In watertube design boilers the water runs though tubes surrounded by combustion gases. Watertube boilers are used on the very high and very low spectrum of the boiler market. These are identified by their respective horsepower ranges as: • Utility — 100000 MBH and up• Industrial — 30000 to 100000 […]

Prime Duty: Hydronic heating 30# to 160# WWP. hospitals, small commercial/industrial and process. Firing Modes: Forced draft firing only. Comments: Economical boiler where high hydrostatic pressure over 30# WWP are required. Entire combustion chamber and all flue gas passages backed with tangential water tubes. Boiler good for hydronic applications, however, […]

Prime Duty: Hydronic heating systems, apartments, office buildings, small commercial/industrial buildings. Comments: Economic where high hydrostatic pressure over 30# WWP are required. Boiler not affected by thermal shock, however is subject to flue gas condensation caused by low inlet and/or operating temperatures. Atmospheric firing. Pressure fired not true forced draft. […]

Prime Duty: Domestic hot water and hydronic heating for apartments, office buildings, small commercial/industrial. Comments: Economic where high hydrostatic pressure over 30# WWP are required. Boiler not affected by thermal shock, however is subject to flue gas condensation caused by low inlet and/or operating temperatures. Atmospheric firing. Pressure fired not […]

Prime Duty: Domestic hot water, pool heaters, hospitals, health clubs, motels, small industrial plants, laundries, restaurants and car washes. Comments: Quick recovery Low cost Low longevity Consult manufacturer’s data regarding minimum water circulation rates and pressure drops.

Firetube boilers are used in applications that require moderate pressures and moderate demand. Firetube boilers generally have 2-inch diameter or larger tubes. They are usually straight and relatively short so that the hot gases of combustion experience a relatively low pressure drop while passing through them. Firetube boilers are generally […]

There is one other type of firetube boiler we want to mention, it is the vertical firetube boiler. These packaged boilers come in two formats: • Vertical Tubeless • Vertical Tubed These boilers are encountered on the smallest end of the boiler spectrum. They are used to produce steam for […]

Firebox design boilers carry with them the tradition of a basic boiler design proven over the last hundred years. A second cousin to the brickset and locomotive steam engine designs of the past, these boilers feature a simple durable construction that provides low maintenance performance year after year. The firebox […]

Cast iron boilers are a type of firetube boiler as well. In most original boiler rooms, the building was built around or on top of the boiler room. When it came time to replace many of these boilers, there was no convenient way to bring in a new boiler. The […]