In this paper, theoretic review of a heat pump use and operation is given. Further, the possibilities of a heat pump use in heating and air-conditioning is analysed, especially considering the tourist and catering facilities. The economic and environment protecting effects of a heat pump use as an energy source (conditionally speaking) in the air-conditioning process is pointed out. It is shown that these effect make a heat pump use justifiably attractive.

Residents completed a questionnaire survey assessing indoor environment and residents' behavior (i.e. when they opened windows/doors, when they operated air conditioners, and so on) during the period of ventilation measurement. The purpose of this study is to measure the ventilation rate in occupied dwellings in Kagoshima City, located in the southern part of Japan, using the tracer gas method and to investigate the relationship between the occupants' behavior in each dwelling and the energy consumption for air conditioning during the summer period.

The paper is a srudy of the effect of air infiltration on temperarure and water vapour pressure distributions within a porous layer. A theoretical formula describing these is proposed. The paper concludes with some new recommendations to the designer.

Both building performance and occupants' thermal comfort are influenced by heat conduction, convection and radiation as well as condensation/evaporation. This paper presents an analysis of thermal comfort in buildings subjected to simultaneous heat and moisture transfer using numerical techniques. A model based on computational fluid dynamics has been developed for predicting the indoor thermal environment. Assessment is made of the effects of radiation heat transfer and moisture condensation on the accuracy of predicted indoor thermal comfort.