Thought I'd seen that.
On the 100 amps service. I've only got what most would call 50 amp service - double 50A breaker providing 220 service. On that feed, I have a Vastex 30A (220) Dryer, a 20A (110) Flash, 15A (110) A/C, 5 sets of double florescent tube lights and occasional use of the exposure unit. I know it's a bit tight, but so far no problems. So if you have a 100A (double breaker for 220 service), I doubt you have a lot to worry about. Talk to an electrician and discuss things. You might be surprised.