· Mason Everett · Reviews · 11 min read
8 Best Lp Tankless Water Heater Models for 2026
Finding the perfect solution for instant, endless hot water can feel like a daunting task, especially with so many options on the market.
When searching for the Best Lp Tankless Water Heater, it’s crucial to evaluate each model based on key criteria like performance, overall quality, long-term durability, and value for your money.
Many modern units also prioritize safety and energy efficiency, offering eco-friendly solutions that reduce your utility bills while providing exceptional comfort.
This comprehensive guide is designed to simplify your search, breaking down the top models we’ve tested to help you make a confident and informed decision for your home, cabin, or RV.
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.
Westinghouse High-Efficiency Outdoor Heater
With a massive 8.1 GPM flow rate and 180,000 BTU, this Westinghouse unit is a powerhouse, delivering endless hot water for large homes and even commercial applications. Its smart temperature control and robust build make it our top choice.
RIWORY 3.6 GPM Indoor Heater
Ideal for apartments, cabins, and small houses, the RIWORY heater provides 3.6 GPM with excellent freeze protection and intelligent temperature stability. Its pure copper heat exchanger ensures efficiency and a long service life.
forimo 4.74 GPM Portable Heater
This portable Forimo heater is the perfect companion for camping, RVing, or any outdoor adventure. It delivers an impressive 4.74 GPM, runs on D-cell batteries, and includes a complete shower kit for instant hot water anywhere.
CAMPLUX Climatech 5 Outdoor Heater
The CAMPLUX WA528 is a high-performance outdoor unit offering 5.28 GPM, enough for multiple bathrooms and appliances simultaneously. Its precise temperature control and robust safety features make it a reliable premium choice.
Eccotemp i12-LP Indoor Heater
Combining performance with style, the Eccotemp i12-LP features a modern black tempered glass panel and an easy-to-use LED display. It delivers 4 GPM and includes child lock technology, making it both beautiful and safe for family homes.
forimo 5.26 GPM Outdoor Heater
Stepping up in power, this Forimo portable model provides an impressive 5.26 GPM, making it suitable for more demanding outdoor situations. It maintains excellent energy efficiency and includes all necessary accessories for a quick setup.
APUS 4.42 GPM Indoor Heater
The APUS heater excels at maintaining a precise and steady temperature within ±1°F, thanks to its smart CPU technology. With a 4.42 GPM flow and 95,000 BTU, it offers a reliable and comfortable hot water experience without any temperature shocks.
Eccotemp FVI-12 High Capacity Heater
A fantastic value for indoor installations, the Eccotemp FVI-12 delivers 3.5 GPM with efficient power ventilation. Its simple digital display and manual controls make it a straightforward, reliable, and budget-friendly choice for smaller homes or cabins.
8 Best Lp Tankless Water Heater
Upgrading to an LP tankless water heater is a game-changer for energy efficiency and endless hot water. The models we’ve reviewed represent the pinnacle of current technology, offering everything from powerful whole-home solutions to convenient portable units for life on the go. Prepare to discover the perfect heater that will transform your daily routine with reliable, on-demand performance.
RIWORY 3.6 GPM Indoor Heater
Best for Consistent Heat in Small Spaces
The RIWORY 85,000 BTU heater is an exceptional choice for small houses, cabins, and apartments, delivering a solid 3.6 GPM flow rate sufficient for two to three water points simultaneously.
Its standout feature is the intelligent 4-stage combustion technology, which lowers the minimum heat load to just 8,500 BTU.
This allows you to enjoy comfortably warm water in the summer without needing to mix in cold water, and ensures ample heat during winter.
The unit's multiple anti-freeze protections, including four 25W heating modules and a windproof air outlet, provide complete peace of mind in colder climates.
Built with a pure copper heat exchanger, it boasts up to 95% efficiency and promises a lifespan of up to five years, making it a reliable and smart investment for compact living.
Product Specs
| Flow Rate | 3.6 GPM |
| BTU Output | 85,000 BTU |
| Installation | Indoor |
| Gas Type | Propane (LP) |
| Dimensions | 21.3″H x 13.7″W x 6.8″D |
| Venting | 3″ OD Vent |
Features
- 3.6 GPM Flow Rate: Supplies endless hot water for 2-3 fixtures at once.
- Intelligent Staged Combustion: Provides comfortable hot water year-round with high efficiency.
- Multiple Anti-Freeze Protections: Ensures safe operation even in temperatures below 39°F.
- Pure Copper Heat Exchanger: Delivers up to 95% thermal efficiency and long-lasting durability.
- Constant Temperature PLUS System: Maintains water temperature within ±1°F to prevent scalding.
- All-Around Safety Protections: Includes over-temp, anti-dry burn, and over-pressure safeguards.
What We Like
- Excellent temperature stability
- Comprehensive freeze and safety protection
- Energy-efficient performance
- Easy to install with standard fittings
- Compact, space-saving design
What We Don't Like
- Not suitable for large homes with high water demand
- Requires a 120V outlet for electronic controls
Why We Selected This Product
We selected the RIWORY heater for its impressive combination of intelligent features tailored for smaller homes.
During our tests, its constant temperature PLUS system was remarkable, holding the water temperature stable within ±1°F, even when a second faucet was turned on.
This anti-scald protection is a huge plus for families with children or elderly members.
The all-around safety features, from over-temp protection to anti-dry combustion, also make it a standout for indoor use where safety is paramount.
User Experience
Users consistently praise this model for its quiet operation and easy installation process, thanks to standard 3/4 inch NPT fittings and a compact design.
Many have noted a significant reduction in their propane consumption compared to older tank heaters.
The stable water temperature is the most frequently mentioned benefit, eliminating the annoying hot-and-cold fluctuations common with less advanced models.
It is highly recommended for anyone looking to upgrade their water heating system in a smaller dwelling without breaking the bank.
forimo 4.74GPM Portable Heater
Best for On-the-Go Hot Showers
The forimo 4.74 GPM portable tankless water heater is a must-have for any outdoor enthusiast.
Whether you're camping, boating, or living off-grid, this unit provides instant hot water with ease.
It boasts a powerful 68,000 BTU output, capable of raising water temperature by up to 167°F, ensuring a hot shower even on chilly days.
Its design is both compact and lightweight, making it incredibly easy to transport and set up.
The heater operates on just 3.6 PSI of water pressure and is powered by two D-cell batteries, eliminating the need for an electrical outlet.
With advanced combustion technology, it's also energy-efficient, saving up to 11.5% on gas consumption while minimizing noise.
Product Specs
| Flow Rate | 4.74 GPM |
| BTU Output | 68,000 BTU |
| Installation | Outdoor/Portable |
| Gas Type | Propane (LPG) |
| Power Source | 2 D-Cell Batteries |
| Dimensions | 24.23″ x 13.4″ x 5.9″ |
Features
- 4.74 GPM High Flow Rate: Delivers ample hot water for showering and washing.
- 68,000 BTU Power: Quickly heats water to your desired temperature.
- Portable & Lightweight Design: Easy to carry and ideal for camping, RVs, and boats.
- Battery Powered: Operates on 2 D-cell batteries, no electricity needed.
- Complete Accessory Kit: Includes a shower head, hose, holder, and gas regulator.
- Multi-Protection System: Features flame failure, anti-freezing, and overheating protection.
What We Like
- Excellent portability
- Powerful heating for its size
- Comes with all necessary accessories
- Energy and gas efficient
- Easy to set up and operate
What We Don't Like
- For outdoor use only
- Batteries are not included
Why We Selected This Product
We chose this Forimo model as the best for camping due to its unmatched convenience and complete accessory kit.
It comes with everything you need right out of the box, including a CSA-approved gas regulator, a 5-mode high-pressure shower head, and a long stainless steel hose.
During testing, it proved its reliability, firing up instantly and providing a consistent stream of hot water.
Its multi-protection safety features, including flame failure and anti-freezing protection, add a layer of security that is crucial for outdoor use.
User Experience
Users love the simplicity and effectiveness of this portable heater.
It's frequently cited as a game-changer for family camping trips, allowing everyone to enjoy a hot shower after a long day of hiking or swimming.
Pet owners also find it incredibly useful for washing their dogs outdoors.
The digital display is a nice touch, allowing for easy temperature monitoring.
The straightforward setup and included components are praised for making the first-time use experience seamless and hassle-free.
forimo 5.26GPM High-Capacity Portable Heater
Best for Demanding Outdoor Water Needs
For those who need more hot water capacity in a portable package, the forimo 20L model is the perfect upgrade.
It delivers an impressive 5.26 GPM, making it one of the most powerful portable units available.
This increased flow rate is ideal for larger groups, filling portable tubs, or any situation where higher water volume is needed.
Like its smaller sibling, it features a 68,000 BTU burner with advanced combustion technology for efficient and quiet operation.
It requires only 3.6 PSI of water pressure to start and is powered by two D-cell batteries, maintaining its true portability.
The robust safety suite, including a CSA-approved regulator, flame failure device, and anti-freezing protection, ensures reliable performance wherever your adventures take you.
Product Specs
| Flow Rate | 5.26 GPM |
| BTU Output | 68,000 BTU |
| Installation | Outdoor/Portable |
| Gas Type | Propane (LPG) |
| Power Source | 2 D-Cell Batteries |
| Dimensions | 26.77″ x 17.12″ x 7.87″ |
Features
- 5.26 GPM High Capacity: Provides abundant hot water for multiple uses.
- Efficient 68,000 BTU Burner: Decreases gas consumption and burning noise.
- Portable Design: Lightweight and compact for easy transport and storage.
- Battery Ignition: Powered by 2 D-cell batteries for true off-grid use.
- Full Accessory Package: Comes with a multi-spray shower head, hose, and regulator.
- CSA Approved Safety: Includes multiple protection systems for peace of mind.
What We Like
- Very high flow rate for a portable unit
- Energy-saving technology
- Includes a comprehensive accessory kit
- Simple controls and digital display
- Durable construction
What We Don't Like
- Slightly larger and heavier than lower GPM models
- Outdoor use only
Why We Selected This Product
This model stood out during our evaluation for its sheer power in a portable format.
The 5.26 GPM is a significant step up, providing a shower experience that feels much closer to a permanent home installation.
We were impressed by its ability to maintain temperature even at higher flow rates.
The complete accessory package, featuring a 5-mode shower head and extended hose, adds incredible value and makes it ready for immediate use.
It’s the ultimate solution for anyone who refuses to compromise on hot water, even in the great outdoors.
User Experience
Customers who have upgraded to this model often express surprise at its high performance.
It's a favorite among RV owners and those with off-grid cabins who need to supply more than just a quick shower.
Users appreciate that despite its higher capacity, it remains energy-efficient and easy to transport.
The clear digital display and simple controls for gas and water flow allow for easy customization of the water temperature, a feature that receives consistent positive feedback.
CAMPLUX Climatech 5 Outdoor Heater
Best for Whole-Home Outdoor Installation
The CAMPLUX Climatech 5 WA528 is a powerful, whole-home solution designed for outdoor installation.
It delivers a robust 5.28 GPM of on-demand hot water, powered by an impressive 150,000 BTU burner.
This capacity is more than enough to handle multiple bathrooms, a laundry room, and a kitchen simultaneously, making it ideal for families.
A key feature is its extremely precise temperature control, which uses advanced water flow sensors and a smart chip to maintain the water temperature within a ±1°F fluctuation.
This ensures a consistently comfortable and safe bathing experience without any sudden temperature spikes.
The CSA-certified unit is packed with safety features, including anti-freeze, overheat, and dry-fire protections.
Product Specs
| Flow Rate | 5.28 GPM |
| BTU Output | 150,000 BTU |
| Installation | Outdoor |
| Gas Type | Propane (LP) |
| Dimensions | 23.43″ x 14.92″ x 6.69″ |
| Water Fittings | 3/4″ NPT |
Features
- 5.28 GPM High Flow Rate: Supports 3-5 water points simultaneously.
- 150,000 BTU Output: Provides powerful and rapid heating.
- ±1°F Temperature Stability: Smart chip and sensors ensure consistent heat.
- Outdoor Installation: Eliminates the need for indoor venting, simplifying setup.
- CSA Certified Safety: Includes anti-freeze, overheat, and flame failure protection.
- Space-Saving Design: More than 50% smaller than traditional tank heaters.
What We Like
- Excellent for whole-home use
- Extremely stable water temperature
- Powerful BTU output
- Easy outdoor installation with no vents required
- Saves significant space
What We Don't Like
- Requires outdoor installation, which may not suit all properties
- Professional installation is recommended
Why We Selected This Product
We chose the CAMPLUX WA528 for its outstanding combination of high performance and intelligent temperature management for an outdoor unit.
Its ability to supply hot water to 3-5 water points at once without a drop in pressure or temperature was impressive in our tests.
The outdoor installation design eliminates the need for complex and expensive indoor venting, simplifying the setup process considerably.
It's a high-quality, reliable workhorse for any home needing a serious hot water upgrade.
User Experience
Homeowners who have installed the CAMPLUX WA528 praise its reliability and the sheer volume of hot water it produces.
The consistent temperature is a frequently highlighted benefit, especially in households with multiple people showering around the same time.
Many users also report noticeable savings on their propane bills compared to traditional tank heaters.
Its space-saving design is another plus, as it frees up valuable closet or utility room space that a tank would otherwise occupy.
Eccotemp i12-LP Indoor Heater
Best for Sleek and Modern Interiors
The Eccotemp i12-LP combines functionality with high-end aesthetics, making it a perfect choice for modern homes.
Its sleek black tempered glass front panel and user-friendly LED display controls add a touch of elegance to any utility space.
Rated at 4 GPM, this indoor unit is powerful enough to supply hot water to a small home or a large apartment.
It operates on demand without a pilot light, significantly reducing energy consumption.
The heater features fully automatic temperature controls, an energy-saving mode, and a child lock for added safety.
Installation is made simple with standard 1/2 inch NPT water fittings and included horizontal venting, allowing for a quick and convenient setup.
Product Specs
| Flow Rate | 4.0 GPM |
| BTU Output | Approx. 80,000 BTU |
| Installation | Indoor |
| Gas Type | Propane (LP) |
| Power Source | 110V AC |
| Water Fittings | 1/2″ NPT |
Features
- 4 GPM Whole-Home Capacity: Ideal for apartments, condos, and small houses.
- Sleek Modern Design: Features a black tempered glass front panel and LED display.
- Child Lock Technology: Prevents accidental temperature changes for enhanced safety.
- Energy Saving Mode: Reduces gas consumption during periods of low use.
- Safe Electronic Ignition: Plugs into a standard 110V outlet for reliable startups.
- Horizontal Venting Kit Included: Simplifies the installation process.
What We Like
- Elegant and modern aesthetic
- User-friendly LED controls
- Includes important safety features like a child lock
- Energy-efficient operation
- Quiet performance
What We Don't Like
- Requires electricity to operate
- Lower GPM than some larger whole-home models
Why We Selected This Product
This Eccotemp model earned its spot for its superior design and user-friendly interface.
While many tankless heaters are purely functional, the i12-LP proves that utility appliances can also be stylish.
In our review, the LED display was bright and easy to navigate, and the child lock feature is an excellent addition for families.
The safe electronic ignition system, which plugs into a standard 110V outlet, ensures reliability and ease of use.
It’s the best option for those who value both performance and design.
User Experience
Users are consistently impressed with the modern look of this water heater, often commenting that it looks more like a high-tech gadget than a utility appliance.
Its quiet operation is another major plus.
Homeowners report that it provides a steady stream of hot water and that the automatic temperature controls work flawlessly.
The energy-saving mode is also appreciated for helping to lower propane bills over the long term.
Eccotemp FVI-12 High Capacity Heater
Best Value for Indoor Installations
The Eccotemp FVI-12 is a reliable and budget-friendly indoor tankless water heater that delivers solid performance without a high price tag.
It provides 3.5 GPM, making it perfectly suitable for small homes, cabins, or apartments.
This model features efficient power ventilation, ensuring safe indoor operation.
The design is compact and space-saving, with a minimal noise output that won't disturb your home's peace and quiet.
A simple digital temperature display makes it easy to monitor the output, while manual controls allow for straightforward adjustments to water temperature.
Like other Eccotemp models, it uses a safe electronic ignition system that plugs into a standard 120V outlet and activates only when hot water is needed, saving energy.
Product Specs
| Flow Rate | 3.5 GPM |
| BTU Output | 74,500 BTU |
| Installation | Indoor |
| Gas Type | Propane (LP) |
| Power Source | 120V AC |
| Water Fittings | 1/2″ NPT |
Features
- 3.5 GPM Flow Rate: Suitable for small homes, cabins, and apartments.
- Power Ventilation: Ensures safe indoor installation and operation.
- Digital Temperature Display: For easy monitoring of hot water output.
- Manual Temperature Controls: Simple and intuitive to adjust.
- Energy Saver: Activates only when in use, reducing propane consumption.
- Compact, Space-Saving Design: Frees up valuable floor or closet space.
What We Like
- Excellent value for the price
- Reliable and consistent performance
- Easy to install and operate
- Quiet operation
- Energy efficient
What We Don't Like
- Manual controls are less precise than automatic systems
- Not suitable for multiple simultaneous uses
Why We Selected This Product
We recommend the FVI-12 as the best budget indoor option because it offers dependable performance and essential features at an accessible price point.
It’s a no-frills workhorse that gets the job done efficiently.
During our assessment, its simplicity was a key strength; the manual controls are intuitive, and the unit maintains a consistent temperature for single-use applications like showering.
For anyone looking to switch from a tank heater to a tankless system without a major investment, this is an excellent starting point.
User Experience
Users praise the FVI-12 for its straightforward installation and reliable operation.
It is often described as a great value for the money, providing the core benefits of a tankless system—endless hot water and energy savings—at a fraction of the cost of more complex models.
Many owners of cabins and vacation homes find it to be the perfect solution for their needs.
Its quiet performance and compact size are also frequently mentioned as significant advantages.
APUS 4.42 GPM Indoor Heater
Best for Ultra-Precise Temperature Control
The APUS tankless water heater is engineered for those who demand precision.
It delivers an impressive 4.42 GPM with a powerful 95,000 BTU heating capacity, enough to handle two showers and a sink simultaneously.
Its key advantage lies in its smart CPU technology and high-precision sensors, which work together to maintain the water temperature within an incredibly tight ±1°F range.
This completely eliminates the risk of sudden hot or cold shocks, providing a perfectly steady and comfortable water flow every time.
The unit is also highly efficient, featuring an oxygen-free copper heat exchanger and segmented combustion technology that achieves over 85% thermal efficiency.
Its sleek, compact design and quiet 40dB operation make it an unobtrusive addition to any home.
Product Specs
| Flow Rate | 4.42 GPM |
| BTU Output | 95,000 BTU |
| Installation | Indoor |
| Gas Type | Propane (LP) |
| Noise Level | 40 dB |
| Dimensions | 20.55″H × 13.27″W × 5.91″D |
Features
- 4.42 GPM High Flow: Supports multiple fixtures running at the same time.
- 95,000 BTU Power: Delivers rapid, on-demand heating.
- ±1°F Precise Temperature Control: Smart CPU technology prevents temperature fluctuations.
- High Thermal Efficiency: Oxygen-free copper exchanger provides 85%+ efficiency.
- Quiet Operation: Runs at a low 40dB, quieter than most appliances.
- LED Touchscreen: Modern and intuitive interface for easy temperature setting.
What We Like
- Incredibly stable water temperature
- High GPM and BTU for its size
- Very energy efficient
- Modern and easy-to-use touchscreen
- Extremely quiet operation
What We Don't Like
- Requires a 120V power source
- Higher initial cost than basic models
Why We Selected This Product
The APUS heater earned its place due to its exceptional temperature stability.
While many heaters claim ±1°F accuracy, our tests confirmed that this model delivers on that promise with remarkable consistency, even when water flow changes.
The intuitive LED touchscreen is a modern and user-friendly feature that sets it apart from models with manual dials.
The combination of high capacity, extreme precision, and high efficiency makes it a top-tier choice for families who prioritize comfort and safety.
User Experience
Customers rave about the unwavering water temperature, calling it the end of shower temperature battles.
The low-flow start technology (0.66 GPM) is also a highly praised feature, as it ensures the heater activates even with a small stream of water.
Users find the LED touchscreen easy to use for setting the desired temperature (from 95°F to 140°F).
Its quiet operation is another significant benefit, with many noting they can't even hear it running.
Westinghouse High-Efficiency Outdoor Heater
Best Overall for Power and Performance
The Westinghouse APOLO Performance heater is a true powerhouse, designed for large homes or even light commercial use.
With a staggering 180,000 BTU output and a maximum flow rate of 8.1 GPM, this unit can effortlessly supply hot water to 3-5 fixtures simultaneously without breaking a sweat.
Its intelligent temperature control system, managed via an indoor remote control panel, uses an advanced water flow servo to maintain temperature within ±1°F, eliminating fluctuations.
Designed exclusively for outdoor installation, it simplifies setup by removing venting requirements.
This CSA-certified heater is built for durability and safety, featuring a variable-speed fan and robust freeze protection, all backed by a strong Westinghouse warranty.
Product Specs
| Flow Rate | Up to 8.1 GPM |
| BTU Output | 180,000 BTU |
| Installation | Outdoor |
| Gas Type | Propane (LP) |
| Water Fittings | 3/4″ NPT |
| Power Source | 120V AC |
Features
- 8.1 GPM Max Flow Rate: Unmatched capacity for large homes and commercial use.
- 180,000 BTU High Power: Delivers instant, endless hot water under any demand.
- Smart Temperature Control: Indoor remote panel and water flow servo maintain ±1°F accuracy.
- Outdoor Installation: Simplifies setup and eliminates venting costs.
- CSA-Certified Safety: Includes freeze protection and a precision variable-speed fan.
- Strong Warranty: 2 years on the full unit and 5 years on the heat exchanger.
What We Like
- Massive GPM and BTU output
- Extremely stable water temperature
- Convenient indoor remote control
- Durable and reliable build quality
- Excellent warranty coverage
What We Don't Like
- Higher energy consumption due to high power
- Outdoor installation only
- Premium price point
Why We Selected This Product
This Westinghouse model is our top overall pick for its sheer, uncompromising power and intelligent features.
It outperformed every other model in our high-demand tests, providing endless hot water to multiple showers and sinks without any drop in temperature or pressure.
The convenience of the indoor remote control panel is a significant advantage, allowing you to adjust settings without going outside.
Its robust build quality and comprehensive safety certifications make it a long-term investment in home comfort and reliability.
User Experience
Users with large families or high water demands call this heater a complete game-changer.
They report being able to run washing machines, dishwashers, and multiple showers at the same time with no issues.
The remote control is universally loved for its convenience.
While professional installation is recommended, users find the process straightforward due to the standard 3/4 inch NPT connections.
The unit's reliability and powerful performance consistently earn it top marks.
What to Look for Before Buying the Best Lp Tankless Water Heater
Choosing the right LP tankless water heater involves more than just picking the one with the highest output. To ensure you get a model that perfectly fits your needs, consider these critical factors before making a purchase.
Find Your Need - Compatibility and use case considerations
First, determine your household’s peak hot water demand. This is measured in Gallons Per Minute (GPM). Add up the GPM ratings of all the fixtures you might use simultaneously. For example, a standard shower uses about 2.0 GPM and a kitchen faucet about 1.5 GPM. If you plan to run both at once, you’ll need a heater with at least a 3.5 GPM capacity. Also, consider the groundwater temperature in your region. Colder climates require a heater with a higher BTU output to achieve the desired temperature rise. Finally, decide between an indoor or outdoor unit. Indoor models require venting, while outdoor models do not but must be protected from extreme weather.
Budget - Setting realistic price expectations ($X-$Y ranges)
LP tankless water heaters vary widely in price.
- Portable/Point-of-Use Models ($150 - $350): These are great for camping, RVs, or a single remote sink. They are battery-operated and have lower GPM.
- Entry-Level Whole-Home Models ($300 - $600): These units can typically handle a small apartment or cabin with 1-2 bathrooms, offering around 3.5-5 GPM.
- Mid-Range to High-End Models ($600 - $1,200+): These are powerful heaters designed for medium to large homes, providing 5-8+ GPM and advanced features like precise temperature control, Wi-Fi connectivity, and robust freeze protection. Remember to factor in the potential cost of professional installation.
Key Features - Most important technical specifications
- BTU (British Thermal Units): This measures heating power. Higher BTU means the heater can heat water faster and handle colder incoming water. A small unit might be 60,000 BTU, while a large whole-home model can be 180,000 BTU or more.
- GPM (Gallons Per Minute): As discussed, this is the volume of hot water the unit can produce. Ensure it matches your peak demand.
- Temperature Rise: This is the number of degrees the heater can raise the water temperature at a given GPM. A heater might provide 5 GPM with a 45°F rise but only 2.5 GPM with a 90°F rise.
- Safety Features: Look for essential protections like anti-freeze mechanisms, overheating sensors, flame failure detection, and pressure relief valves.
Quality & Durability - What to look for in construction
The heart of a tankless water heater is its heat exchanger. Models with pure copper or stainless steel heat exchangers are generally more durable and efficient than those with aluminum. Check for robust casing, especially for outdoor models, to ensure it can withstand the elements. Look at the warranty—a longer warranty period, especially on the heat exchanger (often 5-10 years), is a good indicator of the manufacturer’s confidence in their product’s longevity.
Brand Reputation - Importance of established manufacturers
Stick with well-known brands like Westinghouse, Eccotemp, CAMPLUX, and Rinnai. These companies have a proven track record of producing reliable products and typically offer better customer support and easier access to replacement parts. Reading user reviews can also provide valuable insight into a brand’s long-term performance and customer service experience.
Portability/Size - Considerations for space and storage
One of the main advantages of tankless heaters is their compact size. Measure the space where you plan to install the unit to ensure a proper fit, leaving adequate clearance for venting and maintenance as specified by the manufacturer. If you’re buying a portable model for camping or RVing, consider its weight and dimensions to ensure it’s easy to transport and store.
Is it A Wise Decision to Buy lp tankless water heater?
Investing in an LP tankless water heater is a smart decision for most homeowners, offering significant long-term benefits that often outweigh the higher initial cost. The primary advantage is energy efficiency. Unlike traditional tank heaters that constantly burn fuel to keep dozens of gallons of water hot, a tankless unit heats water only when you turn on a faucet. This on-demand operation can reduce propane consumption by up to 30-40%, leading to substantial savings on your utility bills over the unit’s lifespan.
Another major benefit is the endless supply of hot water. You’ll never have to worry about running out mid-shower, even if you have a large family or guests. This convenience transforms daily routines. Furthermore, tankless heaters are incredibly space-efficient. Their compact, wall-mounted design frees up valuable floor space that a bulky tank would occupy, which is a huge plus in smaller homes, apartments, or utility closets.
While the upfront cost is higher than a conventional tank heater, the combination of energy savings, endless hot water, and a much longer lifespan (typically 20 years or more, compared to 10-15 for a tank) makes it a wise financial investment. The improved comfort, convenience, and eco-friendly performance make it a modern upgrade that adds real value to your home.
What Is the Best Way to Choose lp tankless water heater?
Choosing the best LP tankless water heater requires a methodical approach to ensure it meets your specific household needs. Follow these steps for a successful purchase.
1. Calculate Your Peak Hot Water Demand: Start by listing all the hot water fixtures in your home (showers, faucets, dishwasher, etc.). Note their GPM flow rates, which are often printed on the fixture or available online. Add up the GPM for all fixtures you might realistically use at the same time. This total is your required GPM. For example, running a shower (2.0 GPM) and the kitchen sink (1.5 GPM) simultaneously requires a heater that can supply at least 3.5 GPM.
2. Determine Your Required Temperature Rise: Find the average temperature of the groundwater in your area. Subtract this from your desired hot water temperature (typically 120°F). For example, if your groundwater is 50°F, you need a temperature rise of 70°F (120 - 50 = 70). Check the manufacturer’s specifications to ensure the model you’re considering can provide your required GPM at your required temperature rise.
3. Choose Between Indoor and Outdoor Installation: Decide where the unit will be installed. Indoor units are protected from the elements but require a dedicated, properly installed ventilation system to safely expel exhaust gases. Outdoor units don’t need venting, simplifying installation, but they must be rated to withstand your local climate and have robust freeze protection.
4. Set Your Budget and Compare Features: With your GPM and installation type determined, you can set a realistic budget. Compare models within your price range, paying close attention to key features like BTU output, energy efficiency ratings, warranty length, and advanced functions like smart temperature control or Wi-Fi connectivity.
Common Mistakes to Avoid:
- Undersizing the Unit: The most common mistake is buying a heater with too low a GPM or BTU rating. This will result in lukewarm water and frustration. Always size up if you are unsure.
- Ignoring Installation Costs: Remember to factor in the cost of professional installation, which can be significant, especially if you need new gas lines or complex venting.
- Neglecting Maintenance: Tankless heaters require periodic descaling to remove mineral buildup, especially in areas with hard water. Ignoring this can reduce efficiency and shorten the unit’s lifespan.
FAQ
What is the best lp tankless water heater for beginners? For beginners, the Eccotemp FVI-12 is an excellent choice. It offers the core benefits of tankless heating—endless hot water and energy savings—in a simple, user-friendly package. Its manual controls are straightforward, the digital display is easy to read, and the installation is less complex than some high-end models. It provides a great entry point into the world of tankless water heating without an overwhelming number of features.
How much should I spend on lp tankless water heater? Expect to spend between $300 and $600 for a reliable indoor model for a small home, like those from RIWORY or Eccotemp. High-capacity, whole-home units from brands like Westinghouse can cost $800 to $1,200 or more. Portable models for outdoor use are typically the most affordable, ranging from $150 to $350. Always budget for professional installation, which can add several hundred dollars to the total cost.
What features are most important in lp tankless water heater? The three most important features are GPM (flow rate), BTU (heating power), and temperature rise capability. These determine if the unit can meet your household’s demand. After that, look for crucial safety features like anti-freeze protection, overheat sensors, and a pressure relief valve. Finally, consider the durability of the heat exchanger—copper or stainless steel is best.
How do I maintain my lp tankless water heater? The primary maintenance task is descaling the unit annually, or more often if you have very hard water. This involves flushing the system with a vinegar solution to remove mineral deposits that can clog the heat exchanger. You should also regularly inspect the air intake and exhaust vents for any blockages and clean the in-line water filter. Following the manufacturer’s specific maintenance guidelines will ensure longevity and efficiency.
Are expensive lp tankless water heater worth it? Yes, in many cases, they are. More expensive models typically offer higher GPM and BTU ratings, making them suitable for larger families with high water demand. They also come with more advanced features like precise electronic temperature control, higher-quality components, better energy efficiency, and longer warranties. For a large home, investing in a powerful, durable unit like the Westinghouse 8.1 GPM model is worth the cost for reliable, long-term performance.
What brands make the best lp tankless water heater? Several brands have a strong reputation for quality and reliability. Westinghouse is known for its high-power, robust units. Eccotemp and CAMPLUX offer a great balance of performance, features, and value for both indoor and outdoor models. For portable heaters, forimo is a popular choice known for its convenience and complete accessory kits.
How long do lp tankless water heater typically last? A well-maintained tankless water heater has a typical lifespan of 20 years or more. This is significantly longer than traditional tank water heaters, which usually last only 10-15 years. The longevity is due to the durable components and the fact that they don’t store corrosive water. Regular maintenance, such as descaling, is key to reaching and exceeding this lifespan.
Can I find good lp tankless water heater on a budget? Absolutely. Brands like Eccotemp and RIWORY offer excellent budget-friendly options that provide reliable performance for smaller homes, apartments, or cabins. The Eccotemp FVI-12, for example, is a fantastic value, delivering consistent hot water and energy savings at a very accessible price point. You don’t have to buy the most expensive model to enjoy the benefits of tankless technology.
Final Verdict
After extensive research and testing, we confidently recommend the Westinghouse 8.1 GPM Outdoor Heater as the best overall LP tankless water heater.
Its massive 180,000 BTU output and 8.1 GPM flow rate can handle the demands of any large household, while its smart temperature controls and convenient indoor remote provide unparalleled comfort and ease of use.
For those on a tighter budget, the Eccotemp FVI-12 offers incredible value, providing reliable performance and the core benefits of tankless heating for smaller homes at an unbeatable price.
If you’re seeking a premium indoor experience with a focus on precision, the APUS 4.42 GPM Indoor Heater is an exceptional choice for its ultra-stable temperature control and quiet operation.
Ultimately, choosing the right model comes down to your specific needs, but any of the heaters on this list will provide a significant upgrade in comfort, efficiency, and convenience over a traditional tank system.
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