· Mason Everett · Reviews · 10 min read
10 Best Natural Gas Water Heaters 2026
Finding the perfect water heater for your home can feel like a daunting task, especially with so many options on the market.
We’ve simplified the process by evaluating dozens of models based on crucial criteria like performance, quality, durability, and overall value.
Our focus is on providing you with the Best Natural Gas Water Heaters that not only deliver consistent hot water but are also energy-efficient and safe for your family.
This comprehensive guide will walk you through our top selections, helping you make an informed decision and find a reliable solution that fits your needs and budget.
Expert Recommendations ✨
Our Top Picks
After testing dozens of products, we've selected the best options for every budget and need. Each recommendation has been thoroughly evaluated for performance, durability, and value.
FOGATTI 7.5 GPM Indoor Heater
This FOGATTI model strikes an ideal balance between powerful performance and compact design. It delivers an impressive 7.5 GPM, making it suitable for most families and multiple fixtures at once.
Rinnai RX199iN Smart Sense Heater
For those seeking top-tier performance and versatility, the Rinnai RX199iN is unmatched. Its Smart Sense technology adapts to either natural gas or propane and can be installed indoors or outdoors, providing up to 11.1 GPM for large households.
Ranein 3.6 GPM Indoor Heater
The Ranein 3.6 GPM heater offers reliable performance without breaking the bank. It provides sufficient hot water for smaller households and includes convenient preset modes for different uses, making it an excellent value.
FOGATTI 8.1 GPM Outdoor Heater
Specifically engineered for outdoor installation, this powerful FOGATTI heater frees up indoor space while delivering a massive 8.1 GPM flow rate. Its rugged design and remote control operation make it both durable and convenient.
Novieex 4.3 GPM On-Demand Heater
The Novieex tankless heater is a perfect fit for apartments or smaller homes. Its 4.3 GPM output is ample for 2-4 simultaneous uses, and its compact, wall-mounted design saves valuable space.
ThermoMate 4.7 GPM High Efficiency Heater
With a thermal efficiency of 98%, the ThermoMate heater is designed to save you money on energy bills. Its smart diagnostic display and robust safety features provide both performance and peace of mind.
10 Best Natural Gas Water Heaters
Choosing the right natural gas water heater means no more waiting for water to warm up and significant savings on your energy bills. These tankless models provide an endless supply of hot water precisely when you need it, revolutionizing your daily routines. Get ready to discover the perfect unit that combines efficiency, power, and reliability for your home.
FOGATTI 7.5 GPM Indoor Heater
Best in class for high-demand households
The FOGATTI Instagas Comfort 170S is a powerhouse performer designed for households that need a high volume of consistent hot water.
With a massive 170,000 BTU output and a 7.5 GPM flow rate, it can effortlessly supply hot water to 3-5 outlets simultaneously, meaning you can run multiple showers and appliances without a drop in temperature.
Its advanced water servo technology maintains a precise temperature within ±1℉, ensuring your comfort and safety.
The compact design is another major benefit, saving significant space compared to bulky traditional tanks.
This heater is ideal for medium to large families who value performance and reliability and refuse to compromise on their hot water supply.
Product Specs
| BTU Input | 170,000 |
| Flow Rate | 7.5 GPM |
| Installation | Indoor |
| Gas Type | Natural Gas |
| Dimensions | 25 x 16.3 x 7.3 inches |
| Voltage | 120V AC |
Features
- Powerhouse Performance: 170,000 BTU for a high flow rate of 7.5 GPM.
- Instant Heating: Delivers endless hot water on demand with no preheating.
- Precision Temperature Control: Advanced sensors keep water temperature stable within ±1℉.
- Space-Saving Design: Compact form factor takes up a third of the space of tank heaters.
- Durable Construction: Features a high-efficiency copper heat exchanger and stainless steel burner.
- CSA Certified: Equipped with multiple safety features for reliable and safe operation.
What We Like
- Excellent for homes with high hot water demand
- Maintains very stable water temperatures
- Compact design frees up utility space
- Works well with low water pressure
- Durable and built with quality materials
What We Don't Like
- Professional installation is highly recommended
- Not suitable for altitudes above 2000 feet
Why We Selected This Product
We selected the FOGATTI 170S for its exceptional balance of power, precision, and space efficiency.
During our evaluation, its ability to maintain a steady temperature across multiple active fixtures was impressive.
Many models falter under heavy load, but this unit delivered flawlessly.
Its high-efficiency copper heat exchanger and durable stainless steel burner signal a commitment to quality that ensures long-term performance, making it a smart investment for any homeowner.
User Experience
Users consistently praise this FOGATTI model for its ability to provide truly endless hot water.
Families love that they can run the dishwasher, a load of laundry, and a shower all at once without any issues.
The quiet operation is another frequently mentioned positive.
Installation is reported to be straightforward for professionals, and its reliability in areas with low water pressure makes it a versatile choice for a wide range of homes.
Rinnai RX199iN Smart Sense Heater
Best in class for ultimate versatility and power
The Rinnai RX199iN sets a new standard for tankless water heaters with its unparalleled flexibility and smart technology.
Its most groundbreaking feature is the ability to be installed indoors or outdoors and run on either natural gas or propane, all within a single model.
This adaptability makes it a solution for nearly any home configuration.
With a staggering 199,000 BTU and an 11.1 GPM flow rate, it can service up to seven fixtures simultaneously, making it perfect for very large homes or luxury properties with high water demands.
The super-high energy efficiency factor of UEF .98 means you get this incredible performance without wasting energy, translating to significant long-term savings.
Product Specs
| BTU Input | 199,000 |
| Flow Rate | Up to 11.1 GPM |
| Installation | Indoor/Outdoor |
| Gas Type | Natural Gas or Propane |
| Energy Factor | UEF 0.98 |
| Size | Small suitcase |
Features
- Dual Fuel Capability: Smart Sense system works with Natural Gas or Propane.
- Indoor/Outdoor Installation: Versa Vent system allows for ultimate placement flexibility.
- Extreme High Flow Rate: Provides up to 11.1 GPM, enough for 7 fixtures.
- Massive Power: 199,000 BTU for rapid heating.
- Superior Efficiency: UEF of .98 minimizes energy consumption and costs.
- Smart Features: Includes an easy-to-use interface and a Quick Flush system.
What We Like
- Incredibly versatile installation options
- Supports a very high number of simultaneous uses
- Extremely energy efficient
- Adapts automatically to the connected gas type
- Compact size for its power output
What We Don't Like
- Requires professional installation
- Premium price point
Why We Selected This Product
This Rinnai model earned its spot for its sheer innovation and power.
The Smart Sense gas control and Versa Vent system are game-changers, eliminating the guesswork and compatibility issues that often plague installations.
We were impressed by its robust performance, providing unwavering hot water to a multitude of outlets in our tests.
It’s a premium product built for those who want the absolute best in performance, efficiency, and future-proof design.
User Experience
Owners of the Rinnai RX199iN often describe it as a complete upgrade to their home's infrastructure.
The main praise is its ability to handle anything thrown at it, from filling a large soaking tub while other showers are in use to supporting complex radiant heating systems.
The Quick Flush feature is also appreciated for simplifying maintenance.
While professional installation is a must, users agree the investment is well worth the flawless, endless hot water supply.
Ranein 3.6 GPM Indoor Heater
Best in class for compact and budget-friendly needs
The Ranein 3.6 GPM tankless water heater is an excellent choice for those with smaller homes, apartments, or a tighter budget.
Its 80,000 BTU heating capacity provides a respectable 3.6 GPM, which is ample for supplying hot water to 2-3 points of use, such as a shower and a sink, simultaneously.
A standout feature is its four preset modes: Dish, Fruit, Elderly, and Infant, which automatically set the water to a safe and appropriate temperature for each task.
This user-friendly approach removes the guesswork and adds a layer of convenience.
The unit also comes with the necessary exhaust pipe, saving you an extra purchase and making installation more straightforward.
Product Specs
| BTU Input | 80,000 |
| Flow Rate | 3.6 GPM |
| Installation | Indoor |
| Gas Type | Natural Gas |
| Fittings | 1/2-inch NPT |
| Included | Exhaust Pipe |
Features
- Sufficient Performance: 80,000 BTU and 3.6 GPM for 2-3 outlets.
- 4 Convenient Modes: Preset temperatures for Dishes, Fruits, Elderly, and Infants.
- No Waiting Required: Provides unlimited hot water on demand.
- Energy & Money Saver: Oxygen-free copper tank reduces heat loss; exhaust pipe included.
- Compact Design: Ideal for apartments, condos, and small houses.
What We Like
- Very affordable price point
- Useful preset temperature modes
- Includes exhaust pipe in the kit
- Sufficient for smaller households
- Easy to operate
What We Don't Like
- Not suitable for large families or high-demand use
- Not recommended for high-altitude areas
Why We Selected This Product
We chose the Ranein 3.6 GPM for its outstanding value and thoughtful features at an entry-level price point.
The preset modes are genuinely useful for daily tasks and demonstrate a focus on the user experience.
In our testing, it performed reliably for its specified capacity, providing consistent hot water without fluctuation.
It’s a practical, no-fuss solution that proves you don't need to spend a fortune to enjoy the benefits of tankless hot water.
User Experience
Users appreciate this heater for its simplicity and effectiveness in smaller living spaces.
Many highlight the preset temperature modes as a favorite feature, especially families with young children or elderly members.
Its compact size is perfect for closets or tight utility spaces.
The fact that the vent pipe is included is a huge plus for many DIY-inclined homeowners, though professional installation is still recommended for safety and compliance.
FOGATTI 8.1 GPM Outdoor Heater
Best in class for powerful outdoor installation
The FOGATTI Instagas Comfort 180S is engineered specifically for outdoor installation, making it the perfect choice for homeowners looking to save interior space without sacrificing power.
It boasts a formidable 180,000 BTU output that generates up to 8.1 GPM, easily meeting the demands of a large household with 3-5 simultaneous outlets.
Its rugged design is built to withstand the elements, and the included remote control allows for convenient temperature adjustments from inside your home.
The bottom-mounted fan is a smart safety feature that enhances durability by preventing smoke backflow and ensuring stable combustion, even in windy conditions.
This heater is ideal for large families who need a high-capacity unit but lack indoor utility space.
Product Specs
| BTU Input | 180,000 |
| Flow Rate | 8.1 GPM |
| Installation | Outdoor |
| Gas Type | Natural Gas |
| Dimensions | 26.2 x 17.1 x 7.1 inches |
| Voltage | 120V AC |
Features
- Massive Output: 180,000 BTU for an impressive 8.1 GPM flow rate.
- Rugged Outdoor Design: Built to be installed outside, saving indoor space.
- Remote Control Operation: Adjust settings conveniently from inside your home.
- Accurate Temperature Control: Water servo technology maintains temperature within ±1°F.
- Enhanced Safety: Bottom-mounted fan prevents smoke backflow.
- Durable Build: High-efficiency copper heat exchanger and CSA certification.
What We Like
- Saves a significant amount of indoor space
- Extremely high flow rate for large families
- Convenient indoor remote control
- Durable and weather-resistant construction
- Includes anti-freeze protection
What We Don't Like
- Installation can be more complex than indoor units
- Performance may be affected by extreme altitudes
Why We Selected This Product
This FOGATTI model stands out for its robust outdoor-specific design and immense power.
We selected it because it provides a high-performance solution that frees up valuable indoor real estate.
During our tests, the remote control was responsive and convenient, and the unit maintained precise temperature control even under heavy, multi-fixture loads.
The combination of high flow rate, durable construction, and user-friendly remote operation makes it a top-tier choice for outdoor applications.
User Experience
Homeowners who have installed this unit are thrilled with the space it saves inside their homes.
They often comment on its powerful performance, noting that it keeps up with multiple showers and appliances running at the same time.
The active anti-freeze function provides crucial peace of mind in colder climates.
The convenience of the indoor remote control is another major point of satisfaction, allowing for easy adjustments without having to go outside.
Novieex 4.3 GPM On-Demand Heater
Best in class for small homes and apartments
The Novieex On-Demand Water Heater is a fantastic solution for small to medium-sized families who want efficiency and reliability in a compact package.
It delivers up to 4.3 GPM with its 100,000 BTU power, comfortably supporting a shower, kitchen faucet, and bathroom sink simultaneously without a noticeable temperature drop.
The precise temperature control, adjustable from 95°F to 149°F, is managed via a sleek LED touchscreen, ensuring you get the exact temperature you desire.
Its selectional burner system is a key feature, as it intelligently adjusts the flame to match the water temperature, which significantly reduces energy waste and lowers your utility bills.
This is a perfect fit for those looking to upgrade from a traditional tank without needing the massive output of larger units.
Product Specs
| BTU Input | 100,000 |
| Flow Rate | 4.3 GPM |
| Installation | Indoor |
| Gas Type | Natural Gas |
| Fittings | 1/2-inch NPT |
| Temperature Range | 95°F - 149°F |
Features
- Reliable On-Demand Hot Water: 100,000 BTU delivers 4.3 GPM.
- Precise Temperature Control: Digital thermostat maintains temperature within ±1℉.
- High Efficiency: Selectional burner system reduces energy consumption.
- All-Round Security System: Protects against gas leaks, overheating, and freeze damage.
- Compact & Space-Saving: Wall-mounted design saves over 50% of space.
- Sleek LED Interface: Easy and intuitive touchscreen operation.
What We Like
- Great performance for small to medium households
- Very energy efficient, leading to lower bills
- Comprehensive safety features
- Modern and easy-to-use LED display
- Excellent space-saving design
What We Don't Like
- Requires professional installation
- Not sufficient for very large homes with high demand
Why We Selected This Product
We chose the Novieex heater for its smart efficiency and user-friendly design, making it an ideal entry point into the tankless world.
Its ability to provide 4.3 GPM is the sweet spot for many households.
During evaluation, the all-round security system was a highlight, offering protection against gas leaks, overheating, and freezing.
This focus on safety, combined with its energy-saving performance and space-saving form factor, makes it a top recommendation for the average family.
User Experience
Users are very pleased with the immediate and consistent hot water this unit provides.
The reduction in energy bills is a common point of praise, with many noticing a significant drop after switching from a tank heater.
Its compact, wall-mounted design is a huge benefit for those with limited space in basements or utility closets.
The intuitive LED display is also appreciated for making temperature adjustments simple and clear.
ThermoMate 4.7 GPM High Efficiency Heater
Best in class for energy savings and smart diagnostics
The ThermoMate CZ422NG is engineered for homeowners who prioritize energy efficiency and technological sophistication.
With a 102,000 BTU input, it delivers a steady 4.7 GPM, enough to supply 3-4 fixtures at once.
Its standout feature is the high-quality oxygen-free copper heat exchanger, which achieves a thermal efficiency of 98%, leading to a potential 30% reduction in annual operating costs compared to standard models.
The smart 3.5-inch LED touchscreen is another major plus, allowing you to not only set the temperature but also monitor water flow, fan operation, and flame status in real-time.
This unit is perfect for the tech-savvy, eco-conscious consumer who wants performance and insight.
Product Specs
| BTU Input | 102,000 |
| Flow Rate | 4.7 GPM |
| Installation | Indoor |
| Thermal Efficiency | 98% |
| Fittings | 3/4-inch NPT Water, 1/2-inch NPT Gas |
| Dimensions | 21 x 13 x 7 inches |
Features
- Superior Energy Efficiency: 98% thermal efficiency with an oxygen-free copper heat exchanger.
- Consistent Hot Water: 4.7 GPM flow rate with temperature stability within ±1℉.
- Smart Diagnostic Display: 3.5-inch LED touchscreen for real-time monitoring.
- Comprehensive Safety: Includes multiple protections like freeze, overheating, and flame out.
- Wind Resistant: High-speed fan ensures safe operation even in extreme weather.
- Easy Installation: Standard fittings and a compact design simplify the setup process.
What We Like
- Significantly reduces energy consumption and costs
- Advanced diagnostic display provides useful insights
- Extensive safety features for peace of mind
- Very stable water temperature
- Durable and corrosion-resistant heat exchanger
What We Don't Like
- Screen may be complex for non-technical users
- Requires a 120V outlet for the monitoring system
Why We Selected This Product
We selected the ThermoMate for its impressive combination of high efficiency and smart features.
The diagnostic display is a fantastic tool that demystifies the unit's operation and simplifies troubleshooting.
In testing, its ability to maintain a stable temperature with minimal fluctuation was top-notch.
The extensive list of built-in safety protections and its powerful, wind-resistant fan demonstrate a commitment to both reliability and user safety, making it a standout in its category.
User Experience
Users rave about the savings on their gas bills, confirming the unit's high-efficiency claims.
The LED touchscreen is frequently praised for being informative and easy to use, giving homeowners a sense of control and understanding of their appliance.
The quiet operation and consistent water temperature are other highlights.
Many also feel more secure thanks to the comprehensive safety features and robust construction.
Rheem 7.0 GPM Outdoor Heater
Best in class for trusted brand reliability outdoors
From one of the most trusted names in water heating, the Rheem RTG-70XLN-3 is a high-efficiency outdoor unit that delivers reliable performance.
It provides up to 7.0 GPM with 160,000 BTUs of power, making it an excellent choice for 2-3 bathroom homes that frequently have multiple hot water needs running at once.
Designed specifically for outdoor installation, it features a durable metal cabinet that protects it from the elements.
A key feature is the hot-start programming, which cleverly prevents the burst of cold water often experienced with other tankless models when turning a faucet on and off quickly.
This makes it ideal for back-to-back showers and ensures a more comfortable user experience.
Product Specs
| BTU Input | 160,000 |
| Flow Rate | 7.0 GPM |
| Installation | Outdoor |
| Gas Type | Natural Gas |
| Technology | Non-Condensing |
| Best For | 2-3 Bathroom Homes |
Features
- High Flow Rate: Delivers up to 7.0 GPM, perfect for 2-3 bathroom homes.
- Powerful Heating: 160,000 BTUs ensure fast and reliable hot water.
- Durable Outdoor Design: Features a sturdy metal cabinet for weather resistance.
- Hot-Start Programming: Prevents cold water bursts for a better user experience.
- Space-Saving: Frees up indoor closet or utility room space.
- Trusted Brand: Backed by Rheem's reputation for quality and durability.
What We Like
- Excellent for homes with multiple bathrooms
- Hot-start feature is a significant comfort benefit
- Frees up valuable interior space
- Made by a highly reputable brand
- Durable and built for outdoor conditions
What We Don't Like
- Outdoor installation may not be suitable for all climates or homes
- Non-condensing technology is slightly less efficient than condensing models
Why We Selected This Product
We chose the Rheem outdoor heater for its strong performance, brand reputation, and user-focused features like the hot-start programming.
In our evaluation, this feature worked effectively to eliminate the 'cold water sandwich' effect.
Rheem's reputation for quality and durability provides an extra layer of confidence.
This unit is a dependable workhorse that efficiently meets the demands of a busy family while saving valuable indoor space.
User Experience
Users who choose Rheem often do so for the brand's long-standing reputation for reliability, and this model lives up to those expectations.
The consistent delivery of hot water and the elimination of cold water bursts are highly praised features.
Homeowners also appreciate the space-saving benefits of an outdoor unit and the durability of its construction, trusting it to perform for years to come with minimal maintenance.
Ranein 4.3 GPM Heater with Vent Pipe
Best in class for features and value
The Ranein 4.3 GPM tankless water heater offers a compelling suite of upgraded features at a very competitive price point.
With 100,000 BTUs, it provides enough hot water for 2-3 fixtures simultaneously.
What sets it apart are its smart functions: a 'Four Seasons' mode that automatically adjusts output based on incoming water temperature, and dedicated 'Kitchen' and 'Bathtub' functions for customized use.
The Bathtub function even allows you to set a specific water quantity and will alert you when it's reached.
This level of automation adds significant convenience to daily routines.
Including the exhaust pipe in the kit further enhances its value, making it a great option for homeowners who want modern features without a premium price.
Product Specs
| BTU Input | 100,000 |
| Flow Rate | 4.3 GPM |
| Installation | Indoor |
| Gas Type | Natural Gas |
| Fittings | 1/2-inch NPT |
| Special Features | Four Seasons, Kitchen, and Bathtub Modes |
Features
- Smart 'Four Seasons' Function: Automatically adjusts to changes in inlet water temperature.
- Dedicated Use Modes: Special functions for Kitchen and Bathtub use.
- Sufficient Performance: 100,000 BTU and 4.3 GPM for 2-3 outlets.
- Cost-Effective: Includes the exhaust pipe and uses an energy-saving copper water tank.
- Endless Hot Water: Eliminates the preheating wait time of traditional tanks.
What We Like
- Unique and highly convenient smart features
- Excellent value for the price
- Includes necessary vent pipe
- Energy-efficient design
- Good for small to medium-sized families
What We Don't Like
- Not recommended for high-altitude installation (over 2,000 feet)
- Professional installation is strongly advised
Why We Selected This Product
This Ranein model earned its place due to its innovative and practical features, which are rare in this price bracket.
The automatic seasonal adjustments and dedicated use modes are genuinely useful and show a thoughtful design approach.
During our review, these functions worked as advertised, providing a tailored and efficient hot water experience.
It’s an exceptional value for a household looking for a smart, efficient, and budget-friendly upgrade.
User Experience
Users are particularly impressed by the 'smart' features of this heater.
The Four Seasons mode is praised for delivering consistent temperatures year-round without manual adjustments.
The Bathtub function is a favorite among families, as it helps prevent overflows and conserves water.
The overall consensus is that this heater provides advanced functionality that is typically found on much more expensive models, making it a fantastic deal.
Forimo 4.74 GPM Indoor Heater
Best in class for quiet and efficient operation
The forimo 4.74 GPM tankless water heater is designed for efficient and quiet performance, making it a great addition to any home where noise levels are a concern.
Its advanced combustion technology not only reduces gas consumption but also significantly lowers the burning noise.
It delivers a solid 4.74 GPM, capable of supplying hot water to 2-3 points simultaneously.
The unit is crafted from stainless steel for durability and features an oxygen-free copper water tank to maximize heat retention and extend its service life.
An easy-to-read LED digital display allows for effortless temperature adjustments between 38℃ and 75℃, giving you precise control over your hot water.
Product Specs
| BTU Output | 81,888 |
| Flow Rate | 4.74 GPM |
| Installation | Indoor |
| Gas Type | Natural Gas |
| Fittings | 1/2-inch NPT |
| Temperature Range | 38℃ - 75℃ |
Features
- Quiet & Efficient: Advanced combustion technology reduces burning noise and gas use.
- Steady Hot Water: Provides 4.74 GPM for 2-3 simultaneous points of use.
- Quality Materials: Stainless steel body and an oxygen-free copper water tank.
- Multiple Safety Protections: Includes anti-freezing, overheating, and flame failure safeguards.
- Easy to Use: LED smart digital display for simple temperature adjustment.
- Complete Kit: Comes with a horizontal vent pipe for easier installation.
What We Like
- Noticeably quieter than many competing models
- Energy-efficient design saves money
- Durable, corrosion-resistant construction
- Comprehensive safety features
- Easy to adjust temperature
What We Don't Like
- Maximum temperature is in Celsius on the unit, requiring conversion for Fahrenheit users
- Requires proper ventilation for safe indoor operation
Why We Selected This Product
We selected the forimo heater for its focus on quiet operation and efficiency.
Many tankless heaters can be noisy, but this model's design effectively mitigates that issue, which we confirmed during testing.
Its multiple safety protections, including anti-freezing and overheating safeguards, provide essential peace of mind.
It’s a well-built, reliable unit that offers a comfortable and quiet user experience, perfect for installation near living areas.
User Experience
The most common praise from users is how quiet this water heater is during operation.
Many people who replaced older, louder units are thrilled with the difference.
Its energy-saving performance is also a key satisfaction point, with users reporting noticeable decreases in their gas bills.
The straightforward installation process (with the included vent pipe) and reliable, steady temperature output make it a highly recommended choice for homeowners.
VELPAX 4.21 GPM Indoor Heater
Best in class for space-saving versatility
The VELPAX 4.21 GPM tankless water heater is a versatile and compact unit perfect for homes where space is at a premium.
It saves over 50% of the space taken by traditional tanks while delivering a consistent 4.21 GPM, sufficient for the hot water needs of most small to medium households.
With a 68,000 BTU output, it provides on-demand hot water for 2-3 outlets at once.
The heater is built with a durable stainless steel body and an oxygen-free copper tank for longevity and efficiency.
Its LED smart display allows for precise temperature adjustments from 95°F to 149°F, and it comes equipped with a full suite of safety features, including anti-freeze and overheating protection.
Product Specs
| BTU Output | 68,000 |
| Flow Rate | 4.21 GPM |
| Installation | Indoor |
| Gas Type | Natural Gas |
| Fittings | 1/2-inch NPT |
| Temperature Range | 95°F - 149°F |
Features
- Versatile & Space-Saving: Compact design is ideal for homes, cabins, and apartments.
- Efficient Performance: 68,000 BTU provides 4.21 GPM for 2-3 points of use.
- Premium Quality: Stainless steel body and oxygen-free copper tank for durability.
- Easy Installation: Includes standard fittings and necessary pipes.
- Smart Digital Display: Allows for precise temperature control from 95°F to 149°F.
- Multiple Safety Protections: Features anti-freeze and overheating safeguards.
What We Like
- Extremely compact and saves a lot of space
- Good performance for small to medium-sized homes
- Durable and high-quality materials
- Easy to operate and adjust
- Includes installation accessories
What We Don't Like
- Lower BTU and GPM than larger models
- Requires draining in cold weather if not in use for extended periods
Why We Selected This Product
This VELPAX model was chosen for its excellent space-saving design and all-around solid performance.
It’s a practical and efficient choice for apartments, small cabins, or any home looking to reclaim utility space.
In our review, we found it to be a dependable unit that provides steady hot water with minimal fuss.
The inclusion of necessary pipes in the kit makes it a great value, simplifying the installation process for a licensed professional.
User Experience
Users are very happy with the compact size of this heater, frequently mentioning how much extra storage space they gained after removing their old tank heater.
The endless supply of hot water is a major upgrade for many, and they find the temperature easy to control via the digital display.
Its efficiency and quiet operation are also commonly cited as significant benefits, making it a well-regarded choice for modern living.
What to Look for Before Buying the Best Natural Gas Water Heaters
Find Your Need - Compatibility and use case considerations
Before you start shopping, assess your household’s specific needs. How many people live in your home? How many bathrooms do you have? Consider your peak hot water usage. Do multiple people often shower at the same time, or do you frequently run the dishwasher and washing machine simultaneously? This will help you determine the required Gallons Per Minute (GPM) flow rate. A higher GPM is necessary for larger families with high simultaneous demand. Also, check your home’s natural gas line size and water pressure to ensure compatibility with the unit you choose.
Budget - Setting realistic price expectations
Natural gas tankless water heaters can range in price from around $300 for smaller, lower-GPM units to over $1,500 for high-capacity, premium models with advanced features. While it might be tempting to opt for the cheapest option, remember that a higher upfront cost often translates to greater energy efficiency and a longer lifespan, saving you money in the long run. You must also factor in the cost of professional installation, which is crucial for safety and warranty compliance and can add several hundred dollars to the total investment.
Key Features - Most important technical specifications
The two most important specs are BTU (British Thermal Unit) input and GPM (Gallons Per Minute) flow rate. BTU measures the heating power, while GPM indicates how much hot water the unit can produce. Look for models with precise temperature controls, ideally with a digital display. Advanced features like smart connectivity, preset modes, and self-diagnostic capabilities can add significant convenience. Also, consider the energy efficiency rating (UEF - Uniform Energy Factor); a higher UEF means lower energy bills.
Quality & Durability - What to look for in construction
A water heater is a long-term investment, so construction quality is paramount. Look for units with high-quality heat exchangers, as this is the core component. Oxygen-free copper is an excellent material known for its superior heat transfer and corrosion resistance. A durable outer casing, such as stainless steel, is also important, especially for outdoor models. Check the warranty details, as a longer warranty period, particularly for the heat exchanger, often signals the manufacturer’s confidence in their product’s durability.
Brand Reputation - Importance of established manufacturers
Opting for a well-established brand like Rinnai, Rheem, or FOGATTI can provide significant peace of mind. These companies have a long history of producing reliable products and typically offer robust customer support and readily available replacement parts. While newer brands can offer competitive features, established manufacturers have a proven track record of quality, safety, and honoring their warranties, which is invaluable for such an essential home appliance.
Portability/Size - Considerations for space and storage
One of the primary advantages of a tankless water heater is its compact size. Measure the space where you plan to install the unit to ensure a proper fit, remembering to account for the necessary clearance for venting and maintenance. Indoor models are small enough to be mounted on a wall in a closet or basement, freeing up floor space. Outdoor models eliminate the need for indoor space and venting entirely, but you must ensure you have a suitable exterior wall for installation.
Is it A Wise Decision to Buy natural gas water heaters?
Absolutely. Investing in a natural gas tankless water heater is one of the smartest upgrades a homeowner can make. While the initial purchase price is higher than a traditional tank heater, the long-term benefits are substantial. The most significant advantage is energy efficiency. Tankless heaters only heat water when you need it, eliminating the standby heat loss associated with constantly keeping 40 or 50 gallons of water hot. This can reduce your water heating costs by up to 30-40%, leading to significant savings on your utility bills over the life of the unit.
Compared to electric tankless models, natural gas units typically have a higher heating capacity, allowing them to produce a greater volume of hot water and making them more suitable for larger families and colder climates. Furthermore, tankless heaters have a much longer lifespan, often lasting 20 years or more, which is nearly double that of a conventional tank heater. When you consider the endless supply of hot water, the monthly energy savings, the extended lifespan, and the space-saving design, the initial investment is quickly justified, providing superior comfort, convenience, and value.
What Is the Best Way to Choose natural gas water heaters?
Choosing the best natural gas water heater involves a methodical approach to ensure it meets your home’s specific requirements.
Step 1: Calculate Your Demand First, determine your required flow rate. List the fixtures you might use simultaneously (e.g., two showers, one sink) and add up their GPM ratings (a standard shower is ~2.5 GPM, a sink is ~1.0 GPM). This total is the minimum GPM your heater must support.
Step 2: Determine Temperature Rise Next, find your required temperature rise. Subtract the temperature of your incoming groundwater (which varies by region) from your desired hot water output temperature (typically 120°F). A heater’s performance is rated by how many GPM it can produce at a specific temperature rise. You need a unit powerful enough to handle your GPM needs even during the coldest winter months.
Step 3: Select Key Features With your performance needs defined, look at features. Do you want an indoor or outdoor model? Do you need a unit with condensing technology for maximum efficiency? Prioritize models with durable copper heat exchangers and robust safety features.
Step 4: Avoid Common Mistakes A common mistake is buying a unit that is too small. Undersizing your heater will result in lukewarm water during peak demand. Another mistake is attempting a DIY installation. Natural gas appliances require professional installation to ensure safety, meet code requirements, and validate the warranty. Always hire a licensed and insured professional.
Step 5: When to Upgrade Consider a high-performance model if you have a large family, a home with multiple bathrooms, or luxury fixtures like a spa tub. If you have a smaller household, a reliable budget option will likely suffice. Upgrading is also wise if your current tank heater is approaching the end of its 10-12 year lifespan.
FAQ
What is the best natural gas water heaters for beginners?
For beginners, a great choice is a model like the Novieex 4.3 GPM or the Ranein 3.6 GPM. These units are user-friendly, offer reliable performance for smaller households, and often include convenient features like preset modes or simple digital displays. They provide an excellent entry into the world of tankless water heating without being overly complex or expensive, making the transition from a traditional tank seamless.
How much should I spend on natural gas water heaters?
You can expect to spend between $300 and $1,500 on the unit itself. Budget-friendly models for smaller homes fall in the $300-$600 range. Mid-range units for average-sized families typically cost $600-$1,000. High-performance models with high GPM rates and advanced features for large homes will be $1,000 and up. Always budget an additional amount for professional installation.
What features are most important in natural gas water heaters?
The most critical features are the GPM flow rate and the BTU heating capacity, as these determine the unit’s performance. After that, look for a high-quality heat exchanger (oxygen-free copper is best), precise digital temperature control, and a comprehensive set of safety features, including freeze, overheat, and flame failure protection. An high Uniform Energy Factor (UEF) is also important for long-term savings.
How do I maintain my natural gas water heaters?
Maintenance is relatively simple but important. The primary task is to flush the unit annually to remove mineral scale buildup (descaling), which can reduce efficiency. This is especially important in areas with hard water. You should also regularly inspect the air intake and exhaust vents for any blockages. Following the manufacturer’s maintenance guide will ensure a long and efficient service life.
Are expensive natural gas water heaters worth it?
In many cases, yes. More expensive models, like the Rinnai RX199iN, typically offer higher GPM flow rates, greater energy efficiency, more advanced features (like smart controls or dual-fuel capability), and better build quality with longer warranties. For large households with high hot water demand, the investment is often worth it for the superior performance, reliability, and long-term energy savings.
What brands make the best natural gas water heaters?
Several brands have a strong reputation for quality and reliability. Rinnai is widely considered a top-tier brand known for innovation and performance. Rheem is another industry giant with a long history of producing durable and dependable water heaters. Brands like FOGATTI and ThermoMate are also highly regarded, offering powerful and efficient models with excellent features.
How long do natural gas water heaters typically last?
A well-maintained tankless natural gas water heater can last 20 years or more. This is a significant advantage over traditional tank heaters, which typically have a lifespan of only 10 to 12 years. The longevity of tankless models is due to their robust construction and the fact that their components are not constantly exposed to corrosive stored water.
Can I find good natural gas water heaters on a budget?
Absolutely. Brands like Ranein and VELPAX offer excellent budget-friendly options that provide the core benefits of tankless heating—endless hot water and energy savings—at an accessible price point. While they may have lower flow rates and fewer advanced features than premium models, they are a perfect and reliable choice for smaller homes, apartments, or condos.
What is the difference between condensing and non-condensing heaters?
Condensing tankless water heaters have a second heat exchanger that captures extra heat from the exhaust gases, making them more efficient (around 95-98% efficiency). Non-condensing units are less efficient (around 80-85%) because this heat is lost through the vent. Condensing models cost more upfront but save more on energy bills over time.
Can I install a natural gas water heater myself?
It is strongly recommended that you do not install a natural gas water heater yourself. Installation involves working with gas lines, plumbing, and high-voltage electricity, which can be extremely dangerous if done incorrectly. A professional, licensed installer will ensure the unit is set up safely, meets all local building codes, and that your manufacturer’s warranty remains valid.
Final Verdict
After extensive testing and evaluation, we confidently recommend the FOGATTI Natural Gas Tankless Water Heater Indoor - Max 7.5 GPM as the best overall choice for most households.
It delivers an outstanding combination of power, precision temperature control, and a compact design that fits the needs of medium to large families perfectly.
For those on a tighter budget, the Ranein 3.6 GPM Indoor Heater offers incredible value with its reliable performance and convenient preset modes, making it an ideal choice for smaller homes or apartments.
If you’re seeking the absolute best in performance and versatility, the premium Rinnai RX199iN Condensing Smart Sense Heater is in a class of its own, with the power and flexibility to handle any residential demand.
Your next step is to assess your home’s specific GPM needs and choose the model that aligns with your family’s demands and budget.
Ready to enjoy endless hot water? We recommend starting with our top pick: FOGATTI 7.5 GPM Indoor Heater.
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