10 Best Gas Water Heaters in 2021 – Water Heater Reviews
Our winners of the Best Gas Water Heaters in 2021 are:
BEST OVERALL
Marey GA5PORT Portable Propane Gas Tankless Water Heater

- Tankless hot water
- Liquid propane tank
- Outdoor water heater with no electricity consumption
- 5 years of warranty cover
Table of Contents
Introduction
The best gas water heater provides you a hot stream of running water without much of wait time. It works on a continuous heating mechanism using gases like Natural gas or Propane or LPG (Liquid Petroleum Gas). These are mostly equipped with over-heat protection or safeguarding against flameouts. The sensors detect long-unused water and drain the excess water to avoid anti-freezing during winters.
These water heaters are wall mountable and can be used either outdoor or indoor, depending on where you prefer to use it. You can conveniently get hot water on-demand without wasting any water and with minimum energy consumption.

Top 10 Best Gas Water Heater Reviews & Comparisons
1. Marey GA5PORT Portable Propane Gas Tankless Water Heater
Marey GA5PORT Portable Gas Tankless Water Heater has unsurpassed quality and innovative features. This has a tankless water heating mechanism and provides you on-demand hot water supply.

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Why we like it
Marey GA5PORT Portable Gas Tankless Water Heater is a sustainable product as it reduces water wastage and consumes no electricity compared to traditional water heaters. This is compact and can be mounted in any traditional or small space in your washroom or outdoors.
Features
- Tankless hot water
- Liquid propane tank
- Endless supply of hot water
- No electricity required
- Zero water wastage
- Compact design and small size to mount
- Suitable for outdoor use
- CSA approved
Pros
- Energy-efficient – 40% less energy consumption than other tanks
- Vents on its own when installed outside
- Small size and compact, easy to fix in a small space
Cons
- Runs on 2D battery, this is to be bought separately
Our Verdict
Marey GA5PORT Portable Gas Tankless Water Heater is CSA approved and carries 5 years of warranty coverage. It can be used outdoors while camping or at beaches. It runs without electricity through 2D battery cells.
2. Rinnai RL Series HE+ Tankless Water Heater
Rinnai RL Series HE+ Tankless Water Heater provides you hot water as and when needed. It is manufactured with innovative water circulating technology that keeps circulating hot water all the time rather than storing it like other water heaters.

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Why we like it
Rinnai RL Series HE+ Tankless Water Heater saves water by providing you hot water fast. Every time you wait for hot water to pour out of your shower or tap, 16 ounces of water is wasted. This heater supplies hot water instantly, thus leading to no wastage.
Features
- Continuous supply of hot water
- Tankless hot water
- Hot water flow rate is 7.5 GPM
- Circ-Logic technology that keeps circulating hot water
- Warranty of 12 months
- Can be used for laundry or dishwashing
- Instant supply of hot water without any wastage
- Compact design and easy to install
Pros
- Trusted and no. 1 selling brand
- Wi-fi service available, no need to fix appointments
- 100% replaceable parts cost less on servicing
- 20 years of life and guaranteed performance for a long time
- Less CO2 emission means saves electricity
Cons
- Needs to be installed indoors only
Our Verdict
Rinnai RL Series HE+ Tankless Hot Water Heater is a top-quality water heater manufactured by the most trusted company, and its technology is unsurpassable. It has a long life and costs you less on service or repair. It is the best gas water heater available in the market today.
3. Ridgeyard Hot Water Heater
Ridgeyard Hot Water Heater is a tankless model, it runs on natural gas and consumes no electricity. This is ideal for indoor bathrooms. There is a faucet to fit in the showerhead.

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Why we like it
Ridgeyard Hot Water Heater is safe and energy-efficient, its sensors detect the flame and automatically shut down in case of a flameout. It is also geared with over water pressure protection mechanism that brings down the pressure beyond a limit.
Features
- Natural gas tankless water heater
- 8L Natural gas needed
- Instant hot water
- Digital display and easy to operate using knobs
- Overwater pressure detection system
- Energy-efficient and saves wastage of water
- Protected against overheating
- Options to heat water in summer and winter
- No electricity consumption
Pros
- ISO and CE clearance
- Automatic ignition of water
- Compact size and easy to install
- Runs on natural gas – needs no electricity supply
Cons
- Gas outlets need to be checked for leakages
Our Verdict
Ridgeyard Hot Water Heater has a smart burner and heater exchanger mechanism to adapt to the energy supply and save it while providing the best heat efficiency. It is compact, and it can be easily installed in a small space indoors.
4. VEVOR Natural Gas Water Heater
VEVOR Natural Gas Water Heater has a modern design, wall mounting feature to save floor space. It is geared with a robust protection mechanism from over-heating, high water pressure, and flameouts. This uses energy efficiently, thus regulating the heat exchanger and boiler for optimum results.

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Why we like it
VEVOR Natural Gas Water Heater provides an unsurpassable showering experience, without making you wait for hot water supply for long. It provides hot water instantly and has a tankless operation to save space in your house.
Features
- Tankless water heater
- Runs on natural gas (12L Capacity)
- Generates 36KW of power
- 3.2 GPM Touchscreen
- Touch screen console with LED display
- Showerhead kit available
Pros
- Low water pressure startup
- Anti-freezing protection available
- Automatic ignition system
- Adjustable controlling knob to adjust the temperature
- Automatic power off in 20 minutes
Cons
- Indoor installation only
Our Verdict
VEVOR Natural Gas Water Heater comes with an advanced self-modulating technology to use only the amount of energy that is needed, this saves 50% of energy cost as compared to traditional water heaters. It is protected against over-heating.
5. Ridgeyard 3.2GPM Water Heater
Ridgeyard 3.2GPM Water Heater has a tankless operation. It has a stainless steel body and a superfast heating mechanism using LPG Propane gas. It has a capacity of 3.2 GPM with digital display and compact size to fit in at a small space.

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Why we like it
Ridgeyard 3.2GPM Water Heater provides hot water instantly for shower or washing purposes. It has strong safety features like protection from overheat or high-water pressure. Also, it starts up when the water pressure is considerably low.
Features
- Tankless water heater
- Runs on Propane LPG 12L capacity
- Instant boiler made of stainless steel
- Indoor boiler made up of stainless steel material
- Overheat protection
- ISO certified
- Low water pressure startup
- Overwater pressure protection
Pros
- In-built protection against flameout
- Over-heating protection over 75 degree Celsius
- ISO 9001:2000; 2 Years Warranty of Parts
- Starts when water pressure is low and automatically switches off when it is very high
Cons
- To be used indoor inside home bathrooms
- Gas leakages must be checked regularly
Our Verdict
Ridgeyard 3.2GPM Water Heater lets you get hot water instantly to perform various chores. It runs on Propane gas and thus saves energy by utilizing the optimally as needed. It has overheat protection, protection against any flameouts, or mechanism to regulate boiler when the water pressure is very high.
6. Thermomate ZERO16 Tankless Water Heater
Thermomate ZERO16 Tankless Water Heater uses propane gas to heat the water. This is an outdoor model and can be easily used in RVs, boats, etc. Its efficient and instant water heating mechanism makes it the best choice for your family.

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Why we like it
Thermomate ZERO16 Tankless Water Heater is easy to install with minimum efforts, it has a compact design. It carries less weight, so you can place it at any suitable spot without occupying much place.
Features
- Outdoor, tankless models run on Propane
- 2 magnetic water flow sensors
- 4.23 GPM for providing water instantly
- Flameout protection, overheating protection
- Anti-freezing drain plug to remove water when not in use
- Easy to install and occupies less space
Pros
- The magnetic sensors make the water run even at very low pressure
- Flameout and overheat protection after 185-degree Fahrenheit
- Shuts off gas supply entirely in case of flameout
- Compact and easy to install
- Can be used outdoors
Cons
- Gas leakages must be checked regularly
Our Verdict
Thermomate ZERO16 Tankless Water Heater is engineered with all kinds of safety mechanism that keeps the product as well as users safe from any harm. This has an anti-freezing technology, the heater automatically shuts down if the temperature goes up, it has flameout protection and starts at very low or minimal water pressure.
7. Excel Pro Tankless Gas Water Heater
Excel Pro Tankless Gas Water Heater does hydronic heating using Natural gas. It has a top-quality Copper heat exchanger to give good quality hot water. It is easy to mount on a wall as its power is vented from the rooftop and sidewalls.

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Why we like it
Excel Pro Tankless Gas Water Heater works on modulating heat technology that modulates heat according to the water flow rate in the tank. You can just set the desired water temperature and enjoy the continuous flow of hot water.
Features
- Tankless water heater that uses Natural gas
- Gives 6.6 GPM of hot water with a 35°F Temperature
- Pure Copper heat exchanger
- Digital display
- Certified to be installed at manufactured houses
- Hydronic baseboard for heating
- European Model with temperature display in Celsius
Pros
- Small yet powerful water heater
- Uses top quality Copper heat exchanger
- Modulates water temperature according to the flow rate
- Digital display easy to set the desired temperature
- Can be installed in all kinds of walls
Cons
- Gas leakages must be checked regularly
Our Verdict
Excel Pro Tankless Gas Water Heater designed to meet all water needs of a small and medium-sized family. It has a European make and model compact yet powerful heater with gas input of 140,000 BTU with a Copper heat exchanger.
8. GASLAND Tankless Water Heater
GASLAND Tankless Water Heater can be used outdoors while camping or at a beach, you can also shower your pets. Hang the water heater with the mounting bracket at the top and use it conveniently with no worries.

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Why we like it
GASLAND Tankless Water Heater has all safety features to keep your house and loved ones safe from any accident. It is protected against over-heating; Anti-freezing protection is provided by draining out the excess water when not in use for long.
Features
- Tankless water heater
- Propane water heater with 6L capacity
- Protected against overheating
- Easy to install
- Can be used in RVs
- Flameout protection
- Anti-freezing protection
Pros
- Gas chamber is completely closed shut off in case of flameout
- Excess water is drained automatically to avoid anti-freezing
- Power output of 41,000 BTU/Hour
- Low water pressure startup at 2.5 PSI
- Completely adjustable water flow and heat
Cons
- Filters need to be changed regularly
Our Verdict
GASLAND Tankless Water Heater helps you enjoy hot water everywhere, even during extreme winters. It is environment-friendly and economical as it saves energy much efficiently than any conventional water heater.
9. Happybuy Propane Hot Water Heater
Happybuy Propane Hot Water Heater can be used indoors as well as outdoors as you prefer. For outdoor usage, these come with a Propane gas controller and a hose. This has knobs to regulate the gas intake as well as water temperature.

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Why we like it
Happybuy Propane Hot Water Heater is approved by CE. It can be used for bathroom showering, hand washing, pet showering, and dishwashing. Ideal for extreme winters to provide on-demand hot water.
Features
- Tankless Propane water heater
- 4.8GPM
- LPG Gas supply with 36KW power
- Hot water output is 18L/min
- Stainless Steel case
- Copper wires – heat resistant
- Propane gas regulator and a hose
- Temperature can be controlled through a knob
Pros
- Over 75℃ over-heat protection
- Low water pressure startup
- Comes with a shower head kit
- Lightweight and compact to be installed on a wall easily
Cons
- Gas outlets must be checked for leakage frequently
Our Verdict
Happybuy Propane Hot Water Heater has a compact and lightweight make. It has a digital display to show the water temperature in degrees Celsius. The summer and winter knob is provided to give the best energy efficiency.
10. AO. Smith GCR 40 ProMax
AO. Smith GCR 40 ProMax is an innovative product designed by one of the most trusted manufacturers. This can be mounted anywhere till a height of 40 feet. It provides water on demand for a large family.

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Why we like it
AO. Smith GCR 40 ProMax is corrosion-resistant does not wear lime and other sediments due to its Blue Diamond glass coating and Dynaclean diffuser per the industry standard. It is made up of PEX cross-linked polymer that lasts longer than other water heaters.
Features
- Corrosion-resistant
- Self-powered electronic gas valve
- Highly advanced microprocessors and sensors to detect water heating
Pros
- Trusted manufacturers
- Advanced technology of microprocessors and sensors
- Sufficient for a big family
- On-demand hot water supply
- Self-powered using Thermopile
- Meets all regulations set forth by NAECA
Cons
- Needs to be checked against any flameout or electrical hazard
Our Verdict
AO. Smith GCR 40 ProMax is an innovative appliance engineered with the most advanced technology keeping in mind your need for hot water all around the year. It provides instant hot water with the least wastage and maximum energy utilization.
Best Gas Water Heater Buying Guide
The choice of water heater you purchase depends to a large extent on how much is your hot water consumption per day, how many members are there in your family, where do you want to install it, in your bathroom space or somewhere outside? Its good to sort out these questions before you hit the road to purchase a water heater for your house.
There are water heaters with tank as well as tankless heaters that use gas or electricity to heat the water while it flows through the water inlet. Tankless water heaters provide a constant flow of hot water on demand rather than storing the water to heat it for use.
Evaluate these water heaters on all the parameters mentioned below to find the best gas water heater for your needs.
Indoor or Outdoor Usage
There are various makes and models of water heater available in the market. However, it depends on where do you want to install it and what the usage is. There is storage as well as tankless water heaters. Choose the one that best fits your requirements and can be used for a long time.
Storage or Tankless
Both the varieties are available in the market storage water heaters are more common, but few know about tankless water heaters. Tankless water heaters use electricity or gas to heat the water flowing through the inlet and provide a constant supply of hot water as and when needed. These are more advanced and usable during any season or any time of the day. Tankless water heaters consume less energy and also save on your electricity bill.
Capacity
The capacity or power output of your water heater must be matched with the usage or requirement in one go. For example, if your water consumption is 25 liters in one go, the tank capacity should be at least 25L or more. The heating power output must be chosen depending on what time of the year are you going to use it? What are the tasks you are going to use the hot water for like: showering, washing the dish, bathing pets, etc.? Choose the one that closely matches your requirement.
Safety Features
It is vital to consider a few safety features while you want to use water heaters at your home or RVs etc. Strong safety measures keep the product safe and protect your family from any harm in the long run. Some of the common safety features in water heaters are over-heat protection, prevention of flameouts, gas leakages, detection, and moderation when water pressure is more, safety against dry combustion, etc.
Best Gas Water Heater FAQs
It is first essential to look for your hot water requirement and space available where you want to mount it. Next, look at what technology you would prefer. There are storage geysers and tankless water heaters which use electricity or gas to heat water and supply hot water instantly. Evaluate if all the safety measures are there and also the certifications or clearance bagged by the product.
While deciding about the cost-effectiveness of a water heater, it is not just the price that matters most. The maintenance cost of some water heaters may shoot up very high if this is not considered carefully in the first place. Tankless water heaters always save 40-50% on energy consumption. After-sales service and its terms and conditions should also be understood before you zero down on one product.
The capacity of water heater must be chosen based on how much water you are consuming in one go. If your one-time consumption is 15 Liters, you should choose a water heater above 15Liters of capacity.
As you may need maintenance and repair of the water heater after some time, it is advisable to play it safe and get it installed from the supplier than doing it all by yourself.
The water heater slowly wears some lime or other sediments deposit that corrodes the storage unit, for best performance, it is suggested to drain or flush the water at the bottom once every year and keep the water storage as clean as possible.
Conclusion
Gas water heaters take care of your every-day hot water need. You can install it indoor, in your bathroom area, or in an open space as you prefer. These water heaters can also be mounted on your RVs and can be used while you are camping, traveling, staying at a beach. These provide on-demand hot water with the least water wastage at a desirable temperature. Many water heaters come with an adjustable water pressure and temperature controllers. Use our guide on the best gas water heaters to find the best one for your home.
Last update on 2021-03-23 at 02:33 / Affiliate links / Images from Amazon Product Advertising API