Is your boiler playing up? or is it just time to get a new a rated energy efficitent boiler? then why not give us a call? As part of our service and to reassure all our customers the we are members of. Thank you for using wpj heating, we wish you a great day! Combi boilers are becoming an increasingly popular choice amongst our customers across the uk due to their space-saving functionality. I never new pepsi and coke were.