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Description
Bosch Greentherm T9800 SE 199,000 BTU Propane Tankless Water HeaterSummary Bosch Greentherm T9800 provides you with endless, on demand hot water for your home or business. This is the largest liquid propane 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 liquid propane 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
- Energy Source: Liquid Propane
- 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:
- 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
4.6 ★★★★★
Based on 8 reviews
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Product Reviews
★★★★★ 4
Awesome, portable room divider for larger rooms
Color: Black, Color: Black
I chose this room divider to use in my son's room that also serves as my home office! It is 72" x 72" in size, so it truly blocks out the other side of the room for optimal privacy. Once it's assembled, it's mildly sturdy - as long as you can bet both ends with the "feet" in line with the ground. I wish that the framework poles had more of an interlocking system so that the divider was easier to erect. I assembled this on carpet, so I had some issues getting the divider to stop moving. It takes a lot of work to set up, as it is massive, so definitely have someone help you. I would suggest adding weights of some sort to the feet of this divider to keep it from shifting. I ended up leaning mine against a bookcase shelf so it wouldn't lean. All and all, this is a great product if you are looking to make a room multipurpose.
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Reviewed in the United States on August 2, 2025
★★★★★ 5
As described
Color: Black
Light weight, easy to put together and you can disconnect the ends and just roll the whole thing nice and tight for quick out of the way storage. Pretty sturdy, doesn't fall over if you bump into it, you could use it outside but if there's a lot of light you can see through a tiny bit if you're really close but I only tested this indoors so not sure about patio types
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Reviewed in the United States on December 18, 2025
★★★★★ 2
Flimsy - choose something else
Color: Black
Very flimsy and barely stands up… better options out there.
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Reviewed in the United States on October 11, 2025
★★★★★ 5
Versatile Room Divider With Easy Assembly and Strong Coverage
Size: 3 Panel 12FT W
I picked up this Siebwin 3-panel folding room divider mainly for privacy and room separation, and overall it works very well.
Assembly is very straightforward, and the divider can be set up, taken apart, and stored without much effort. The fabric quality feels good, and the frame construction is stronger and more stable than expected. The support tubes especially feel well built and help keep the divider standing securely.
One feature I really liked is the flexibility of the design. The panels can be used together as a complete divider or separated depending on the setup and available space. That makes it much more versatile for different room layouts or temporary privacy needs.
The coverage is also very good, and the size matches the manufacturer’s description accurately. The fabric blocks light and background visibility well enough to provide solid privacy without feeling overly heavy. The wider feet also help improve stability compared to thinner folding dividers.
Another positive detail is that everything arrived complete with no missing parts or damaged pieces, which made assembly much easier and faster.
Compared to cheaper privacy screens, this one feels more durable and easier to customize depending on the situation. In terms of value for the money, it feels like a very practical and worthwhile purchase considering the size, flexibility, and build quality.
Overall, a versatile and well-built room divider with easy assembly, strong privacy coverage, stable construction, complete included parts, flexible panel configuration, and excellent everyday functionality.
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Reviewed in the United States on May 27, 2026
★★★★★ 5
Stable, flexible in deployment configuration, creates true privacy and looks great.
Size: 3 Panel 12FT W
This is the second room divider panel I have installed, and there are several features about this one that I like much better than my older one.
The fact that there are no gaps and that the material is thicker means you get more privacy or more hiding power, if you wish. My older divider has vertical spaces between each of the panels and the panels are half as wide as the Siebwin panels, so there are many vertical spaces. The Siebwin divider really creates privacy.
Another feature that I really appreciate is that the legs are wider and stand off from the floor. On my older one the legs are flat and they're rather awkward to adjust because they create more drag on the floor. The feet on the older one also loosen if you turn them counter clockwise, so adjustments of configuration that require the feet to be moved are more complex.
The older divider also must be deployed in a zig-zag fashion because he feet are not as wide, but this new one can be deployed and stable in a straight, an "N" shape or an arc. They are both the same length, but because the older one must be use in a zig-zag deployment it doesn't reach to the length of the new one.
The Siebwin divider definitely costs more at $103.48, but it sports several features and advantages over the other brand, so it does a better job and is worth the extra cost.
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Reviewed in the United States on May 25, 2026