The Intermatic FD12HC is a 12-hour spring wound countdown timer featuring a Single-Pole Double-Throw (SPDT) switching configuration. Designed for dependable, mechanical time control without the need for batteries or external power to drive the timing mechanism, this timer is a trusted solution for HVAC ventilation fans, exhaust fans, bathroom fans, and a wide range of commercial and residential timing applications.
Key Features
- 12-hour spring wound countdown mechanism — no batteries required
- SPDT (Single-Pole Double-Throw) switching for flexible circuit control
- Mechanical operation provides reliable, maintenance-free performance
- Ideal for controlling exhaust fans, ventilation equipment, and HVAC accessories
- Simple turn-to-set operation — no programming required
- Intermatic quality construction for long service life
Typical Applications
- Bathroom and kitchen exhaust fans
- HVAC ventilation fan control
- Commercial and residential timed switching
- Any application requiring a countdown timer with SPDT switching
Why Choose the Intermatic FD12HC?
Intermatic has been a leader in time control products for decades. The FD12HC spring wound timer eliminates the complexity of programmable digital timers while delivering precise, repeatable countdown control. The SPDT configuration allows the timer to be wired into a variety of switching circuits, giving installers maximum flexibility. With no batteries to replace and no programming to configure, the FD12HC is the go-to choice for straightforward timed control in HVAC and building systems.
