The contact thermal sensation caused by foot or buttocks contacted with floor is one of the evaluation index for the floor heating. This paper deals with the evaluation method of the thermal sensation for the floor heating. The thermal sensation of testing floors with ten types of floorcovering and four floor temperatures was evaluated by bare foot, slippered foot and buttocks. The contacting surface temperature between an artificial foot and floor was measured. The test results are as follows ; (1) The relation between floor temperature and thermal sensation is approximately on a straight line each floorcovering, and these lines crossed at foor temperature of 32℃ to 34℃. (2) The contacting surface temperature of artificial foot shows the same tendency as that of human foot. (3) The relation between floor temperature and contacting surface temperature is approximately on a straight line each floorcovering, and these lines crossed at floor temperature of 32℃ to 34℃. (4) The contacting surface temperature can estimate the thermal sensation of floor heating. (5) The comfortable range of sensation is 1.6℃ to 3.2℃ of contacting surface temperature.
