Boilers are industrial, commercial and domestic utilities that provide heated air and hot water in homes and businesses as well as steam for use in steam-operated machinery. The most common boiler varieties are often denominated according to their method of heat generation; gas boilers, electric boilers and oil boilers are the most widely used steam boilers.
Almost all boilers can be placed into one of those three categories (there are exceptions: Central Boiler’s systems are wood fired). Combi boilers are different from conventional models because they do not store hot water but rather heat it rapidly on demand. They have a second heating element to speed the heating process and maintain a steady supply for as long as the boiler runs. Condensing boilers are able to recover energy that would normally be expelled through the flue by condensing the escaping water vapor back into liquid water. Because the boiler uses latent heat to boost its efficiency to above 90%, it is considered a high efficiency boiler. Another way to increase efficiency is through a high pressure boiler, which maintains an operating pressure greater than 15 PSI; some models achieve pressures as high as 1,000 PSI. Low pressure boilers have pressure less than 15 PSI and are used mostly in smaller buildings for heating a space. Industrial boilers are used either as part of a heating system or to individually generate hot water or steam for various industrial and manufacturing processes. They are much larger in size and built from heavy duty materials to ensure safety, durability and performance.
Some Leading Manufacturers
Schenectady, NY | 518-344-7490
Unilux Advanced Manufacturing, LLC has over 30 years of manufacturing and operational experience in the boiler industry. We are one of the most pristine and highly engineered in our industry and take pride in every unit we manufacture. We offer high pressure steam boilers, low pressure steam boilers, hot water boilers, and more! Our boilers are known for being the safest and most efficient in their class. For more information about our boilers, call us today or visit our website!
Pulaski, NY | 315-298-5121
We have maintained a reputation for quality and excellence since 1949. We have products for almost any industry or commercial heating application. Our company offers a variety of products including steam boilers, hydronic boilers, thermal fluid heaters, custom engineered systems, and more. Our sales representatives will help you find the perfect solution for your unique application. Call us today or visit our website for more information!
Los Angeles, CA | 323-727-9800
Since we first opened our doors 69 years ago, we have been supporting thousands of companies with their boiler system needs. We offer a wide range of steam boilers, hot water boilers, thermal liquid heaters, low NOx burners, and much more. We continue to grow, expand, and invest in the latest technology to provide our customers with the very best products! For more information about our boiler systems, call us today or visit our website!
Wheeling, IL | 800-446-3325
We are a manufacturer of hot water and steam boilers with nearly half a century of experience! We take pride in providing high quality products, and we offer many different purchasing options. You can buy, rent, or lease boilers to meet the needs of your applications. We assist you every step of the way with design, delivery, installation, training, maintenance, and more. Ask about specialty and biofuel boilers too! For more information on all our products and services call us toady or visit our website.
Huntington Beach, CA | 800-775-2645
We are one of the largest steam boiler manufacturers in the industry! We have over 30 years of experience and have consistently led the industry in the development of technology that reduces oil and gas consumption. Our eco-friendly boils are engineered for greater efficiency, lower costs, and reduced environmental impacts. We design industrial boilers, gas and condensing boilers, steam boilers, and fire tube boilers. Get in touch with us to learn more about our steam boilers!
Boilers provide residential, commercial and industrial heating and are a key part in hydronics, which is the use of water as a heat-transfer medium. Boilers are constructed of stainless steel, aluminum or cast iron and are composed of a furnace with various heat exchanger components and a pump or fan. The two basic designs include fire-tube and water-tube boilers. Fire-tube boilers work by distributing heat through tubes immersed in water; water-tubes circulate water through heated tubes within the enclosure. Hot flue gases are passed over the tubes, heating the water, and then are discharged through a stack. Both designs are comparable in efficiency but are not interchangeable, because of structural considerations. Boilers rely on radiant heat and the transfer of thermal energy to guide the movement of the water or steam. Because heat moves from areas of high temperature to low temperature, the furnace is able to heat the tubes that heat the water, which in turn heats the pipes or radiators that heat the room; virtually the entire process relies on the behavior of high temperature fluids.
The purpose of a boiler is to provide hot water or to generate steam. Steam boilers produce steam for heating large buildings such as factories and warehouses; in other industrial applications the steam can be used for power. Hot water boilers are an important part in hydronics because they heat the water that circulates through a series of pipes and into radiators, baseboards and other heat exchangers. Boilers generally use one of three sources of fuel: gas, oil or electricity. Gas boilers are fueled by natural gas and use a natural gas flame to heat water to a specified temperature or to its boiling point, thereby producing steam. They are the most common type of boiler used for heating applications in the United States. Oil boilers use oil either as fuel for the furnace or to replace the water generally found in boilers and produce hot gases that travel through the piping system. Electric boilers offer efficient, clean and safe water heating. Unlike appliances that provide heating through the process of combustion, electric boilers eliminate the problems with carbon monoxide, back drafting, pilot lights, gas piping and venting.
Boilers have historically been used to produce steam for power. The steam locomotive and steam engine are two examples of this application. They were used industrially and were fairly dangerous, as early operators did not fully understand the relationship between temperature and pressure. Concerned citizens and workers contemplated getting rid of steam boilers altogether until advances in safety and knowledge were made. Today, boilers operate in many different settings such as schools and office buildings. The materials, design and construction have all improved to the point that fear is no longer a factor. Accidents do still occur but with less frequency and with fewer injuries or fatalities. Boilers are now an extremely valuable part of life and can be found in almost any environment. Once quite large, boilers are becoming smaller and smaller in order to fit into tight spaces, though some boilers, like those used industrially, must remain their size in order to produce the necessary amounts of steam and water. Mobile boilers are now available and can be used in military, emergency or temporary situations to provide steam for heat or power. Even as technology continues to make significant advances, boilers will most likely remain a critical part of life for years to come.