ProWarm� Water Underfloor Heating Systems are the ideal choice for homeowners and tradesmen wishing to install a Premium Branded water underfloor heating kit. ProWarm� High Output – Water Underfloor Heating Single room kits are ideal for combining one area of water underfloor heating in a high heat loss area (eg. conservatory) with a standard radiator system. Each kit is designed to cover an area in square meters when the pipe is spaced at 200mm apart. This spacing provides an output of 125w per square meter.