The installer will certainly utilize your existing electrical panel to supply power to your new a/c and will install the new service disconnect box securely on the side of your home. http://gtccorpserv.com/__media__/js/netsoltrademark.php?d=bbs.pku.edu.cn%2Fv2%2Fjump-to.php%3Furl%3Dhttps%3A%2F%2Fhampsteadairconinstallation.co.uk