Product Overview

Superior Design
Buderus boiler sections are assembled with beveled, surface profiled push nipples for long,
trouble-free watertight operation. Flueways of Buderus boilers are sealed gas tight with
tongue and groove section design and elastic high temperature resistant sealing rope. This
seal is fully pressed into the groove during assembly to allow positive pressure operation.
A permanent dry door gasket ensures repeated positive sealing off of the full swing burner
door, producing a proven gas tight seal.
Putting Energy to Work
Buderus developed a full three-pass system which increases the efficiency of the boilers.
With single-pass boilers, the flue products have only one chance to heat the water. Buderus
three-pass boilers triple this opportunity. The unique way heat flows through the G215 and
G315 boilers allows the water to be heated three separate times. The full 3" thick thermal
insulation helps to maintain a higher water temperature even after the boiler has gone into
standby mode.
GL-180M Gray Cast Iron
Buderus GL-180M silicone injected, gray cast iron has excellent corrosion resistance,
exceptional casting characteristics, 40% greater flexibility and elasticity as well as high
thermal conductivity. Buderus developed the special substances that are impregnated
during the casting process to improve the mechanical properties of cast iron. The graphite
precipitates into smaller, modified flakes which produce GL-180M cast iron with 40%
greater elasticity and a high silicone barrier for corrosion protection. Gray cast iron obtains
its superior material characteristics primarily from a high carbon (graphite) and silicone
content. Additional elements further enhance the properties of the GL-180M. The graphite
appears in two different forms in the microstructure: nodular form producing excellent
tensile strength and great elasticity and graphite flakes producing excellent corrosion
resistance against acidic combustion products.
G215 – G315
Special compounds provide a
gas-tight seal for safe and efficient
operation. And, thanks to the
GL-180M cast iron’s amazing
flexibility, this boiler resists thermal
shock under conditions of rapid
temperature change.
Heating my home is never an issue
thanks to Buderus. Meticulous
standards and materials, such as
their patented GL180-M flexible
cast iron with tightly joined and
sealed sections with profiled,
beveled steel push nipples, ensure
years of hassle-free performance
when it matters most.