Large Tankless Water Heaters

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Ranking Criteria: The most efficient water heaters, ranked by Energy Factor, based on likely annual energy consumption. ENERGY STAR also uses this calculation.
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#2
Eternal GU195

Eternal
GU195(S,M)

This is a large gas-condensing tankless water heater.

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#3
Navien NP210A

Navien America
NP-210

This is a large gas-condensing tankless water heater.

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#3
Navien NR-240

Navien America
Multiple Models

This is a large gas-condensing tankless water heater.

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#4
Navien NP210A

Navien America
NP-210A, NR-210A

This is a large gas-condensing tankless water heater.

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#5
Rinnai-RC98HPe

Rinnai
RC98HPe, RC98HPi

This is a large gas-condensing tankless water heater.

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#6
Bosch C950es

Bosch Therm
C 950 ES

This is a large gas-condensing tankless water heater.

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#6
Quietside odw-180A

Quietside
ODW-180A

This is a large gas-condensing tankless water heater.

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#6
Noritz NRC-98DV_2

Noritz
NRC98-DV

This is a large gas-condensing tankless water heater.

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#6
Quietside odw-180A

Quietside
ODW-199A

This is a large gas-condensing tankless water heater.

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As low as $1400.95 from 1 retailers

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#4
Rheem - RTGH95DVN

Multiple Brands
Multiple Models

This is a large gas-condensing tankless water heater.

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#1
Navien America NR-210

Navien America
NR-210

This is a large gas-condensing tankless water heater.

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#1
Navien America NR-210

Navien America
NR-240

This is a large gas-condensing tankless water heater.

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Price It

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As low as $1487.50 from 1 retailers

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#6
Noritz-0842MC-DV

Noritz
N-0842MC-DV, NRC111-DV

This is a large gas-condensing tankless water heater.

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Category Last Modified: September 15, 2011

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