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SB Series Commercial Condensing Boilers

Its intelligent water channeling facilitates the condensation process and created even greater energy efficiency (up to 98%). The SB615 utilizes standard US burners and conventional controls and is a perfect match with thermostream boilers in multiple boiler systems. The SB615 and the SB735 are constructed with stainless steel fire tubes and a full three-pass flue design extracts latent heating and maximizes overall efficiency. Its simplified system design eliminates the need for dedicated boiler pumps, bypass and or shunt pumps.

  • Ultra High Efficiency - Up to 98%
  • No Restriction on Return Temperature and Flow Rates
  • Stainless Steel Hydro-Formed Fire Tubes for Long Life
  • Dual Returns Provide Unique Design Opportunities
  • Suitable for Natural Gas or Liquid Propane Forced Draft Burners
  • Low NOx and CO Levels, Meeting Air Quality Control Regulations
  • 484 to 4,079 MBH Output
  • Simple design eliminates the need for dedicated boiler pumps, bypass or shut pumps
  • Perfect match for Thermostream boilers in multiple boiler systems
MODELInput MBtuHOutput MBtuHNet IBR MBtuHHPCombustion Eff.Water Content Gal.Dimensions HxWxDDry Weight
SB615-240835.0 791.0 688.0 23.6 96.5 179.0 55.5 x 38.25 x 70 1950
SB615-3101080.0 1022.0 889.0 30.5 96.4 171.0 55.5 x 38.25 x 70 2030
SB615-4001393.0 1317.0 1145.0 39.3 96.3 180.0 63.5 x 38.25 x 70 2600
SB615-5101776.0 1678.0 1459.0 50.1 96.2 229.0 69.75 x 43.25 x 75.25 2970
SB615-6402228.0 2104.0 1830.0 62.8 96.2 223.0 69.75 x 43.25 x 75.25 3020
SB735-7902751.0 2650.0 2265.0 77.8 94.7 494.0 81.25 x 54 x 91.25 3811
SB735-9703378.0 3251.0 2827.0 97.0 95.6 660.0 81.25 x 54 x 108.25 4780
SB735-12004179.0 4079.0 3547.0 121.8 96.5 668.0 81.25 x 54 x 108.25 4855
SB615-145506.0 484.0 421.0 14.4 97.1 148.0 54.25 x 35.5 x 68.75 1690
SB615-185644.0 612.0 532.0 18.2 96.7 147.0 54.25 x 35.5 x 68.75 170

Warranty Information

  • Heat Exchanger for 120 months -
  • All Parts for 12 months -

Available Documents

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