Description : How many 1500 watt heaters can you run on a 20 amp circuit?
Last Answer : As you did not specify the voltage of the circuit, I will I will assume your heaters are 110 volt portable heaters not 220 volt baseboard heaters.Each heater will draw 1500 watts / 110 volts = 13.64 ... more than half of the 20 ampere rating of the circuit, you can only run one of these heater.