Indoor Tankless Water Heaters

Shop By Brand
Shop By Fuel Type
Shop By Vent Type
Filter ▼
Learn More About State Water Heaters GTS-240X3-PIHacw-sale-badge
State X3 - 5.1 GPM at 60° F Rise - 0.94 UEF - Propane Tankless Water Heater - Indoor
Write A Review
EnergyStar Condensing Water Heater. Ultra-Low NOx (14 ng/J or 20 ppm). Ratings: 6.7 GPM at 40° F Rise, 6.1 GPM at 50° F Rise, 5.1 GPM at 60° F Rise, 4.3 GPM at 70° F Rise. 160k Max BTU/h.
Item#: 123237
Model#: GTS-240X3-PIH
Brand: State Water Heaters
$1,295.00
Free Shipping
Learn More
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 map apply, see our full shipping policy for more details.
Factory-Direct
State X3 - 5.1 GPM at 60° F Rise - 0.94 UEF - Propane Tankless Water Heater - Indoor
Learn More About Rinnai RSC160INacw-sale-badge
Rinnai Sensei™ - RSC160 - 5.2 GPM at 60° F Rise - 0.93 UEF - Gas Tankless Water Heater - Direct Vent
Write A Review
Item#: 123584
Model#: RSC160IN
Brand: Rinnai
$1,878.76
Free Shipping
Learn More
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 map apply, see our full shipping policy for more details.
In-Stock
Rinnai Sensei™ - RSC160 - 5.2 GPM at 60° F Rise - 0.93 UEF - Gas Tankless Water Heater - Direct Vent
Learn More About Rinnai RE160INacw-sale-badge
Rinnai RE Series -RE160 - 4.4 GPM at 60° F Rise - 0.81 UEF - Gas Tankless Water Heater - Concentric Vent
Write A Review
Item#: 124521
Model#: RE160IN
Brand: Rinnai
$905.10
Free Shipping
Learn More
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 map apply, see our full shipping policy for more details.
In-Stock
Rinnai RE Series -RE160 - 4.4 GPM at 60° F Rise - 0.81 UEF - Gas Tankless Water Heater - Concentric Vent
Learn More About Rheem Tankless RTGH-90DVLN-3acw-sale-badge
Rheem RTGH - 5.8 GPM at 60° Rise - Gas Water Heater - Direct Vent
Write A Review
Item#: 151482
Model#: RTGH-90DVLN-3
Brand: Rheem Tankless
$1,336.00
Free Shipping
Learn More
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 map apply, see our full shipping policy for more details.
In-Stock
Rheem RTGH - 5.8 GPM at 60° Rise - Gas Water Heater - Direct Vent
Learn More About Rheem Tankless RTGH-95DVELP-3acw-sale-badge
Rheem RTGH - 6.4 GPM at 60° Rise - Propane Water Heater - Direct Vent - Built-In Wi-Fi
Write A Review
Item#: 151485
Model#: RTGH-95DVELP-3
Brand: Rheem Tankless
$1,370.00
Free Shipping
Learn More
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 map apply, see our full shipping policy for more details.
In-Stock
Rheem RTGH - 6.4 GPM at 60° Rise - Propane Water Heater - Direct Vent - Built-In Wi-Fi
Learn More About Takagi T-H3-DV-LPacw-sale-badge
Takagi 199,000 BTU Tankless Water Heater Propane Direct Vent
3.5 out of 5 stars 3.5 out of 5 stars
(2)
EnergyStar Condensing Water Heater. Low NOx Emissions (< 40 ng/J or 55 PPM). Ratings: 9.5 GPM at 40° F Rise, 7.5 GPM at 50° F Rise, 6.3 GPM at 60° F Rise, 5.4 GPM at 70° F Rise. 189k Effective BTU/h.
Item#: 70550
Model#: T-H3-DV-LP
Brand: Takagi
$1,269.00
Free Shipping
Learn More
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 map apply, see our full shipping policy for more details.
Factory-Direct
Takagi 199,000 BTU Tankless Water Heater Propane Direct Vent
Learn More About Takagi T-H3S-DV-LPacw-sale-badge
Takagi 180,000 BTU Tankless Water Heater Propane Direct Vent
5.0 out of 5 stars 5.0 out of 5 stars
(1)
EnergyStar Condensing Water Heater. Low NOx Emissions (< 40 ng/J or 55 PPM). Ratings: 8.0 GPM at 40° F Rise, 6.8 GPM at 50° F Rise, 5.7 GPM at 60° F Rise, 4.8 GPM at 70° F Rise. 171k Effective BTU/h.
Item#: 70558
Model#: T-H3S-DV-LP
Brand: Takagi
$1,142.00
Free Shipping
Learn More
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 map apply, see our full shipping policy for more details.
Factory-Direct
Takagi 180,000 BTU Tankless Water Heater Propane Direct Vent
Learn More About Bosch Thermotechnology T9800 SE 160acw-sale-badge
Bosch 160,000 BTU .92 UEF Tankless Water Heater Indoor Direct Vent
5.0 out of 5 stars 5.0 out of 5 stars
(1)
EnergyStar Condensing Water Heater. Ultra Low NOx Emissions (SCAQMD Rule 1146.2 Compliant). Ratings: 8.0 GPM at 40
Item#: 73648
Model#: T9800 SE 160
Brand: Bosch Thermotechnology
$1,534.00
Free Shipping
Learn More
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 map apply, see our full shipping policy for more details.
Factory-Direct
Bosch 160,000 BTU .92 UEF Tankless Water Heater Indoor Direct Vent
Learn More About Rheem Tankless RTG-70DVLPacw-sale-badge
Rheem 160,000 BTU Tankless Water Heater Propane Concentric Vent
5.0 out of 5 stars 5.0 out of 5 stars
(1)
EnergyStar Non-Condensing Water Heater. Ultra Low NOx Emissions (SCAQMD rule 1146.2 Compliant). Ratings: 6.5 GPM at 40° F Rise, 5.4 GPM at 50° F Rise, 4.5 GPM at 60° F Rise, 3.9 GPM at 70° F Rise.
Item#: 97834
Model#: RTG-70DVLP
Brand: Rheem Tankless
$804.00
Free Shipping
Learn More
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 map apply, see our full shipping policy for more details.
Factory-Direct
Rheem 160,000 BTU Tankless Water Heater Propane Concentric Vent
Learn More About A.O. Smith ATI-540HX3-Pacw-sale-badge
A.O. Smith X3 - 6.2 GPM at 60° F Rise - 0.93 UEF - Propane Tankless Water Heater - Indoor
5.0 out of 5 stars 5.0 out of 5 stars
(1)
EnergyStar Condensing Water Heater. Ultra-Low NOx (14 ng/J or 20 ppm). Ratings: 9.5 GPM at 40° F Rise, 7.5 GPM at 50° F Rise, 6.2 GPM at 60° F Rise, 5.2 GPM at 70° F Rise. 199k Max BTU/h.
Item#: 123211
Model#: ATI-540HX3-P
Brand: A.O. Smith
$1,558.00
Free Shipping
Learn More
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 map apply, see our full shipping policy for more details.
Factory-Direct
A.O. Smith X3 - 6.2 GPM at 60° F Rise - 0.93 UEF - Propane Tankless Water Heater - Indoor
Learn More About Noritz NRC711DV-LPacw-sale-badge
Noritz 157,000 BTU Propane Direct Vent Tankless Water Heater
Write A Review
EnergyStar Condensing Water Heater. Ultra Low NOx Emissions (SCAQMD Rule 1146.2 Compliant). Ratings: 7.1 GPM at 40° F Rise, 5.8 GPM at 50° F Rise, 4.9 GPM at 60° F Rise, 4.2 GPM at 70° F Rise. 148k Effective BTU/h.
Item#: 31854
Model#: NRC711DV-LP
Brand: Noritz
$1,295.62
Free Shipping
Learn More
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 map apply, see our full shipping policy for more details.
Factory-Direct
Noritz 157,000 BTU Propane Direct Vent Tankless Water Heater
Learn More About Noritz NRC711DV-NGacw-sale-badge
Noritz 157,000 BTU Natural Gas Direct Vent Tankless Water Heater
Write A Review
EnergyStar Condensing Water Heater. Ultra Low NOx Emissions (SCAQMD Rule 1146.2 Compliant). Ratings: 7.1 GPM at 40° F Rise, 5.8 GPM at 50° F Rise, 4.9 GPM at 60° F Rise, 4.2 GPM at 70° F Rise. 148k Effective BTU/h.
Item#: 31856
Model#: NRC711DV-NG
Brand: Noritz
$1,295.62
Free Shipping
Learn More
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 map apply, see our full shipping policy for more details.
In-Stock
Noritz 157,000 BTU Natural Gas Direct Vent Tankless Water Heater
Learn More About Noritz NRC98-DV-LPacw-sale-badge
Noritz 180,000 BTU Propane Direct Vent Tankless Water Heater
Write A Review
EnergyStar Condensing Water Heater. Ultra Low NOx Emissions (SCAQMD Rule 1146.2 Compliant). Ratings: 8.4 GPM at 40° F Rise, 6.7 GPM at 50° F Rise, 5.6 GPM at 60° F Rise, 4.8 GPM at 70° F Rise. 166k Effective BTU/h.
Item#: 31858
Model#: NRC98-DV-LP
Brand: Noritz
$1,549.88
Free Shipping
Learn More
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 map apply, see our full shipping policy for more details.
Factory-Direct
Noritz 180,000 BTU Propane Direct Vent Tankless Water Heater
Learn More About A.O. Smith ATI-340H-Nacw-sale-badge
A.O. Smith 5.7 GPM 0.95 UEF NG Tankless Water Heater DV
Write A Review
EnergyStar Condensing Water Heater. Low NOx Emissions (< 40 ng/J or 55 PPM). Ratings: 8.0 GPM at 40° F Rise, 6.8 GPM at 50° F Rise, 5.7 GPM at 60° F Rise, 4.8 GPM at 70° F Rise. 171k Effective BTU/h.
Item#: 61570
Model#: ATI-340H-N
Brand: A.O. Smith
$1,142.00
Free Shipping
Learn More
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 map apply, see our full shipping policy for more details.
In-Stock
A.O. Smith 5.7 GPM 0.95 UEF NG Tankless Water Heater DV
Learn More About A.O. Smith ATI-540H-Nacw-sale-badge
A.O. Smith 6.3 GPM 0.93 UEF Indoor NG Tankless Water Heater DV
Write A Review
EnergyStar Condensing Water Heater. Low NOx Emissions (< 40 ng/J or 55 PPM). Ratings: 9.5 GPM at 40° F Rise, 7.5 GPM at 50° F Rise, 6.3 GPM at 60° F Rise, 5.4 GPM at 70° F Rise. 189k Effective BTU/h.
Item#: 61571
Model#: ATI-540H-N
Brand: A.O. Smith
$1,269.00
Free Shipping
Learn More
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 map apply, see our full shipping policy for more details.
In-Stock
A.O. Smith 6.3 GPM 0.93 UEF Indoor NG Tankless Water Heater DV
Learn More About A.O. Smith ATI-240H-Nacw-sale-badge
A.O. Smith 5 GPM 0.94 UEF NG Tankless Water Heater DV
Write A Review
Item#: 61572
Model#: ATI-240H-N
Brand: A.O. Smith
$1,022.00
Free Shipping
Learn More
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 map apply, see our full shipping policy for more details.
Factory-Direct
A.O. Smith 5 GPM 0.94 UEF NG Tankless Water Heater DV
Learn More About A.O. Smith ATI-140H-Nacw-sale-badge
A.O. Smith 3.8 GPM 0.90 UEF NG Tankless Water Heater DV
Write A Review
EnergyStar Condensing Water Heater. Low NOx Emissions (< 40 ng/J or 55 PPM). Ratings: 5.4 GPM at 40° F Rise, 4.4 GPM at 50° F Rise, 3.8 GPM at 60° F Rise, 3.2 GPM at 70° F Rise. 112k Effective BTU/h.
Item#: 61575
Model#: ATI-140H-N
Brand: A.O. Smith
$845.00
Free Shipping
Learn More
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 map apply, see our full shipping policy for more details.
Factory-Direct
A.O. Smith 3.8 GPM 0.90 UEF NG Tankless Water Heater DV
Learn More About A.O. Smith ATI-110U-Nacw-sale-badge
A.O. Smith 3.9 GPM at 60F 0.81 UEF NG Tankless Water Heater DV
Write A Review
EnergyStar Water Heater. Ultra Low NOx Emissions (SCAQMD Rule 1146.2 Compliant). Ratings: 5.8 GPM at 40
Item#: 69978
Model#: ATI-110U-N
Brand: A.O. Smith
$720.00
Free Shipping
Learn More
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 map apply, see our full shipping policy for more details.
Factory-Direct
A.O. Smith 3.9 GPM at 60F 0.81 UEF NG Tankless Water Heater DV
Learn More About A.O. Smith ATI-240H-Pacw-sale-badge
A.O. Smith 5 GPM 0.94 UEF LP Tankless Water Heater DV
Write A Review
EnergyStar Condensing Water Heater. Low NOx Emissions (< 40 ng/J or 55 PPM). Ratings: 6.7 GPM at 40° F Rise, 6.1 GPM at 50° F Rise, 5.0 GPM at 60° F Rise, 4.3 GPM at 70° F Rise. 152k Effective BTU/h.
Item#: 69980
Model#: ATI-240H-P
Brand: A.O. Smith
$1,022.00
Free Shipping
Learn More
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 map apply, see our full shipping policy for more details.
Factory-Direct
A.O. Smith 5 GPM 0.94 UEF LP Tankless Water Heater DV
Learn More About A.O. Smith ATI-340H-Pacw-sale-badge
A.O. Smith 5.7 GPM 0.95 UEF LP Tankless Water Heater DV
Write A Review
EnergyStar Condensing Water Heater. Low NOx Emissions (< 40 ng/J or 55 PPM). Ratings: 8.0 GPM at 40° F Rise, 6.8 GPM at 50° F Rise, 5.7 GPM at 60° F Rise, 4.8 GPM at 70° F Rise. 171k Effective BTU/h.
Item#: 69983
Model#: ATI-340H-P
Brand: A.O. Smith
$1,142.00
Free Shipping
Learn More
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 map apply, see our full shipping policy for more details.
Factory-Direct
A.O. Smith 5.7 GPM 0.95 UEF LP Tankless Water Heater DV
Learn More About A.O. Smith ATI-510U-Nacw-sale-badge
A.O. Smith 5.5 GPM at 60F 0.82 EF NG Tankless Water Heater DV
Write A Review
EnergyStar Water Heater. Ultra Low NOx Emissions (SCAQMD Rule 1146.2 Compliant). Ratings: 8.3 GPM at 40
Item#: 69986
Model#: ATI-510U-N
Brand: A.O. Smith
$1,059.00
Free Shipping
Learn More
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 map apply, see our full shipping policy for more details.
Factory-Direct
A.O. Smith 5.5 GPM at 60F 0.82 EF NG Tankless Water Heater DV
Learn More About Eemax ED020480T2Tacw-sale-badge
Eemax ED020 - 2.5 GPM at 60° F Rise - 480V / 3 Ph Tankless Point of Use Water Heater
Write A Review
Ratings: 3.5 GPM at 40
Item#: 70334
Model#: ED020480T2T
Brand: Eemax
$1,686.84
Free Shipping
Learn More
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 map apply, see our full shipping policy for more details.
Only 1 In-Stock
Eemax ED020 - 2.5 GPM at 60° F Rise - 480V / 3 Ph Tankless Point of Use Water Heater
Learn More About Eemax HA013240acw-sale-badge
Eemax Electric Tankless Water Heater 13 kW 240V
Write A Review
Ratings: 2.2 GPM at 40° F Rise, 1.8 GPM at 50° F Rise, 1.5 GPM at 60° F Rise, 1.3 GPM at 70° F Rise.
Item#: 70354
Model#: HA013240
Brand: Eemax
$364.90
Free Shipping
Learn More
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 map apply, see our full shipping policy for more details.
In-Stock
Eemax Electric Tankless Water Heater 13 kW 240V
Learn More About Eemax HA018240acw-sale-badge
Eemax Electric Tankless Water Heater 18 kW 240V
Write A Review
Ratings: 3.0 GPM at 40° F Rise, 2.5 GPM at 50° F Rise, 2.0 GPM at 60° F Rise, 1.8 GPM at 70° F Rise.
Item#: 70355
Model#: HA018240
Brand: Eemax
$449.00
Free Shipping
Learn More
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 map apply, see our full shipping policy for more details.
In-Stock
Eemax Electric Tankless Water Heater 18 kW 240V