Bosch Greentherm T9900 SE 199 NG / LP Tankless Water Heater

By Bosch

Product Sizing
  • up to 4.4 GPM with a 50°C rise
  • on-demand hot water for 2-3 major applications
  • 199,000 BTU
Shipping Information
  • This item quallifies for $95 terminal shipping across Canada!
  • This item can be shipped directly to your address for an extra cost; contact our team for a personalized shipping quote.

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Yes, this product is Energy Star certified!

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Greener Homes Grant Eligibility

No, this product is not eligible for the Canada Greener Homes Grant, except possibly for Northern or off-grid communities.

Click to learn more about the Canadian Greener Homes Initiative and product eligibility here.

  • 15 Years Limited Heat Exchanger
  • 5 Years Limited Parts

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Best-in-Class Ultra-high Efficiency, On-demand, Tankless Gas Hot Water Heaters for Residential Homes & Apartments

The Bosch Greentherm T9900 SE 199 Condensing tankless water heater is an ultra-efficient, top performance, fully condensing gas tankless water heater from Bosch. The Greentherm T9900 is a 199,000 BTU/hr heater is designed for residential applications & can deliver up to 4.4 GPM with a 50°C rise!

With more than 99% thermal efficiency, the Greentherm T9900 SE 199 on-demand hot water heater can produce enough hot water for 2-3 major applications in most homes - think of the possibilities! Showering, laundry, and the dishwasher at the same time!

Bosch condensing gas tankless water heaters are ultra-efficient systems. Unlike traditional non-condensing water heaters, a condensing unit captures latent condensation heat from exhaust gas and uses the captured latent heat to preheat the incoming cold water, making Bosch condensing tankless water heaters up to 15% more efficient than a traditional tankless water heater.

Key features of the Bosch Greentherm T9900 SE 199 Tankless Gas Water Heater (T9900-SE-199):

  • Ultra-efficient, on-demand domestic hot water - 4.4 GPM of continuous hot water fed throughout your home
  • Tankless on-demand hot water solution, freeing up precious floor space in your home & eliminating costly hot water tank replacements
  • Built-in re-circulation pump will keep hot water ready at all your outlets (with an installed recirc loop)
  • Superior aluminum and copper heat exchanger construction captures up to 15% more heat energy than a traditional tankless water heater
  • Natural Gas burning, or with a conversion kit, propane
  • (Optional) WiFi accessory & app - connect another appliance to your 2.4 GHz Smart Home network. Keep your home connected, from anywhere, real-time!
  • Integrated Freeze protection (definitely nice in oh-so-warm Canada)
  • Modulating burner design with uniform flame coverage ensures greater efficiency and performance
  • Built-in turbulators reduce scale build up
  • Digital control panel and the ability to precisely adjust output temperatures - especially important in family homes or apartments with children
  • Clean combustion process achieves up to 99% thermal efficiency

If you have any questions additional questions regarding tankless gas water heaters, please visit our Support & Knowledge Center or contact us.

Installation services from only $500. To request a quote for installation from our trusted network of professionals, make sure to select "Yes - please connect me with a local professional" at checkout.

Note: it is possible to convert these natural gas water heaters to be propane compatible; please contact us directly for a conversion kit quote.

Safety warning: this is a gas appliance, and as such, requires certified, professional installation. Failure to properly install & commission a gas appliance can lead to serious damage, injury, or death.

More information regarding Bosch Greentherm T9900 SE 199 Gas Tankless water heaters can be found below:

Bosch Thermotechnology Gas Tankless Water Heaters

Bosch Greentherm 9000 Series Product Brochure

Bosch Condensing Tankless Technology

Energy Saving Info by Bosch Thermotechnology

Product Dimensions & Sizing Approximations:


Water Tank Capacity BTU/Hr Input Dimensions (H x W x D)
T9900 SE 199 endless hot water on demand* 199,000 BTU/Hr

31.5" x 18.6" x 9.8"

(80 x 47.2 x 25 cm)

*endless so long as your gas & water supplies continue. Shower for as long as you desire.