Minimum of 16-hour carry-over for maintaining preset schedules during power failures
From the manufacturer
Intermatic FD12HC Spring Wound Countdown Timer
062 Unit Carton Width (in) 4
Emitters are made of three individual sections including a cylindrical plastic housing with a labyrinth water passage
Intermatic - FD34H - Spring Wound Countdown Timer, Decorator Style, Ivory f611 Minimum of 16-hour carry-over forSpec Sheet Install Sheet Intermatic FD34H Spring Wound Countdown Timer, Decorator Style, 125 277 VAC, 50 60 Hz, SPDT, 4 Hour Max, Without Hold, Ivory The FD Series Decorator Countdown Timers are designed to replace any standard or decorator style wall switch, single or multi gang. These mechanical timers do not require electricity to operate. They automatically limit the ON times for fans, lighting, motors, heaters and other energy consuming loads.