The rooms with void space are very effective at enlivening household interiors, but they make the realization of comfortable thermal environments extremely difficult. We advanced the development of an air supply preheating system. Operation of this system conducts base heating to a room temperature of 15°C. One anticipated effect of this system is that by reducing the load during the heating startup period, a comfortable thermal environment will be able to be realized by operating just floor heating, air-conditioning or another heat source.
