The boiler capacity should based on the Heating Load Curve or Heat Balance Diagram, and includes the heat loss in pipelines, self-used heat of boiler room, available used waste heat. While, usually, it is difficult to get the Heating Load Curve, the heating load could get based on the max thermal consumption per hour within production/heating/domestic, and then determine by using the coefficient.

The demand of medium and the heating system should be determined according to the heating mode. Most textile mills use steam boilers. In recent year, according to different textile equipment, more and more heat conduction oil furnace also put into textile production.

The heating parameters of boiler room should be in accordance with the requirements of users' heat parameters. But in the choice of boiler, should not make the boiler rated outlet pressure and temperature and user use pressure and temperature difference too large, so as not to cause high investment, low thermal efficiency.

Boiler should be more efficient. The boiler output, the number of sets and other performance can adapt to the demand of heat load change, in order to facilitate economic management. If the use of one boiler operating at full load can meet the demand for steam, it is not appropriate to use two boilers operating under lower load. However, from the perspective of safety production, it is necessary to consider whether a single boiler in operation can be started quickly in a short time due to failure, so as to meet heating requirements without affecting production.

It is better to select the boilers with same capacity or combustion equipment. If different, the max limitation is two models, to decrease the problems of equipment layout and management.