Condensing Boilers

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

Boilers are fairly simple; they apply heat to water, which boils and circulates through the system in the form of very hot water or steam. Thermal energy moves from high to low temperatures, so heat is transferred from the water or steam to the air. Read More…

Condensing Boilers Condensing boilers are tanks or vessels that transfer thermal energy from a heat source to water or steam while recovering energy that would normally be expelled through the flue. By condensing the escaping water vapor back into liquid water, the boiler uses latent heat to boost its efficiency up to 98%.

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.

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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, and custom engineered systems.

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Fulton $$$

Chattanooga, TN  |  855-753-2645

Since 1987, Industrial Boiler & Mechanical has been selling and offering superior service for new & rebuilt boilers: a wide variety of stock boilers including firetube boilers, watertube boilers, vertical boilers (tubeless), solid fuel boilers (wood, coal & bio-mass), electric boilers & boiler burners.

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Industrial Boiler & Mechanical Co. Inc. $$$

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. $$$

Greensboro, GA  |  706-453-2050

With over 50 years of knowledge in quality control, process piping, fabrication, pressure vessel installation, and ASME certified welding, we specialize in meeting the stringent quality and diverse fabrication needs of all our customers. B&S is qualified for a wide range of projects; from Chillers and Cooling Towers, to large Compressed Air Systems, to full Boiler Rooms; we have the expertise.

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BSP Boiler & Steam Performance $$$

Buena Park, CA  |  714-562-0196

As a top California boiler company, Manley’s Boiler provides boiler repair, maintenance, monitoring, boiler rental, and installation services. We work on any boiler brand, model, and size of commercial and industrial boiler for customers all across California. Manley’s Boiler is accredited with both “R” and “S” stamps, setting the standard for boiler maintenance and repairs nationwide.

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Manley's Boiler, LLC $$$
placeholder image Unilux Advanced Manufacturing, LLC Fulton Industrial Boiler & Mechanical Co. Inc. Nationwide Boiler Inc. BSP Boiler & Steam Performance Manley's Boiler, LLC

Condensing boilers are box-like with the heat source and other components housed safely in a cast iron, copper, steel or stainless steel casing. Most boilers need to be in a fireproof and well-ventilated area with intakes for water and fuel. They provide hot air and water, two important parts of daily life.

Condensing boilers are found in industrial environments, offices, schools, residential units and many other buildings; they can also be used to heat pools, for example. Mobile boiler units are used in emergency and military situations for temporary heating. Condensing boilers also find uses beyond general heating. They provide hot water that is used in manufacturing and industrial processes.

Condensing boilers work the same way that conventional boilers do with one main difference. Fuels such as wood, coal or natural gas are burned, producing hot gasses that pass through a series of metal rods or tubes that are immersed in water. The heat from the gas is transferred to the metal rods and then to the water. The temperature of the water increases and the hot water can be used in a variety of ways. In a conventional boiler such as a combi boiler the water vapor would escape through the flue. Condensing boilers prevent this, trapping the steam and condensing it back into liquid water.

These boilers rely on their design for maximum success, usually by having large or dual heat exchangers (the metal rods and tubes). Condensing boilers offer efficiency levels of about 30% greater than conventional boilers as well as significantly fewer CO2 emissions. The temperature of gases leaving the flue in a conventional boiler are 120°F or more while condensing boilers release gases at temperatures of 50-60°F. There are three kinds of condensing boilers. Regular boilers have a hot water cylinder to store water while combination boilers do not; they use multiple heat sources to quickly heat water according to the demand. System boilers are also called sealed system boilers because they use hot water cylinders with most of the major components built in.

Condensing Boilers Informational Video