Underfloor heating system installed to ground floor areas running back to a manifold system with the heat source provided by a natural gas boiler. Commonly more of these underfloor circuits are being linked to air source heating. This is an effective way to heat an area subject to careful consideration of floor coverings. This means of heating needs careful explanation at the handover stage to the homeowner as the heating response is steadier and more progressive then the boost facility provided by the typical wet central heating provided by radiators.