The electric heater becomes the primary source of energy while the existing oil or gas fired furnace acts as an auxiliary source below a predetermined outdoor temperature or time of the day

Mode selection switch (Oil, Dual-Energy, Electricty)
Operating mode indicator lights
Can operate at a specific time of the day
Deflectors supplied to optimize air flow passage
Qualifies you for special rebates from your local power utility
More environmentally-friendly
5-year warranty