A.O. Smith 100 Gal. Storage 97% Efficiency NG Water Heater Direct Vent

Model: BTH-199 Item Number: 73380
A.O. Smith Commercial BTH-199
A.O. Smith Commercial BTH-199
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A.O. Smith 100 Gal. Storage 97% Efficiency NG Water Heater Direct Vent
A.O. Smith 100 Gal. Storage 97% Efficiency NG Water Heater Direct Vent Model: BTH-199 Item Number: 73380
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*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.
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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.
    523 Pounds Learn More
    523 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
    Water Heater - Commercial
Tank Size (Gallons)
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Fuel Type
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Fuel Type
To create heat, some form of fuel is required. Fuel Type specifies what the product uses as an input to create heat.
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First Hour Delivery (Gallons)
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Recommended Accessories
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Overview for A.O. Smith Commercial BTH-199

A.O. Smith has led the way in innovative hot water solutions for nearly 80 years. The Cyclone Mxi is a highly efficient commercial water heater that has a rated thermal efficiency of 97% due to the modulating burner. Built with reliable components, the Cyclone Mxi provides you with years of hot water with minimal service needed. With its 100 gallon tank and easy to read display, the BTH-199 is ready to fulfill all of your hot water needs.
  • Helical Coil Heat Exchanger
  • The Cyclone Mxi line features a spiral heat exchanger that is positioned in the center of the unit for uniform heat distribution. It also allows the combustion gases to stay in the tank longer, lengthening the heat cycle and providing higher efficiency.
  • PermaGlass® Ultra Coat™
  • The tank has been coated using an industry exclusive glassing process where the coating is applied as a liquid and then mechanically rotated to ensure an even coat that provides protection against corrosion.
  • Fully Modulating Combustion
  • Modulating the burner results in higher operating efficiencies and longer service life by adjusting the firing rate as the demand changes.
  • Powered Anodes
  • All Cyclone Mxi models come with a titanium powered anode. A Powered anode works in all water conditions and never need replacing. It eliminates the possibility of odors usually related to standard anodes.
  • User-Friendly Electronic Interface
  • The intelligent control system, with easy to navigate menu, provides precise temperature control and unit operating information.
  • Venting Versatility
  • The Cyclone MXI line can be vented vertically or through a side wall. They can also have separate venting for the intake and exhuast or by using a concentric venting assembly.
  • iComm™ Compatible
  • These heaters are compatible with the iCOMM™ module, allowing them to be monitored remotely.
  • Specifications
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    Product Category
    Water Heater - Commercial
    General Information
    Gas Water Heater
    Product Line
    Cyclone Mxi
    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
    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.
    Natural Gas
    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.
    Direct Vent
    Storage Type
    Mount Type
    100 Gallons
    Maximum Input Capacity Learn More
    Maximum Input Capacity
    The Maximum Input Capacity describes how quickly the appliance will use fuel when delivering it's maximum capacity. The units may change depending on the fuel being used.
    199900 BTU
    First Hour Delivery Learn More
    First Hour Delivery
    Sometimes called First Hour Rating, this is the number of gallons of hot water the heater can supply per hour when starting with a fully heated tank. The recovery of the water heater depends on your boiler's BTU and boiler output temperature.
    305 Gallons
    Continuous Recovery Rate
    261 Gallons
    Efficiency Type
    Thermal Efficiency
    97 %
    Ultra Low NOx Emissions Learn More
    Ultra Low NOx Emissions
    NOx is a byproduct of the combustion process, and it's output is regulated in some jurisdictions. Many regulators mirror SCAQMD rules, which regulate air quality for some parts of Southern California. Ultra Low NOx appliances emit less than 10-14 ng/J (nanogram per Joule) of NOx.
    Electrical Data
    60 Hz
    Recommended Breaker Size
    15 Amps
    Primary Vent Pipe Diameter
    3 Inches
    Gas Connection Size
    3/4 Inch
    Cold Water Inlet
    1 1/2 Inches
    Hot Water Outlet
    1 1/2 Inches
    Product Height
    75 1/2 Inches
    Product Width
    27 3/4 Inches
    Product Depth
    27 3/4 Inches
    Product Weight
    523 Pounds
    Shipping Weight
    523 Pounds
    CSA Listed
    UL Listed
    Energy Star Listed
    AHRI Certified
    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
    Vessel Warranty
    3 Years
    5.0 out of 5 stars5.0 out of 5 stars
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    Product Q&A
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    A.O. Smith 100 Gal. Storage 97% Efficiency NG Water Heater Direct Vent
    A.O. Smith Commercial BTH-199
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