Abstract
The results of laboratory measurements on the performance of the HVAC system powered by wind generator, solar cell, and solar air heater, are described. Experiments were performed in various weather conditions both in winter and summer. The experimental results show that 30-90% of thermal energy to regenerate the desiccant in this system and 20-65% of the energy to power the system were supplied by natural energy in summer, and 30-97% of the energy to power the system was supplied by natural energy in winter.