have 18000 btu air and with 16000 btu heat air conditudioner still in the box was to big for my window. has to have 31 inch oping or more to 42 inchs.. never got arond to putting in great for home or shop is 240 volt thanks for looking!!!!!!!!!!!! is still in the box nevers used..called Koldfront model Wac18001W power cord is 4ft of a grounded 3-prong outlit