SKU: 43362545794

Bosch Greentherm T9800 SE 199,000 BTU Natural Gas Tankless Water Heater

Sale price$1102.50 Regular price$1225.00
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Description

Bosch Greentherm T9800 SE 199,000 BTU Natural Gas Tankless Water HeaterSummary Bosch Greentherm T9800 provides you with endless, on demand hot water for your home or business. This is the largest natural gas tankless hot water heater Bosch has to offer. Created with Bosch's quality engineering and manufacturing, this unit is designed to run for up to 15 years if properly maintained. Typically, all hot water heaters we offer can be on the way to you within 1 2 business days. Why Choose Bosch? Bosch Greentherm is unique

Summary

Bosch Greentherm T9800 provides you with endless, on-demand hot water for your home or business. This is the largest natural gas tankless hot water heater Bosch has to offer. Created with Bosch's quality engineering and manufacturing, this unit is designed to run for up to 15 years if properly maintained.  Typically, all hot water heaters we offer can be on the way to you within 1-2 business days.

Why Choose Bosch? 

Bosch Greentherm is unique because all plumbing connections are made from the top of the unit. This saves you on labor and material cost since it takes less time and materials to transition from a tanked water heater to new tankless water heater. A quality system plus an easy install is what keeps Bosch at the top of rankings. 

General Information

  • Unit Type: Water Heater
  • Product Line: T9800
  • Unit Size: 199,000 BTU/H
  • Wifi Enabled: No (Add Wifi Kit)
  • Recirculation Pump Included: No (Add Recirculation Pump)
  • Isolation Valves Included: No (Add Isolation Valves)
  • Propane Conversion Kit: No (Add Propane Conversion Kit)

Product Details

  • Space-saving, state-of-the-art tankless design
  • Ultra-efficient with UEF ratings up to 0.96
  • High-resolution color LCD interface
  • Wi-Fi accessory & App increases functionality
  • Ability to control external pumps
  • Industry-leading 22:1 turn down ratio
  • 60ft venting using 2" pipe
  • Ultra-Low NOx Certified
  • Integrated freeze protection
  • Stainless Steel condensing heat exchanger

Installation Dimensions

  • 18 9/16" W x 37" H x 9 13/16" D
  • Weight: 78 lbs
  • Indoor hung
  • 2" exhaust & intake

Warranty Information

  • Standard Recirculation: 1-year labor, 5-year parts, 15-year heat exchangers
  • Uncontrolled Recirculation: 1-year labor, 3-year parts, 5-year heat exchangers
  • DISCLAIMER: Unit must be installed by Bosch ABC Contractor or a Licensed Plumber
  • Bosch requires a Licensed Plumber to call technical support in a breakdown emergency. 

Certifications

  • Energy Star: Yes
  • UEF: 0.96
  • Efficiency: 99%
  • AHRI Certified: Yes

 Technical Specifications:

Flow Rate Unit T9800 SE 199
Maximum flow rate at a 35 °F (19.4 °C) rise GPM (l/min) 11.2 (42.4)
Maximum flow rate at a 45 °F (25 °C) rise GPM (l/min) 8.7 (32.9)
Maximum flow rate at a 55 °F (30.6 °C) rise GPM (l/min) 7.2 (27.5)
Maximum flow rate at a 75 °F (41.7 °C) rise GPM (l/min) 5.2 (19.7)
Maximum flow rate at a 90 °F (50 °C) rise GPM (l/min) 4.4 (16.6)
Maximum gas input¹ BTU/hr (kW) 199,000 (58.3)
Minimum input² BTU/hr (kW) 9,000 (2.6)
Maximum output BTU/hr (kW) 197,010 (57.7)
Thermal efficiency (Efficiency in %) % > 99%
Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 43362545794

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J
Verified Purchase
jounna.zei
Fort Morgan, US
★★★★★ 1
Do not buy
Color: Silver
The worst frother i've ever used. You can't even turn it off without having to go through all the different modes, meaning you will get absolutely splashed and have to clean all the little droplets of whatever you were frothing. The power is weak. The battery did last a long time, I'll give them that. 3 months ON THE DAY the frother stopped working. A very loud noise and decreased power made it unusable. I sent them an email with NO response.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 28, 2026
K
Verified Purchase
Katherine
Massapequa, US
★★★★★ 5
Mixes drinks well and holds a charge
Color: Silver
I bought this frother to replace a weaker frother I had been using for months. I make iced lattes with instant espresso powder, water, and milk, and this frother does a great job at mixing the powder into the water/milk. It also leaves a nice 1" or so of milk froth on the top. I love that it can be charged with a USB-C cable and doesn't require batteries like many frothers do. It's very powerful for the size.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on June 7, 2026
A
Verified Purchase
Amazon shopper
Battle Creek, US
★★★★★ 5
Great Little Gadget
Color: C-Black, Size: Model C Rechargeable
What a fun and easy to use gadget! I use it to foam Zero Sugar Coffeemate creamer for my iced coffee and it works perfectly. I thought the on/off button was on the top but it's on the side. I was concerned that I would unintentionally bump it but I don't. Easy to use, easy to clean and price is reasonable.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 2, 2026
B
Verified Purchase
Billy
Waukegan, US
★★★★★ 4
Good speed
Color: C-Black, Size: Model C Rechargeable
Love the rechargeable feature, works great as a frother, however, I have to get use to the on/off feature instead of the press to froth like the older unit.
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Reviewed in the United States on March 22, 2026
L
Verified Purchase
Lady J
Louisville, US
★★★★★ 5
Hold on tight! Has the strength to spin right out of your hands. 😀
Color: C-Stand Black, Size: Model C Rechargeable
What a pleasant surprise to experience this double whisk Electric Milk Frother!! The sheer power is incredible. Makes the most delicious blended Green Tea Match Latte, Dalgona Coffee and Mochas! The only "con" happened yesterday when I was frothing my Green Tea and the device just suddenly stopped! At the time, I wished that there was some sort of colored bulbs or other way of determining charge levels. A remarkably strong Milk Frother!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 7, 2026

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