I was considering installing baseboard heaters in my finished attic. I think I have the basics down as to what I need: 2 pole breaker, 10/3 copper romex run into the space to a switch box for the thermostat, and then from there to the heater. The heater I am looking at is 1500 watt and runs at either 220v or 240v. Do my calculations sound about right? Also, is there a way I can determine if I have enough room on my panel? I will most likely have an electrician come in and make all the connections.