According to this characteristic, three divisional heat supply modes such as unequal inlet gas temperature with equal inlet gas flow rate, unequal inlet gas flow rate with equal inlet gas temperature, and unequal inlet gas.

Considers that in the future residential air conditioning in large cities should be directed toward district heating/cooling and cogeneration of heating/cooling and power while in middle and small cities or suburb areas,the so called household air conditioning should be promoted and for apartments for singles or shared occupancy,the room air conditioners are desirable, and that these ways a.