For all your heating and cooling needs, call or contact us today! The hot water treatment was a real new idea for me.i never encounter any serious blocking but your idea of hot water combinations and the pepsi idea were really innovative . Need a quote? get in touch with us and we'd be happy to help. I was very pleased to engage a gas force they are very friendly and professional in their work they have got the latest designs to central heating systems and boilers that are well.