To make clear the condition of thermal environments of the monitor-roof dairy barn in mild climate, air temperature and humidity, temperatures on the roof and under the stall were meastred.
The results obtained from this study were as follows:
(1) When the maximum outside tempeature of one summer day was 27.2°C, the maximum inside temperature was 27.7°C. It is considered to be due to ventilation effect of the open space of monitor roof and thermal effect of the roof insulation.
(2) The inside relative humidity during the night in summer was nearly 100%. This seems to be influenced by outside ani humidity.
(3) The mean surface temperature on the stall in a day was approximately 26.3°C in summer and 18.4°C in winter. And there were no differences in the mean temperatures between the insulation stalls and the normal stalls.
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