My winter project.
The furnace has a 1/3 hp motor. The starting PF is roughly calculated at:
250 running watts / (115vac * 4 amps full load) = 0.543 pf
So the starting wattage the generator would see:
250 run watts / 0.543 pf = 460 watts starting (fan motor only).
Motor specs from Dayton 1/3 hp motor 115vac 4 amps max load.
The furnace is rated at 6.9 amps max from the name plate.
So P=IE = 120 * 6.9 = 828 watts max
So the generator, if rated at 1000 watts or better, should handle the furnace load.
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