Originally Posted by Rivethead
Looks like your already over the maximum watts allowed on the 15A circuit - without adding to it.
115 volts x 15 amps = 1725 watts - derated to 80% (required) = 1380 watts allowed on the circuit.
Some are more conservative and only use 110 volts in the calculation.
What code section makes you derate a circuit to 80%? and its 120 volts not 115... so a 15 amp circuit can be maxed out to 1800 watts.
Re-read the definition of Continuous Load
To the OP: I say your good to go!