I need to make an adjustable power controller for a 3kW heater that will run off single-phase 240V AC power.
How should it be done?
Maybe a triac circuit similar to that used for dimming lights. Could this work? (Household heaters don't seem to ever be 'dimmable', is this just a cost saver, or is there another reason?)
An alternative idea was switch the heater on and off with a minimum interval of once per second in a PWM fashion, using a zero-cross solid state relay. But I don't think the neighbours would be happy with their lights flickering at 2Hz.
Any thoughts or other ideas would be appreciated