Abstract
The use of convective air-conditioning is standard practice in Japan, where the climate is hot and humid during the summer season. There is growing interest in cooling systems, which deal with sensible and latent loads independently, due to its potential for improvement in energy efficiency. This paper describes the use of cooling and heating utilizing radiators installed in rooms. The temperature of the radiator is allowed to run below the dew point, resulting in condensation occurring on the radiator surfaces. Basic characteristics of the system is described, including its energy performance and comfort.