How does the fire tube boiler operate?

Answer:
In a fire tube boiler, the water surrounds a set of tubes through which the fire and the products of combustion travel (as opposed to a water tube boiler, in which the water travels through the tubes, and the fire surrounds the tubes).

The HVAC Veteran
First answer by VinnieMan. Last edit by VinnieMan. Contributor trust: 2 [recommend contributor recommended]. Question popularity: 2 [recommend question].