Buderus Hydronic Systems G115WS User Manual

BUDERUS

Cast Iron Residential Oil Boiler

G115WS

The G115WS—designed and engineered to extract
and deliver more heat from every fuel dollar.

Improved Efficiency - 87% AFUE

Increase Comfort and Reduce Heating Costs.

Comfortable. Efficient. Intelligent Heating.

G115WS Series

A better way to heat your home

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. Acknowledged as the leader in high-efficiency, low emission hydronic

heating, Buderus offers innovative design and quality manufacturing with exceptional

efficiency and performance.

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 without the need

for additional piping or controls.

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 3" jacket

of thermal insulation around the entire
block—even underneath the boiler!

A G115WS cast iron oil boiler is ideal for new installations or as a replacement

for virtually any make or model of boiler. They are compatible with most hot water

tanks. Constructed with superior materials and designed by the industry’s leading

engineers, the G115WS boiler is raising the standard for the industry. With two

ETL approved venting options, either into a chimney or directly through the wall, the

G115WS allows a wide range of installation possibilities.

Comfortable

Keeping your home comfortable and warm is a high priority—but it doesn’t have

to come at a high cost. Whether you heat by baseboard, panel radiators, hydro-air

systems or radiant flooring, our advanced heating systems will provide many years

of exceptional comfort and economy. A conventional boiler heats and circulates

water at only one temperature—typically 170˚ to 180˚ F until the thermostat signals

it to stop. A Buderus boiler, especially when paired with the Logamatic control,

eliminates these room temperature swings by adjusting the boiler water temperature

to the current conditions, saving fuel while keeping you warm and comfortable.

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.