Thinking about upgrading your home’s hot water situation? If you're tired of lukewarm showers or lengthy waits for enough hot water, a new best gas hot water heater might be exactly what you need. I’ve spent weeks digging into the latest models, considering flow rates, energy efficiency, and user feedback to help you find the perfect fit.
After comparing dozens of options, the APUS Tankless Water Heater Propane Gas stands out for its robust performance and smart features. It’s a solid choice for many homes, but there are other excellent options depending on your specific needs and setup. Let’s dive into the details so you can make an informed decision.
Comparison Chart of Best Gas Hot Water Heater
List of Top 10 Best Best Gas Hot Water Heater
We looked for models that offer consistent performance, reliable energy efficiency, and straightforward installation. Key factors included gallons per minute (GPM) for flow rate, BTU output for heating power, and user reviews regarding ease of use and durability.
Below are the list of products:
1. APUS Tankless Water Heater Propane Gas
In our research, the APUS Tankless Water Heater Propane Gas consistently impressed with its ability to deliver hot water on demand for multiple fixtures simultaneously. It's designed for efficient propane use, making it a strong contender for off-grid or areas where natural gas isn't readily available.
1. APUS Tankless Water Heater Propane Gas
This unit is a solid performer for those seeking an efficient propane-powered hot water solution. Its smart digital display offers intuitive control, and aggregate user feedback highlights its reliability.
Why I picked it
This model is a standout for its efficient propane usage and the convenience of on-demand hot water. It's designed for easy indoor installation and offers a modern digital display for effortless temperature control.
Key specs
- Fuel Type: Propane Gas
- Max Flow Rate: 4.42 GPM
- BTU Output: 95,000 BTU
- Display: Smart Digital Display
- Installation: Indoor
- Color: Space Gray
Real-world experience
Users report that this unit effectively handles simultaneous use for multiple bathrooms, providing a consistent hot water supply without the long waits associated with traditional tank heaters. It's particularly well-suited for homes that require a robust propane solution.
Trade-offs
Some users note that the initial setup may require professional plumbing and gas line expertise. Additionally, for very high-demand situations with many simultaneous water uses, a larger BTU unit might be preferred.
2. Tankless Water Heater Novieex Demand Natural
The Novieex Demand Natural Gas Tankless Water Heater is a great option if you have natural gas available. It's built for efficiency and provides ample hot water for family use, supporting multiple points of use throughout the home.
2. Tankless Water Heater Novieex Demand Natural
This unit focuses on delivering instant hot water efficiently, making it ideal for busy households. Its design supports between 2 to 4 simultaneous uses, ensuring everyone gets warm water when they need it.
Why I picked it
The Novieex unit is a top pick for its impressive flow rate and heating capacity, making it suitable for larger households or those with multiple high-demand appliances. Its natural gas operation is also a plus for many homes.
Key specs
- Fuel Type: Natural Gas
- Max Flow Rate: 4.3 GPM
- BTU Output: 100,000 BTU
- Display: LED Display
- Installation: Indoor
- Use: 2-4 Point Use
Real-world experience
Verified buyer feedback indicates this heater provides a consistent and powerful stream of hot water, even when multiple showers or appliances are running. Its efficiency in delivering hot water quickly is often praised.
Trade-offs
This model is designed for indoor installation, so if you need an outdoor unit, you'll need to look elsewhere. Some users might find the installation process complex if they aren't experienced with gas appliance hookups.
3. APUS 190 000 BTU Outdoor Tankless
For those needing a high-capacity, outdoor-friendly option, the APUS 190,000 BTU Outdoor Tankless Water Heater is a compelling choice. It boasts significant heating power and smart features like WiFi and remote control for added convenience.
3. APUS 190 000 BTU Outdoor Tankless
This unit is engineered for high-volume hot water delivery, supporting up to five outlets simultaneously. Its outdoor design makes it versatile for various installation scenarios, and the WiFi connectivity is a modern touch.
Why I picked it
This APUS model stands out for its impressive BTU output and flow rate, capable of supplying hot water to multiple fixtures at once. The inclusion of WiFi and a remote control adds a layer of convenience and modern control.
Key specs
- Fuel Type: Natural Gas
- Max Flow Rate: 8.1 GPM
- BTU Output: 190,000 BTU
- Features: WiFi & Remote Control
- Installation: Outdoor
- Capacity: Supports 5 Outlets
Real-world experience
Aggregate user reviews often mention its exceptional performance for large homes or properties with high hot water demands, such as multiple bathrooms or frequent appliance use. The outdoor installation capability also frees up indoor space.
Trade-offs
Its high BTU output means it requires a significant natural gas supply, so ensure your existing lines can accommodate it. The outdoor installation might also depend on your climate and local building codes.
4. Natural Gas Tankless Water Heater
This Natural Gas Tankless Water Heater offers a strong flow rate for its class, delivering consistent hot water for 2 to 4 points of use. It’s an intuitive unit with a clear digital display and robust safety features.
4. Natural Gas Tankless Water Heater
Designed for indoor installation, this heater provides continuous hot water without the energy waste of traditional tanks. Its "zero cold water" technology ensures you won't experience unexpected bursts of cold.
Why I picked it
This natural gas model offers a very respectable flow rate for simultaneous use and its "zero cold water" technology means a more consistent hot water experience, which is a great feature for daily comfort.
Key specs
- Fuel Type: Natural Gas
- Max Flow Rate: 4.74 GPM
- BTU Output: 18L (equivalent to approx. 100,000 BTU)
- Display: Fahrenheit Digital Display
- Installation: Indoor
- Features: Multi-Protection, Zero Cold Water Technology
Real-world experience
According to aggregate buyer feedback, this unit is efficient at maintaining set temperatures even with fluctuating demand, providing a reliable supply for showers, sinks, and dishwashers. Its compact size is also noted as a benefit for indoor installations.
Trade-offs
While it supports multiple points of use, households with extremely high simultaneous demand (like running several showers and a washing machine at once) might find its capacity slightly limited compared to larger, higher-BTU units.
5. Rheem RTG-70XLN-3 High Efficiency Non-Condensing Outdoor
Rheem is a well-known name in water heaters, and their RTG-70XLN-3 model is a high-efficiency, non-condensing outdoor unit. It provides a good flow rate and is designed for reliable performance in various weather conditions.
5. Rheem RTG-70XLN-3 High Efficiency Non-Condensing Outdoor
This unit offers a balance of high efficiency and robust performance, making it a smart choice for many homeowners. Its outdoor placement is ideal for saving indoor space and can simplify venting requirements.
Why I picked it
Rheem's reputation for quality and reliability is a major factor, and this model delivers on high efficiency with a solid flow rate, suitable for moderate to high hot water needs in a family setting.
Key specs
- Fuel Type: Natural Gas
- Max Flow Rate: 7.0 GPM
- Efficiency: High Efficiency Non-Condensing
- Installation: Outdoor
- Color: Gray
Real-world experience
Aggregate user reviews suggest this unit performs reliably, offering a consistent hot water supply for homes with multiple bathrooms. Its non-condensing design is straightforward and often preferred for its simplicity.
Trade-offs
Being an outdoor unit, it requires outdoor installation space and protection from extreme elements, which might not be feasible for all homes. The non-condensing nature means it's slightly less efficient than condensing models, though still a significant upgrade for many.
6. APUS Natural Gas Tankless Water Heater
The APUS Natural Gas Tankless Water Heater is another strong contender for homes with natural gas. It offers a good flow rate and features smart Wi-Fi app control, allowing you to manage your hot water from your phone.
6. APUS Natural Gas Tankless Water Heater
This unit is designed for indoor installation and promises a "zero cold water" experience, meaning no temperature drops when you switch between fixtures. Its ample flow rate is ideal for handling up to 6.8 GPM.
Why I picked it
The smart Wi-Fi control is a significant convenience factor, allowing remote operation and monitoring. Coupled with its high flow rate and energy-saving design, it's a modern and efficient choice for natural gas users.
Key specs
- Fuel Type: Natural Gas
- Max Flow Rate: 6.8 GPM
- BTU Output: 140,000 BTU
- Features: Smart Wi-Fi App Control, Zero Cold Water Technology
- Installation: Indoor
Real-world experience
Users who have installed this unit frequently praise its ability to maintain a consistent temperature and its responsiveness. The app control is often highlighted as a user-friendly feature that enhances the overall experience.
Trade-offs
The need for professional installation, especially for connecting the gas line and potentially the Wi-Fi setup, is a common consideration. Some users may also find the app interface requires a slight learning curve.
7. Ranein Propane Gas Tankless Water Heater
If you're looking for a propane option for smaller-scale needs, the Ranein Propane Gas Tankless Water Heater is a compact and efficient choice. It delivers instant hot water for 1 to 2 points of use.
7. Ranein Propane Gas Tankless Water Heater
This unit is designed for indoor installation and focuses on providing reliable on-demand hot water without the energy waste of traditional storage tank systems. Its 80,000 BTU output is suitable for basic household needs.
Why I picked it
This propane unit is a good choice for smaller homes, apartments, or RVs where space and propane usage are key considerations. It offers dependable on-demand hot water for basic needs like showering and sink use.
Key specs
- Fuel Type: Propane Gas
- Max Flow Rate: 3.6 GPM
- BTU Output: 80,000 BTU
- Installation: Indoor
- Capacity: 1-2 Points of Use
Real-world experience
User feedback indicates this heater performs well for its intended purpose, consistently providing hot water for single or dual-use scenarios. It’s noted for its compact size, making it easy to fit into tight spaces.
Trade-offs
Its lower BTU output means it's not designed for high-demand situations with multiple simultaneous uses. If you have a large family or need to run several appliances at once, a higher-capacity unit would be more appropriate.
8. Propane Tankless Water Heater
Similar to the Ranein model, this Propane Tankless Water Heater is designed for indoor installation and provides instant hot water. It features multiple safety protections and a digital display for easy temperature monitoring.
8. Propane Tankless Water Heater
This unit efficiently heats water on demand, reducing energy waste and standby heat loss common with tank heaters. Its 4.21 GPM flow rate is suitable for several simultaneous uses in a smaller home.
Why I picked it
This propane heater offers a good balance of flow rate and efficiency for its size, making it a versatile choice for various smaller living spaces. The built-in safety features provide peace of mind.
Key specs
- Fuel Type: Propane Gas
- Max Flow Rate: 4.21 GPM
- BTU Output: 16L (equivalent to approx. 90,000 BTU)
- Display: Fahrenheit Digital Display
- Installation: Indoor
- Features: Multi-Protection
Real-world experience
Verified buyer feedback suggests this unit is effective at providing continuous hot water for typical domestic use, such as two showers running concurrently or a shower and dishwasher. Its fast heating performance is also frequently mentioned.
Trade-offs
Similar to other units in this flow rate class, it might struggle if you have very high simultaneous hot water demands or require water at extremely high temperatures for specialized tasks.
9. Natural Gas Tankless Water Heater
This Natural Gas Tankless Water Heater is designed for consistent performance, offering a solid flow rate suitable for multiple applications. It includes multi-protection features and a clean design for indoor installation.
9. Natural Gas Tankless Water Heater
It provides continuous hot water, eliminating the risk of running out mid-shower. The 4.21 GPM flow rate ensures comfort for typical household needs.
Why I picked it
This model provides a good compromise for households that need more than a minimal flow rate but don't require the highest capacity available. Its built-in protections are a positive safety aspect.
Key specs
- Fuel Type: Natural Gas
- Max Flow Rate: 4.21 GPM
- BTU Output: 16L (equivalent to approx. 90,000 BTU)
- Installation: Indoor
- Features: Multi-Protection, Constant Temperature
Real-world experience
Aggregate user reports indicate this heater effectively delivers hot water for everyday tasks, such as running a washing machine while someone showers. The constant temperature feature is often praised.
Trade-offs
As with many units delivering around 4 GPM, it can be strained by extremely high simultaneous demand. Ensuring your gas line has sufficient pressure and BTU capacity is crucial for optimal performance.
10. Propane Gas Tankless Water Heater Indoor
The HeatRova Propane Gas Tankless Water Heater is designed for indoor use and offers a good balance of flow rate and energy efficiency. It features a pure copper heat exchanger and an energy-saving design.
10. Propane Gas Tankless Water Heater Indoor
This unit is rated for 4.3 GPM and 102,000 BTU, capable of serving 3-4 fixtures. Its focus on a pure copper heat exchanger suggests good heat transfer and durability.
Why I picked it
The inclusion of a pure copper heat exchanger is a notable feature, as copper is excellent at transferring heat efficiently. This, combined with its flow rate, makes it a capable propane unit for moderate household needs.
Key specs
- Fuel Type: Propane Gas
- Max Flow Rate: 4.3 GPM
- BTU Output: 102,000 BTU
- Heat Exchanger: Pure Copper
- Installation: Indoor
- Capacity: 3, 4 Fixtures
Real-world experience
Users report that this unit delivers hot water reliably for everyday tasks, supporting simultaneous use of a shower and sink, for example. The energy-saving aspect is often appreciated by those looking to reduce utility bills.
Trade-offs
While it handles 3-4 fixtures well, very high demand situations, like multiple showers running at full blast simultaneously, might tax its capacity. Professional installation is recommended to ensure proper venting and gas connections.
How I picked
When I was diving into the world of gas hot water heaters, I knew I needed to look beyond just the specs on paper. My process involved a deep dive into user feedback, manufacturer claims, and understanding the practical implications of different technologies. I evaluated each unit based on several key criteria.
First, I focused on the flow rate (GPM) and BTU output. These are the core indicators of how much hot water a unit can provide and how quickly it can heat it. I cross-referenced GPM ratings with the number of fixtures a unit is supposed to support, looking for consistency. For BTU output, I considered how that translates to performance in real-world scenarios, especially in colder climates where incoming water is colder.
Next, I paid close attention to energy efficiency and fuel type (propane vs. natural gas). While the question is about gas water heaters, the efficiency ratings and how well a unit recovers after heavy use are critical for long-term cost savings. I also looked into the installation type (indoor vs. outdoor) and any specific venting requirements, as this greatly impacts practicality for different homes.
Finally, I scoured verified buyer reviews and aggregate user feedback. This is where you find out how a unit actually performs beyond the marketing. I looked for recurring praise regarding reliability, ease of use, temperature consistency, and common complaints about things like noise, installation difficulties, or premature failure. I intentionally didn't test long-term durability beyond what average users would experience within the typical warranty period.
Buying guide — what actually matters for best gas hot water heater
Deciding on the right gas hot water heater can feel like a big step, but breaking it down makes it much simpler. It's all about matching the heater's capabilities to your household's needs and your home’s setup.
Flow Rate (GPM) and BTU Output: The Powerhouse Duo
This is probably the most crucial part. The gallons per minute (GPM) tells you how much hot water the heater can deliver at one time. A higher GPM means you can run more fixtures (like showers, sinks, or dishwashers) simultaneously without a drop in temperature. BTU (British Thermal Unit) output is essentially the heating power; a higher BTU means the water heats up faster and can maintain a higher temperature, especially important with colder incoming water.
- For 1-2 people or small apartments, a unit around 2-3 GPM (and possibly 60,000-80,000 BTU) might suffice.
- For a family of 3-4, aim for 4-5 GPM (around 90,000-100,000 BTU).
- Larger homes or those with high demand (multiple bathrooms, soaking tubs) should look at 5+ GPM (120,000+ BTU).
Fuel Type: Natural Gas vs. Propane
Your choice here usually depends on what’s available to your home. Natural gas is often more readily available in urban and suburban areas and is typically less expensive per unit of energy. Propane is a good alternative for rural areas or homes not connected to a natural gas line, but it generally costs more and requires a storage tank on your property.
Tankless vs. Traditional Tank Heaters
You're looking at tankless models here, and for good reason. Tankless heaters provide hot water on demand, meaning they only heat water as you need it. This is incredibly energy-efficient because you're not constantly heating and reheating water in a large tank. It also means you won't run out of hot water, which is a common frustration with traditional tank heaters.
Installation Location: Indoor vs. Outdoor
Where you install the heater matters. Indoor units are convenient for accessibility but require proper venting to the outside. Outdoor units save valuable indoor space and can simplify venting. Consider your climate; extreme cold can affect outdoor unit performance and durability.
Also, check local building codes for any restrictions on placement or venting.
Energy Efficiency Ratings and Certifications
Look for ENERGY STAR certified models if possible, as they meet strict energy performance standards set by the EPA. While not all gas tankless heaters carry this label, manufacturers often provide efficiency ratings or specify energy-saving features. Higher efficiency means lower operating costs over the life of the unit.
Additional Features: What Else to Consider?
- Digital Displays & Controls: These make it easy to set and monitor the water temperature. Some even offer smart controls via Wi-Fi for app-based management.
- Temperature Control Consistency: Features like "zero cold water" technology or continuous temperature adjustment ensure a more comfortable experience by minimizing temperature fluctuations.
- Noise Levels: Some tankless heaters can be noisier than traditional ones, so check reviews if this is a concern for you.
- Warranty: A good warranty, typically from 5 to 12 years on parts and the heat exchanger, indicates manufacturer confidence in the product’s longevity.
Frequently Asked Questions (FAQ)
Is a tankless gas water heater worth it for a small apartment?
Yes, a tankless gas water heater can definitely be worth it for a small apartment, especially if you have natural gas available. Even though your hot water demand might be lower, tankless heaters offer significant energy savings compared to traditional tank units because they only heat water when you need it. This can lead to lower utility bills, and you'll never have to worry about running out of hot water during a shower. Make sure to choose a model with a GPM and BTU output appropriate for your apartment’s usage.
How does a gas tankless water heater handle colder climates?
In colder climates, the incoming water temperature is lower, which means the gas tankless water heater has to work harder to heat the water to your desired temperature. This can sometimes affect the maximum GPM the unit can deliver. Look for models specifically designed or rated for colder climates, often indicated by a higher BTU output or specific performance data in low-temperature conditions. Some units might also require a dedicated exhaust vent for efficiency and safety.
What is the typical lifespan of a gas tankless water heater?
Gas tankless water heaters generally have a longer lifespan than traditional tank heaters. With proper maintenance, which typically includes annual flushing to prevent mineral buildup, a tankless unit can last anywhere from 15 to 20 years, or even longer. The heat exchanger, often the most critical component, is usually covered by a longer warranty, often around 10-12 years. Regular maintenance is key to maximizing its lifespan and performance.
Are gas tankless water heaters more expensive to install?
The initial installation cost for a gas tankless water heater is often higher than for a traditional tank heater. This is because they may require upgrades to your home’s gas lines to handle the higher BTU input needed for on-demand heating, as well as specialized venting systems. If you’re switching from a tank unit, you might need to run new gas lines, upgrade your electrical wiring for ignition and controls, and install a new vent. However, the long-term energy savings can offset this initial investment over time.
Can I use a propane tankless water heater indoors?
Yes, many propane tankless water heaters are designed for indoor installation, but it's crucial to ensure proper venting. These units produce combustion byproducts that must be safely exhausted outside your home. Typically, they require a direct vent system that uses an external air intake and exhausts fumes through a sealed pipe system. Always consult the manufacturer’s installation manual and follow local building codes and regulations for safe indoor venting.
Professional installation is highly recommended.
Final verdict
For a truly outstanding experience, the APUS Tankless Water Heater Propane Gas earns our Editor's Choice. It offers a robust flow rate and smart features that make it a top performer for delivering hot water on demand.
If you're looking for a reliable natural gas option and want a unit that can handle significant demand, the Tankless Water Heater Novieex Demand Natural is an excellent Top Pick, providing consistent hot water for busy households.
For budget-conscious buyers who need a powerful outdoor solution, the APUS 190 000 BTU Outdoor Tankless provides impressive capacity and modern convenience without breaking the bank.
Affiliate disclosure: This post contains affiliate links. If you buy through one of these links, I may earn a small commission at no extra cost to you. It never changes my recommendation, I only suggest gear I'd actually buy myself.
