Read my personal review about each model

Rinnai – heaters are engineered with smart, advanced technology. Ultra, Luxury and Value are the three important series that the brand offers.

Rinnai V65IN 6.6 GPM Indoor Low NOx Tankless Natural Gas Water Heater

Rinnai V65EN 6.6 GPM Outdoor Low NOx Tankless Natural Gas

Rinnai RL75iN Natural Gas Tankless Water Heater, 7.5 Gallons Per Minute

Rinnai RL75eN Natural Gas 7.5 Gallons Per Minute

Rinnai V75LP 7.5 GPM Indoor Low Nox Tankless Propane

Rinnai RL75eP Propane Outdoor, 7.5 Gallons Per Minute

Rinnai RL94iN Natural Gas Tankless Water Heater, 9.4 Gallons Per Minute

Rinnai RL94eN Natural Gas Tankless Water Heater, 9.4 Gallons Per Minute

Rinnai RL94iP Propane 9.4 Gallons Per Minute

Rinnai RL94eP Propane Outside, 9.4 GPM

Rinnai RU98IN 9.8 GPM Indoor Ultra-NOx Condensing Tankless Natural Gas Water Heater

Rinnai RUC98iN Ultra Series Natural Gas 9.8GPM

Rinnai R98LSE Natural Gas Outdoor 9.8 GPM

Rinnai RU98EN Outdoor Ultra-NOx Condensing Natural Gas 9.8GPM

Rinnai RU98IP 9.8 GPM Propane Indoor Ultra-NOx Condensing

Takagi – The brand name is popular for its series of natural gas water heaters. It offers a wide range of commercial as well as residential natural gas heaters. T-H3S-DV/OS, T-D2U and T-D2-IN/OS are some of the most popular models.

Takagi T-KJr2-IN-NG Indoor Tankless Water Heater, Natural Gas 6.6 GPM

Takagi T-KJr2-OS-NG Outdoor Tankless Water Heater 6.6 GPM

Takagi T-KJr2-IN-LP Indoor 6.6 GPM Propane

Takagi T-K4-IN-NG 8 GPM Indoor Tankless Water Heater, Natural Gas

Takagi – T-K4-OS NG Natural Gas, Outdoor 8 GPM

Takagi T-D2-IN-NG Indoor Tankless Water Heater 10 GPM, Natural Gas

Takagi T-D2-IN-LP Indoor Tankless Water Heater, Propane 10 GPM

Takagi T-H3-DV-N Condensing High Efficiency Natural Gas Indoor 10GPM

Ecosmart – This brand comes with a range of electric heaters that could be used for residential purposes. Ecosmart is especially known for its eco-friendly technology. Its line of water heater models includes POU 3.5, POU 6, ECO 8, ECO 11, ECO 18, ECO 24 and ECO 27.

Ecosmart ECO 18 Electric, 18 KW at 240 Volts with Patented Self Modulating Technology

Ecosmart ECO 24 24 KW at 240-Volt Electric with Patented Self Modulating Technology

Ecosmart ECO 27 Electric, 27 KW at 240 Volts with Patented Self Modulating Technology

ECO Smart ECO 36 36KW 240V Electric  6 GPM with Patented Self Modulating Technology

Ecosmart POU 3.5 Point of Use Electric, 3.5KW@110-Volt

EcoSmart ECO 11 1.5GPM Electric 13KW at 240 Volts with Patented Self Modulating Technology

Eccotemp – is a prominent propane heater brand that manufactures best outdoor water showers. Eccotemp L-5 and Eccotemp L-10 are the two popular models of water heaters that are powered by two “D” cell batteries. It is best to be used on campsites and mobile homes.

Eccotemp L5 Portable and Outdoor Shower

Eccotemp L10 High Capacity Outdoor 2.65GPM

Eccotemp Deluxe Tankless Water Heater 2.65GPM

Eccotemp FVI-12-LP High Capacity Propane 3.4GPM

Eccotemp FVI-12-NG 4.8GPM High Capacity Gas

EZ – The brand manufactures high quality, eco-friendly tankless that works on natural gas and propane. The direct vent tankless water heaters include EZ Deluxe – Indoor and EZ Supreme – Indoor and the portable water heater includes the models EZ 101 and EZ 202.

EZ 101 – Propane LPG – Portable – Battery Powered Ignition

Bosch – is a pioneer in manufacturing tankless gas-powered heaters. They have got the best indoor and outdoor heating system. Both condensing and non condensing systems are available.

Bosch AE125 PowerStar 4 GPM Indoor Electric

Bosch GL4S Ariston 4-GPM Point-of-Use Indoor Electric Mini-Tankles Water Heater

Bosch Therm 520 HN NG (Natural Gas) Whole-House

Bosch 520 PN NG Therm Natural Gas 5.2GPM

Bosch AE-12 PowerStar 2.0 GPM Point-Of-Use Indoor

Bosch AE-7.2 PowerStar 1.2 GPM Point-Of-Use Indoor Tankless Electric Water Heater

Bosch 330 PN LP Therm Tankless Water Heater 3.3 GPM Propane

Bosch 940 ES NG Natural Gas 9.4GPM

Bosch C 1050 ES LP Greentherm C 150 ES LP 10.5GPM Propane

Bosch C 1050 ES NG Greentherm C 150 ES NG Natural Gas 10.5GPM

Stiebel Eltron – is popular for high quality and well engineered water heaters. The heaters are designed to be safe, energy efficient and user-friendly. It manufactures some of the finest Single Point-of-use, Multiple Point-of-use and Whole house water heaters.

Stiebel Eltron Tempra 15B 240-Volt 14.4 kW Electric

Stiebel Eltron Tempra 20 Plus Electric Whole House, 240 V, 19.2 kW

Stiebel Eltron Tempra 24 Plus Electric Tankless Whole House Water Heater, 240 V, 24 kW

Stiebel Eltron Tempra 29 Plus Electric Tankless Whole House Water Heater, 240 V, 28.8 kW

Stiebel Eltron DHC-E12 E Series 208/240 Volt 9000/12000 Watt Electric Tankless Water Heater

Stiebel Eltron DHC 3-1 0.5GPM Electric Tankless Water Heater, 120V

Eemax – has got the largest collection of electric heater types for commercial and residential purposes. The Eemax line includes Flow Controlled, Thermostatic, Single Point, Mini-Tank heaters, Series Two, Series Three and Three Phase.

Eemax EMT4 4 Gallon Capacity Electric Mini-Tank

Eemax SP35 Tankless Water Heater

Eemax EX190TC 3-Gallon Series Two Whole House Electric Tankless Water Heater

Eemax SP2412 Single Point 2.4 kW 120-Volt Electric 0.5GPM

Eemax EX280T2T Series Three, Whole House Electric Tankless Water Heater

Noritz – Both commercial and residential models are available. Its residential line includes Eco Tough, Pro Tough and Value Solutions. The commercial models include NCC1991, NC380, NC250 and NC199.

Noritz NR71-SV NG Indoor/Outdoor Tankless Natural Gas Water Heater

Noritz NRC1111-DVNG Residential Condensing Tankless Water Heater, Natural Gas Review

Rain Man Tankless – Is consistently up there with tankless water heaters. They are designed well and made at a very good standard with very good features for the low price of their units.  Easy to use.

Rain Man L6 RV Camping Hunting Portable Tankless Water Heater LPG 2.0 GPM

Navien – An extremely popular eco friendly tankless water heater brand. Known for its quality.

Navien NPE-180A Premium Condensing Propane 8.4GPM

Navien NPE -210A Premium Condensing Gas 10.1 GPM

Navien NPE -210S Premium Condensing Gas 10.1GPM

Navien NPE -240A Premium Condensing Gas 11.2GPM

Navien NPE -240s Premium Condensing Gas 11.9GPM