I'm currently debating whether to spend good money upgrading my electrical to try and get a large older kiln working, or purchase a smaller new one that uses fewer amps. Lately I've noticed quite a few decent size 240v kilns that use relatively few amps and still boast cone 8 to 10. Olympic fires 3.29 cubic ft. of pots on only 26 amps, and Paragon's Biggest Little Kiln fires 2.9 cu. ft. on 28 amps.
I'd love to hear from anyone with experience using these types of low amp kilns. Are there drawbacks? Is it simply that they fire more slowly? Do they really achieve cone 8 - 10?