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G115WS Cast Iron Residential Oil Boiler

The Best Just Got Better. The Buderus G115WS boiler is based on the highly successful G115, the World’s best selling boiler. The G115WS has been redesigned and reengineered to extract and deliver more heat from every fuel dollar, and now has higher outputs at less cost per BTU.

  • Redesigned for Higher Outputs and Efficiency
  • High Efficiency - AFUEs Above 86%
  • Flexible, Corrosion Resistant GL-180M Cast Iron
  • Full Swing Burner Door for Excellent Serviceability
  • Chimney Vent or Direct Vent
  • Chimney Vent from 85,000 to 136,000 BTU/Hr Output
  • Direct Vent from 74,000 to 120,000 BTU/Hr Output
MODELOutput MBtuHIBR MBtuHFiring Rate GPHAFUEWater Content Gal.HxWxDWeight. Lbs.VENT CONNECTIONSSUPPLY/RETURN CONNECTION
G115WS-385.0 74.0 0.70 86.7 8.70 34.5 x 23.5 x 23.62 330 5"1.25 / 1
G115WS-4109.0 95.0 0.90 86.9 10.80 34.5 x 23.5 x 28.62 403 5"1.25 / 1
G115WS-5136.0 119.0 1.10 87.0 12.90 34.5 x 23.5 x 33.37 476 5"1.25 / 1

Warranty Information

  • Heat Exchanger - Limited Lifetime Warranty on Cast Iron Heat Exchanger in Residential Settings
  • All Parts for 12 months -

Available Documents

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