I suspect that database could grow awfully large. y makers x z models x 10 sizes per model. Maybe just a list of approximate values for given tonnage. That might be enough for general design uses. Numbers for the typical 10 SEER unit would work for most everything. If your customer is spending big bucks on a super high efficency unit, it'll draw less and you just overdesigned by a little. A top of the line, 14 SEER, 2 ton will draw about 8 to 9 amps and a generic 10 SEER runs about 12. Hopefully you'll have the actual unit on site to read the nameplate before you actually have to stab a breaker for it.
