Buderus 109K 87.0% Hot Water Oil Boiler Chimney Vent For G115WS/4

Model: G115WS/4 Item Number: 37425
Buderus G115WS/4
Buderus G115WS/4
Enlarge Image
Our Price: $2,868.00
synchrony card icon
$51 / Month
With our 86 months 11.99% APR*
86 fixed monthly payments required.
Ships in 3-4 Weeks
Buderus 109K 87.0% Hot Water Oil Boiler Chimney Vent For G115WS/4
Buderus 109K 87.0% Hot Water Oil Boiler Chimney Vent For G115WS/4 Model: G115WS/4 Item Number: 37425
Product Q&A
Shipping Crate Icon
Free Shipping Learn More
Free Shipping
*This product qualifies for Free Shipping anywhere in the contiguous US. Accessories may ship separately. Items over 100lbs shipped via semi-truck, be sure to select "Lift Gate" to lower the product to the ground curbside. Remote area surcharges map apply, see our full shipping policy for more details.
Truck Icon
Free Lift Gate Learn More
Free Lift Gate
*This product qualifies for Free Lift Gate Service. Items over 100lbs normally ship via semi-truck. Select this service if you need the product lowered to the ground curbside. To learn more about Lift Gate Service, read our shipping policy.
Specification Highlights
    New Learn More
    This product is new and has never been used. It's in its original packaging, which has not been opened.
    403 Pounds Learn More
    403 Pounds
    Total weight of the product and any included accessory/components. This total is not the shipping weight, as it does not include packing material, which may increase the overall shipping weight of this product.
    Product Category
Recommended Accessories
View More
Required Accessories Add All Required
Installation Accessories
View More


Overview for Buderus G115WS/4

The Buderus G115WS is an advanced oil boiler capable of impressive efficiencies. The stainless steel burner (sold separately) has the capability to pre-mix fuel and oxygenated air before combustion, resulting in a cleanly burning flame that emits remarkably low emissions. The G115WS has the ability to automatically adjust boiler heat to meet temperature demand using an outdoor reset control, both increasing efficiency and dramatically increasing the life of the boiler. An insulating enclosure and patented flexible cast iron rounds of a boiler package that will last you for years to come.
  • Ideal for New Installations or Renovations
  • The G115WS boiler is ideal for both new construction and renovations of aged housing. Two ETL approved venting options ensure that proper venting can be achieved in old or new construction.
  • Auto Adjusting Boiler Temperature
  • Conventional boilers typically operate at a set temperature at all times. The G115WS, however, changes its internal water temperature to suit outdoor conditions. This dramatically increases efficiencies and boiler life.
  • Included Leveling Legs
  • Included with the G115WS boiler are a set of adjustable legs, allowing the boiler to remain level even on inclined surfaces.
  • Flexible Cast Iron
  • The heat exchanger of the Buderus G115WS boiler is made of patented flexible cast iron, allowing the boiler to resist even the most punishing thermal shock.
  • Specifications
    View More


    Product Category
    General Information
    Product Line
    Product Category
    Medium Learn More
    Medium refers to the substance that carries heat through the heating system. Systems are either designed to use either Hot Water or Steam as a medium, and components are usually specific to one or the other.
    Hot Water
    Heat Exchanger Material
    Cast Iron
    Fuel Type Learn More
    Fuel Type
    To create heat, some form of fuel is required. Fuel Type specifies what the product uses as an input to create heat.
    Combustion Type Learn More
    Combustion Type
    Condensing appliances use leftover thermal energy from combustion gases to heat water in a secondary heat exchanger, resulting in higher efficiency and lower exhaust temperature.
    Vent Type Learn More
    Vent Type
    Products that use combustion (burning) of fuel to create heat also create potentially dangerous gasses that need to be exhausted (AKA "Vented"). Depending on the product, venting can be done via a chimney, through a side wall, or use a second vent to provide fresh air to the appliance.
    Chimney or Direct Vent
    DHW Production Learn More
    DHW Production
    DHW (Domestic Hot Water) is potable water for uses other than space heat. Some boilers are able to provide DHW "out of the box", while others can do so with the purchase of optional accessories.
    Modulating/Staging Learn More
    Stages are unique speeds or levels that equipment can operate at. More stages allow for better fine-tuned control of output, which improves comfort and efficiency. Modulating equipment can operate across a range of levels, giving the highest level of fine-tuned control.
    Mount Type
    Maximum Altitude
    2000 Feet
    Assembly Type
    Includes Pump
    Included with Burner Kit
    Burner Model
    Sold Separately
    AFUE Learn More
    AFUE (Annual Fuel Utilization Efficiency) measures the efficiency of combustion equipment over the entire heating season, and is calculated by dividing the amount of energy that is actually heating your home by the total energy contained in the fuel used by the boiler/furnace.
    87 %
    Input Rate
    0.9 GPH
    DOE Heating Capacity Learn More
    DOE Heating Capacity
    Also referred to as Gross Output, this is the output of a boiler after accounting for combustion efficiency. We recommend sizing hot water boilers based on the DOE Heating Capacity.
    109000 BTU
    Net I=B=R Capacity Learn More
    Net I=B=R Capacity
    I=B=R, also referred to as Net Output or AHRI Capacity, is the rated heat output of a boiler after accounting for combustion efficiency, piping loss, and an extra pickup factor. We recommend sizing steam boilers based on the I=B=R rating.
    95000 BTU
    Electrical Data
    120 Volts
    60 Hz
    Fluid Content
    10.8 Gallons
    Flue Connection Size
    5 Inches
    Supply Connection
    1 1/4 Inches
    Return Connection
    1 Inch
    Product Height
    30 3/8 Inches
    Product Width
    23 2/3 Inches
    Product Depth
    28 2/3 Inches
    Product Weight
    403 Pounds
    IBR Listed
    Warranty Information
    Parts Warranty Show ACW Parts Warranty Learn More
    Parts Warranty
    A warranty is a safeguard from defects in manufacturing and can vary in length and terms. Some manufacturers require registration for extended warranty benefits, be sure to check out features and the warranty document. To see the manufacturer's warranty statement, click on the Manuals tab. Learn More
    1 Year
    Heat Exchanger Warranty
    Lifetime Years
    View More


    Do You Own This Product?

    Give us your opinion on this product and help any future buyer's make an informed decision.

    Product Q&A
    View More

    Product Q&A

    Be the first to ask a question.

    Whether it's a general or technical question ACWholesalers can help. Our customer service team is backed by years of experience so you can have confidence knowing that you'll be getting an insightful response.

    View More
    Buderus 109K 87.0% Hot Water Oil Boiler Chimney Vent For G115WS/4
    Buderus G115WS/4
    Customer Review Images
    Scroll Up ArrowTo Top