When determining the boiler type to be purchased, one must check out the value of every sort of power plant . supported available funding and environmental Valves Use in Boiler performance the simplest alternatives are often determined. it's often difficult to continue without actually getting preliminary quotes for delivery times and conditions supported the chosen boiler location. Finally the specified load characteristics are still the most determining factor. Each combination of fuel and boiler type will affect the upkeep cost. Each fuel has unique corrosion and erosion properties.Many boilers do operate at low load factors and consequent poor annual efficiencies. this will be avoided by providing boiler plant with little or no margin over the particular required capacity and by installing multi-boilers or two or three smaller boilers. Boilers of this modular type are available for low-pressure predicament (LPHW) purposes, but obviously cost quite one boiler. this may also increase the upkeep , number of examinations and therefore the labor costs. Such a rise should be quite offset by the reduction in fuel costs thanks to the much higher annual boiler plant efficiency, which should be of the order of 20–30 per cent.