If you are looking to update your heating system then you should contact Elektro Store, We contacted them from an online search, we spoke to Paul Berridge he was absolutely brilliant, he advised how the system worked etc in a way even we could understand. We purchased the aquafficient 6 and Paul kept us up to date with the delivery/installation times and called to make sure we were happy with everything. The Customer Service is second to none, Paul is so friendly he goes that extra mile for his customers. Thanks Paul for all your help