Fire engines, must meet certain criteria in order to be "selected" as a pump's driver. As a pump driver, the engine must deliver enough power so the pump can perform as it is rated as per the curve. The engine must also conform to environmental conditions. certain conditions may require specific aspect of the engines to be different.

One of the most obvious is the cooling method. There are three ways of cooling; air cooled, radiator cooled, and heat exchanger cooled. Since fire pumps are mostly located in a narrow space, i.e. specific buildings, basements, pump room, they lack ventilation. Heat exchanger cooled engines are considered to be the most effective option in this setting. Considering a larger space, a radiator engine may be used, but they are heavier due to the radiator size. Air cooled engines are rarely taken into consideration due to the stationary position, allowing little cooling flow to be present.

Another obvious factor is the engines' standards in which they conform to. Fire engines typically are produced to conform to at least national standardization. To achieve NFPA standardization, an engine must be packaged with accessories. Another aspect in NFPA-20 is that engines must have enough power to run a pump at 150% volumetric discharge. Therefore, an engine's rated power shall not conform to 100% of the pump's volumetric discharge, but 150% of its volumetric discharge. Higher order of engines can be packaged to order to Underwriters' Laboratories (UL) and Factory Mutual (FM). These engines may be more expensive, but are packaged to ensure the stability and running of such engines.

Factors that can be taken considered of include the engine's price, dimension, and others that may affect the installation process but has less impact than the power or the cooling method. 

Kirloskar Fire Engines offer the best performance at an interesting price with a wide range and variety of products to amend your needs of a fire engine.