Hot Water Boilers

A reliable source for Industrial Boiler information and leading Industrial Boiler Companies & Manufacturers.

Hot water boilers are an important part in hydronics, the use of water as a heat-transfer medium in heating and cooling systems, because they heat the water that circulates through a series of pipes and into radiators, baseboards and other heat exchangers. Read More…

Hot Water Boilers Hot water boilers are tanks or vessels that transfer thermal energy from a heat source to water that is then circulated to provide residential, commercial and industrial heating.

Leading Manufacturers

Schenectady, NY  |  518-344-7490

We strive for the best at Unilux Advanced Manufacturing LLC. Our boilers are designed with superior materials. We are proud to say that we produced the world's first UL/FE boiler and our units provide the highest levels of safety and accountability. Our systems feature large volumes of totally isolated positive circulation. Rest assured with our company and our 30 years of manufacturing experience! Contact us today!

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Unilux Advanced Manufacturing, LLC $$$

Pulaski, NY  |  315-298-5121

As the inventor of the vertical tubeless boiler, Fulton has a reputation for success dating back to 1949. We`re a global manufacturer of steam, hot water and hydronic boilers; thermal fluid heaters; custom engineered systems; and a full range of ancillary equipment. We continue to make advancements in the boiler market and are committed to improving life through heat transfer solutions.

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Fulton $$$

Fremont, CA  |  800-227-1966

Nationwide Boiler is a leading supplier of new and reconditioned boilers for industrial facilities worldwide. We’re a manufacturer’s representative and stocking distributor for B&W package watertube boilers and Superior package firetube boilers, and we have fully reconditioned boilers in a variety of types and sizes. With sales, service and equipment depots throughout the U.S., we strive to provide our customers with reliable equipment and superior service. Call today to learn more!

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Nationwide Boiler Inc. $$$

Thomasville, GA  |  800-250-5883

Cleaver-Brooks, a world-renowned provider of boiler room products and systems, is committed to providing efficient solutions that reduce energy usage, cost & environmental impact. As the pioneer of packaged firetube & watertube boilers, we're the only manufacturer to offer an entirely integrated boiler room solution for any size application, while offering superior aftermarket service & solutions.

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Cleaver-Brooks $$$

Clear Brook, VA  |  800-872-7562

We are dedicated to providing a better customer service experience for all of our clients! We are a manufacturer of packaged modular fire tube boilers. Applications include space heating, domestic portable hot water and combination space heat with domestic hot water. Sioux Corporation also manufactures low-pressure steam boilers. For more information on us, give us a call today!

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Reimers Electra Steam, Inc. $$$
placeholder image Unilux Advanced Manufacturing, LLC Fulton Nationwide Boiler Inc. Cleaver-Brooks Reimers Electra Steam, Inc.

Hot water boilers are usually made from stainless steel, aluminum, cast iron or steel and are built to withstand high temperatures and pressure. A furnace along with heat exchangers and tubes is enclosed in a housing that provides a fireproof, well-ventilated, stable-air environment. Possible fuels include coal, wood or natural gas, though hot water boilers that run on electricity are also widely available. These appliances may be also be combi boilers, which do not have a hot water storage tank but instead draw in water as it is needed.

Unilux Hot Water Boiler Systems Hot Water Boiler Systems - Unilux Advanced Manufacturing, LLC

Depending on the application, commercial systems may add various substances to the water including chemicals to inhibit corrosion, prevent freezing, increase the boiling point of the water, improve leak detection and reduce bacteria and mold growth. They are used for commercial and industrial heating and circulation, tank heating, swimming pools, floor and baseboard residential heating and water source heat pumps.

There are two main ways boilers heat water: fire-tube or water-tube. Fire-tube boilers direct the heat produced from burning fuel through heat exchanging tubes that are immersed in water. Heat moves from high to low temperatures so the water around the tubes becomes hot. Water-tube boilers are different in that there is water inside the tubes that circulates as the tubes are heated from the outside. The hot water is then moved by one of three ways. Gravity flow heating systems are the oldest, simplest and least efficient technique. Water is circulated due to the thermal differences between hot and cold water; water expands as it is heated so it travels through the pipes and displaces the cooler water.

A pumped water system uses the same principles as gravity flow but is aided by use of a pump that circulates the water faster to produce a more controllable room temperature. Baseboard heating also relies on radiant heat, the heat that is released from hot pipes in the system. The main difference is that radiators are replaced with enclosed metal fins installed in the baseboards to distribute warm air at floor level. As the hot air rises it displaces cooler air and warms the room.

Hot Water Boilers Informational Video