BUDERUS G115WS Boilers

Buderus G115WS Boiler Overview

The Buderus G115WS is an oil-fired cast iron boiler with an efficiency of 87% AFUE. It is constructed of flexible GL-180M cast iron which resists thermal shock during rapid temperature change. A modified three-pass flue design provides lower stack temperatures and higher efficiency, while a full 3″ jacket of thermal insulation around the entire block increases efficiency by lowering standby losses. A full swing burner door and front access plugs are designed to allow easy servicing of the unit.

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Consumer Reviews of Buderus G115WS


  • Very Satisfied
  • Somewhat Satisfied
  • Neutral
  • Somewhat Unsatisfied
  • Very Unsatisfied
  • #1 of 9 Buderus Boiler
  • 83.33% of customers recommended

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Buderus G115WS Boiler Reviews

Showing 6-6 of 6 reviews

"The best of the best"

5.0 rating
Very Satisfied

Had a new g115ws4 installed for $3000.00 w/ Riello f5. Runs like as well as a Finley tuned race machine. Every one that talks crap about it must not have it set up right. Fire your service man asap! Parts are cheap! Bad service is not! Good service is worth every penny!


Other G115WS Reviews

Based on comments from online HVAC forums, the Buderus G115WS is considered to be a good oil-fired boiler. Two separate posts on heatinghelp.com are from consumers asking for opinions on the G115WS versus a similar Weil McLain boiler, with the majority of professionals stating that the G115WS is a better unit.

G115WS Warranty

The warranty for the Buderus G115WS boiler is comprised of the following:

  • 1-year parts warranty
  • Lifetime heat exchanger warranty, prorated after the 10th year
  • 5-year oil burner warranty

Labor costs are not covered by the warranty.

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