Just considering our options re the heating/hot water system in the bungalow we moved to in October. The boiler, hot water cylinder are relatively new, but the rads and pipework are probably original from when the place was built. The bungalow is built on a concrete raft/slab and the pipework is embedded in the floor. Not sure to what extent whether the pipes are in sand with soft fill as there is laminate floor everywhere. Do we install a new System boiler (pressurised) and route new pipes down the walls from the loft, dig out the old pipe from the floor and replace to be on the safe side or what? We are also considering a Air Source heat Pump and just wondered if anybody had one?