This paper describes results of a field measurement on air and thermal environment in a residential building where both radiant cooling and ventilation are realized. Combination between radiant cooling and ventilation can keep indoor CO2 concentration less than 1000 ppm and room air temperature s and MRTs 28°C or less. Radiant cooling uses less power than air conditioners with similar COP to the heat pump of panel cooling and is not remarkably affected by incoming outside air. Even if ventilation is done, external shading can realize the same SET＊ with higher panel temperatures than the case of non-shading.
