The heat source question of household heating;

Study on heat metering and collecting fee of household heating;

Application of the gas-fired boiler for household heating;

The advantages and problems of individual heating using wall-mounted gas water heater as heat source are described,and the economy of individual heating is analyzed.

Applying maximum permissible unbalance rate of upfeed and direct return system for individual heating, the selection range of average specific friction resistance for entrance riser, pressure pre-reservation value for entrance inlet and building inlet are determined.

This paper suggests to apply the time-share heating strategy for different buildings,in order to achieve heating as expectation and energy saving.

The research results show that stratified heating can make a full use in the heating area and inhibit thermal convection between the upper and lower in large space,but it can\'t produce a huge benefit of energy conservation.