|>>|| No. 28028
A kW PFC stage isn't terribly expensive, as it's the front end of a moderate PC power supply. I could then PWM the output of that (which is basically 450V DC) into a series pair of regular elements.
Probably have horrible flicker & harmonics, but fuck it. Hm, I could just use the whole PC PSU, and switch in and out power resistors mounted to a massive blown heatsink, fed from 12V. That would be relatively sanely priced, not too offensive to the mains supply, quiet and reliable.
You're all right (except jumper lad), I should ditch blown air and get a panel or a convector. If I can rest my feet on it, so much the better.