Best Value Tankless Water Heater – 7 Cheap Tankless Water Heaters

Hey there! Some links on this page are affiliate links which means that, if you choose to make a purchase, I may earn a small commission at no extra cost to you. I greatly appreciate your support!

In this article, we have reviewed the best value tankless water heater list after analyzing more than 25 tankless models. Our list is based on facts, practical data, and user reviews.

A tankless water heater doesn’t seem so remarkable from the outside, it is just like a simple box hanging on the wall but from the inside, it has marvelous features and engineering that makes it worth replacing the traditional tank-style water heater. Suppose you open a hot water faucet and there is plenty of hot water delivers within seconds without making you wait for hours.

You will see most of the energy saved by it without compromising efficiency. The life span of these tankless water heaters is beyond your expectations and installing them at your home is the smartest decision you can make.


Tempra 24 Plus
Tempra 24 Plus
  • Space-saving
  • 2.7 to 3.1 GPM
  • patented technology
EcoSmart ECO 11
  • Saves 99% thermal energy
  • Super compact
  • 1.3 – 3.1 GPM
Rheem RTX 18
Rheem RTX 18
  • LED display
  • 4.4 GPM
  • 2 Heating Elements

Best Value Tankless Water Heater

The best value tankless water heart is one that provides constant hot regardless of the outside temperature to at least 3 faucets and 2 showers. Its maintenance and installation and power consumption should cost low, and it should be budget-friendly.

After massive research, experiments and testing we have enlisted seven of the best affordable tankless water heaters for your home. The detailed features and efficiency of each of them are mentioned below so you can get the best value tankless water heater of your demand.

Things to consider before Purchasing the Best Value Tankless Water Heater

Before picking up a tankless water heater from the list here are some essential things to keep in mind:

  • Type of fuel matters a lot because the water heater is going to run over it.
  • Mounting Position & Size
  • Water Flow Rate
  • The purpose for which the water heater is being purchased.

#1 . Stiebel Eltron Tankless Water Heater- Tempra 24 Plus



  • 86 to 140 output water temperature.
  • 2.7 to 3.1 gallons of hot water per minute, 0.50 minimum GPM flow rate required to activate the unit.
  • Advanced & continuous flow rate with patented technology.
  • Space-saving sleek and small design.
  • With auto modulation its Eco-friendly unit saves energy.
  • Digital Temperature displayTempra 24 Plus- specific model is 24kW.
  • Comfortable and reliable with maximum years of warranty.
  • Quick and easy installation

With every best performing Steibel Eltron model, Tempra 24 plus has also some innovative features and highly effective performance.

Powerful 24kW Heater- Energy Efficient

The most popular for whole-house usage Steibel Eltron Tempra 24 Plus is the best and powerful Electric tankless water heater. You might want to learn how to install an electric heater as well.

It is an ideal choice with a 24kW heater for many regions including Canada and the Northern US where the temperature of water decreases up to 45 degrees Fahrenheit in winters. It also works efficiently in warmer southern regions.

This Eco-friendly unit saves energy perfectly. The auto-modulation and advance feature of the savings monitor displays the saved energy in reference to energy costs.

Microprocessor-controlled Temperature Regulation

Stiebel Eltron Tempra 24a features a digital temperature display and conveniently true microprocessor-controlled temperature regulation. It has a dial selector that allows finalizing and delivering the desired water temperature when needed.

Advanced Flow Rate Technology

The advanced and modernized flow control technology maintains the temperature of water for long-lasting comfort. The automatic feature allows reducing flow instantly when hot water demand crosses the limit of exceeding capacity.

Easy Installation & Operation

The small, sleek and compact design saves space and makes its installation easy by providing an endless amount of hot water without requiring any kind of venting.

There is no noise pollution in the unit.

The electronic switch of this tankless water heater activates the water heater with no noise at all. So you don’t need to worry about noises produced by most of the water heaters.

Some Important Details

  • Stieble Tempra has solid copper heating chambers.
  • Cost savings visible on savings monitor
  • For massive energy savings, it has an electronically controllable water flow
  • Instant and continuous hot water supply
  • Digitalized temperature display
  • Auto modulation for energy efficiency
  • The Advance flow rate keeps the temperature at its constant range
  • Memory buttons for presetting temperature



  • Weight: 1 Pound
  • Dimensions: 4.63 × 16.63 × 14.5 inches
  • Voltage: 240 V
  • Wattage: 18,000 Watts
  • Batteries Included: No
  • Battery Needed: No
  • Maximum Amperage Draw: 100A
  • Warranty: 7-year leakage & 3-year parts warranties

Note: It is highly recommended that a minimum of 150 AMP household electrical services is required for its installation. If you’re not sure about the electrical capacity of your home consult an electrician for further guide.

Make sure the wire gauge and breaker size meet all applicable electrical codes for your areas. Wiring should be sized in a way to keep the balance of voltage drop of less than 3% under load.

This unit is easy to install and operate with minimum energy costs. Water supply is quick and endless without cold water fluctuations.

The water is hot more quickly and it is great to have an endless supply of hot water.

It is simply stated that Tempra 24 plus tankless water heater features the most precise temperature control than any other electric tankless water heater on the market today.

#2 . GASLAND BE158B Tankless



  • Instant propane tankless water heater
  • Easy to install
  • Overheating protection
  • Light in weight with portable design
  • Structured with 11.5% energy-saving technology
  • LED Display screen
  • Water on demand
  • Maximum power output 41,000BTU/Hr
  • Requires low water pressure up to 2.5 PSI

The compact in size Gasland BE158B portable tankless water heater is convenient with a number of features including anti-freezing protection, overheating protection, and flame failure device to ensure the safety of the whole home.

Energy & Money Saver

Gasland BE158B 1.58GPM 6L outdoor portable tankless water heater has structured with 11.5% energy-saving technology.

The exchanger and main burner of this unit have advance combustion technology that minimizes the consumption of gas and lowers the burning noise.

By installing this tankless water heater you can save a huge amount of money.

Compactness in Design

The compact size and lightweight design make this tankless water heater easy to carry. Whenever you need hot water it will never disappoint you. This unit can be used during camping, on the beach or even you can wash your pets with hot water outdoor.

The mounting bracket of it helps to hang it on the gas water heater. Only a few minutes will be required to install and fix it.

Highly Protective for Safety of Family

The anti-freezing protection, overheating protection, and flame failure device, all features have already been installed in gasland BE158B tankless water heater for the safety of your whole home. There is the facility to lower water pressure automatically almost in between 2.5-110PSI.

To prevent freezing of water in colder areas the anti-freezing drain plug helps to drain residual water. 

In case of unexpected flameout, the gas supply shuts off automatically.

Overheating protection saves from high water temperatures over 167 degrees Fahrenheit.

Maximum Power Output

The maximum power output of 41,000BTU/Hr helps to get hot water instantly without any shortage doesn’t matter wherever you are. There is no requirement for preheating before usage.
As soon you turn on the water tap, the water will flow out with your desired temperature. It supplies 1.58 gallons of hot water per minute. The heat and water flow are completely adjustable.

A number of Applications

This propane tankless water heater has a number of applications for different purposes. You can enjoy outdoor showers with an unending supply of water on a camping trip.

It provides water on demand, so you don’t need to wait for long to get water of your desired temperature. You can also give sunbath to your pets such as horses, and dogs.

Some Important Details/Tips

  • While installing this tankless water heater make sure not to overtighten the connectors and pipes for preventing them from leakage.
  • The exhaust can easily get hot when there are some flammable objects present around it. So, try to keep such objects far from the propane tankless water heater.
  • It is much better to detect gas leakage first before using it, but keep in mind that never use a flame for leak detection. Some soapy solutions and gas detectors are recommended for this purpose.
  • Only use liquid propane in a well-ventilated place. Check the water pressure, if it is below 2.5 PSI there will be no ignition in the water heater.

Note: This gas tankless water heater isn’t suitable in areas with altitudes exceeding 2000 feet and stormy or windy conditions.



  • Weight: 16.1 Pounds
  • Dimensions: 11.8 × 6.1 × 17.3 inches
  • Voltage: 3 V
  • Wattage: 12,000 Watts
  • Power Source: Battery
  • Batteries: 2 D batteries required
  • Flow Rate: 1.85 GPM
  • Maximum Pressure: 110 PSI
  • Display: LED
  • Value for money
  • Temperature Control
  • Tech support
  • High water temperature/pressure protection
  • Overheating/anti-freezing protection
  • Energy-saving knob
  • Best for outdoor usage
  • Energy-saving knob
  • Batteries are not included

The enormous features of gasland BE158B tankless water heater make it a highly reliable and affordable water heater with the best value-saving facility. It is the smart choice for outdoor hot water supply, ideal for camping, and perfect for any place.

#3 . Camplux Gas Tankless Water Heater



  • Operates perfectly when gas pressure is 0.4PSI
  • Maximum power output 68,000BTU/Hr
  • Works greatly on modified water system with a water pump of 12 Volts.
  • Hot water output is 2.64 gallons per minute
  • Applicable water pressure ranges from 3.6-110PSI
  • Anti-freezing drain plug for protection
  • Takes less than 15minutes to install this tankless water heater
  • Structures with 11.5% energy-saving technology
  • The highly efficient combustion system

Camplux 2.64 GPM propane portable gas tankless water heater is ideal and efficient for outdoor camping and can also be mounted indoors easily.

Maximum Power Output

The Camplux propane gas tankless water heater provides 2.64 gallons of hot water instantly with a maximum power output of 68,000 BTU/Hr. It doesn’t matter where are, there will be an endless supply of hot water for you, you don’t even need to preheat the water with this best value tankless water heater.

Portable Design

You can easily carry it with you anywhere because of its compact design and weight that is about 23lbs. You can also hang it indoor/outdoor with the help of a mounting bracket on the gas tankless water heater. The whole process of installing process takes only 15 minutes.

CSA Safety Standard

Its automatic system allows decreasing water pressure in between 3.6 – 110PSI. The anti-freezing drain plug can drain residual water to prevent water from freezing in winters and areas with colder climates.

In case of exceeding water temperature more than 176 degrees Fahrenheit, the system will turn off automatically to avoid overheating.

So the safety standards of Camplux help to keep in check overheating, anti-freezing, and flame failure.

Efficient in Saving Energy

Camplux gas tankless water heater has advanced level technology for saving 11.5% of energy. To decrease the burning noise and gas consumption, the heat exchanger and burner are designed with advanced level combustion technology.

It saves energy and money efficiently when water is not in use preventing from freezing or overheating. The system will shut down itself.

Some Important Details

  • Camplux can be mounted indoors/outdoors in a well-ventilated environment.
  • Applicable in a number of additional situations such as outdoor showers, road trips, camping, and bathing dogs.
  • System works well on a modified water system with a water pump of 12 volts.
  • Camplux gas tankless water heater is not recommended for places of 2000 ft. or higher elevations.
  • It does not work well in windy environments

Note:  Check gas leakage or improper sealing to avoid any future hazards. Never twine Teflon tape between gas inlet pipe and gas regulator. The water heater can catch fire under such circumstances.

Use brass fittings for connection with torque force of 20-28Nm.



  • Weight: 18 Pounds
  • Dimensions: 12.8 × 6.1 × 21.7 inches
  • Voltage: 3 V
  • Wattage: 20 kW
  • Power Source: Battery
  • Batteries: 2 D batteries required
  • Flow Rate: 2.64 GPM
  • Maximum Pressure: 110 PSI
  • BTU Rating: 68000
  • Design Includes: 5ft Gas regulator &shower head
  • Dry combustion protection
  • High/Low water pressure protection
  • Overheating/anti-freezing protection
  • Stainless steel burner
  • 10L per flush water consumption
  • No point of use.
  • Flue pipe is not included.

Best for saving energy with so many features of standard protection Camplux propane gas tankless water heater is highly affordable. Easy to install and super quick for heating water.

#4 . Rinnai V65IN Tankless Water Heater

Rinnai V65eN


  • Indoor gas tankless water heater
  • Provides 6.5 gallons per minute
  • Voice commands controlled by smart WiFi technology
  • Lasts longer than other standard tanks water heaters
  • Works on natural gas type
  • Ideal for small to medium homes
  • Perfectly reliable for indoor locations
  • You are never going to run out of hot water supply

Space & Energy Efficient

Compact design makes it perfectly fit in every space. Rinnai tankless water heater conserves energy by operating only when necessary without wasting energy.

Enhanced Scale Detection

This tankless water heater working on natural gas has an enhanced scale detection feature that minimizes any possible risk of unit damage for a long time. It helps to save you from getting into some serious issues.

Optional Control Technology

Just enjoy a constant stream of hot water with the 6.5 GPM of powerful flow rate. It keeps in check the optimal water pressure to make sure there is no overheating taking place. It comes with the most advanced technology with value and comfort.

Some Important Details

  • Rinnai tankless water heaters have a lifespan longer than standard tank-style water heaters.
  • The optional control smart Wi-Fi technology deals with voice commands for remote access.
  • It perfectly awards with peace of mind by saving energy and money costs with warranties surpassing the high competition.
  • It has a home leaks detection gadget that shuts off the water supply to the unit and lessens any kind of possible damage.
  • Approved by Energy Star.


  • Weight: 45.6 Pounds
  • Dimensions: 14.04 × 9.27 × 26.9 inches
  • Voltage: 120 Volts
  • Water Consumption: 6.5GPM
  • Power Source: Natural Gas
  • Temperature Range Controller: 98-104 degrees Fahrenheit
  • Energy Factor: 0.82
  • Batteries: Not required
  • Maximum Gas Input: 150,000 BTU
  • Wi-Fi: Yes capable
  • Features Energy Star qualified energy factor
  • Works on natural gas
  • Longer warranty
  • Maximum Flow rate
  • Indoor use only
  • You’ll need to buy a termination kit.

#5 . Rheem RTEX-18 Electric Tankless Water Heater

Rheem RTEX-18 240V


  • LED display for external digital thermostatic control
  • Advanced level self-modulation
  • Adjustable power that meets hot water demand
  • Two heating elements of durable copper
  • 4.4 GPM of flow rate
  • Simple and easy installation
  • Can be replaced easily
  • Best value for money
  • Consumes up to 7 gallons of water
  • Voltage is about 240 Volts

Rheem RTEX-18 electric tankless water heater offers a fast and continuous supply of hot water for single point-of-use as well as for multiple applications.

Water Flow

Rheem RTEX-18 has the ability to deliver 4.4 gallons of hot water per minute with an accurate flow and consistent temperature. It has an adjustable digital temperature display dial for On/Off control.

No Heat Loss

Storage tank water heaters come usually in large, bulky sizes. They store a large amount of water and heat it gradually taking a long period, results in wasting a large amount of heat and energy to escape without being used due to the time gap between water getting hot and when you use it.

This whole problem has only one solution. It is better to replace such tank water heaters and Rheem RTEX-18 is the best to replace such traditional water heaters.

Electricity and Space Saver

With 99.8% of energy efficiency, Rheem RTEX-18 water heater helps to save money on high electricity bills. Savings can vary according to each type of heater but as compared to tank heaters it is the best value for money. It has the feature of heat retention that allows it to use electricity only when hot water is needed in the first place.

Similarly, Rheem RTEX-18 is popular in different regions where apartments are of limited size. This can be put anywhere taking very small space inside a cabinet, closet, or anywhere you want.


The lifespan of these tankless water heaters is longer than any usual bulk water heater lasting approximately 10 years more than them. The corrosion-free feature is visible due to robust copper immersion heating elements with a brass top. Pipes can be cleaned and replaced quickly.

Ensures Safety

Safety matters a lot while dealing with these water heaters. The structural damage due to corrosion is not common in this tankless water heater.

Leakage does not usually occur but in case there are some leaks you can handle it by just shutting off the nearest valve.


This electric tankless water is viable for a number of applications. Starting from standard hand sink, dishwasher, washing machine, standard showerhead, water saver shower head, bathtub to the kitchen sink, Rheem RTEX-18 is an ideal choice for a home.


  • Weight: 14.8 Pounds
  • Dimensions: 18.25 × 3.5 × 14.5 inches
  • Voltage: 240 Volts
  • Wattage: 18,000W
  • Water Consumption: 7 GPM
  • Power Source: Electric
  • Batteries: Not required
  • Maximum Pressure: 150 PSI
  • Compact design
  • Self-modulation
  • Highly durable
  • Saves electricity
  • One Tap at a time.

Rheem RTEX-18 is the best example of all benefits you can over hope to get out of tankless water heaters. The well-designed and highly efficient water heater is one of the best cheap tankless water heaters.

#6 . EcoSmart ECO 11 Electric Tankless Water Heater



  • Electric tankless water heater
  • Continuously monitors water temperature and flow rate
  • ECO 11 are 90% small in size as compared to storage tanks
  • Saves 99% thermal energy efficiency
  • Provides water in between 1.3-3.1 gallons per minute
  • Easy to use and install
  • To get a lifetime warranty, the heater must be installed by professional
  • Stylish and advanced in design
  • Compact size to save place

Get endless on-demand hot water with a controlled flow rate by ECO 11 electric tankless water heater. It is ideal for providing hot water for a small sink, bathroom, break-room, or another point of use application.

Hot Water On-demand

ECO 11 has the ability to warm water up to 140 degrees Fahrenheit and this heating system works under digital temperature control which allows changing temperature in 1-degree increment.

If the incoming water temperature is below 67 degrees Fahrenheit, its performance will be affected.

Easy installation & usage

For the installation purpose, only 60 AMP of power supply will be needed and everything will be stable by its automatic and resettable thermostat.

You can install it by yourself but the lifetime warranty clause will change in this case.

Saves Space, Energy, and Time Effectively

EcoSmart has the capability to enhance energy efficiency by up to 99%. The system will work only to heat water when needed without wasting energy.

Similarly, the compact design and size make it ideal for use at different places and can be placed in any smaller space area.

The point-of-use and on-demand ability will help to provide water without letting you wait for hours.


  • Weight: 6.5 Pounds
  • Dimensions: 3.78 × 8 × 11.5 inches
  • Voltage: 220 Volts
  • Wattage: 13,000 W
  • Temperature range: 80-140 degrees Fahrenheit
  • Max. Amperage: 57
  • Required Amperage: 1 × 60 AMP DP
  • Flow Rate: 1.3-3.1 GPM
  • Batteries: Not required
  • Warranty: Lifetime

Note: ECO 11 isn’t efficient for commercial business, larger homes with more than 3 bathrooms, and in a cold-weather climate.

  • Most of the components are made up of copper & stainless steel
  • Maximum Durability
  • The technology of unit control energy for optimal performance
  • Purposed for Multiple Applications
  • Heats water up to 2 gallons per minute
  • Point-of-use isn’t ideal for all conditions
  • A restrictor is needed for installation
  • For a lifetime warranty, the heater must be installed by a professional.

Though several features distinguish this tankless water heater from its other counterparts, one thing to keep in mind if you don’t want to compromise its lifetime warranty then it is highly recommended to hire a professional to install this tankless water heater.

#7 . Titan Electric Tankless



  • Provides a continuous supply of hot water
  • Keeps temperature consistent
  • Very easy to install
  • Have well developed adjustable temperature control consoles
  • Requires only small space for placement
  • Best vale tankless water heater saves energy, electricity, and other costs.
  • 99.5% efficient in energy saving
  • Can be used well in case of hard, soft, or city water
  • The outer covering is made of steel while the inner is copper/brass
  • It has dual heating chambers

Titan N-120 has the ability to replace an entire conventional tank-style water heater in a highly affordable range without disturbing your comfort.

Ideal for Warmer Climates

Titan N-120 is highly recommended for areas with warmer climates. More importantly, if the underground water temperature is above 65 degrees Fahrenheit.

Temperature Control Consoles

Adjustable temperature control consoles are having a switch for adjusting the exact required temperature.

Compact & Small in Size

The compact design and smaller size make it perfect to fit in any place. You don’t need to evacuate a large amount of space that is mostly needed in the case of tank water heaters. So, it is going to be ideal & very cheap.

Endless Supply of Hot Water

Enjoy the fountain of hot water without any shortage with this electric tankless water heater. The continuous flow of hot water will reach up to all faucets in your home while keeping the temperature constant.


  • Weight: 7.72 Pounds
  • Dimensions: 4.8 × 9.6 × 12 inches
  • Voltage: 220 Volts
  • Wattage: 11.8kW
  • Max. Water Pressure: 150 PSI
  • Max. Amperage: 54
  • Power Source: Corded Electric
  • Flow Rate: 3.26 GPM
  • Batteries: Not required
  • Ideal for medium-sized dwelling
  • Quick & easy install
  • Immediate money & space-saving
  • Deliver less water pressure if incoming water pressure is low to the unit
  • Low GPM = Low Pressure
  • Fluctuating water temperature

Titan N-120 is a perfect electric tankless water heater for a family of medium size. The easy-to-use adjustable controls allow you to change temperature. This water heater is very easy to install and worth enough to get one for your home.

Things to Keep in Mind before Purchasing a Tankless Water Heater

Before picking up a tankless water heater from the list here are some essential things to keep in mind:

Choosing between Gas & Electric Water Heater: matters a lot because the water heater is going to run on one of these power sources. It involves the choice of picking gas or electric tankless water heater and this choice solely depends on the availability of a particular source of power that can either be propane & natural gas or electricity.

Mounting Position & Size: It is better to know or find out the perfect size for your water heater according to the space available at your home. The small-sized water heaters are preferably good and highly recommended because they can be mounted easily on the wall and can be placed indoor/outdoor without any kind of inconvenience.

Water Flow Rate: The flow rate depends on the number of fixtures/faucets running at your home and the right amount of water usage. Each fixture has its own specific GPM value and in order to find out the flow rate, you’ll need to add GPM for each fixture. Some mostly recommended Flow Rate (GPM) has mentioned below:

  • Bathroom Faucet: 0.5 GPM
  • Shower: 2.5 GPM
  • Dishwasher: 1.0 GPM
  • Kitchen Faucet: 0.5 GPM
  • Clothes Washer: 1.5 GPM

Temperature Rise Capability: The number of degrees water needed to be heated is usually referred to by temperature rise according to your desire. It depends on two major factors:

  1. Local Water Supply
  2. Preferred Output/Temperature

In warmer areas, the local water temperature is up to 77 degrees Fahrenheit while in the north USA it can be almost 35 degrees Fahrenheit.

About Zarmish Fakhar

Zarmish has been working as a freelance research writer for 5 years. She is a Zoologist and social media activist as well. She has worked for many reputable newspapers including Dawn. She is a valuable member of Aqua macho as her passion for clean water and eco-friendly products are booming day by day.

Leave a Comment