To provide a floor heating system, a waterproof structure between the resistance heating element and the housing is provided, and to provide a heating facility to use the floor heating system and it is the resistance heating element with double insulation structure. A is spread the particles therein, a housing 11 forming a floor placed a plate of porous thereon, and heating means provided inside lower portion of housing 11, water jetting provided above the heating unit and means, floor water is supplied to the layers of particles by the water jetting means, to generate steam by heating means, to release water vapor a layer of particles by the heating means and the steam from the floor as well is heated A heating device 10, the heating means, and communicates with the inside of the housing 11, a tube 20 which is waterproof connection portion between the housing 11 and has an opening 15 for opening at least one end outside the tube I configured with a resistance heating element is housed freely withdrawn from the opening 15 in an electrically insulating state within the body 20.BACKGROUND.【課題】床暖房装置において、抵抗発熱体と筐体内との間に防水構造を設け、前記抵抗発熱体を二重絶縁構造とする床暖房装置及びそれを使用する加温施設を提供する。【解決手段】内部に粒子を敷き詰めて、その上部に多孔質の板を載せ床面を形成する筐体11と、筐体11の内部下方に設ける加熱手段と、加熱手段の上方に設ける水噴出手段とを備え、水噴出手段により粒子からなる層に水分を供給し、加熱手段にて水蒸気を発生させ、加熱手段及び水蒸気により粒子からなる層を昇温させると共に床面から水蒸気を放出させる床暖房装置10であって、加熱手段は、筐体11内部に連通させ、少なくとも一端を外部に開放させる開口部15を有すると共に筐体11との接続箇所を防水構造とする管体20と、管体20内に電気絶縁状態で開口部15から取り出し自在に収納される抵抗発熱体とを備えるように構成する。【選択図】図1
