing the switch nearly head on.

As with other Leviton products, the circuitry is commercial-grade and reliable. Unlike some mechanical timers, this switch does NOT have an option to "hold" in the ON position. This may make it unsuitable for applications such as outdoor safety lighting where it is sometimes desirable to keep the lights on (say, when you're expecting company).

For a bathroom exhaust fan, it is close to perfect, and I recommend it without reservation.
I installed this switch 18 months ago in our bathroom (a room isolated from any outside venting thanks to a peculiar design decision made by the previous owners). Previously the exhaust fan had been operated by a standard toggle wall switch, and all of us would forget either to turn it on or turn it off while running the shower. The installation was simple, and the "decora"-style block modernizes the room in a snap. The switches are labelled "30-15-10-5-Off" and that's what they do -- push one of them and the fan stays on for that length of time, in minutes. Each switch has an LED indicator next to it, and the time remaining is indicated by the LEDs lighting in turn, from top to bottom (e. g., when 10 minutes remain, the 15 minute LED extinguishes and the 10 minute LED lights). When two minutes remain, the 5 minute LED begins to flash. The OFF LED is a positive indicator that the device is off, and doubles as a night locator (good for our bathroom without windows! ). It is unfortunately set a little too far into the lamp housing, which means it can't be seen unless one is facing the switch nearly head on. As with other Leviton products, the circuitry is commercial-grade and reliable. Unlike some mechanical timers, this switch does NOT have an option to "hold" in the ON position. This may make it unsuitable for applications such as outdoor safety lighting where it is sometimes desirable to keep the lights on (say, when you're expecting company). For a bathroom exhaust fan, it is close to perfect, and I recommend it without reservation.