I'm designing a LP filter that should be used for a load of up to 2000W. I want to filter the AC voltage that supplies a controlled heater which uses a TRIAC for control. I've tried one approach but found it useless. First, such an inductor, on series with 13A must be very big and possible costly. Second, high losses of power. Third, since I'm working with DC I should use a non-eletrolytic capacitor so, for 220V and such capacitance, it will be very big. Clearly, although I got good filtering on o'scope, it's not the best approach for high power loads.
So, finally, is there a better way to design a LP filter for high power that is more electrical efficient and cheaper?
Also, my cutoff frequency was about 60Hz (planned higher, but had to adjust the inductor to guarantee the right current on load). Is there any rule of thumb of which fc should I use when planning to filter AC voltages?