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Unique S-Series hot water and steam boilers have a unique, patented design that allows for quick steam generation unlike anything else in the industry.

Cold to Steam in Under 20 Minutes

Sellers unique single pass steam or hot water boilers provide rapid response cold water to full load (steam) in under 20 minutes and digitally modulate to meet your load demands.

Sellers’ breakthrough design is thermally stable without any refractory which reduces repairs and maintenance.

Sellers Pre-Mix (gas/air) Burner feeds individual burner nozzles firing down corresponding tubes at 82,500 to 91,000 BTU input per tube. Even application of heat energy at the point of combustion eliminates thermal shock (and the myriad of associated issues) and allows relief of any possible energy buildup in the vessel through a rear relief door, which is unique in the industry.

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