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Best Lp Tankless Water Heater (2024 Updated)

If you’re looking for an energy-efficient way to supply hot water to your home, a LP tankless water heater might be the perfect solution for you. Unlike traditional heaters that use tanks to store and heat water, tankless models heat water on demand. This not only saves space, but also reduces energy consumption and lowers utility bills.

Before investing in a LP tankless water heater, there are a few factors to consider. Firstly, you need to determine the size of the unit you require based on your household’s water usage. Additionally, you should consider the heater’s efficiency rating, installation requirements, and maintenance needs. These will influence the overall costs and benefits of your tankless water heater.

If you’re still on the fence about whether a LP tankless water heater is right for you, consider these questions. Are you looking for a long-term, eco-friendly solution to heating hot water? Do you want a unit that takes up less space than traditional heaters? Are you hoping to reduce your utility bills and increase your savings? If you answered yes to any of these questions, a LP tankless water heater might be the perfect choice for your household.

10 Best Lp Tankless Water Heater

# Product Image Product Name Product Notes Check Price
1
This tankless water heater is ideal for high-efficiency heating of natural gas with a maximum flow rate of 8.4 GPM.
2
The product is ideal for providing hot water outdoors through the use of propane fuel.
3
Ideal for providing instant hot water in residential bathrooms, powered by propane gas and with digital temperature display.
4
This product is ideal for providing hot water in large residential or commercial buildings with multiple bathrooms and appliances.
5
Ideal for residential hot water heating, providing high efficiency and on-demand hot water in liquid propane fuel source.
6
The propane tankless water heater is ideal for indoor installation and provides a flow rate of up to 7.5 GPM.
7
Ideal for high-efficiency and cost-effective heating of water with natural gas, suitable for both residential and commercial use.
8
The product is ideal for providing hot water without the need for a storage tank in indoor spaces using propane.
9
Ideal for providing on-demand hot water in small to medium-sized households, cabins, and RVs using LP gas fuel.
10
Ideal for outdoor use, providing hot water on demand with a propane fuel source and mid-efficiency technology.
This tankless water heater is ideal for high-efficiency heating of natural gas with a maximum flow rate of 8.4 GPM.
The product is ideal for providing hot water outdoors through the use of propane fuel.
Ideal for providing instant hot water in residential bathrooms, powered by propane gas and with digital temperature display.
This product is ideal for providing hot water in large residential or commercial buildings with multiple bathrooms and appliances.
Ideal for residential hot water heating, providing high efficiency and on-demand hot water in liquid propane fuel source.
The propane tankless water heater is ideal for indoor installation and provides a flow rate of up to 7.5 GPM.
Ideal for high-efficiency and cost-effective heating of water with natural gas, suitable for both residential and commercial use.
The product is ideal for providing hot water without the need for a storage tank in indoor spaces using propane.
Ideal for providing on-demand hot water in small to medium-sized households, cabins, and RVs using LP gas fuel.
Ideal for outdoor use, providing hot water on demand with a propane fuel source and mid-efficiency technology.

1. Condensing Tankless Water Heater – Mro Next Day

Upgrade your water heating system with the NPE-180A2 tankless water heater bundle, which includes a LP conversion kit and an outdoor vent kit. The NPE-A2 line of water heaters is highly efficient and outperforms larger non-condensing models, providing more output for your money. With lower installation and operating costs, the NPE-180A2 is the perfect choice for your next installation project.

The NPE-180A2 can be cascaded with up to 32 units using Ready-Link technology, which helps to balance out the workload of each unit for longer life. When a unit reaches 80% capacity, the next unit will turn on to meet the requirements. The common venting feature allows up to 12 units to share a vent, reducing the need for building penetrations.

This tankless water heater comes with a 1-year labor, 3-year parts, and 5-year heat exchanger limited manufacturer's warranty. This warranty covers defects arising from the manufacturing process, ensuring that you have a reliable and efficient water heating system for years to come.

Pros

  • Highly efficient and outperforms larger non-condensing models
  • Lower installation and operating costs
  • Can be cascaded with up to 32 units for longer life
  • Common venting feature reduces the need for building penetrations
  • Comes with a 1-year labor, 3-year parts, and 5-year heat exchanger limited manufacturer's warranty

2. Eccotemp 45h-Lp 6.8 Gpm Outdoor Propane Tankless Water Heater, White

The Eccotemp 45H/HI series is a propane gas powered tankless water heater that is rated at 6.8 GPM and is designed for whole home outdoor use. This energy-efficient unit activates only when in use, making it perfect for any home, apartment, or townhome. It is CSA certified for both US and Canadian use, ensuring a safe, easy, and enjoyable installation experience.

Unlike other tankless water heaters, this model does not require venting, making the installation process quick, easy, and hassle-free. The outdoor installation will save space in your home and because it is compact and quiet, you will barely notice it is there. Equipped with 3/4" NPT fittings, a temperature and pressure relief valve, and a gas shut-off valve, this tankless water heater is built to last.

Pros

  • Propane gas powered for energy efficiency
  • Designed for whole home outdoor use
  • CSA certified for both US and Canadian use
  • Does not require venting
  • Compact and quiet
  • Equipped with 3/4" NPT fittings, a temperature and pressure relief valve, and a gas shut-off valve

3. Fahrenheit Propane Tankless Water Heater – Camplux

The Camplux 3.18 GPM propane tankless water heater is a reliable and efficient solution for on-demand hot water needs. With a flow rate of 3.18 gallons per minute, it can provide constant and comfortable instant hot water for 2-3 persons in a whole house. The heater is activated by water flow, rather than water pressure, with a minimum activation water capacity rate of 0.65 GPM-4.8 GPM. It has a maximum input rating of 82,000 BTUs and a water connection location/size of bottom/0.5-inch NPT.

Installation is easy with standard 1/2" NPT water fitting and gas inlet. The heater comes with a 2.3" horizontal vent pipe for convenient and quick installation, making it great for whole home, small cabins, and remote apartments. For indoor use, a S/S wall thimble-WT236 is recommended. A gas regulator (Camplux model KR-106A) and 1 pc 5/8" NPT male to 1/2" BSP female gas connector adapter are required to hook up the heater to a propane tank.

The tankless water heater has a trendy and modern design with a unique white glassy front panel that is easy to control. The water temperature can be adjusted with the LED touchscreen, with Fahrenheit and Celsius options available. The compact size of the propane tankless heater saves more space than traditional tanks.

The Camplux propane instant hot water heater comes with an oxygen-free copper heat exchanger and a v-type stainless steel burner, providing high heating efficiency up to 89.98%. Its 90° wind isolation design ensures that the tankless propane water heater can anti-backflow wind in high floors, while the S/S 2.36" vent pipe exhausts harmful gases quickly.

Safety is a top priority with the Camplux propane tankless water heater. It comes with 6-in-1 protection, including dry combustion, flame failure device, anti-freezing protection, and over-heating protection. Fully automatic temperature controls with an energy-saving mode and child lock technology are also included.

Please note that the standby electric power of the product is 2W, and the working electric power of the product is 42W. Propane gas input pressure is 0.4psi. There is a pressure relief valve at the water inlet of the water heater. It is necessary to manually unscrew the pressure relief valve to drain the water inside the machine in time after using the machine to avoid freezing and blowing up when the temperature is lower than 32°F in the winter.

Pros

  • Provides constant and comfortable instant hot water for 2-3 persons in a whole house
  • Activated by water flow, rather than water pressure, with a minimum activation water capacity rate of 0.65 GPM-4.8 GPM
  • Maximum input rating of 82,000 BTUs and a water connection location/size of bottom/0.5-inch NPT
  • Easy to install with standard 1/2" NPT water fitting and gas inlet
  • Trendy and modern design with a unique white glassy front panel that is easy to control
  • High heating efficiency up to 89.98% with an oxygen-free copper heat exchanger and a v-type stainless steel burner
  • Comes with 6-in-1 protection for safety, including dry combustion, flame failure device, anti-freezing protection, and over-heating protection

Cons

  • – Requires a gas regulator and 1 pc 5/8" NPT male to 1/2" BSP female gas connector adapter to hook up to a propane tank
  • – Pressure relief valve must be manually unscrewed to drain the water inside the machine in time after use to avoid freezing and blowing up in the winter

4. Noritz Eztr50 180,000 Btu Multi Vent Condensing Tankless Water Heater Bundle Pack (Lp)

The Tankless Heater is a highly efficient and reliable unit that is perfect for residential use. It is a Condensing type heater that is designed to provide hot water on demand, making it a great choice for households of any size.

The Gas Input for this heater ranges from 18000 to 180000 BTU/h, allowing you to adjust the temperature to your desired level. It uses Propane as the fuel type, ensuring that it is efficient and cost-effective.

This heater is designed with advanced technology that ensures maximum efficiency and durability. It features a compact and sleek design that is easy to install and maintain. The unit is also equipped with various safety features that protect against overheating and other potential hazards.

Whether you need hot water for your shower, kitchen, or laundry, the Tankless Heater is the perfect solution. It provides a continuous supply of hot water, so you never have to worry about running out. Overall, this heater is an excellent investment for any homeowner who wants to enjoy the benefits of hot water on demand.

Pros

  • Highly efficient and reliable
  • Compact and sleek design
  • Advanced technology ensures maximum efficiency and durability
  • Provides a continuous supply of hot water

Cons

  • – May require professional installation
  • – Higher upfront cost compared to traditional water heaters

5. Rinnai V75ip Non-Condensing Propane Tankless Water Heater, Indoor Installation, Up To 7.5 Gpm

The Rinnai RE180iP is a non-condensing tankless hot water heater that heats water only when necessary to conserve energy. Its compact design is only the size of a small suitcase and fits in a wide variety of spaces, but provides up to 7.5 gallons per minute (GPM), which can support up to 5 fixtures at once. The unit features enhanced scale detection that helps prevent serious, long-term damage, and it comes with a 15-year residential guarantee for the heat exchanger, 5-year guarantee for labor, and a 1-year guarantee for parts. Additionally, the RE180iP can be controlled via WiFi using the Controlr module (not included).

To ensure proper installation, Rinnai recommends finding a qualified technician in your area to install the water heater. Visit the Find a Rinnai PRO page on their website to locate a technician. Rinnai also provides product guides, manuals, energy guides, warranty information, videos, and tables to help you find the right tankless water heater for your home. Check their Ground Water Temperature Map to see if this heater is optimal for your region.

Pros

  • Compact design fits in a variety of spaces
  • Enhanced scale detection helps prevent serious, long-term damage
  • Provides up to 7.5 GPM, which can support up to 5 fixtures at once
  • Comes with a 15-year residential guarantee for the heat exchanger, 5-year guarantee for labor, and a 1-year guarantee for partsCan be controlled via WiFi using the Controlr module (not included)

Cons

  • – Professional installation is recommended

6. Efficient Natural Gas Tankless Water Heater

Upgrade your water heating system with the NPE-210A2 tankless water heater bundle that comes with an LP conversion kit and an outdoor vent kit. This bundle ensures that you have everything you need for your next installation. The NPE-210A2 is a condensing water heater that exceeds the performance of much larger capacity non-condensing competitors, making it a cost-effective option for customers. With lower installation costs and lower operating costs, this bundle provides more output for your money.

The NPE-210A2 features Ready-Link technology that enables up to 32 units to be cascaded together. When a unit reaches 80% capacity, the next unit will turn on to meet the requirements, ensuring that the workload is evenly distributed across all units. This system provides a longer life for the units and ensures that you always have hot water when you need it. The common venting feature allows up to 12 units to share a single vent, reducing building penetrations.

The NPE-210A2 is backed by a limited manufacturer's warranty that covers a 1-year labor, 3-year parts, and 5-year heat exchanger from defects arising from the manufacturing process. This ensures that your investment is protected and you can have peace of mind knowing that you have a reliable and efficient water heating system in your home.

Pros

  • Cost-effective bundle with everything needed for installation
  • Efficient performance that outperforms larger capacity non-condensing competitors
  • Ready-Link technology allows up to 32 units to be cascaded together for even workload distribution
  • Common venting feature allows up to 12 units to share a single vent, reducing building penetrations
  • Limited manufacturer's warranty provides coverage for up to 5 years

7. Rheem Mid-Efficiency 7.0gpm Indoor Liquid Propane Tankless Water Heater

The Tankless Gas Water Heater is a cost-effective and energy-efficient solution that guarantees continuous hot water supply even with back-to-back showers. This product is an excellent investment for households looking to reduce their energy consumption without sacrificing their comfort. Unlike traditional water heaters that store hot water in a tank, this tankless water heater heats the water only when it's needed, which means it doesn't waste energy heating water that may not be used.

One of the standout features of this Tankless Gas Water Heater is its ability to automatically adjust the amount of energy required to heat the water you need. This ensures that you're not using more energy than you need to, which helps reduce your energy bills. Additionally, this product is easy to control, and you can easily adjust the water temperature ranging from 85˚F–140˚F with convenience.

Overall, the Tankless Gas Water Heater is an excellent investment for those who want to save on energy bills while enjoying hot water supply. Its continuous hot water supply, energy-efficient features, and easy control make it an excellent addition to any household.

Pros

  • Continuous hot water supply even with back-to-back showers
  • Cost-effective and energy-efficient
  • Automatically adjusts the amount of energy required to heat the water you need
  • Easy to control and adjust water temperature

8. Marey Ga10flp 2.64 Gpm, 68,240 Btu's Lp Gas Flow Activated Gas Tankless Water Heater , White

The Marey Tankless Liquid Propane Gas Water Heater is an eco-friendly option that allows you to save energy during the warm months by using less gas. This water heater is designed in a beautiful white color and weighs 22 pounds. It is battery-powered and starts with pulse ignition powered by two D batteries (not included), which means no cords are necessary.

The water heater comes with multiple safety sensors, including auto cut-off, automatic ignition, anti-dry combustion, over-pressure, overheating, flameout protection, and twin solenoid valves, which automatically shut off when there is a problem. This feature ensures that the water heater is safe for use and does not cause any accidents.

The temperature control feature of this water heater makes it ideal for indoor use in apartments, cabins, and tiny homes. You can control the temperature year-round with the convenient summer/winter switch, which allows you to adjust the temperature based on the weather. However, it is not recommended for elevations above 2,000 feet.

The 2.64-GPM heater is activated by water flow rather than water pressure, which ensures that the water heater is energy-efficient. It has a minimum activation rate of 0.65 GPM and a maximum input rating of 68,240 BTUs. The minimum temperature range is 6.80 to 64.40 degrees Fahrenheit, and the water connection location/size is at the bottom with a 0.5-inch NPT.

Overall, the Marey Tankless Liquid Propane Gas Water Heater is a great option for those looking for an eco-friendly and energy-efficient water heater that is safe for indoor use. With its multiple safety sensors and temperature control feature, you can be assured of its safe and efficient operation.

Pros

  • Eco-friendly and energy-efficient.
  • Battery-powered, so no cords are necessary.
  • Multiple safety sensors ensure a safe operation.
  • Temperature control feature makes it ideal for indoor use in various settings.
  • Energy-efficient as it is activated by water flow rather than water pressure.

Cons

  • – Not recommended for elevations above 2,000 feet.
  • – Two D batteries are not included.

9. Rheem Mid-Efficiency 8.4 Gpm Outdoor Liquid Propane Tankless Water Heater

This water heater is designed with an Exclusive Water Savings technology that conserves up to 1,100 gallons of water per year. It has a 157,000 BTU (gas consumed per hour) that ensures an efficient heating process. The Exclusive Hot Start Programming feature minimizes cold water burst by staying in a ready-fire state, which ensures that you have hot water instantly. This water heater also comes with a recirculation pump ready kit, which makes it easy to install. It provides a maximum flow rate of 8.4 gallons per minute at 35° F rise, ensuring that you get enough hot water for your needs. It is designed for outdoor use and comes with freeze protection that can withstand temperatures as low as -30 degrees.

Pros

  • Conserves up to 1,100 gallons of water per year
  • Efficient heating process with 157,000 BTU
  • Exclusive Hot Start Programming feature minimizes cold water burst
  • Recirculation pump ready kit included
  • Provides a maximum flow rate of 8.4 gallons per minute at 35° F rise
  • Designed for outdoor use with freeze protection

Best Lp Tankless Water Heater FAQs

How much does it cost to install an LP tankless water heater?

The cost of installing an LP tankless water heater can vary depending on several factors. The cost of the heater itself can range from a few hundred to several thousand dollars depending on the size and brand. Additionally, installation costs can vary depending on the complexity of the installation and the location of the heater. In general, the cost of installation can range from a few hundred to several thousand dollars. It's important to have a professional installer assess your specific needs and provide a detailed estimate for the cost of installation. Other factors to consider when determining the cost of a tankless water heater include maintenance costs and energy savings. While a tankless water heater may have a higher upfront cost, it can save you money in the long run by reducing energy consumption and lowering your utility bills.

What are the benefits of using an LP tankless water heater over a traditional tank-style water heater?

There are several benefits to using an LP tankless water heater over a traditional tank-style water heater. One of the main advantages is energy efficiency. LP tankless water heaters only heat water when it is needed, which means they use less energy overall compared to traditional tank-style heaters that constantly heat and store water. This translates to cost savings on energy bills.

Another benefit is space-saving. LP tankless water heaters are smaller and more compact than traditional tank-style heaters, which means they take up less space in your home. This can be especially beneficial for those with limited space, such as apartments or smaller homes.

In addition, LP tankless water heaters tend to last longer than traditional tank-style heaters. This is because they don't have to constantly heat and store water, which can cause wear and tear on the tank and other components. This means you'll save money in the long run on repairs and replacements.

Overall, if you're looking for an energy-efficient, space-saving, and cost-effective option for your hot water needs, an LP tankless water heater may be the way to go.

What is an LP tankless water heater and how does it work?

A LP tankless water heater is a type of water heater that uses propane gas as a fuel source to heat up water on demand. Unlike traditional tank water heaters that store hot water in a large tank, tankless water heaters only heat up water when it is needed. This means that they are more energy-efficient and cost-effective than traditional tank water heaters.

When a hot water tap is turned on, cold water flows through the tankless water heater's heat exchanger, where it is heated by the propane gas burner. The heat exchanger transfers the heat from the burner to the water, which flows out of the unit and into the pipes that deliver hot water to the taps and appliances throughout the home.

Because LP tankless water heaters don't have a large storage tank, they take up less space and can be installed in smaller areas. They also provide a constant supply of hot water, so there's no need to wait for a tank to refill before you can take a shower or do the dishes. Overall, LP tankless water heaters are a convenient and efficient way to heat up water for your home.

What maintenance is required for an LP tankless water heater and how often should it be serviced?

LP tankless water heaters require regular maintenance to ensure optimal performance and longevity. The frequency of maintenance depends on the usage of the water heater and the manufacturer's recommendations, but it is generally recommended to have it serviced annually.

The maintenance of an LP tankless water heater includes flushing the system to remove any mineral buildup or debris that may have accumulated over time. This flushing process helps to maintain the efficiency of the unit and prevent any potential leaks. Additionally, the water filter should be checked and cleaned or replaced if necessary.

It is also important to check the venting system to ensure it is free of any obstructions or damage that could cause carbon monoxide to leak into the home. The burner should be inspected and cleaned to ensure it is functioning properly and not producing any soot or carbon buildup.

Regular maintenance of an LP tankless water heater not only helps to ensure optimal performance and efficiency but also helps to extend the lifespan of the unit. It is important to follow the manufacturer's recommended maintenance schedule and to have a professional perform any necessary repairs or replacements.

What size LP tankless water heater do I need for my home?

Determining the appropriate size of an LP tankless water heater for your home requires you to consider several factors. Some of these factors include the number of individuals in your household, the daily hot water usage, and the climate in your area. In general, a family of four will require a tankless water heater with a flow rate of at least 7 gallons per minute (GPM), while a family of two will need a unit with a flow rate of 5 GPM.

However, it's important to note that your hot water needs may vary depending on your lifestyle and habits. If you have a large bathtub or frequently use multiple hot water fixtures simultaneously, you may need a larger unit. Additionally, if you live in a colder climate, you may need a more powerful unit to ensure that your water is hot enough.

To determine the appropriate size of an LP tankless water heater for your home, it's best to consult with a professional plumber or HVAC technician. They can assess your specific hot water needs and recommend a unit that will meet those needs while also being energy-efficient and cost-effective.

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