Bosch Thermotechnology T9900I SE 199
Bosch Thermotechnology T9900I SE 199
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Bosch T9900i SE 199 - 6.8 GPM at 60° F Rise - 0.96 UEF - Gas Tankless Water Heater - Direct Vent


T9900I SE 199

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Bosch T9900i SE 199 - 6.8 GPM at 60° F Rise - 0.96 UEF - Gas Tankless Water Heater - Direct Vent
Bosch T9900i SE 199 - 6.8 GPM at 60° F Rise - 0.96 UEF - Gas Tankless Water Heater - Direct Vent
Model: T9900I SE 199
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Expert Recommended Accessories Selected by Bob, our Expert
Required Accessories 9
These accessories are required to properly setup/install this product.
Optional Accessories 10



Natural Gas



# of Showers


Energy Factor


Energy Star Certification


    Bosch's Greentherm tankless water heaters provide whole home hot water while featuring some the best efficiency ratings on the market. Greentherm water heaters boast an impressive 0.96 Uniform Energy factor, which allows them to meet your hot water needs while not draining your wallet. The 9000 series features Bosch's plug n' play design making installation a breeze when paired with its multiple venting options. Built-in Wi-Fi connectivity gives you complete control of your hot water at your fingertips.
  • Optiflow Management Technology
  • This water heater features Bosch's Optiflow system, which uses self-calibrating sensors to automatically configure flue length, gas type, and altitude without a gas analyzer.
  • Built-In Recirculating Pump
  • The Greentherm T9900 Series features a built in recirculating pump to maximize efficiency and comfort with hot water on demand.
  • Easy to Install
  • Bosch Greentherm water heaters come with a flexible and compact plug n' play design, top hydraulic connections, and bottom flush ports making them perfect to replace old tank-type heaters.
  • Built-In Digital Control Panel
  • The Greentherm tankless hot water heaters have a digital control panel on the front of your unit to adjust temperature and to make sure your system is running properly.
  • Active Bypass
  • All Greentherm models come with an automated, fully modulating bypass for temperature stability to ensure you have a constant and accurate temperature.
  • Convenient Gas Hook Up
  • The ability to use an existing 1/2" gas line makes the Greentherm an ideal option for storage tank retrofits.
  • Premium Design
  • Greentherm T9900i SE has a sleek, shatterproof glass front making it as beautiful as it is efficient.
  • Wi-Fi Ready
  • Control your water heater with the push of a button using the Bosch Wi-Fi app, available in the Apple Store and Google Play.
  • Simple Gas Conversion
  • Bosch Greentherm water heaters are shipped to run on natural gas out of the box but can be easily converted to run on liquid propane with a push of a button during installation.
California residents see
Warning: This product can expose you to chemicals including Lead which is known to the State of California to cause Developmental Harm.
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T9900I SE 199
specs product image PID-83201
General Information
Tankless Water Heater
Product Line
Medium Learn More
Hot Water
Fuel Type Learn More
Natural Gas
Combustion Type Learn More
Vent Type Learn More
Direct Vent
Venting Category Learn More
Storage Type
Mount Type
Installation Location
Includes Pump
Gas Conversion Kit
Maximum Input Capacity Learn More
199000 BTU
Minimum Input Capacity
9000 BTU
Flow Rate at 35F Temperature Rise Learn More
11.2 GPM
Flow Rate at 45F Temperature Rise Learn More
8.7 GPM
Flow Rate at 55F Temperature Rise Learn More
7.2 GPM
Flow Rate at 60F Temperature Rise Learn More
6.8 GPM
Flow Rate at 75F Temperature Rise Learn More
5.2 GPM
Uniform Energy Factor Learn More
Energy Factor Learn More
Minimum Flow Rate
0.45 GPM
Ultra Low NOx Emissions Learn More
Electrical Data
120 Volts
60 Hz
Primary Vent Pipe Diameter
3 Inches
Gas Connection Size
3/4 Inch
Cold Water Inlet
3/4 Inch
Hot Water Outlet
3/4 Inch
Product Height
31 1/2 Inches
Product Width
18 29/48 Inches
Product Depth
9 41/48 Inches
Energy Star Listed
CSA Listed
AHRI Certified
UPC Listed
AHRI Reference Number
Warranty Information
Parts Warranty Learn More
5 Years
Heat Exchanger Warranty
15 Years


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Bosch T9900i SE 199 - 6.8 GPM at 60° F Rise - 0.96 UEF - Gas Tankless Water Heater - Direct Vent
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