I'm Eau claire, WI.... 1600sq feet upper level, 1100sq feet finished
basement. The basement's not used often so I keep the vents closed
down there...

My november bills were only $140-160 or even less... this last bill for
a 39 day period was only $220.

Your bill sounds high to me unless you keep your lights on all day,
have large power hungry appliances, or don't use a programmable
thermostat.

I keep our programmable t-stat at 66 during the day, 68 in the evening,
and 61 from 11pm-6am. I have electric water heater as well..

good luck,

Tony B.