Use this calculator to estimate how much you can save on energy costs by using timers on your tractor engine block heaters.
The typical engine block heater takes just 1 to 2 hours to raise a tractor engine to temperature for starting. A simple 24-hour clock timer can automatically turn the heater on at the desired time. The energy savings from running the engine block heater unnecessarily will usually pay for the clock timer in 1 to 3 months.