To maintain optimal performance in a floor heating system, the elements of system must be consisted of the adequate structure in order that the heat flow is efficiently transmitted from the floor structure to indoor space. The aims of this study is to propose the optimal structure type and present applicable design data of a floor heating system. The design data suggested in this study can be applied to cooperate energy efficiency design as well as comfortable indoor thermal environment in the early design stage.

1. Introduction
 2. Establishment of Computer Simulation Condition
 3. Analysis on the Results of Computer Simulation
  3.1 Heat Output and Floor Surface Temperatureacconling to Thickness of Covering Screed
  3.2 Heat Floor Density and Floor Smface Temperatureaccording to Thermal Storage Layer
  3.3 Heat Flow Density and Floor Smface Temperatureacconling to the Thickness of Insulating Layer
 4. Verification of the Results of ComputerSimulation and Experimental Measurement
 5. Proposal of Design Data in Floor Heating System
  5.1 Establishment of Variables for Design Data
  5.2 Result of Simulation and Design Charts
 6. Conclusion
 Reference

• Dong Woo Cho(Building & Urban Environment Research Division, Korea Institute of Construction Technology, 411-712,Korea) Corresponding Author
• Jae Sik Kang(Building & Urban Environment Research Division, Korea Institute of Construction Technology, 411-712, Korea)