Expert’s Top 10 Picks & Best Gas Hot Water Heater, Picks For 2023

The Gas Hot Water Heater is a quintessential home appliance designed to provide you with a constant supply of hot water, instantly and without effort. Running on natural gas, this unit offers high energy efficiency, reducing your household bills. It features a tankless design, which not only saves space, but also ensures that you never run out of hot water. The system warms the water as it flows through it, minimizing waiting time and energy waste, unlike traditional tank heaters. Armed with advanced safety features, such as overheat protection and a safety shut-off switch, the gas hot water heater ensures risk-free operation. Its superior rust-resistant construction guarantees long-lasting durability. Quick to install and easy to use, this gas hot water heater offers a reliable and cost-effective solution to all your hot water needs.

# Image Product Rating Detail
1 TC-Home 18L Propane Gas Water Heater Tankless 4.8GPM [...] TC-Home 18L Propane Gas Water Heater […]

3.8

2 Tankless Water Heater, 3.17 GPM Instant Hot Natural [...] Tankless Water Heater, 3.17 GPM Instant […]

3.9

3 Portable Water Heater Propane Tankless - 6L 1.58GPM RV [...] Portable Water Heater Propane Tankless […]

3.9

4 Camplux Tankless Water Heater, 2.64 GPM On Demand [...] Camplux Tankless Water Heater, 2.64 GPM […]

3.9

5 FOGATTI Natural Gas Tankless Water Heater, Indoor 6.3 [...] FOGATTI Natural Gas Tankless Water […]

3.9

6 TCFUNDY 1.58 GPM Tankless Water Heater Propane Gas 6L, [...] TCFUNDY 1.58 GPM Tankless Water Heater […]

4

7 FOGATTI Natural Gas Tankless Water Heater, Indoor 4.0 [...] FOGATTI Natural Gas Tankless Water […]

4.3

8 Rinnai V53DeN Tankless Hot Water Heater, 5.3 GPM, [...] Rinnai V53DeN Tankless Hot Water […]

4.3

9 Mizudo Natural Gas Tankless Water Heater 3.6 GPM, [...] Mizudo Natural Gas Tankless Water […]

4.3

10 Natural Gas Tankless Water Heater, Outdoor [...] Natural Gas Tankless Water Heater, […]

4.6

The 10 Best Gas Hot Water Heater, 2023 Top Recommendations

1#. TC-Home 18L Propane Gas Water Heater Tankless 4.8GPM Instant 36KW LPG Hot Water Heater

Product image of TC-Home 18L Propane Gas Water Heater Tankless 4.8GPM Instant 36KW LPG Hot Water Heater
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Features

  • Capacity: 18L/min (4.8Gal), SIZE: 13.4″(L) x5″(W) x25.6″(H), 25 degrees warm water producing rate; Cover Material: Cold Rolled Sheet; Gas Type: LPG Liquid Petroleum Gas (PROPANE); Dimension : Picture 2, SIZE: 13.4″(L) x5″(W) x25.6″(H)
  • Thermal input: 36KW; Working temperature:-8-45℃; Temperature rise: 25℃; Thermal efficiency: ≥80.8%. Torque Range: 3-3.5 N.m
  • Minimum working water pressure: 0.025MPa; Gas pressure: 2800Pa; Vent Type:4.3″ Flue Duct;Gas pipe: G 1/2″; Water Inlet: G1/2”; Water Outlet: G1/2”
  • Automatic ignition system, Flame failure protection device; Water & gas combination unit ,Fitted with over heating and pressure safeguard; 20 min. off self-timer
  • Certification: ISO 9001:2000; Net weight: 8.5KG; Mains power not required; Electrical requirement: DC3V, Automatic electric ignition powered by two (2) size ‘D’ batteries (batteries not included; No electrical hook up; No standing pilot)

  • 2#. Tankless Water Heater, 3.17 GPM Instant Hot Natural Gas Water Heater with Constant Temperature, Indoor (Natural Gas)

    Product image of Tankless Water Heater, 3.17 GPM Instant Hot Natural Gas Water Heater with Constant Temperature, Indoor (Natural Gas)
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    Features

  • Note: Please download and read the installation manual and product manual carefully when purchasing the product to ensure that your installation environment is consistent with this product. When installing, please strictly follow the installation manual and installation instruction video, otherwise it may not work. If you have any questions about the product, please contact us by email. We have a professional technical support team.
  • 【Tankless Instant Hot Water Heater】No need to preheat before using the tankless water heater. As soon as you turn on the tap, the water flows with your desired temperature.
  • 【High Sensitive Touch Led Display】Comes with smart digital LED display high-definition large screen, freely adjustable the temperature between 30℃-65℃.
  • 【Multiple Security Protection】The natural gas water heater is upgraded with 12 protection methods to ensure your safety. Such as dry burning protection, over 65℃(149 °F) protection, leakage protection, etc.Note: In cold weather, if the water heater is not used for a long time, it is necessary to open the pressure relief valve to drain the residual water in the water heater to prevent the exchanger or water pipe from freezing and swelling.
  • 【Energy and Money Saving】The hot water heater adjusts power input based on flow rate and temp setting in real time. Summer/winter 2 modes to save up to 60% on your natural gas costs.
  • 【Quality Material】Made with brushed stainless steel material, the natural gas water heater has the function of high temperature resistance, corrosion resistance. Built-in oxygen-free copper water tank, long service time.Note: This product must be installed with a ventilation and smoke exhaust pipe for normal use.
  • NOTE: This product does not have a serial number. If you don’t know how to install a water heater at all, it is recommended not to buy it.

  • 3#. Portable Water Heater Propane Tankless – 6L 1.58GPM RV on demand Hot Gas Outdoor Digital Display Water Heater for Camping,Boat,Cabins

    Product image of Portable Water Heater Propane Tankless - 6L 1.58GPM RV on demand Hot Gas Outdoor Digital Display Water Heater for Camping,Boat,Cabins
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    Features

  • 【On Demand Hot Water】Maximum power output 42,000btu/hour, get instant endless hot water easily wherever you are. No need to preheat before using tankless water heater. As soon as you turn on the tap, the water flows with your desired temperature. Low water pressure start up, just need 2.5 PSI of water pressure. 1.58 gallons per minute of on-demand hot water. Fully adjustable heat and water flow.
  • 【CSA Approved Safety 】RUINOPAR Tankless Water Heater with CSA Approved Regulator, safe as per Canadian and US Standard.Automatically decrease water pressure between 2.5-145PSI. The anti-freezing drain plug can discharge the residual water to avoid freezing in cold areas or in case of long time no use. High water temperature protection over 167°F. Shut off gas supply automatically under unexpectable flameout.
  • 【Safety Protection】The safety of the propane water heater is also an important thing that everyone will value very much; Our products have more than 6 protection methods; The product has safety protection that measures such as overheating protection, antifreeze protection, flame-out protection, anti-dry protection, high water pressure protection and low water flow protection, which prevent the product from doing harm to users,providing a comfortable and safe bathing conditions, reliable product.
  • 【Lightweight Portable Design】Compact size and lightweight design for easily carry. It can bring a amazing hot shower for you when you are camping , to the beach, etc. Also you can wash your pets with this tankless water heater in outdoor. Using the handle of the gas water heater or the mounting bracket on the back to hang it. It only takes you a few minutes to install it.
  • 【Energy Saving】With automatic ignition and flameout modes, when you turn on the shower nozzle, the tankless water heater automatically ignites, and when you turn off the shower nozzle, the water heater automatically put out the flame; With this unique design, our heater can save 11.5% energy for you and ensure your safety at the same time.
  • ★【Important Tips】To avoid gas leakage caused by improper sealing of the water heater, DO NOT TWINE TEFLON TAPE between gas regulator and gas inlet pipe. The tankless water heater will “caught on fire “with improper operation. Always check gas leakage before operation.
  • ★【2-Year Quality Warranty】We provide the 24-month warranty for the gas water heater, replace a new set directly once it has any quality problems.If you encounter any product after-sales problems, you can always contact the RUINOPAR support team, we will give you a satisfactory solution within 24 hours,Professional team is always online.

  • 4#. Camplux Tankless Water Heater, 2.64 GPM On Demand Instant Hot Water Heater, Propane Tankless Water Heater Indoor, White

    Product image of Camplux Tankless Water Heater, 2.64 GPM On Demand Instant Hot Water Heater, Propane Tankless Water Heater Indoor, White
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    Features

  • 2.64 GPM Instant Hot Water -Camplux high capacity 2.64 GPM propane tankless water heater delivers 2.64 GPM on demand endless hot water ensures instant hot water for any small homes, cabins or apartments. On demand water heater only heats the water when you need it and no waiting for preheat.
  • 6-IN-1 Multiple Protection- Flame-out protection, anti-freezing protection (manual drainage needed), over-heating protection, air flow pressure switch protection to ensure the safety. Safe electronic ignition system, plugs into standard 120V electrical outlet with UL-listed cord.
  • Easy Installation -The propane water heater uses standard 1/2″ NPT water fitting and gas inlet. Comes with 2″ horizontal vent pipe,ensures efficient power ventilation. Minimum activation rate: 0.65 GPM; Maximum input rating: 68,000 BTU; Water connection location/size: Bottom/0.5-inch NPT. You will need a gas regulator ( Camplux model KR-106A )&1 pc 5/8″ NPT male to 1/2″ BSP female gas connector adapter if you want to hook this water heater up to a propane tank.
  • Compact Design,Energy saving -The compact size instant hot water heater saves more space than traditional tanks.Trendy and modern design with fahrenheit digital temperature display. Eco and Full gas switch for energy saving and get ideal hot water temperature.
  • Considerate Customer Service- Here at Camplux, customer service is everything ! We offer 24 shift hours customer service make the customer experience easy and fast through our live chat, phone support & our online helpdesk. Have a question? Give us a call at (844) 538-7475.

  • 5#. FOGATTI Natural Gas Tankless Water Heater, Indoor 6.3 GPM, 145,000 BTU White Instant Hot Water Heater, InstaGas Comfort 145 Series

    Product image of FOGATTI Natural Gas Tankless Water Heater, Indoor 6.3 GPM, 145,000 BTU White Instant Hot Water Heater, InstaGas Comfort 145 Series
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    Features

  • We recommend that all installations of units must be done by the local building and plumbing codes of the installation location and installation be done by a licensed professional.
  • The tankless design means you don’t have to wait 30 minutes for preheating and unlimited use of hot water.
  • 145,000 BTU high heating capacity and maximum 6.3 GPM. It is suitable for 2-3 outlet points, which can satisfy whole family. UEF over 0.81, the high energy conversion rate can effectively reduce energy loss.
  • Excellent quality CSA certified in the United States and Canada. Adopting the world’s most advanced technology, superior safety and durability.
  • Using built in forced exhaust fan at the bottom ensures stable combustion and eliminates the influence of external wind. Compact design for easy installation.
  • Fogatti provides 5 years warranty on the heat exchanger and 2 years warranty on other parts. The above-mentioned labor costs are extra from 31 days.

  • 6#. TCFUNDY 1.58 GPM Tankless Water Heater Propane Gas 6L, Instant Hot Water Heater, Portable Digital Display Gas Water Heater, with Shower Head

    Product image of TCFUNDY 1.58 GPM Tankless Water Heater Propane Gas 6L, Instant Hot Water Heater, Portable Digital Display Gas Water Heater, with Shower Head
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    Features

  • 【6L Tankless Water Heater】TCFUNDY Tankless water heater with compact design saves more space and energy efficient than traditional water heaters. Using at 3.63 – 116 PSI of water pressure, 1.58 gallons of hot water can be output per minute, the maximum temperature raise is 75℃/167℉. Applicable only propane gas (LPG).
  • 【Efficient & Energey Saving】High efficiency propane gas tankless water heater delivers 1.58 GPM of instant hot water, no more waiting for long time. The heater exchanger and main burner adopt mostly advanced energy-saving and combustion technology to decrease gas consumption and burning noise.
  • 【Safety of Use】The hot water heater has overheat protection, dry combustion protection, flame failure protection, low water flow protection, high water pressure protection, Manifold Auto Protection. In order to avoid freezing in cold weather or in case of long time no use, please drainout the remaining water after using.
  • 【Intelligent Control】Equipped with season control center, gas control center, water control center, can adjust different temperature and water quantity. Digital display is easier to check temperature. Automatic electric ignition powered by two size ‘D’ batteries (not included).
  • 【Lightweight, Compact & Portable Design】Portable water heater compact size and weight 11 lbs, easy setup outside. Size: 11.4″ x 4.9″ x 14.8″. Always check gas leakage before operation.To avoid gas leakage caused by improper sealing of the water heater, DO NOT TWINE TEFLON TAPE between gas regulator and gas inlet pipe.

  • 7#. FOGATTI Natural Gas Tankless Water Heater, Indoor 4.0 GPM, 90,000 BTU Instant Hot Water Heater, InstaGas Classic 90

    Product image of FOGATTI Natural Gas Tankless Water Heater, Indoor 4.0 GPM, 90,000 BTU Instant Hot Water Heater, InstaGas Classic 90
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    Features

  • 【Smaller size and better performance】It is only 1/4 the size of a 50 gallon tank water heater, yet it produces approximately 4.0 GPM of hot water through 90,000 BTU for both bathroom and kitchen hot water demand. The highly integrated components also provide greater safety from water pressure surges without the need to install an expansion tank.
  • 【Fast and endless supply of hot water】The heat exchanger quickly heats the water to a maximum of 140℉ in a short time, and the hot water is quickly piped through to the shower and tap. No need to wait for the water temperature to heat up slowly like a tank water heater. After that it continues to operate at approximately 4.0 GPM for 40 minutes, which is enough time to produce almost 160 gallons of hot water.
  • 【Stable and comfortable temperature】Benefiting from the calculation and control of the heating power 1000/s by the chip, the temperature difference of the water can be precisely controlled within ±2°F.
  • 【High compatibility and easy installation】Most tank water heaters have exhaust vent, water and gas pipe that can be universally used in tankless, requiring only a simple re-layout. If installing a tankless water heater in a new house, its compact size makes it easy to install. Of course, we recommend that all installations are carried out in accordance with local building and plumbing codes by licensed professionals.
  • 【Excellent quality and service】CSA certification in the USA and Canada. Superior safety and durability using the world’s most advanced technology. FOGATTI provide 5 years warranty on heat exchanger and 2 years warranty on other parts.

  • 8#. Rinnai V53DeN Tankless Hot Water Heater, 5.3 GPM, Natural Gas, Outdoor Installation

    Product image of Rinnai V53DeN Tankless Hot Water Heater, 5.3 GPM, Natural Gas, Outdoor Installation
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    Features

  • Endless Hot Water: Enjoy unlimited hot water flow throughout the house; compact, durable, and easy to install; professional installation recommended
  • Energy and Space Efficient: Space-saving design conserves energy as it heats only when necessary.
  • Optimal Water Pressure: High-performance up to 5.3 GPM hot water flow rate for a powerful, constant stream
  • Enhanced scale detection lessens possibility of serious, long-term damage to unit
  • Guaranteed to Last: 10-, 5-, and 1-year residential factory warranty for heat exchanger, labor, and parts, respectively

  • 9#. Mizudo Natural Gas Tankless Water Heater 3.6 GPM, 80,000 BTU Indoor Installation Instant Hot Water heater

    Product image of Mizudo Natural Gas Tankless Water Heater 3.6 GPM, 80,000 BTU Indoor Installation Instant Hot Water heater
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    Features

  • 【Instant Hot Water Heater】Tankless water heaters can provide endless hot water on demand for 2- 3 water points.
  • 【Comfortable Bathing Experience】3.6 GPM hot water flow, precise temperature control, no water temperature sandwich.
  • 【Premium design and Durable】Adopt oxygen-free copper water tank, reduce heat loss, high efficiency and durability.
  • 【Compact Design】Save over 50% of available space compared to tank water heater.
  • 【Quality Service】If you encounter product quality problems, you can contact us by phone, email and message, and we will provide service according to the warranty policy.

  • 10#. Natural Gas Tankless Water Heater, Outdoor Installation 5.1 GPM, 120,000 BTU White Instant Hot Water Heater, FOGATTI InstaGas Classic 120S Series

    Product image of Natural Gas Tankless Water Heater, Outdoor Installation 5.1 GPM, 120,000 BTU White Instant Hot Water Heater, FOGATTI InstaGas Classic 120S Series
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    Features

  • 【Outdoor installation to save space】The product is installed outdoors and does not occupy the living space. The bottom built-in forced DC fan eliminates the influence of external wind. So as to ensure the stability of combustion, achieve safety, energy saving and no pollution. We recommend that all installations are carried out in accordance with local building and plumbing codes by licensed professionals.
  • 【Endless water supply without preheating】The heat exchanger quickly heats the water to a maximum of 140°F, which is ready for use without waiting for hot water. It can run at approximately 5.1 GPM for 40 minutes, enough to produce almost 200 gallons of hot water. Make a multi-point water supply for the whole house to meet your family’s water needs.
  • 【Precise temperature control and stable temperature】Equipped with a wire controller cord length of 164ft, allowing you to control the water temperature indoors. The burner can be burnt in sections to meet the water temperature demand in the four seasons. Benefiting from the calculation and control of the heating power 1000/s by the chip, the temperature difference of the water can be precisely controlled within ±2°F.
  • 【Compact design for easy installation】The tankless design is 1/4 the size of a 50 gallon tank water heater, making it easy to install. The highly integrated components also provide greater safety from water pressure surges without the need to install an expansion tank.
  • 【Excellent quality and service】CSA certification in the USA and Canada. Superior safety and durability using the world’s most advanced technology. FOGATTI provides 5 years warranty on the heat exchanger and 2 years warranty on other parts.

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