Product Overview

G115WS
Cast Iron Residential Oil Boiler
Intelligent Heating—By Design
The G115WS is designed in Europe where fuel costs are significantly higher
and environmental regulations are more stringent. Using state of the art techniques in
the design and manufacturing process, the G115WS is built to maximize the heating
value of every ounce of fuel and constructed with the highest quality materials.
Manufactured without a heat-consuming refractory or target wall, service and
maintenance calls are minimized, while fuel efficiency and heat transfer is
maximized. The patented Buderus GL-180M flexible cast iron ensures that the
boiler resists thermal shock under conditions of rapid temperature change. Sections
are securely joined together and sealed by profiled, beveled steel push nipples,
ensuring a long life with no leakage. Special compounds provide a gas-tight seal
for safe and efficient operation. The full 3” thermal insulation around the boiler,
including underneath, increases efficiency by almost eliminating standby and stack
temperature losses.
Buderus, the World leader in heating technology, manufactures the highest quality
boilers based on centuries of experience. With its innovative design and quality
manufacturing, a Buderus boiler will outlast and out-perform virtually any other
residential hot-water system in the world.
Complete your system for added comfort to your home!
Once you have a Buderus boiler you can add a Buderus indirect fired hot water tank,
an optional Buderus Logamatic control or both. The Logamatic control maximizes
your comfort and fuel savings, it will also accommodate specialized heating
applications such as radiant flooring. Combined, this premium heating system will
provide years of exceptional comfort and economy... for little more than cost of a
standard replacement components.
Domestic Hot Water Tanks
Need domestic hot water? Then combine your Buderus boiler
with a Buderus indirect hot water tank. A Buderus tank is so
well insulated that it loses less than ¼º per hour. Available in a
vertical, or a horizontal space saving model that installs under the
boiler, these tanks have a higher recovery rate than stand alone
or tankless coil models. While a Buderus boiler works great with
any hot water tank—you can be sure of increased boiler efficiency,
system longevity, and minimized service calls when you insist on a
Buderus tank and boiler.
Convenient Logamatic Control
Adding a Buderus Logamatic control will give you the
ultimate in comfort and fuel savings. Microprocessor-based
controls allow the Logamatic to intelligently manage both your home heating and
domestic hot water. The Logamatic has 16 standard functions including day/night
setback, automatic summer/winter changeover and even a vacation mode. Set it
once and relax in the comfort of your warm home.
The Three-Pass Boiler
is Designed for
❚ Optimized combustion with positive
pressure-fired boilers and tailored
chamber geometry — no need for a
heat-consuming refractory or target wall
eliminating the need for costly repairs.
❚ Minimal stack losses with the
modified three-pass flue design’s
large heat transfer areas.
❚ Low standby losses with a full 3½" to
4" jacket of thermal insulation around
the entire block — even underneath
the boiler!
How It Works
The flame fires into the first chamber.
Then the flue products flow through
the second pass to the front of the
boiler. From there they reverse direction
again—moving through the third pass to
the back, and finally exiting via the flue
connection into the chimney. Because
the gases are held in the boiler longer
this allows the cast iron to absorb the
maximum amount of heat, resulting in
a lower stack temperature and a
higher efficiency.