Bosch Tankless Water Heaters

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Model Number T9800 SE 199 is the Number 1 Seller
Learn More About Bosch Thermotechnology T9800 SE 199
Bosch Greentherm - 6.7 GPM at 60° F Rise - 0.96 UEF - Gas Tankless Water Heater - Direct Vent
Model: T9800 SE 199
EnergyStar Condensing Water Heater. Ultra Low NOx Emissions (SCAQMD Rule 1146.2 Compliant). Ratings: 10.0 GPM at 40
33% Buy This
5.0 out of 55.0 out of 55.0 out of 55.0 out of 55.0 out of 5(4)
$1,549.00
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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 may apply, see our full shipping policy for more details.
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Save 2% instantly by using our convenient "e-check" option or by simply mailing us a paper check. Yes, your order will be delayed slightly (5 business days). But, if you can wait, the savings are significant.
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Model Number T9800 SE 160 is the Number 2 Seller
Learn More About Bosch Thermotechnology T9800 SE 160
Bosch Greentherm - 5.4 GPM at 60° F Rise - 0.97 UEF - Gas Tankless Water Heater - Direct Vent
Model: T9800 SE 160
EnergyStar Condensing Water Heater. Ultra Low NOx Emissions (SCAQMD Rule 1146.2 Compliant). Ratings: 8.0 GPM at 40
19% Buy This
5.0 out of 55.0 out of 55.0 out of 55.0 out of 55.0 out of 5(3)
$1,299.00
Factory-Direct
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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 may apply, see our full shipping policy for more details.
2% Check Discount Icon
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Save 2% instantly by using our convenient "e-check" option or by simply mailing us a paper check. Yes, your order will be delayed slightly (5 business days). But, if you can wait, the savings are significant.
Add To Cart
Model Number T9800 SEO 199 is the Number 3 Seller
Learn More About Bosch Thermotechnology T9800 SEO 199
Bosch Greentherm - 6.7 GPM at 60° F Rise - 0.96 UEF - Gas Tankless Water Heater - Outdoor
Model: T9800 SEO 199
EnergyStar Condensing Water Heater. Low NOx Emissions. Ratings: 10.0 GPM at 40
19% Buy This
5.0 out of 55.0 out of 55.0 out of 55.0 out of 55.0 out of 5(3)
$1,449.00
Factory-Direct
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Free Shipping
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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 may apply, see our full shipping policy for more details.
2% Check Discount Icon
2% Check Discount
Learn More About 2% Check Discount
2% Check Discount
Save 2% instantly by using our convenient "e-check" option or by simply mailing us a paper check. Yes, your order will be delayed slightly (5 business days). But, if you can wait, the savings are significant.
Add To Cart
Model Number T9900I SE 199 is the Number 4 Seller
Learn More About Bosch Thermotechnology T9900I SE 199
Bosch T9900i SE 199 - 6.8 GPM at 60° F Rise - 0.96 UEF - Gas Tankless Water Heater - Direct Vent
Model: T9900I SE 199
EnergyStar Condensing Water Heater. Ultra Low NOx Emissions. (SCAQMD Rule 1146.2 Compliant). (< 40 ng/J or 55 PPM). Ratings: 11.2 GPM at 35° F Rise, 8.7 GPM at 45° F Rise, 7.2 GPM at 55° F Rise, 5.2 GPM at 75° F Rise. 199k Effective BTU/h.
11% Buy This
5.0 out of 55.0 out of 55.0 out of 55.0 out of 55.0 out of 5(3)
$1,879.00
Factory-Direct
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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 may apply, see our full shipping policy for more details.
2% Check Discount Icon
2% Check Discount
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2% Check Discount
Save 2% instantly by using our convenient "e-check" option or by simply mailing us a paper check. Yes, your order will be delayed slightly (5 business days). But, if you can wait, the savings are significant.
Add To Cart
Model Number T9900 SE 199 is the Number 5 Seller
Learn More About Bosch Thermotechnology T9900 SE 199
Bosch T9900 SE 199 - 6.8 GPM at 60° F Rise - 0.96 UEF - Gas Tankless Water Heater - Direct Vent
Model: T9900 SE 199
EnergyStar Condensing Water Heater. Ultra Low NOx Emissions. (SCAQMD Rule 1146.2 Compliant). (< 40 ng/J or 55 PPM). Ratings: 11.2 GPM at 35° F Rise, 8.7 GPM at 45° F Rise, 7.2 GPM at 55° F Rise, 5.2 GPM at 75° F Rise. 199k Effective BTU/h.
7% Buy This
5.0 out of 55.0 out of 55.0 out of 55.0 out of 55.0 out of 5(4)
$1,679.00
Factory-Direct
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Free Shipping
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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 may apply, see our full shipping policy for more details.
2% Check Discount Icon
2% Check Discount
Learn More About 2% Check Discount
2% Check Discount
Save 2% instantly by using our convenient "e-check" option or by simply mailing us a paper check. Yes, your order will be delayed slightly (5 business days). But, if you can wait, the savings are significant.
Add To Cart
Learn More About Bosch Thermotechnology T9800 SEO 160
Bosch Greentherm - 5.4 GPM at 60° F Rise - 0.97 UEF - Gas Tankless Water Heater - Outdoor
Model: T9800 SEO 160
EnergyStar Condensing Water Heater. Low NOx Emissions. Ratings: 8.0 GPM at 40
7% Buy This
5.0 out of 55.0 out of 55.0 out of 55.0 out of 55.0 out of 5(3)
$1,049.00
Was 
$1,249.00
SAVE $200.00
In-Stock
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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 may apply, see our full shipping policy for more details.
2% Check Discount Icon
2% Check Discount
Learn More About 2% Check Discount
2% Check Discount
Save 2% instantly by using our convenient "e-check" option or by simply mailing us a paper check. Yes, your order will be delayed slightly (5 business days). But, if you can wait, the savings are significant.
Add To Cart
Learn More About Bosch Thermotechnology T9900 SE 160
Bosch T9900 SE 160 - 5.5 GPM at 60° F Rise - 0.97 UEF - Gas Tankless Water Heater - Direct Vent
Model: T9900 SE 160
4% Buy This
5.0 out of 55.0 out of 55.0 out of 55.0 out of 55.0 out of 5(3)
$1,479.00
Factory-Direct
Freight Icon
Free Shipping
Learn More About Free Freight
Free Shipping
*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 may apply, see our full shipping policy for more details.
2% Check Discount Icon
2% Check Discount
Learn More About 2% Check Discount
2% Check Discount
Save 2% instantly by using our convenient "e-check" option or by simply mailing us a paper check. Yes, your order will be delayed slightly (5 business days). But, if you can wait, the savings are significant.
Add To Cart
Tools & Articles
Tankless Water Heater Buying Guide
How to Pick the Perfect Tankless Water Heater
Tankless Water Heater Sizing Guide
What Size Tankless Water Heater Do I Need
Bosch tankless water heaters continue the company's tradition of quality engineering, providing an efficient and responsive hot water solution. Fueled by either gas or electricity, and designed for whole-home or point-of-use applications, Bosch tankless hot water heaters provide amazing flexibility.