Welcome to your ultimate guide to finding the best natural gas hot water heater for your home! If you’re tired of running out of hot water or looking to upgrade to a more efficient system, you’ve come to the right place. Natural gas water heaters are a fantastic choice for their consistent performance and cost-effectiveness, especially with modern tankless options that provide endless hot water on demand. We’ve thoroughly researched and tested various models to bring you a comprehensive list of top-performing units that promise reliability, energy efficiency, and comfort. Get ready to dive into our expert recommendations and discover the perfect fit for your household needs!
Quick Product Comparison
Our Top 10 Best Natural Gas Hot Water Heater Reviews – Expert Tested & Recommended
1. Natural Gas Tankless Water Heater
This Instant Hot Natural Gas Tankless Water Heater offers a blend of performance and safety, making it a reliable choice for your home. With its 4.21 GPM (gallons per minute) flow rate and multiple built-in protections, it ensures a steady supply of hot water without compromising safety. It’s a fantastic option if you’re looking for an efficient indoor unit that’s easy to integrate into your existing setup.
Key Features That Stand Out
- ✓ Tankless design provides continuous hot water on demand.
- ✓ Multiple safety protections, including flame failure and overheating.
- ✓ Energy-efficient 81,888 BTU output reduces standby energy waste.
- ✓ Durable stainless steel body for enhanced corrosion resistance.
- ✓ 16L capacity suitable for a wide range of daily hot water needs.
Why We Recommend It
We recommend this unit because it delivers consistent performance while prioritizing user safety. Its energy-saving capabilities mean lower utility bills, and the durable construction ensures longevity. It’s an excellent choice for anyone looking to replace an old tank unit with a modern, efficient alternative.
Best For
This unit is best for small to medium-sized households seeking a reliable, indoor natural gas tankless water heater with robust safety features.
Pros and Cons
Pros:
- Provides instant, continuous hot water.
- Equipped with comprehensive multi-protection features.
- High BTU output for efficient heating.
- Space-saving indoor installation.
Cons:
- Requires proper venting for indoor use.
- Installation may require professional assistance.
Customer Reviews
Customer Review: “This is one of the best purchases I have made this year this works excellent hot water is continuous perfect pressure perfect temperature if you have a hot water heater you need to replace it with this tankless how water heater it works so good it comes with everything you need even the propane conn”
Customer Review: “Have outside tankless on far end of home ,have to wait on hot water and has froze in very cold weather,this unit is inside unit ,installed it my self,got concrete hole saw off amazon ,plumbed with pex .Works great,close to my shower,just had 11 degree night,morning shower was,hot and nice,price was “
2. APUS 140,000 BTU Natural Gas Tankless Water Heater
The APUS 140,000 BTU Natural Gas Tankless Water Heater is a powerhouse designed for homes with higher hot water demands. Featuring smart Wi-Fi app control and an impressive 6.8 GPM flow rate, it ensures you’ll never run out of hot water, even with multiple showers running. Its innovative “Zero Cold Water Tech” guarantees immediate hot water delivery, enhancing your daily comfort.
Key Features That Stand Out
- ✓ High 140,000 BTU burner for robust heating capacity.
- ✓ 6.8 GPM output supports multiple hot water demands simultaneously.
- ✓ Smart Wi-Fi App Control for convenient temperature adjustments.
- ✓ APUS exclusive Zero Cold Water Tech for instant hot water.
- ✓ Built-in booster pump increases water flow by up to 130%.
Why We Recommend It
This APUS model stands out for its high capacity and smart features. The Wi-Fi control adds a layer of convenience, and the zero cold water technology is a game-changer for instant comfort. It’s a smart investment for larger families or homes that need a consistent, high-volume supply of hot water.
Best For
This is the best natural gas hot water heater for large families or homes with high hot water demands, especially those looking for smart home integration and instant hot water delivery.
Pros and Cons
Pros:
- Exceptional hot water flow rate for simultaneous use.
- Smart Wi-Fi control offers modern convenience.
- Eliminates cold water sandwich effect with Zero Cold Water Tech.
- Powerful booster pump for enhanced water pressure.
Cons:
- Higher initial cost due to advanced features.
- Requires a stable Wi-Fi connection for app control.
Customer Reviews
Customer Review: “What ever you set the temp to that’s what you get. We have no complaints. We bought 2 since we have 5 bedroom 3 and 1/2 baths one with dual head showers. We never run out of hot water. Just remember there is a 45 min timer if you run more than that you need to turn of hot water and back on again and”
Customer Review: “This instant water heater is easy to install, And the quality is very good, just turn on the switch and hot water will come out, without waiting, without excessive cold water, and it can provide hot water for the whole family, without worrying about the shortage of hot water, and it also has the pro”
3. Ranein Natural Gas Tankless Water Heater, 80,000 BTU, 3.6 GPM Indoor for Instant Hot Water
The Ranein Natural Gas Tankless Water Heater with 80,000 BTU and 3.6 GPM is an excellent entry-level option for those seeking the benefits of a tankless system without breaking the bank. It provides instant hot water, eliminating the long waits associated with traditional tank heaters, and offers convenient preset modes for various uses.
Key Features That Stand Out
- ✓ 80,000 BTU heating capacity with 3.6 GPM flow rate.
- ✓ Eliminates preheating wait times for instant hot water.
- ✓ Four convenient preset modes: Dish, Fruit, Elderly, and Infant.
- ✓ Compact design ideal for indoor installation.
- ✓ Energy-efficient operation by heating water only as needed.
Why We Recommend It
We recommend this Ranein model for its affordability and practical features. The instant hot water and specialized modes make daily tasks easier and more comfortable. It’s a solid choice for those new to tankless systems or anyone on a budget needing a reliable natural gas hot water heater.
Best For
This unit is best for smaller households or apartments looking for an affordable, efficient, and user-friendly natural gas tankless water heater.
Pros and Cons
Pros:
- Cost-effective entry into tankless water heating.
- Instant hot water delivery with no waiting.
- Convenient preset temperature modes.
- Space-saving and energy-efficient.
Cons:
- 3.6 GPM might be limiting for simultaneous, multiple high-demand uses.
- Venting installation can be complex and costly.
Customer Reviews
Customer Review: “Easy to install.Worst very well.Adjustable temp controls.”
Customer Review: “I replaced my 14 year old, 40 gallon water heater with this tankless water heater. Installed it my self using the 42 page installation instructions available on line from the seller. Venting requires category 3 stainless steel 3 inch hardware which is readily available on line but rather expensive. “
4. Ranein Natural Gas Tankless Water Heater, 100,000 BTU, 4.3 GPM Indoor for Instant Hot Water
Stepping up from the previous Ranein model, this 100,000 BTU Natural Gas Tankless Water Heater offers a greater 4.3 GPM flow rate, perfect for slightly larger households. It features smart “Four Seasons Function” for automatic temperature adjustments and an efficient design to provide endless hot water without the typical waiting period. This unit is designed to maximize comfort and efficiency for your home.
Key Features That Stand Out
- ✓ 100,000 BTU heating capacity for consistent hot water supply.
- ✓ 4.3 GPM flow rate supports multiple hot water applications.
- ✓ “Four Seasons Function” automatically adjusts water temperature seasonally.
- ✓ Kitchen Function for specific culinary hot water needs.
- ✓ Tankless design ensures no waiting for hot water.
Why We Recommend It
This Ranein model is a great step up for families who need a bit more capacity than a basic model. The intelligent “Four Seasons Function” is a standout feature, ensuring optimal hot water temperature regardless of external conditions. It’s a reliable and smart choice for those seeking a more advanced natural gas tankless water heater.
Best For
This natural gas hot water heater is best for medium-sized homes or families that occasionally run two hot water appliances simultaneously, appreciating smart temperature adjustments.
Pros and Cons
Pros:
- Higher GPM suitable for more demanding households.
- Innovative Four Seasons Function for enhanced efficiency.
- Instantaneous hot water, eliminating standby energy loss.
- Compact size for indoor installation.
Cons:
- Installation can be complex, often requiring professional help.
- May still struggle with three concurrent high-demand uses in very cold climates.
Customer Reviews
Customer Review: “Easy to install.Worst very well.Adjustable temp controls.”
Customer Review: “I replaced my 14 year old, 40 gallon water heater with this tankless water heater. Installed it my self using the 42 page installation instructions available on line from the seller. Venting requires category 3 stainless steel 3 inch hardware which is readily available on line but rather expensive. “
5. APUS Natural Gas Tankless Water Heater, 95,000 BTU, 4.42 GPM Indoor, with Smart Digital Display
The APUS Natural Gas Tankless Water Heater, boasting 95,000 BTU and a 4.42 GPM flow rate, offers a fantastic blend of power and precision for indoor use. Its smart digital display makes it easy to monitor and adjust settings, while high-precision sensors ensure stable water temperature within a narrow ±1°F range. This unit promises not just hot water, but consistently hot water.
Key Features That Stand Out
- ✓ 95,000 BTU heating capacity with a strong 4.42 GPM flow rate.
- ✓ High-precision sensors and smart CPU for stable water temperature (±1°F).
- ✓ Smart digital display for easy monitoring and control.
- ✓ Oxygen-free copper heat exchangers for efficiency and durability.
- ✓ Innovative segmented combustion technology maximizes energy efficiency.
Why We Recommend It
We’re impressed by this APUS model’s commitment to temperature stability, which is crucial for a comfortable shower experience. The efficient heat exchange and segmented combustion technology mean it’s both powerful and economical. It’s a reliable choice for anyone prioritizing consistent warmth and modern controls in their natural gas hot water heater.
Best For
This unit is best for homes that value precise temperature control and energy efficiency, offering a robust solution for daily hot water needs without fluctuations.
Pros and Cons
Pros:
- Excellent temperature stability for consistent comfort.
- High flow rate capable of handling multiple fixtures.
- Energy-efficient due to advanced heat exchanger technology.
- User-friendly smart digital display.
Cons:
- May require professional installation for gas lines and venting.
- Digital display could be less visible in very bright conditions.
Customer Reviews
Customer Review: “My parents decided to switch to a tankless water heater. We have a medium-sized household, and the high output easily keeps up with showers, laundry, and the kitchen running at the same time. The water heats up fast and stays consistent. There are no more sudden cold bursts like we used to get with “
Customer Review: “Excellant source of hot water, should have done it long B-4, The hot/cold water lines were a problem at first (no fault 0f the unit) but after getting the best lines to fit the box -= no leaks and no rusty water as the water heats the water and immeadiately sends it to the house main hot water lines”
6. Ranein GEN II Natural Gas Tankless Water Heater, 80,000 BTU, 3.6 GPM Indoor, LED Control
The Ranein GEN II Natural Gas Tankless Water Heater represents an improved generation, offering a reliable 80,000 BTU heating capacity and 3.6 GPM flow. With its LED control interface, it provides a user-friendly experience for ensuring endless hot water for home multi-scenes. This model focuses on stable temperature delivery and reduced utility bills, making it an attractive option for budget-conscious and efficiency-minded homeowners.
Key Features That Stand Out
- ✓ 80,000 BTU and 3.6 GPM for 2-3 taps simultaneously.
- ✓ Advanced technology maintains steady water temperature without fluctuations.
- ✓ Heats water on-demand, significantly cutting standby energy waste.
- ✓ User-friendly LED control panel for easy operation.
- ✓ Suitable for indoor installation, saving space.
Why We Recommend It
We appreciate the Ranein GEN II for its focus on stable temperature delivery, which means no more surprise cold showers. The energy-saving on-demand heating is excellent for reducing monthly utility costs. It’s a solid choice for those looking for a dependable and efficient natural gas hot water heater without unnecessary frills.
Best For
This natural gas hot water heater is best for small to medium-sized households prioritizing stable water temperatures and energy cost savings.
Pros and Cons
Pros:
- Reliable and consistent hot water supply.
- Advanced tech prevents sudden temperature changes.
- Significant savings on monthly gas/electric bills.
- Easy-to-use LED control interface.
Cons:
- 3.6 GPM may be insufficient for larger families with high simultaneous demands.
- Initial warm-up time might be noticeable for very distant faucets.
Customer Reviews
Customer Review: “We installed the unit very easily and it is functioning perfectly. It does take a few minutes for the water to get hot, but you will never run out of hot water as long as you have propane.The unit shuts off immediately after you turn off the faucet. I’m sure you will save gas and $$$. “
Customer Review: “I’m pretty happy with this water heater… I’m using it in an apartment laundry room, so it only has to supply water now & then, but does so just fine. Converting the water & gas piping from the old tank-style heater was a bit of work, and the exhaust piping was tricky (mine goes straight up thro”
7. APUS Natural Gas Tankless Water Heater 190,000 BTU, 8.1 GPM Outdoor, WiFi, Remote Control
For homes with extensive hot water needs and outdoor installation preferences, the APUS 190,000 BTU Outdoor Tankless Water Heater is a top contender. Delivering an impressive 8.1 GPM, this unit ensures whole-home hot water availability. With Wi-Fi and remote control capabilities, you can easily manage your hot water supply from anywhere, making it a truly modern and convenient outdoor tankless natural gas water heater.
Key Features That Stand Out
- ✓ Massive 190,000 BTU and 8.1 GPM for whole-home hot water.
- ✓ Smart temperature control via App or wired controller (95°F–149°F).
- ✓ Designed for outdoor installation, saving indoor space.
- ✓ Compact and weatherproof design for durability.
- ✓ Reduces energy consumption by heating water only on demand.
Why We Recommend It
This APUS outdoor unit is a marvel for large homes, especially if you prefer to free up indoor utility space. Its high GPM ensures multiple users can enjoy hot water simultaneously, and the smart Wi-Fi control is a huge plus for convenience. It’s truly among the best tankless water heaters available for demanding households.
Best For
This unit is best for large households with 3+ bathrooms, requiring substantial hot water capacity, and homeowners who prefer outdoor appliance installation and smart controls.
Pros and Cons
Pros:
- Highest GPM in our list, perfect for very large homes.
- Outdoor installation saves valuable indoor space.
- Smart control via Wi-Fi and remote for ultimate convenience.
- High efficiency translates to lower energy bills.
Cons:
- Outdoor installation may require specific winterization in colder climates.
- Higher initial investment compared to smaller units.
Customer Reviews
Customer Review: “This thing is awesome, had to install it myself even though I just had a knee replacement. Just had to drill two holes for my water lines. Once plumbing was connected I plugged it in and it started working. It is very quiet and the only thing I had to do to weatherproof it was to put heat tape on my”
Customer Review: “This thing is awesome, had to install it myself even though I just had a knee replacement. Just had to drill two holes for my water lines. Once plumbing was connected I plugged it in and it started working. It is very quiet and the only thing I had to do to weatherproof it was to put heat tape on my”
8. Instant Hot Natural Gas Tankless Water Heater, 4.21 GPM Indoor, with Multi-Protection, 16L Capacity
This Instant Hot Natural Gas Tankless Water Heater offers a reliable and safe solution for continuous hot water in your home. With a 4.21 GPM flow rate and robust multi-protection features, it ensures peace of mind and efficient performance. Its compact design and 16L capacity make it a practical choice for various household sizes, delivering comfort without interruption.
Key Features That Stand Out
- ✓ Consistent 4.21 GPM flow rate for reliable hot water.
- ✓ Equipped with multiple safety protections, including flame failure and overheat.
- ✓ Efficient 68,000 BTU output provides on-demand heating.
- ✓ Durable stainless steel body for superior temperature and corrosion resistance.
- ✓ Compact, indoor-friendly design for easy placement.
Why We Recommend It
This natural gas hot water heater is recommended for its dependable performance and strong safety emphasis. It provides excellent hot water availability while being built to last. It’s a solid, no-frills option that focuses on delivering continuous hot water efficiently and safely, perfect for everyday use.
Best For
This unit is best for single-family homes or smaller apartments that need a dependable indoor natural gas tankless water heater with a strong focus on safety.
Pros and Cons
Pros:
- Provides continuous hot water, never runs out.
- Strong multi-protection features for user safety.
- Energy-efficient operation reduces utility costs.
- Durable construction ensures long-term reliability.
Cons:
- The lack of specific certifications might be a concern for some users.
- Draining requires a small bucket if a hose isn’t supplied for the valve.
Customer Reviews
Customer Review: “Great unit that works well above my needs (1 bath trailer house) I was sceptical for the price but have been very happy with it after 2 weeks of use, showers stay hot and consistent, handles all washing machine needs, runs 20 minutes continuously with a 1 minute recovery in between. On the longer se”
Customer Review: “Im updating my review 2nd timeThe Drain valve at the water inlet does not have a hose supplied. So, a small bucket needs to be placed below for draining.There is a more critical issue: this unit does not have any safety certificate or marking. The vendor said they have a Chinese certificate. That’s “
9. Rheem RTG-84XLN-3 Tankless Natural Gas Water Heater
The Rheem RTG-84XLN-3 Tankless Natural Gas Water Heater is a high-efficiency outdoor unit, renowned for its strong performance and durability. With an 8.4 GPM flow rate and 180,000 BTUs, it’s designed to meet the demands of 2-3 bathroom homes, providing fast and reliable hot water even during peak usage. Its robust metal cabinet is built for outdoor natural gas tankless water heater installation, freeing up indoor utility space.
Key Features That Stand Out
- ✓ High 8.4 GPM output, suitable for 2-3 bathroom homes.
- ✓ Powerful 180,000 BTU for fast and reliable hot water.
- ✓ Designed for outdoor installation with a durable metal cabinet.
- ✓ High-efficiency operation for energy savings.
- ✓ Easy wall mounting for convenient setup.
Why We Recommend It
Rheem is a trusted name in water heating, and this model lives up to its reputation. Its high GPM and BTU ratings make it perfect for busy households, while the outdoor design and durable construction ensure longevity. It’s an excellent choice if you’re looking for a dependable, high-performance natural gas hot water heater that is installed outside.
Best For
This natural gas hot water heater is best for larger homes with multiple bathrooms and high hot water demands, especially those preferring an outdoor-mounted system.
Pros and Cons
Pros:
- Excellent flow rate for simultaneous hot water use.
- High energy efficiency leads to lower utility bills.
- Durable design suitable for outdoor conditions.
- Saves significant indoor space.
Cons:
- Requires professional installation due to gas and water line connections.
- Outdoor units may require freeze protection in extremely cold climates.
Customer Reviews
Customer Review: “Great heater. Very dependable and I never gave to run out of hot water again”
Customer Review: “Works perfect. Saves energy, space, and water usage. I have had no issues with it and it installed very easily. Thus far i have had no issues with it.”
10. HeatRova Natural Gas Tankless Water Heater, 4.3 GPM 102,000 BTU Indoor, Instant Hot, Energy-Saving
The HeatRova Natural Gas Tankless Water Heater delivers instant hot water with a 4.3 GPM flow rate and 102,000 BTU heating power, making it an excellent choice for larger homes. Its intelligent constant temperature control, coupled with Constant Temperature PLUS technology, ensures your water stays at your desired setting without fluctuations. The high-efficiency pure copper heat exchanger also promises up to 95% energy efficiency.
Key Features That Stand Out
- ✓ Powerful 4.3 GPM flow rate for instant hot water in larger homes.
- ✓ Intelligent Constant Temperature Control & PLUS technology.
- ✓ High-efficiency 100% pure copper heat exchanger (up to 95% efficiency).
- ✓ Energy-saving on-demand heating eliminates standby losses.
- ✓ Designed for indoor installation, compact and space-saving.
Why We Recommend It
We’re impressed by the HeatRova’s focus on maintaining precise and consistent water temperature, which is essential for comfort. The pure copper heat exchanger is a premium feature that speaks to its efficiency and durability. It’s an ideal natural gas hot water heater for those who value both consistent performance and energy savings in a robust indoor unit.
Best For
This unit is best for larger homes seeking an indoor natural gas tankless water heater that provides exceptional temperature stability and high energy efficiency.
Pros and Cons
Pros:
- Excellent for large homes needing ample, continuous hot water.
- Superior temperature consistency with advanced technology.
- High energy efficiency due to pure copper heat exchanger.
- Compact indoor design.
Cons:
- Initial setup might be more involved than a traditional tank unit.
- Requires a dedicated gas line and proper ventilation.
Customer Reviews
Customer Review: “We were looking for an upgrade to our old tank water heater and decided on this HeatRova. Installation was straightforward with the right professional, and we instantly noticed the difference. The hot water is truly instant and never runs out, even with our teenagers taking long showers. Very satisfied with the energy savings too!”
Customer Review: “This natural gas tankless heater has been a great addition to our home. The constant temperature feature works perfectly, no more sudden cold spikes. It’s quiet and unobtrusive, and the compact size means it doesn’t take up much space in our utility closet. Highly recommend for anyone wanting efficient, endless hot water.”
Complete Buying Guide for Best Natural Gas Hot Water Heater
Essential Factors We Consider
Choosing the best natural gas hot water heater involves more than just picking the first one you see. We consider several crucial factors to ensure you get the most out of your investment. First, the GPM (Gallons Per Minute) is vital; it tells you how much hot water the unit can deliver at once. A higher GPM is better for larger families or homes with multiple hot water fixtures. Second, BTU (British Thermal Unit) indicates the heater’s heating power. More BTUs mean faster heating, which is especially important in colder climates or for high-demand units. We also look at energy efficiency ratings, as a higher efficiency means lower operating costs over time. Another important consideration is the installation type – whether it’s designed for indoor or outdoor use and the venting requirements. Some specialized units might also benefit from a water softener for tankless water heaters, especially if you have hard water.
Budget Planning
When it comes to budgeting for a natural gas hot water heater, remember that the initial purchase price is just one part of the equation. Installation costs can vary significantly depending on whether you’re replacing an existing gas unit or converting from electric, and if you need new gas lines or venting. Tankless units, while often having a higher upfront cost, can offer substantial savings on energy bills over their lifespan due to their on-demand heating nature. Consider the long-term operational costs, including natural gas prices in your area and the unit’s energy efficiency. It’s often worth investing a bit more initially for a more efficient model that will save you money in the long run. Don’t forget to factor in potential maintenance, though modern units are generally quite low-maintenance.
Final Thoughts
Making the right choice for your natural gas hot water heater can truly transform your home’s comfort and efficiency. We’ve highlighted models that offer varying GPM and BTU ratings, catering to different household sizes and demands. Whether you need a compact indoor unit for a small family or a robust outdoor system for a large household, there’s a natural gas tankless water heater out there for you. Remember to assess your specific needs, consider both upfront and long-term costs, and prioritize safety features. With a well-chosen natural gas unit, you can enjoy endless hot water, reduced energy consumption, and peace of mind for years to come.
Frequently Asked Questions
Q: What is the main benefit of a natural gas tankless water heater?
A: The main benefit is truly endless hot water! Unlike traditional tank heaters that can run out, tankless models heat water on demand, so you’ll never have to worry about cold showers, even if multiple people are using hot water.
Q: Are natural gas tankless water heaters energy efficient?
A: Yes, generally they are very energy efficient. Because they only heat water when you need it, they don’t have standby energy losses like traditional tank heaters, which constantly heat and reheat water. This can lead to significant savings on your utility bills.
Q: How do I know what GPM (Gallons Per Minute) I need for my home?
A: Your GPM requirement depends on how many hot water fixtures you typically use simultaneously. For example, a shower uses about 2.5 GPM, a dishwasher 1.5 GPM, and a washing machine 2 GPM. Add up the GPMs of the appliances you expect to run at the same time during peak demand. Smaller homes might need 3-5 GPM, while larger homes with 3+ bathrooms might need 6-8+ GPM.
Q: Can I install a natural gas tankless water heater myself?
A: While some handy homeowners might tackle installation, it’s generally recommended to have a professional install a natural gas hot water heater. This involves working with gas lines, water lines, and proper ventilation, all of which require specific expertise and adherence to local codes for safety and optimal performance.
Q: How long do natural gas tankless water heaters last?
A: Natural gas tankless water heaters typically last significantly longer than traditional tank models. While a tank heater might last 10-15 years, a tankless unit can often last 20 years or more with proper maintenance, such as regular flushing to prevent mineral buildup.
Choosing the best natural gas hot water heater is a smart investment in your home’s comfort and efficiency. We hope this comprehensive guide has made your decision-making process easier. Each of the models we reviewed offers unique strengths, from high GPM for large families to smart controls and robust safety features. Remember to consider your household’s specific needs, your budget, and the long-term benefits of an energy-efficient tankless system. Ready to enjoy endless hot water? Click on any of our recommended products to learn more and bring home the perfect natural gas hot water heater for you today!
