Scotch Boiler is available in sizes up to 800 hp.

Press Release Summary:

Series 4S Four-Pass Wetback Scotch Boiler, for high- and low-pressure steam or hot water, incorporates positive water flow circulation and maximum heat transfer from water-backed surfaces. Rear access door incorporates lightweight, vacuum-formed insulation and eliminates need for hinges and heavy davits. Boiler uses no proprietary parts or gaskets on boiler trim or burner, ensuring availability of replacement parts.

Original Press Release:

Burnham Commercial Introduces the 4S Four-Pass Wetback Scotch Boiler

Lancaster, PA-Burnham Commercial is pleased to announce the availability of the new 4S Four-Pass Wetback Scotch Boiler. The 4S design, available in sizes to 800 HP for high and low pressure steam or hot water, incorporates positive water flow circulation and maximum heat transfer from water backed surfaces to provide long life and efficient operation.

The Series 4S uses the very latest design techniques and standards including high furnace volumes resulting in low furnace volumetric release rates. It also has an innovative, high tech rear access door that incorporates a lightweight, vacuum formed insulation and a design that eliminates the need for expensive hinges and heavy davits. The 4S boiler uses no proprietary parts or gaskets on the boiler trim or the burner, ensuring easy availability of replacement parts.

Burnham Commercial, America's Boiler Company, is a manufacturer of commercial and institutional hydronic heating and boiler room equipment and has been designing and producing boilers for 140+ years. Burnham Commercial products are sold through the largest and most experienced network of sales representatives in the country. For more information see your Burnham Commercial representative, or go to

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