We're trying to reduce our home energy bills and it has been suggested that we replace our 12 year old Firebird 90/120 oil boiler with a new condensing type boiler plus solar panels for hot water. We have a 2 storey detached house, 310 sq. metres (3335 sq. ft) in the south-west. Any suggestions as to what combi oil/solar products work well together, are the most energy and cost effective. Is there a smart controller available on the domestic market that maximises efficiency? Any suggestions