Profile: Holman Boiler Works, Inc. offers boiler sales, boiler repairs, boiler parts, rental boilers, re-manufactured boilers, and boiler tubes. We also provide boiler services. We represent manufacturers like Cleaver Brooks and Natcom. We provide boiler gaskets and tubes, boiler burner replacements, as well as boiler burner modifications Low Nox. Our products include firetube boilers, commercial & industrial water tube boilers, commercial high efficiency heating boilers, and all the trim, controls, burners, and auxiliaries. The firetube boiler design uses tubes to direct the hot gases from the combustion process through the boiler to a safe point of discharge. The tubes are submerged in the boiler water, and transfer the heat from the hot gases into the water. Inside a firetube boiler, the hot gases travel down the furnace during the combustion process, (first pass). The rear head seals the gases in the lower portion of the head. The gas is re-directed through the second pass tubes. In the front head, the hot gases are sealed from escaping out of the stack, and turned and re-directed through the third pass tubes. The hot gas travels toward the upper portion of the rear head, where it is turned and directed through the fourth pass tubes. From there, after giving up most of the energy from the combustion process, the gas is directed into the stack, and vented to the atmosphere.