Best Indoor Tankless Water Heater in 2022 – Reviews & Buyer Guide

1. Rheem RTGH-95DVLN Tankless Natural Gas Water Heater

Best indoor natural gas tankless water heater

Rheem is introducing a unique model that is simple to use and convenient. It uses the power of natural gas to provide initial fuel. It diagnoses issues itself and comes with a direct venting system.

Flow rate

This model of Rheem comes with a flow rate of 9.5 GPM. This flow rate is enough to entertain up to 6 fixtures. If your home is middle to large, then you can fulfill the home need.

Fuel type

This best Indoor Tankless Water Heater is designed to use natural gas as the main fuel. No doubt, propane using Rheem tankless water heaters are also available in the market.

Interior construction

The heat exchanger of this Rheem model is made of stainless steel. This construction is strong enough to bypass corrosion. So, the chances for leakage do not appear.

Energy efficiency

The mentioned tankless water heater is energy efficient to 94 percent. It comes with a smart electronic control system that is instrumental for energy efficiency and safety, for sure.

Environmental safe

According to manufacturers, Rheem RTGH-95DVLN tankless water heater is announced to be safe for the environment. It produces the least amount of nitrogen oxide that is small enough to disturb the environment.

Design

With a rectangle shape, this unit has a gray external appearance. The front face is too simple. No digital screen is integrated at this face, and just a red logo is available in the upper right corner. Venting and connections are present at the top side of this Rheem model.

2. Rinnai RUC98iN Tankless Water Heater

Best indoor 120 Volt tankless water heater

Meet a different model of Rinnai that comes with a simple profile and sturdy composition. It enjoys energy star certification that makes it safe to use. It is bundled with every feature that should be available in a good water heater.

Flow rate

This Rinnai model comes with a flow rate of 9.8 gallons per minute. This capacity happily fulfills the need for a large home. It can supply warm water to up to 7 fixtures.

Fuel type

For Rinnai RUC98iN, natural gas acts as the main fuel that provides the necessary power. In the market, propane and electricity types are also available.

Installation

The installation comes with a PVC venting option. This tankless water heater has been designed for indoor use only. It is worthy of hiring an expert for successful and flawless installation.

Energy efficiency

This tankless water heater is very smart to ensure energy efficiency. This feature gets active due to condensing technology that is always available to support it. Note that its energy factor is 0.92.

Design

The overall design of this unit is active to save space in your indoor location. The shape is a rectangle with a silver appearance. The front interface is simple for convenience. The lower side is housed by an integrated digital screen. Managing buttons are present very next to it.

Environment friendly

It produces a very low amount of nitrogen oxide that does not harm the surrounding. The quality of the atmosphere remains stable.

3. Eccotemp i12-NG Tankless Water Heater

Best indoor tankless water heater gas

Meet Eccotemp that is very safe to use with zero need for the pilot light. The appearance is too attractive to place at any corner of your place.

Flow rate

This tankless water heater comes with a maximum flow rate of up to 3 gallons per minute. This capacity is not too high but would meet your indoor need. This unit is not for a large house, but the smaller one would be definitely entertained.

Design

This unit comes in a rectangular shape. Best of all, the outer appearance is sleek and black that looks very good. A digital screen is integrated at the front glass panel. The temperature can be managed with integrated touch buttons. Moreover, the screen is easy to see to get a temperature update.

Energy efficiency

This tankless water heater is energy efficient. The usage of energy gets reduced, and zero pilot light is needed to make you worry less. Moreover, a specially designed energy-saving mode is available to cut down energy consumption at every go.

Safety

The company has built this unit too intelligently to ensure safety. It is equipped with child lock technology to provide an additional layer of protection. This function is not available in every brand of heater.

Additionally, the electronic ignition function is too safe to use. The cord is UL listed, which gives you confidence about safety.

4. Rinnai RUCS75iP Tankless Hot Water Heater

Best indoor propane tankless water heater

Get yourself introduced with the different tankless water heater model that is safe to use and feasible for the environment. It can supply hot water at a time up to six connections to support your need.

Flow rate

This unit of Rinnai comes with a flow rate of 7.5 gallons per minute. This capacity fulfills the demands for 5 fixtures. For a medium-size family, it is a good capacity. But, it may not meet the industrial need. Depending on the groundwater, this flow rate may changes.

Fuel type

This tankless water heater is different from other Rinnai models in terms of fuel type. Alternative to natural gas, it uses propane as the main power fuel.

Mobile application

It comes with a mobile application that allows its timer to set for hot water according to your routine. Alternatively, this system can be switch to vacation mode with the support of a remote.

Safety

This unit is safe to use as approved by SCAQMD. It comes with multiple safety features to makes its worry-less use possible.

Warranty

Its warranty is very good like other Rinnai models. For heat exchangers, this time is 10 years. On the other hand, 5 years is for parts, and 1 year is fixed for labor.

Design

In external appearance, it is white and rectangular. The front face is too simple and convenient to use. The red logo of Rinnai is present at the lowest mid-zone. While venting and connections are present at the top zone of Rinnai RUCS75iP.

5. Rinnai RL75IP Tankless Hot Water Heater

Top indoor tankless water heaters

Rinnai is here to introduce RL75IP that is too good to offer strong control. Energy star certification claims that it is safe to use for both the user and the environment both.

Flow rate

Like the above style, this model also comes with a flow rate of 7.5 gallons per minute. This capacity meets the demand for a middle home. Up to six fixtures can get hot water at a time with this capacity.

Fuel type

Propane acts as the main fuel to supply the necessary power. This feature resembles the above-mentioned tankless water heater.

Design

The feature that makes Rinnai RUCS75iP and Rinnai RL75IP different is their external appearance. Its shape is a rectangle with a gray outer finish. Moreover, the lower middle side houses a digital screen to allow temperature updates and relevant buttons. The Rinnai logo is present lower side in white to offer decent touch.

The connections are present at the bottom face of this unit.

Technology

It has integrated circ-logic technology that allows you to set the routine of warm water according to your schedule.

Warranty

Like other Rinnai models, the warranty offered by Rinnai RL75IP is also too good. The heat exchanger comes with a warranty time of 10 years. The parts get a warranty duration of 5 years, and labor time is for 1 year.

Digital screen

The screen is smaller above the buttons and shows red digits. These digits look clear against the red background.

6. Noritz NRC66DVNG Tankless Hot Water Heater

Best interior tankless water heater

Noritz is an emerging name that looks good and simple. Its condensation technology makes it energy efficient and provides endless warm water all the time. It contains every type of feature that should be present in a good water heater.

Flow rate

Noritz is another famous model that comes with a flow rate of 6.6 gallons per minute. Although this capacity is not for a large home, a middle home can get enough service with it. Generally speaking, it would supply hot water up to 5 fixtures at a time.

Fuel type

This unit runs on natural gas as the key fuel. Noritz is famous for the natural gas user than electricity.

Environment friendly

Like other safer units, this tankless water heater is also very safe for the environment. The health of the environment remains perfect due to very little emission of nitrogen oxide.

Design

The shape of Noritz NRC66DVNG and its appearance is clear white. The logo of the company is printed at the top left side of the front face that looks attractive. While the connections are designed at the bottom of this unit to allow wall mounting.

Technology

The technology integrated into this tankless water heater is condensation. This technology type separates Noritz from the other brands in the market.

7. Camptemp Propane Tankless Water Heater

Best rated indoor tankless water heaters

Camptemp is another emerging unit that is equipped with a number of protective features. In addition, it is energy efficient and offers good temperature control.

Flow rate

This Camptemp offers a maximum flow rate of 1.58 gallons per minute. This capacity is not enough to fulfill the demand for a large home. With the small home, this Camptemp model is a good option.

Fuel type

This tankless water heater’s main fuel is propane that provides enough power to meet all the demand for warm water.

Protection

In addition to overheating protection, this unit comes with anti-freeze protection that makes it safe to use a water heater. It comes with a low-pressure startup to amaze you more.

Design

The rectangle shape looks good with white external touch. Three knobs form a triangle that is used to manage water and temperature. Plus, the winter and summer option is also here to select, followed by the respective temperature.

Temperature

The maximum output power is 41,000 BTUs per hour. It provides temperature protection above 167 F. The alternation of temperature according to groundwater temperature and altitude is common.

Energy efficiency

This unit is very energy efficient. It is specifically instrumental in saving the power up to 11.5 percent.

Technology

The heat exchangers and burners are equipped with combustion technology that lowers down gas combustion. In addition, there would be the least burning noise.

8. Takagi T-H3-DV-N Tankless Water Heater

Best condensing indoor tankless water heaters

Takagi is introducing you to a good model of tankless water heater that uses condensing technology and multiple protective units. As an emerging name, Takagi offers an enhanced flow rate than other models in the market.

Flow rate

This unit a very strong to provide a maximum flow rate of 10 gallons per minute. This capacity makes it a good option for a large home or an industrial need. It can happily entertain up 8 or more fixtures at a time.

Fuel type

This unit gets the power of natural gas to offer the basic fuel. Most Takagi models are natural gas users.

Design

The shape of this tankless water heater is a rectangle with black and white touch. It is compact and enough to save your space. The connections are present at the bottom face of this unit.

Interior

A commercial-grade copper alloy makes the key components of heat exchangers. This composition enhances the heat transfer up to 25 times more than stainless steel.

Safety

A large number of safety features are integrated into this unit. These include surge protection, overheat protection, and freeze protection. Moreover, fixing diagnostic code is also available to serve you.

Environment safe

The surrounding environment does not get affected by this unit as it meets the 2012 SCAQMD rules. Actually, nitrogen oxide emission is too low to affect the environment.

9. FOGATTI Tankless Water Heater

Best budget indoor tankless water heaters

This FOGATTI tankless water heater is smart and compact to save space. Not too famous, but it comes with all the necessary features that should be present in a good tankless water heater.

Flow rate

This is a different model that belongs to an emerging brand that comes with a flow rate of 4.2 gallons per minute. No doubt, this capacity is low, but supply intense warm water to a small house. Up to 2 or 3 fixtures can be entertained with this unit.

Fuel type

Natural gas acts as the main fuel that provides all the necessary power to this unit.

Installation

Manufacturers claim that FOGATTI is easy to install. It demands standard ¾ inches NPT water fitting that is easy to find. Moreover, 3 inches vent pipe makes the installation further easy and fast. A good point of this unit is that this unit can work under low-pressure water.

Certification

This water heater has been approved by CSA that ensures its safety. Plus, it saves energy while ensuring enhanced efficiency.

Interior

The heat exchanger is made of oxygen-free copper. This composition makes it efficient and durable.

Design

This tankless water heater is rectangular and white. The front face is simple and easy. The middle top is housed by the FOGATTI logo in black. On the opposite side, there is a digital screen in the lower middle zone to get an update about the temperature.

10. AQUAH TANKLESS WATER HEATER

Best whole house indoor tankless water heaters

AQUAH is introducing you to a model that needs zero standing pilot to support you more. The ignition system is automated. You can offer it a pair of D batteries to let it function. Plus, 120 volts also work as basic input.

Flow rate

AQUAH has introduced a model of a tankless water heater that comes with a maximum flow rate of 2.7 gallons per minute. This capacity is not that high but fulfills a small home need. This unit promises to provide endless warm water in its capacity.

Fuel type

This tankless water heater uses the power of liquid propane to get functional. Natural gas is not the key power source to provide as fuel.

Energy efficiency

This model is very active in saving energy. The basic energy efficiency offered by this unit is 85 percent.

Design

This unit is rectangular in shape. The white external look is very attractive. The front face is very simple, with a blue logo at the top. The bottom zone is housed by three knobs relevant to various settings. Moreover, the digital screen is also here to give you a temperature update.