Top 9 Condensing Tankless Water Heater Natural Gas Indoor – Water Heaters

As an Amazon Associate I earn from qualifying purchases.

1. Noritz

#ad

Noritz NRC66DVNG Indoor Condensing Direct Tankless Hot Water Heater, 6.6 GPM, Natural Gas

#ad
Noritz #ad - High Efficiency. Remote thermostat & 6' power cord included. Can be vented with Schedule 40 PVC Pipe and Fitting. Low Nox. Endless hot water.
BrandNoritz #ad
ManufacturerNoritz #ad
Height23.6 Inches
Length6.7 Inches
Weight11.42 Pounds
Width13.8 Inches
Part NumberNRC661-DV-NG
ModelNRC661-DV-NG
Warranty12 Year Heat Exchanger, 5 Year Parts, 1 Year Labor

2. TAKAGI

#ad

Natural Gas, Takagi T-H3M-DV-N Condensing Direct Vent Tankless Water Heater

#ad
TAKAGI #ad - Manufactured in Japan. Perfect for light residential and radiant heating applications. Inlet, outlet thermistors for constant temperature monitoring.
BrandTAKAGI #ad
ManufacturerTakagi #ad
Height29.5 Inches
Length17.75 Inches
Weight44 Pounds
Width13.12 Inches
Part NumberT-H3M-DV-N
ModelTH3MDVNG

3. EZ Tankless

#ad

Digital Display, Whole Home, EZ Ultra HE Natural Gas Indoor Condensing Tankless Water Heater

#ad
EZ Tankless #ad - Condensing technology - the EZ Ultra HE uses exhaust gas to preheat incoming water for added efficiency. Back-draft prevention device and stainless steel horizontal vent pipe are included. Capacity up to 3. 4 gpm @ 45f rise In Ambient Temperature. This heater can be vented horizontally or vertically using 2" Solid Core Schedule 40 PVC/CPVC. Free shipping.
BrandEZ Tankless #ad
ManufacturerEZ Tankless #ad
Height6.5 Inches
Length27 Inches
Width14.5 Inches

4. Rheem

#ad

Rheem RTGH-90DVLN Prestige Indoor Condensing Ultra Low NOx Natural Gas Tankless Water Heater, 9.0 GPM,

#ad
Rheem #ad - Digital remote control and 10 ft. Up to. 94 ef with stainless steel condensing heat exchanger. Of thermostat wire included. 11, 000 - 180, 000 btu/h. Manual gas isolation valve included. Indoor direct vent.
BrandRheem #ad
ManufacturerRheem #ad
Height27.5 Inches
Length18.5 Inches
Weight82 Pounds
Width9.75 Inches
Part NumberRTGH-90DVLN
ModelRTGH-90DVLN

5. TAKAGI

#ad

Takagi T-H3S-DV-N Condensing High Efficiency Natural Gas Indoor Tankless Water Heater, 8-Gallon Per Minute

#ad
TAKAGI #ad - Computerized safety features, No pilot light to have to worry about. Endless hot water, Compact, on-demand usage, Space saving, Energy conservation. Dimension:22. 5"h x 17. 75"w x 1075"d. Satisfies the 2012 scaqmd rule 1146. 2 for ultra-Low NOx Emissions.
BrandTAKAGI #ad
ManufacturerTakagi #ad
Height24.88 Inches
Length11.25 Inches
Width17.75 Inches
Part NumberFBA_T-H3S-DV-N
ModelT-H3S-DV-N

6. AO Smith

#ad

AO Smith ATI-340H-N 8 GPM Residential/Commercial Condensing Natural Gas Indoor Tankless Water Heater with 180000 Maximum BTU Input

#ad
AO Smith #ad - Ati-340h condensing natural Gas Tankless Water Heater. 8 gpm. Altitude certification: 10100 Feet Above Sea Level. Max btu input: 180000 Height: 23-5/8".
BrandAO Smith #ad
ManufacturerAo Smith #ad
Weight58 Pounds
Part NumberATI-340H-N

7. Rinnai

#ad

Rinnai RUR98iN Ultra Series Condensing Indoor Natural Gas Tankless Water Heater, 9.8 Max

#ad
Rinnai #ad - Innovative technology provides an endless supply of hot water. Maximum output, minimum space. Flow rate @ 70°50°f Temp Rise ranges between 4.

2 5. 9 and 5. 5 7. 7. Offers both concentric and pvc, providing more venting options right out of the box. Rinnai's condensing technology features dual heat exchangers to provide maximum efficiency, up to. 96 energy factor; Wifi Capable. About the size of a small suitcase. Recirculation capability, with or without a dedicated recirculation line Innovative technology provides an endless supply of hot water. Installation type-​indoor, tankless Rack System TRS/TRW Compatible, 1/2" Gas Line Compatible.
BrandRinnai #ad
ManufacturerRinnai #ad
Height26 Inches
Length12.5 Inches
Weight73 Pounds
Width10 Inches
Part NumberRUR98iN
ModelRUR98iN
WarrantyResidential: Limited 12-year on heat exchanger, 5-year on parts, 1-year on labor (5-year optional on labor). Commercial: Limited 5-year on heat exchanger, 5-year on parts, 1-year on labor (2-year optional on labor).

8. TAKAGI

#ad

6.6-Gallon Per Minute, Takagi T-H3J-DV-N Condensing High Efficiency Natural Gas Indoor Tankless Water Heater

#ad
TAKAGI #ad - Computerized safety features, No pilot light to have to worry about. Satisfies the 2012 scaqmd rule 1146. 2 for ultra-Low NOx Emissions. Endless hot water, On-demand usage, Space saving, compact, Energy conservation.
BrandTAKAGI #ad
ManufacturerTakagi #ad
Height24.88 Inches
Length11.25 Inches
Weight58 Pounds
Width17.75 Inches
Part NumberT-H3J-DV-N
ModelT-H3J-DV-N

9. Rheem

#ad

Rheem RTGH-84DVLN Indoor Direct Vent Natural Gas Condensing Tankless Water Heater Low Nox

#ad
Rheem #ad - Built-in electric blower Supplied with a 120 volt power cord. Environmentally friendly Low Knox burner meets SCAQMD rule 1146 requirements. Freeze protection to -30 Degree F.
BrandRheem #ad
ManufacturerRheem #ad
Height27.5 Inches
Length9.75 Inches
Width18.5 Inches
Part NumberRTGH-84DVLN
ModelRTGH-84DVLN