Latest technology for AirCon is to use dc motors & inverters to give infinitely variable compressors and evaporators and 'soft start'. Coupled with microprocessor control and ozone-friendly refrigerant, [R410A] these units easily achieve COPs of well over 4, so that the difference between 3 and single phase operation is nil.
www.toshiba-aircon.co.uk [Link gives a good idea on wassappenin',
technology wise, I'm not saying they're better than others.]
Having seen neighbors juggling their demand between phases and continually tripping breakers when they plug their kettle into the 'wrong' recep., I'd say 3 phase and residential is a bad idea.
Alan
[This message has been edited by Alan Belson (edited 01-21-2006).]
