Cast Iron Residential Oil Boiler
Often Imitated. Never Duplicated.
High Efciency - AFUEs Above 86% Flexible, Corrosion Resistant GL-180M Cast Iron Full Swing Burner Door for Excellent Serviceability Chimney and Direct Vent Options 74,000 to 120,000 BTU/Hr Output
Comfortable. Efcient. Intelligent Heating.

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A better way to heat your home.
The Buderus G115 boiler is designed and built to the highest industry standards. It extracts and delivers more heat from every fuel dollar. Acknowledged as the leader in high-efciency, low emission hydronic heating, Buderus offers innovative design, quality manufacturing, exceptional efciency and performance. A G115 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 industrys leading engineers, the G115 boiler has set the standard for the industry. With two ETL approved venting options either into a chimney or directly through the wall, the G115 allows a wide range of installation possibilities.
The modied three-pass boiler:
The G115 modied three-pass boiler is designed for: Optimized combustion with positive pressure-red 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 modied three-pass ue designs large heat transfer areas. Low standby losses with a full 3" jacket of thermal insulation around the entire block even underneath the boiler!

Comfortable

Keeping your home comfortable and warm is a high prioritybut it doesnt have to come at a high cost. Whether you heat by baseboard, panel radiators, hydro-air systems or radiant ooring, our advanced heating systems will provide many years of exceptional comfort and economy. Unlike a conventional boiler which heats and circulates water at only one temperature typically 170 to 180 F and keeps heating and circulating this high temperature water 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.

Efcient

Energy star ratings for boilers are based on an Annual Fuel Utilization Efciency (AFUE) rating, which is a ratio of the heat produced to the energy consumed on an annual basis. Not only is the Buderus G115 boiler Energy Star rated, but it is also designed for ease of installation and maintenance. With features like a compact dimension and integrated handles for ease of transporting, adjustable leveling legs, rear tappings and ue connection, bafes and clips for adjusting stack temperatures and a heavy gauge blue enameled jacket, a Buderus boiler is not only efcient, but it is easy to install. With a full swing burner door, which can be hinged on either the left or the right, and front access plugs which permit ushing of the boilers interior, the G115 can be thoroughly and properly cleaned in a fraction of the time it takes to clean a conventional boiler.
How it works. The ame res into the rst chamber. Then the ue products ow 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 nally exiting via the ue 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 efciency.

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Intelligent Heating By Design
The G115 is designed in Europe where fuel costs are signicantly higher and environmental regulations are more stringent. Using state of the art techniques in the design and manufacturing process, the G115 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 efciency and heat transfer is maximized. The patented Buderus GL-180M exible cast iron ensures that the boiler resists thermal shock under conditions of rapid temperature change. Sections are securely joined together and sealed by proled, beveled steel push nipples, ensuring a long life with no leakage. Special compounds provide a gas-tight seal for safe and efcient operation. The full 3" thermal insulation around the boiler, including underneath, increases efciency 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. 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 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 efciency, system longevity and minimized service calls when you insist on a Buderus tank and boiler. Convenient Logamatic Control
Manufactured with the patented Buderus GL-180M exible cast iron, the sections are tightly joined together and sealed by proled, beveled steel push nipples, ensuring a long life with no leakage.
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.

Special compounds provide a gas-tight seal for safe and efcient operation. And, thanks to the GL-180M cast irons amazing exibility, this boiler resists thermal shock under conditions of rapid temperature change.
Complete your system for added comfort to your home!
Once you have a Buderus boiler you can add a Buderus indirect red 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 ooring. Combined, this premium heating system will provide years of exceptional comfort and economy. for little more than cost of a standard replacement components.
The G115 shown with horizontal tank and Logamatic control. G115 and LT tanks can be used in any combination except for the G115/34 and the LT160.
" " " " " " " " " " " " " "

G115/21

G115/28

85.80 86.8% 20 1.10.20

G115/34

104 1.0 86% 25 2.12.20

All G115 KP Kits Include:
Performance Data Gross Output MBH 74 # of Sections 3 Net IBR MBH 64 Firing Rate (GBH).60-.75 AFUE 86.5 % Piping Connections Vent Connection Size 5 Supply 1 Return 1 Physical Dimensions Overall Boiler Length (L) 26 Boiler Block Length (LK) 21 Minimum Boiler Width 18 Boiler Width 23 Minimum Boiler Height 33 Height 34 Boiler Feet Spacing 13 Fire Box Depth (T) 16 Fire Box Volume cu. ft. 1.20 Dry Weight (lbs) 330 Water Content (gal) 8.7 Recommended Clearances for Ease of Serviceability Side 15 Rear 20
L7248C1006 aquastat Flexible oil line Circulator Flanges
NOTE: G115/21 Dual Firing Rate capability - from.60-.75 - is only available with Carlin EZ1 burner or Riello F3 burner. The higher the Firing Rate will result in a D.O.E. heating capacity of 90,000 BTU/Hr. and the Net IBR Rating of 77,000 BTU/Hr.
MEA# 358-91-E CRN# 1495.9c, 620.T

Clearance Requirements

Front Side Rear Top Galvanized Flex Vent Insulated Pipe Oil Vent AT-4 Exhaust Only Termination 1 FT-4 Concentric Termination 1
G1 direct vent installation tips 15 ETL approved with two 4" 90 elbows, and up to 6' of 4" regular smoke pipe for short vent runs. For longer runs, use up to 10' of flexible stainless steel insulated oil vent. Use 4" metal pipe for air intake. Use at least 6' to 8' of 4" metal pipe for air intake in conditioned space in cold climates (below 20F) Direct vent burners are equipped with pre-and post-purge cycles for safe, complete exhaust of all combustion products, while cooling oil burner nozzle for positive shut-off.

Buderus recommends the use of Becket, Carlin and Riello. Please refer to the Buderus trade price list for models.

9"

3"
4 13" 18" 5"

26"

AT-4 Aerocowl Termination
FT-4 Concentric Pipe-in-Pipe Termination
One of the two ETL certified terminations are required for use with G115 series boilers for direct vent applications. Both terminations are zero clearance systems for easy and versatile applications.
BBT North America Corporation 50 Wentworth Avenue Londonderry, NH 03053 Tel: (603) 552-1100 Fax: (603) 584-1681
Subject to change without notice 2006 Buderus Part Number 44499015-04/07