What would be the power requirement for a baseboard heater in a basement room of area about 250 sq ft. One side of the room (length = 16') has a standard walk out sliding glass door. I would prefer to stick with 120v device.

Here in Minnesota, outside temperature can go below zero F, during peak winter!

Thanks

One rule of thumb is 11 watts per square foot, which I think would apply to your situation ,round numbers between 2500 to 3000 watts. At 120 volts a 2500 watt heater will draw 20.8 amps, and a 3000 watt will draw 25 amps. Both will need a 30 amp circuit, with #10 wire and a single pole 330 amp breaker. You should be able to find a recess heater that will have a builtin thermostat and a blower fan.

I agree. I normally go 10w per sq, but it pretty much works out to be the same.
Each environment has it's unique requirements;)

Thanks guys!
I was hoping to get away with 12AWG. Good that I did not open the box!

All right, this is what I finally did.

Since most of the baseboard heaters work at 240v (in Home Depot & Menards), I wired two 240v receptacles with 12/2 AWG in the same circuit - one in family room and the other in bedroom.

Since it is a shared circuit between family room and bedroom all I have to make sure is that the total current does not exceed 20A, which is easier than leaving head-room in two different circuits.