SPB Immersion Fired Series

The SPB Immersion Fired Series of hot water boilers is well known throughout the industry for its unique single-pass design and burner technology. The single pass immersion firetube design delivers premixed air and gas through multiple burner nozzles. A corresponding flue tube (“firetube”), completely immersed in liquid, is aligned with the nozzle head inside the combustion chamber. Upon combustion, the nozzles generate a focused, high velocity flame which radiates down the center of each tube. The benefits of the technology in the SPB Immersion Fired Series hot water boilers include:

Natural Efficiency

• Up to 84% efficiency
• Radiant heat is maximized across the primary heating surface

Low Maintenance Cost and High Longevity

• Elimination of thermal shock due to balanced heat transfer across primary heating surface; allowing for up to 150° F ΔT
• Backed by a 20-year non-prorated thermal shock warranty
• Elimination of refractory breakdown due to single pass design (no refractory material is used)

Ease of Maintenance

• Hinged door provides quick access to burners, manifold and heating tubes for easy cleaning and routine maintenance
• Trimmed with non-proprietary components

Simplicity of Design

• No complex controls which require intensive training
• Fewer moving parts reduces incidence of failure and required retuning

Low NO_x and CO Emissions

• Less than 30ppm NO_x

_{Engineering data from the previous website can be found at: http://www.sellersengineering.com/engdata.asp . CAD drawing and design templates can be found at: http://www.sellersengineering.com/producttemp.asp}