Best Natural gas tankless water heater in 2022 – Reviews & Buyer Guide

No matter what part of the world you live in, one of the main concerns for homeowners is the need to heat up hot water. That’s why tankless water heaters are among the most popular item on the market today. Tankless gas water heaters provide greater hot water output and higher hot water capacity which allows you to meet your demand with an endless supply of long-lasting hot water. Natural gas tankless water heater’s higher output capacity ensures that you get the most out of each unit, while an increase in energy efficiency reduces your energy bills. Primarily because natural gas is a more affordable heating source than electricity or propane.

A natural gas tankless water heater can also provide a continuous supply of hot water for multiple applications in your home. In addition, unlike traditional storage tanks that use dangerous elements or chemicals to generate heat, natural gas tankless water heaters provide a much safer alternative.

These gas water heaters are recommended for people who spend most of their time at home, especially in the bathrooms where you’ll enjoy an endless stream of hot water. This is the best option for your family to save on energy bills while still enjoying the endless supply of hot water throughout your entire house.

Quick Shopping Picks for Best Natural gas tankless water heater

Are you worried about the lack of time? We have a quick solution in the form of “quick picks.” Check it now and have an accurate purchase.

Budget Pick

Takagi T-H3-DV-NG is a condensing tankless water heater. It is a powerful tankless water heater that is also budget-friendly. It also got a lot of safety features that make it optimum for any environment. It is also backed by a superior warranty to rely on in case of an accident.

Best Pick

Rinnai RUR199IN is the best tankless water heater out there. If you are a person that some time regrets his choices then Rinnai RUR199IN will make you regret-free. Although expensive it got all the features one can find in a tankless water heater and much more. It is also backed by a superior warranty to rely on.

Staff Pick

Rheem RTG-95 DVNG is a great choice if brand reliance is what you believe in. It is an amazing choice that comes with all its bases covered. Although less powerful it is by no doubt one of the best tankless water heaters out there.

At a Glance:

Our recomendation for Top Natural Gas tankless Water heaters

The best natural gas tankless water can be a cost-effective and environmentally friendly choice for your home. Rather than holding hot water in a tank until it is needed, these heaters heat the water as is requested. This means that the energy is only used as needed, as opposed to heating cold water again and again, which also wastes energy.

In addition, natural gas tankless water heaters come with some other advantages. A variety of sizes and types are available, with each having the ability to easier temperature adjustment. Among these, the cost-effectiveness of natural gas tankless water heaters is one of the main advantages. These units are more expensive than electric units, but as they use cheaper energy resources they are a better choice in long term. On top of this, natural gas tankless water heaters come with cost savings in other areas like in the form of rebates.

The performance of the best natural gas tankless water heaters is unmatched. They have high-tech features that ensure the delivery of an endless supply of hot water without any need to wait. There are many different manufacturers out there who offer a huge selection of models, however, it is good to know what makes them stand apart from their competition before you make a purchase.

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Best natural gas tankless water heater outdoor
1. Rinnai RL75EN Outdoor Natural Gas tankless water heater
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Best natural gas tankless hot water heater
Best Pick2. Rinnai RUR199iN tankless water heater
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Best indoor natural gas tankless water heater
3. Noritz NRC66DVNG Indoor Condensing Direct Tankless Hot Water Heater
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Best rated natural gas tankless hot water heater
4. Eccotemp i12-LP Water Heater
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Best 120V natural gas tankless water heater
5. Takagi T-KJr2-IN-NG Indoor Tankless Water Heater
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Best direct vent natural gas tankless water heater
Staff Pick6. Rheem RTGH-95DVNG Indoor Direct Vent Tankless Natural Gas Water Heater
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Best natural gas condensing tankless water heater
Budget Pick7. Takagi T-H3DVNG Natural Gas Indoor Tankless Water Heater
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Best natural gas tankless water heater
8. Rinnai RL94en Natural Gas Tankless Hot Water Heater
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1. Rinnai RL75EN Outdoor Natural Gas tankless water heater

Best natural gas tankless water heater outdoor

Rinnai RL94eN Tankless Hot Water Heater
Rinnai RL94eN Tankless Hot Water Heater

The Rinnai RL75EN Tankless Water Heater is a strong tankless water heater that runs on natural gas. It is an outdoor model that doesn’t need a vent as it can exhaust the gases outside directly to the external environment instead of polluting your house environment. Similarly, it is easier to install new channels outside the house without damaging the internal decor.

A Rinnai RL75EN comes with 7.5 gallons per minute of heating capacity and a 10-year limited warranty on the heat exchanger for maximum energy efficiency and longer life. The Rinnai RL75EN Natural Gas Tankless Water Heater’s wifi connectivity makes it extremely convenient. It is also Energy Star rated, reflecting that it is energy efficient which will give you energy savings in the future. Similarly, an energy Star certification also makes it eligible for a rebate of up to $300!

FEATURES:

Simple Gas Conversion

The Rinnai RL75EN Natural Gas Tankless Water Heater product is simple to install as it is 1/2 in. gas line compatible. This means that you don’t need to do many upgrades on gas channel connections to power your Rinnai RL75EN. Your previous connections may be sufficient enough to power this tankless water heater.

Wifi connectivity

The Rinnai RL75EN Natural Gas Tankless Water Heater product has wifi connectivity, which is a great advantage for this tankless unit as you can turn on the gas without getting up from your comfy couch. Just connect to your phone and you can do everything with just a few clicks such as turn on the heater remotely via phone

Just turn on the heater to get hot water, you can also do it directly from your phone without getting up. That is the level of convenience provided by the Rinnai RL75EN’s wifi connectivity.

Frost and Surge Protection

The Rinnai RL75EN Natural Gas Tankless Water Heater product is built to have Frost and Surge Protection. The Rinnai RL75EN will activate itself if there are power outages or temperatures drop below 40° F which otherwise could cause your water heater to freeze up or be permanently damaged.

Low NOx

The Rinnai RL75EN Natural Gas Tankless Water Heater product has Low NOx emissions, which means that despite being a natural gas tankless water heater it is eco-friendly. Its NOx emissions are minimized which means it is safe for your family to use a water heater with a minimal amount of toxic chemicals to release into the air.

Warranty

Heat Exchanger warranty is 12 years. 5 Years on all other parts. 1-year reasonable labor.

Certified

UL, SCAQMD, CSA, and ANSI certified

Unit’s requirements

      This module needs the following requirements for proper functioning; 

  • Activation flow rate is 0.4 GPM
  • water pressure for normal operations is 20-150 Psi
  • voltage demand is 120V
  • Amp need is 12 AMP
  • BTU demand is 10,300-180,000 BTUs
  • venting requires 2.5 in.
  • water and gas fittings compatible with 3/4 in. NPT

Specifications

  • Color: silver
  • Weight: 52 pounds
  • Dimensions: 17.5 in. width x 31 in. height x 13 in. depth

Pros

  • Safe for colder climates
  • Eco-friendly
  • Wifi capable
  • No vents due to outdoor unit
  • Lower upgrade requirements

Cons

  • Longer wait time if the required fixture is far from the tankless unit.

Why you should buy this?

if you want a tankless water heater that has something of everything that you may need. Rinnai RL75en is the one you should get. It got a high hot water output that can be controlled by wifi while ensuring that you have to deal with the least amount of bills.


2. Rinnai RUR199iN tankless water heater

Best Pick

Best natural gas tankless hot water heater

Rinnai RU199iN RRU199iN, RU199in-Natural Gas/11 GPM
Rinnai RU199iN RRU199iN, RU199in-Natural Gas/11 GPM

The Rinnai RUR199IN is the perfect choice for large families. It is a powerful all-rounder tankless unit which gives high hot water output as well as provides it with no wait time due to its ThermaCirc technology. A single Rinnai RUR199IN is sufficient to provide all your hot water needs. It does all this while keeping your utility bill at its lowest with its 93% energy efficiency. Apart from the fact that it is extremely pricey, it is the best tankless water heater available.

FEATURES

Error codes

This product features an LCD that is able to detect errors within the system. It will alert you when it detects any problems with the unit, like if there is a leak in one of the components. This can be extremely beneficial because it tells the user exactly where the problem is and how they should fix it without having to call professionals or wait for help. The fact that this product has an additional feature prevents many unnecessary inconveniences.

ThermaCirc360 Recirculation

The RUR-199iN tankless water heater has a built-in recirculation pump that allows cold water to re-enter into the tankless water heater and ensure hot water remains in pipes so that you get hot water at the first instance. This is obviously a very helpful feature because it means that you can get hot water in various different locations within or around your home without having to worry about the wait time.

Modulation Technology

The RUR-199iN tankless water heater features an advanced high-efficiency modulating technology that prevents higher energy usage by shutting off the unit when not in use. This feature is extremely helpful because it ensures that you are never left without hot water at any period of time, which can really cause problems for people who live in colder climates.

Quiet operations

This product is very quiet during operation, this means that it will likely have little or no effect on your daily life if you install it within your home. The noise generated will depend on your specific needs and how much hot water you typically use throughout a given day, but even if you use a lot of hot water this tankless heater is likely to be significantly quieter than your current setup.

Ultra-low NOx

The RUR-199iN features ultra-low NOx emissions which ensures that you can use it in locations with strict environmental regulations without worrying about the legality of doing so.

Temperature rise and Flow rate:

Temperature Rise 40°F 55° F 70° F 85° F 100° F

Flow rate 9.8 GPM 7.0 GPM 5.5 GPM 4.5 GPM 3.8 GPM

Warranty

Heat Exchanger warranty supports an extensive-time period of 12 years while part replacement and labor are covered for 5-years and 1-year respectively.

Certified

Certified by AHRI, CSA. It is also certified by Energy Star.

Unit’s requirements

      This module needs the following requirements for proper functioning; 

  • Minimum activation flow rate is 0.4 GPM
  • Water pressure recommended is 50-150 psi
  • Voltage need is 120V
  • Wattage demands is 84 watts
  • Water and gas connection operate with ¾ in. NPT
  • Condensate Drain support ½ NPT
  • Venting Requires 2 in. nominal PVC or 3 in./5 in. concentric venting
  • Minimum/Maximum BTU requires 15,000/199,000 BTU

Specifications

  • Color: Silver Metallic
  • Weight: 64 pounds
  • Dimension: 31.3 in. height, 18.5 in. width, and 11.5 in. depth

Pros

  • Touch screen control
  • Recirculation ready
  • Low NOx emissions
  • Safety features
  • High energy efficiency
  • Large tankless capacity

Cons

  • Very heavy
  • Expensive

Why you should buy this?

It is the most powerful and advanced tankless water heater that you can get on the market. which means that you can experience the highest luxury that you can get from a tankless water heater. no wonder it is one of the top picks among the water heater buyer.


3. Noritz NRC66DVNG Indoor Condensing Direct Tankless Hot Water Heater

Best indoor natural gas tankless water heater

Noritz NRC66DVNG Tankless Hot Water Heater
Noritz NRC66DVNG Tankless Hot Water Heater

The NRC66-DV-NG is a condensing tankless water heater that delivers the best combination of efficiency, reliability, and durability. It’s perfect for any home or business with hot water needs up to 6.6 GPM. Because of its small size, this device can be placed practically anyplace in your home or company without taking up too much space. This model will save you so much money on your energy bill you will wonder why the unit was so affordable.

FEATURES

Freezing protection

The NRC66 DV NG has an internal freeze protection feature that activates if the tankless runs into a freezing climate which makes it reliable and safer to use in colder climates where freezing is a concern!

Durable Heat Exchanger

The NRC66-DV-NG water heater has a durable high-quality heat exchanger. It is made from Heavy-duty stainless steel materials and offers the best combination of efficiency, durability, and affordability in its class! The reinforced anode rod prevents corrosion and ensures the maximum lifespan

Low NOx

The Noritz NRC66-DV-NG has a small profile and does not require an oxygen sensor allowing it to meet the tightest state regulations on NOx emissions, making it much more efficient than standard combustion units without sacrificing performance.

Overheating and Surge protection

The NRC66-DV-NG has an integral safety device that shuts the unit down if it overheats or senses a surge in voltage. This makes the unit much more reliable and safe to use.

Warranty

The NRC66-DV-NG comes with a 12 Year Heat exchanger, 5-year Parts, and 1 year of Labor. This makes the unit much more reliable and safe to use.

Certifications

Certified by American National Standard (ANSI) and Canadian Standard (CSA), Certified by Energy Star, certified by NSF, Low NOx certified by SCAQMD,

Unit’s requirements

      This module needs the following requirements for proper functioning; 

  • Activation flow rate @ 0.5 GPM
  • Normal water pressure is 30-150 psi
  • Voltage demand is 120V
  • power demand is 56 Watts
  • Water and connection compatible with ¾ in. NPT
  • Condensate Drain needs to be fitted with ½ in. NPT
  • Venting Requires 3 in. schedule 40 PVC
  • Minimum/Maximum BTUs demand is 15,000/120,000 BTU

Specifications

  • Color: Beige
  • Weight: 39 pounds
  • Dimension: 23.6 in. height, 13.8 in. width, and 6.7 in. depth

Pros

  • High energy efficiency
  • Low NOx emission
  • Wide operating range
  • Condensing tankless water heater
  • Quiet operation

Cons

  • Require condensate neutralizer

Why you should buy this?

if you are into condensing tankless water heaters for their highest energy efficiency and energy saving but are limited by budget. Noritz NRC66 is your guy. It is the cheapest condensing model available in the market. Also, it is covered by a superior 12-year warranty.


4. Eccotemp i12-LP Water Heater

Best rated natural gas tankless hot water heater

Eccotemp i12-NG Tankless Water Heater
Eccotemp i12-NG Tankless Water Heater

ECCOTEMP l12-NG tankless water heater is a natural gas unit that features a sleek design that comes in black color. It has been designed to provide hot water for small and middle-sized families. This tankless water heater can instantly heat the water with no storage of hot water, thus saving you money on your utility bills.

It features low flow activation which helps in reducing energy consumption by shutting off the unit when water is needed in a very minute amount. While its child lock technology allows you to be worry-free from naughty kids messing with the tankless water heater temperature setting.

FEATURES

Self-modulation Technology

ECCOTEMP l12-NG tankless water heater with self-modulation is an economical way to replace traditional storage tanks that are costly both in the purchase price and to operate. A built-in device detects when the unit is not producing adequate amounts of hot water and automatically increases the unit’s heat output.

Child Lock Technology

If you have children at home, safety is one of your top priorities. If there is a need for hot water it can be an issue if small hands are reaching out for temperature control. ECCOTEMP l12-NG tankless water heater has child lock technology to prevent accidental use by little ones. This allows you to focus on other things while your kids are enjoying hot water thanks to this modern appliance!

Compact and Sleek design

It has a sleek design that allows it to discretely fit into tight spaces and still provide hot water, making it the perfect addition to your home!

Error codes

ECCOTEMP l12-NG tankless water heater comes equipped with error codes that help pinpoint potential problems right away. This way, if something does go wrong, you’ll have immediate access to details about what needs fixing and can focus on quickly getting your ECCOTEMP l12-NG back up and running again!

Warranty

Heat Exchanger: 5-years

Parts: 2-years

Certified

UL certified

Unit’s requirements

      This module needs the following requirements for proper functioning; 

  • Activation flow rate is 0.6 GPM
  • water pressure for normal operations is 50-80 Psi
  • voltage demand is 120V
  • Amp need is 12 AMP
  • BTU demand is 25000-75,000 BTUs
  • venting requires 2.5 in.
  • water and gas fittings 1/2 in. NPT

Specifications

  • Color: black
  • Weight:28.9 pounds
  • dimensions: 13.7 in. width x 25 in. height x5 in. depth

Pros

  • Aesthetic and sleek design
  • The energy efficiency of 91%
  • Child lock
  • Eco-friendly with lower carbon footprint
  • Inexpensive

Cons

  • Low powered with 4 GPM capacity

Why you should buy this?

The ECCOTEMP l12-NG tankless water heater is a small and compact and child friendly tankless water heater. It is easy to install, highly efficient and saves your money on energy bills. This tankless water heater is cost effective for small families


5. Takagi T-KJr2-IN-NG Indoor Tankless Water Heater

Best 120V natural gas tankless water heater

Takagi T-KJr2-IN-NG Indoor Tankless Water Heater
Takagi T-KJr2-IN-NG Indoor Tankless Water Heater

The Takagi T-KJr2 Tankless Water Heater is an indoor tankless water heater that provides 6.6 GPM of hot water, making it ideal for a small household or single bathroom. The T-KJr2 runs on natural gas and has a stainless steel composition to protect against rusting and corrosion. It’s Energy Star certified so you can save money on your energy bills while conserving the environment at the same time. The T-KJr2 also features freezing protection, overheating protection, surge protection, and more to give the highest value to your investment.

FEATURES:

Diagnostic Error Codes

The T-KJr2 is equipped with diagnostic error codes that will help you troubleshoot any problems that may occur.

Stainless Steel Composition

The T-KJr2 features a stainless steel composition to protect against rusting and corrosion, giving it the highest value for your investment.

Self-Modulation

Self-modulation means that the unit’s heat output is automatically adjusted according to the demand of hot water in order to save energy. This also prevents scalding by regulating temperature.

Freezing, Overheating and Surge Protection

The Takagi T-KJr2 Tankless Water Heater is equipped with an anti-freeze function that prevents water from freezing in the event of a power outage. To avoid overheating, this appliance will turn off, if the temperature rises beyond 140 degrees Fahrenheit. This characteristic also contributes to the heating element’s longer lifespan. A built-in surge protection device protects against voltage spikes and surges, keeping your home safe from electrical damage.

GPM and Temperature rise

Temperature Rise 35°F 50°F 60°F 80°F 100°F

Flow rate 6.6 GPM 4.7 GPM 3.7 GPM 3 GPM 2.5 GPM

Warranty

Heat Exchanger: 10 years

Parts: 5 years

Certified

UL certified, Energy Star Certified

Unit’s requirements

      This module needs the following requirements for proper functioning; 

  • Activation flow rate is 0.50 GPM
  • Water pressure needs to be 30-150 psi
  • stainless-steel direct venting (4 inches)
  • Minimum/Maximum BTU required for this unit is 19500/140000 BTU
  • The voltage needed is 120V
  • Water and gas connections are compatible with ¾ in. NPT

Specifications

  • Color: white
  • Weight: 38 pounds
  • Dimension: 20.3 inches in height, 13.8 inches in width, and 6.7 in-depth

Pros

  • Freezing, overheating, and surge protection
  • Durable heat exchangers
  • Higher energy saving
  • Japanese Technology
  • Superior warranty

Cons

  • The energy efficiency of 81%

Why you should buy this?

Takagi T-KJR2 is an amazing choice for those who like to keep things on budget but don’t want to sacrifice on safety and ease. It is highly affordable and gives high energy saving hence you get the least bills. while its durable build, japanese technology and 10 years warranty ensure you a peace of mind for a long duration.


6. Rheem RTGH-95DVNG Indoor Direct Vent Tankless Natural Gas Water Heater

Staff Pick

Best direct vent natural gas tankless water heater

Rheem RTGH-95DVNG Indoor Direct Vent Tankless Natural Gas Water Heater
Rheem RTGH-95DVNG Indoor Direct Vent Tankless Natural Gas Water Heater

For households with 3 to 5 bathrooms, the Rheem RTGH-95DVLN tankless water heater is a common pick. The Energy Star certified unit has a flow rate of 9.5 GPM. It features stainless steel composition that protects against corrosion and scale deposits. It is also accompanied by freeze protection as well as overheating protection that protects the unit regardless of the temperature. The surge protection feature safeguards the unit from damages caused by power surges up to 2250 amps. All these features make Rheem RTGH-95 quite a safer choice in the long run. While the wifi connectivity allows users to monitor their unit’s performance remotely via mobile application.

FEATURES:

Built-In Condensate Neutralizer

The unit has an internal condensate neutralizer, which eliminates the need for an external drain pipe or pump. It also reduces potential installation issues associated with acidic and corrosive fumes damaging your drain or plumbing system.

Recirculation Kit Ready

Rheem RTGH-95 allows you to easily attach a recirculation pump to your water heater, for increased efficiency.

Self-Diagnostic System

The unit has a self-diagnostic system, which provides the user with an automatic indication of any potential problems occurring within your water heater.

Ultra-Low NOx

The unit has an ultra-low NOx emission rating, which provides the safest form of combustion possible. Hence, making it a more eco-friendly option due to its low carbon footprint.

Temperature rise and flow rate:

Temperature Rise 35° F 45° F 60° F 80° F 100° F

Flow rate 9.5 GPM 8.5 GPM 6.4 GPM 4.8 GPM 3.8 GPM

Warranty

Heat Exchanger is covered for an incredible period of 15-years, followed by 5 and a 1-year warranty for parts replacement and labor.

Certifications

UPS, AHRI, and Energy Star Certified

Unit’s requirements

      This module needs the following requirements for proper functioning; 

  • The minimum activation flow rate is 0.4 GPM
  • Water pressure compatible with 30-150 psi
  • Voltage demand is 120V
  • Gas and Water connection support ¾ in. NPT
  • Condensate Drain support ½ in. NPT
  • Venting Requires 2 in. /3 in. PVC schedule 40 direct vent
  • Minimum/Maximum BTU required are 11000/199,900 BTU

Specifications

  • Color: Metal Grey
  • Weight: 82 pounds
  • Dimension: 27-½ in. height, 18-½ in. width, and 9-¾ in. depth

Pros

  • Built-in a condensate neutralizer
  • Wifi and recirculation ready
  • Wide temperature rise range
  • Energy Star Certified
  • An ideal choice for 2-4 bathrooms

Cons

  • Doesn’t have a built-in recirculation pump

Why you should buy this?

Rheem RTGH95-DVLN is a great choice if you into reducing your water heater bills to a bear minimum. It is a condensing unit that gives the highest energy efficiency and savings. It also got tons of features which make operating it user-friendly.


7. Takagi T-H3DVNG Natural Gas Indoor Tankless Water Heater

Budget Pick

Best natural gas condensing tankless water heater

Takagi T-H3-DV-N Condensing Tankless Water Heater
Takagi T-H3-DV-N Condensing Tankless Water Heater

Tankless water heaters have existed for some time, but the T-H3DVNG stands out due to its cutting-edge technology. It’s regarded as one of the most cost-effective tankless water heaters available. The Takagi T-H3DVNG has a flow rate of 11 GPM and an energy efficiency rating of 93%. This means that it can save you money in heating costs. It has error codes that will help you diagnose problems and fix them quickly and easily.

FEATURES:

Troubleshooting diagnostic codes

Takagi T-H3DVNG Condensing tankless water heater uses an onboard computer to store diagnostic codes. When there is a problem with the heater, it will display an error code on the digital display on the front of the unit.

Using these codes, you can quickly identify what’s wrong with your Takagi T-H3DVNG Condensing tankless water heater, and what needs to be done to fix the problem.

Energy Star certified

The Takagi T-H3DVNG Condensing tankless water heater is an energy star certified product, which means it will help you save on your energy bills while also saving the environment. Moreover, it can also make you eligible to get rebates on your purchase.

Freezing, Overheating Protection

The Takagi T-H3DVNG Condensing tankless water heater comes with built-in freeze and overheat protection to ensure that it’ll continue working no matter what conditions it faces.

A dual heat exchanger (primary Copper, Secondary Stainless Steel)

Takagi’s T-H3DVNG Condensing tankless water heater features a primary copper heat exchanger and a secondary stainless steel heat exchanger. This means that the unit will produce hot water faster than single-exchanger models, while still providing high-quality results.

Temperature rise and flow rate

Temperature Rise 35° F 50° F 65° F 80° F 100° F

Flow rate 10 GPM 7.5 GPM 5.8 GPM 4.8 GPM 3.8 GPM

Warranty

Heat exchanger warranty supported up to 15-years on the other hand all other parts are covered for 5-years.

Certified

Energy Star Certified, AHRI, and CSA certified.

Unit’s requirements

      This module needs the following requirements for proper functioning; 

  • Minimum flow rate is 0.40 GPM
  • Water pressure supported between 15-150 psi
  • Voltage demand is 120V
  • Water and Gas connection support ¾ in. NPT
  • Condensate Drain compatible with ½ in. NPT
  • Venting Requires 3-4 in. diameter Schedule 40 PVC

Specifications

  • Color: white
  • Weight: 71 pounds
  • Dimension: 24.88 inches in height, 17.75 inches in width, and 11.25 in-depth

Pros

  • High hot water capacity
  • Best value
  • Lots of safety mechanisms
  • Diagnostic errors
  • Energy Star

Cons

  • Doesn’t have advanced features like built-in recirculation pump

Why you should buy this?

if you got a large family but are limited to your budget. such that its not easy to decide what to buy. Takagi T-H3DVNG is the best choice for you. It offers an incredible amount of hot water output, higher energy savings, and also is comparatively cheaper than other units.


8. Rinnai RL94en Natural Gas Tankless Hot Water Heater

Best natural gas tankless water heater

Rinnai RL94eN Tankless Hot Water Heater
Rinnai RL94eN Tankless Hot Water Heater

The Rinnai RL94EN is a high-efficiency outdoor tankless water heater designed to heat water for multiple fixtures at once. It offers simple operation, easy control, and an intuitive interface. The RL94EN can be controlled remotely via Wifi with the Rinnai app on your smartphone or tablet (Android or iOS). This allows you to adjust the temperature of your hot water instantly, turn it on/off from anywhere in your home, and monitor the energy usage of the unit.

FEATURES

Wifi controllable

Rinnai RL94EN tankless water heater is wifi controllable which enables you to control the device at home without getting out of your bed.

Low NOx emission

Low NOx implies lower gas byproducts which means that it will be providing substantial energy savings and helping protect the environment. This feature also increases the product life.

The flow rate of 9.4 Gallons per minute

The flow rate of 9.4 Gallons per minute means you will be getting maximum support in taking long showers and doing other household chores. Hence, you can use the appliance to have a shower at home without worrying about running out of water.

Circlogic recirculation capacity

It has a Circlogic capacity that activates or deactivates the recirculating function. The purpose is to circulate hot water through pipes based on your usage patterns to ensure hot water at the first instance

Warranty:

Heat Exchanger warranty supported for 12-years while parts and labor are covered for 5-year and 1 year respectively.

Certified:

SCAQMD Certified, AHRI certified, ANSI certified, CSA Certified.

Unit’s requirements

      This module needs the following requirements for proper functioning; 

  • Activation flow rate is 0.5 GPM
  • Water pressure compatibility with 30-150 psi
  • Voltage demand is 120V
  • Power demand is 56 Watts
  • Water and gas connection support ¾ in. NPT
  • Condensate Drain needs to be fitted with ½ in. NPT
  • Venting Requires 3 in. schedule 40 PVC
  • Minimum/Maximum BTUs demand is 15,000/120,000 BTU

Specifications

  • Color: white
  • Weight: 39 pounds
  • Dimension: 23.6 in. height, 13.8 in. width, and 6.7 in. depth

Pros

  • The flow rate of 9.4 GPM
  • Self-modulation technology
  • Wifi controllable
  • Low NOx emission up to 0.04ppm
  • Circlogic technology for recirculation
  • No vent required

Cons

  • Expensive Price tag

Why you should buy this?

Rinnai being a king of the natural gas tankless water heater makes no compromises on quality. Rinnai 94En is a power-packed tankless water heater and offers multiple advanced features. Followed by its compact and Eco-friendly design, make it an amazing choice for house owners.


Buyer Guide

The most energy-efficient tankless water heaters are natural gas tankless water heaters. They typically cost less to operate than propane or electric tankless water heaters, and because natural gas is cheaper than other fuels. They can be installed anywhere where a natural gas supply is available.

However, you need to consider a number of things before you buy one. These things are as below.

Venting:

The only thing you need to worry about with a natural gas tankless water heater is venting. You must install an appropriate vent in order to exhaust the combustion byproducts from the natural gas flame. This is an additional expense, however, looking beyond that you will see that Natural Gas tankless water heaters are very efficient and cheapest to run.

Flow rate:

Flow rates for a natural gas tankless water heater range from 2.5 gallons up to about 11 gallons per minute (GPM). However, depending on the temperature of the incoming water, this flow rate may differ. The reason is that a tankless water heater heats water on demand or at the same instance of demand for which a lot of power is needed.

Where every tankless model is limited to a specific power level. Hence a tankless water heater will take more time to heat water with lower temperatures compared to one with a higher temperature just like when heating water on a stove. That’s why the flow rate of a tankless water heater varies with the incoming water temperature. Be sure to check the specification sheet for flow rate variations with temperature and match your needs with the selected tankless water heater.

Non-Condensing Vs Condensing Tankless Water Heater

Natural Gas tankless water heaters come in two major types; namely, the non-condensing and a condensing tankless unit. Non-condensing tankless water heaters make up the majority of tankless water heaters on the market. Where condensing tankless water heater is an upgrade of non-condensing.

A condensing water heater is much more efficient than the standard non-condensing version. A condensing unit eliminates the need for a stainless steel flue vent and reutilizes the heat of the flue to pre-heat the water to a lukewarm level before the primary heat exchanger brings it to the desired level. These two factors lower your operating costs by up to 10% compared to a non-condensing tankless water heater.

Because it employs a secondary heat exchanger, a condensing tankless water heater is substantially more expensive than a non-condensing tankless water heater. However, it also makes them more durable than a non-condensing tankless water heater.

Unit Requirements

In order for a tankless water heater to be efficient, you need to fulfill all of its requirements in terms of fuel supply, power, and maintenance needs. Since natural gas is the most common fuel source for a household water heater, it makes it logical to use a natural gas heater. The most important consideration in the natural gas water heater is the power supply.

Tankless heaters use more electrical energy than conventional tankless units, so you also need to ensure that your home has enough fuel supply available. Finally, ensure that your home is capable of handling the tankless water heater’s maintenance needs. While they are fairly reliable and seldom experience problems, you may require assistance every once in a while to ensure that all components are working properly.

However, if you have these three essential items available to you then natural gas tankless water heaters will be the most efficient and cheapest to use.

Isolation Valves

Isolation valves are a great addition to a tankless water heater. They’re especially helpful when it comes to upkeep. Without isolation valves, at the time of maintenance you need to shut down your water supply and gas supply to all the house, or else, you will be sitting ducks until maintenance is done.

But with isolation valves, you can isolate water and gas connections to the tankless water heater instead of shutting them down for the whole house. That’s why always check if the tankless water heater comes with isolation valves or not.

AwardDesignTankless heater reviewsRetailer
Best natural gas tankless water heater outdoor
1. Rinnai RL75EN Outdoor Natural Gas tankless water heater
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Best Pick2. Rinnai RUR199iN tankless water heater
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3. Noritz NRC66DVNG Indoor Condensing Direct Tankless Hot Water Heater
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4. Eccotemp i12-LP Water Heater
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Best 120V natural gas tankless water heater
5. Takagi T-KJr2-IN-NG Indoor Tankless Water Heater
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Staff Pick6. Rheem RTGH-95DVNG Indoor Direct Vent Tankless Natural Gas Water Heater
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Budget Pick7. Takagi T-H3DVNG Natural Gas Indoor Tankless Water Heater
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8. Rinnai RL94en Natural Gas Tankless Hot Water Heater
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Conclusion

I hope that the information provided above will assist you in choosing the best natural gas tankless water for your home. In case I missed anything, please let me know. If you have any questions concerning gas tankless water heaters, please leave a comment and I will respond as soon as possible.


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