Gas Tankless Water Heaters

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Gas tankless water heaters can use either natural gas or liquid propane for their fuel source and be installed either indoors or outdoors. If you are looking for this type of versatility, shop our wide selection of gas tankless water heaters from the top brands and find the perfect match today.

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Takagi (26)

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To create heat, some form of fuel is required. Fuel Type specifies what the product uses as an input to create heat.

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Maximum Input Capacity (BTU)

The Maximum Input Capacity describes how quickly the appliance will use fuel when delivering it's maximum capacity. The units may change depending on the fuel being used.

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Uniform Energy Factor (UEF) is a measurement of water heater energy efficiency. The higher the energy factor, the more efficient the water heater.

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Vent Type

Products that use combustion (burning) of fuel to create heat also create potentially dangerous gasses that need to be exhausted (AKA "Vented"). Depending on the product, venting can be done via a chimney, through a side wall, or use a second vent to provide fresh air to the appliance.

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Condensing appliances use leftover thermal energy from combustion gases to heat water in a secondary heat exchanger, resulting in higher efficiency and lower exhaust temperature.

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Ultra Low NOx Emissions

NOx is a byproduct of the combustion process, and it's output is regulated in some jurisdictions. Many regulators mirror SCAQMD rules, which regulate air quality for some parts of Southern California. Ultra Low NOx appliances emit less than 10-14 ng/J (nanogram per Joule) of NOx. Learn More

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Flow Rate at 40F Temperature Rise (GPM)

Flow rate measures how much hot water your heater can deliver. Click Learn More to determine the appropriate temperature rise to use based on your location. Learn More

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Flow rate measures how much hot water your heater can deliver. Click Learn More to determine the appropriate temperature rise to use based on your location. Learn More

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Flow rate measures how much hot water your heater can deliver. Click Learn More to determine the appropriate temperature rise to use based on your location. Learn More

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Flow Rate at 70F Temperature Rise (GPM)

Flow rate measures how much hot water your heater can deliver. Click Learn More to determine the appropriate temperature rise to use based on your location. Learn More

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Takagi T-H3 - 6.3 GPM at 60° F Rise - 0.93 UEF - Gas Tankless Water Heater - Direct Vent

Model: T-H3-DV-NG

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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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Takagi T-H3M - 3.8 GPM at 60° F Rise - 0.90 UEF - Gas Tankless Water Heater - Direct Vent

Model: T-H3M-DV-NG

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Noritz NR98 - 5.6 GPM at 60° F Rise - 0.84 UEF - Gas Tankless Water Heater - Outdoor

Model: NR98-OD-NG

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Learn More About Rheem Tankless RTG-84XLN

Rheem RTG - 5.1 GPM at 60° F Rise - 0.81 UEF - Gas Tankless Water Heater - Outdoor

Model: RTG-84XLN-1

EnergyStar Non-Condensing Water Heater. Ultra Low NOx Emissions (SCAQMD rule 1146.2 Compliant). Ratings: 7.8 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.

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Learn More About Rheem Tankless RTG-95XLN

Rheem RTG - 5.5 GPM at 60° F Rise - 0.81 UEF - Gas Tankless Water Heater - Outdoor

Model: RTG-95XLN-1

EnergyStar Non-Condensing Water Heater. Ultra Low NOx Emissions (SCAQMD rule 1146.2 Compliant). Ratings: 8.5 GPM at 40° F Rise, 6.6 GPM at 50° F Rise, 5.5 GPM at 60° F Rise, 4.7 GPM at 70° F Rise.

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Learn More About Rheem Tankless RTGH-95DVLN

Rheem RTGH - 6.4 GPM at 60° F Rise - 0.93 UEF - Gas Tankless Water Heater - Direct Vent

Model: RTGH-95DVLN-2

EnergyStar Condensing Water Heater. Ultra Low NOx Emissions (SCAQMD rule 1146.2 Compliant). Ratings: 9.5 GPM at 40° F Rise, 7.7 GPM at 50° F Rise, 6.4 GPM at 60° F Rise, 5.5 GPM at 70° F Rise.

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Takagi TK-110U - 3.9 GPM at 60° F Rise - 0.81 UEF - Gas Tankless Water Heater - Direct Vent

Model: TK-110U-I-NG

Ultra Low NOx Emissions (SCAQMD Rule 1146.2 Compliant). Ratings: 5.8 GPM at 40° F Rise, 4.5 GPM at 50° F Rise, 3.9 GPM at 60° F Rise, 3.3 GPM at 70° F Rise. 115k Effective BTU/h.

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Rinnai Value Series - V65 - 4.1 GPM at 60° F Rise - 0.81 UEF - Propane Tankless Water Heater - Outdoor

Model: V65EP

EnergyStar Water Heater. Ultra Low NOx Emissions (SCAQMD Rule 1146.2 Compliant). Ratings: 6.2 GPM at 40

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Learn More About Rheem Tankless RTG-84DVLN

Rheem RTG - 5.1 GPM at 60° F Rise - 0.82 UEF - Gas Tankless Water Heater - Concentric Vent

Model: RTG-84DVLN-1

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Takagi T-H3M - 3.8 GPM at 60° F Rise - 0.90 UEF - Propane Tankless Water Heater - Direct Vent

Model: T-H3M-DV-LP

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Learn More About Rheem Tankless RTGH-95DVLP

Rheem RTGH - 6.4 GPM at 60° F Rise - 0.93 UEF - Propane Tankless Water Heater - Direct Vent

Model: RTGH-95DVLP-2

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Takagi T-H3 - 6.3 GPM at 60° F Rise - 0.93 UEF - Propane Tankless Water Heater - Direct Vent

Model: T-H3-DV-LP

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Noritz NR98 - 5.6 GPM at 60° F Rise - 0.88 UEF - Propane Tankless Water Heater - Outdoor

Model: NR98-OD-LP

EnergyStar Non-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. 199.9k Effective BTU/h.

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Takagi TK-110U - 3.9 GPM at 60° F Rise - 0.81 UEF - Gas Tankless Water Heater - Outdoor

Model: TK-110U-E-NG

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Noritz NR98 - 5.6 GPM at 60° F Rise - 0.83 UEF - Gas Tankless Water Heater - Power Vent

Model: NR98-SV-NG

EnergyStar Non-Condensing Water Heater. Ultra Low Nox Emissions (SCAQMD Rule 1146.2 Compliant). Ratings: 8.4 GPM at 40

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Learn More About Rheem Tankless RTGH-84DVLN

Rheem RTGH - 5.0 GPM at 60° F Rise - 0.93 UEF - Gas Tankless Water Heater - Direct Vent

Model: RTGH-84DVLN-2

EnergyStar Condensing Water Heater. Ultra Low NOx Emissions (SCAQMD rule 1146.2 Compliant). Ratings: 7.5 GPM at 40° F Rise, 6 GPM at 50° F Rise, 5 GPM at 60° F Rise, 4.3 GPM at 70° F Rise.

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Learn More About Rheem Tankless RTGH-84DVLP

Rheem RTGH - 5.0 GPM at 60° F Rise - 0.93 UEF - Propane Tankless Water Heater - Direct Vent

Model: RTGH-84DVLP-2

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Rinnai Value Series - V94 - 5.5 GPM at 60° F Rise - 0.81 UEF - Propane Tankless Water Heater - Concentric Vent

Model: V94IP

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Rinnai Value Series - V53 - 3.3 GPM at 60° F Rise - 0.81 UEF - Gas Tankless Water Heater - Outdoor

Model: V53DEN

EnergyStar Water Heater. Low NOx Emissions (< 40 ng/J or 55 PPM). Ratings: 4.9 GPM at 40

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Takagi TK-310U - 5.3 GPM at 60° F Rise - 0.82 UEF - Gas Tankless Water Heater - Direct Vent

Model: TK-310U-I-NG

Ultra Low NOx Emissions (SCAQMD Rule 1146.2 Compliant). Ratings: 7.9 GPM at 40° F Rise, 6.2 GPM at 50° F Rise, 5.3 GPM at 60° F Rise, 4.5 GPM at 70° F Rise. 156k Effective BTU/h.

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Learn More About Rheem Tankless RTG-70XLN

Rheem RTG - 4.5 GPM at 60° F Rise - 0.81 UEF - Gas Tankless Water Heater - Outdoor

Model: RTG-70XLN-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.

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Takagi TK-310U - 5.3 GPM at 60° F Rise - 0.82 UEF - Gas Tankless Water Heater - Outdoor

Model: TK-310U-E-NG

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Takagi T-H3M - 3.8 GPM at 60° F Rise - 0.91 UEF - Propane Tankless Water Heater - Outdoor

Model: T-H3M-OS-LP

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.

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Noritz NRC111 - 6.2 GPM at 60° F Rise - 0.90 UEF - Gas Tankless Water Heater - Direct Vent

Model: NRC111-DV-NG

EnergyStar Condensing Water Heater. Ultra Low NOx Emissions (SCAQMD Rule 1146.2 Compliant). Ratings: 9.3 GPM at 40° F Rise, 7.4 GPM at 50° F Rise, 6.2 GPM at 60° F Rise, 5.3 GPM at 70° F Rise. 184k Effective BTU/h.

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