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Water heaters are appliances used to raise the temperature of water above its initial or pre-heat temperature through the process of transferring heat to water.
Usually, electricity or gas is used as an alternative form of energy to generate heat during this process. Water heaters are used both in industrial and residential units for the continuous supply of heated or hot water.
Broadly speaking, two main categories of water heaters are tankless water heaters and tank storage water heaters.
In this article, I’ll show you the top 5 best tankless water heaters for home, including the best electric tankless water heaters and the best gas tankless water heaters.
Top 5 Best Tankless Water Heaters for Home
Here is the 5 best tankless water heaters for home:
- Stiebel Eltron Tempra 24 Plus Electric Tankless Water Heater – Best Electric Tankless Water Heater
- Camplux CM264 Propane Gas Tankless Water Heater – Best Gas Tankless Water Heater
- Rheem RTEX-24 Residential Tankless Water Heater – Best High-Flow Electric Water Heater
- Camplux AY132 Propane Gas Tankless Water Heater – Best Budget Gas Tankless Water Heater
- EcoSmart ECO 11 Electric Tankless Water Heater – Best Budget Electric Tankless Water Heater
Why Use Tankless Water Heaters
Tankless water heaters (or known as on-demand water heaters), as clear from its name, this type of water heater does not have a storage tank to store hot water. Rather they directly heat and supply instant hot water to your faucet and shower as and when required.
Due to this reason, tankless water heaters occupy less space and are also energy efficient especially those operating on gas. Tankless water heaters also last longer than tank storage water heaters.
Tankless water heaters are capable enough to constantly supply heated water for a medium-sized family.
However, it is common for households to have more family members or higher water consumption to have more than one tankless water heating units installed in their houses as they need less space.
Types of Tankless Water Heaters (Electric and Gas)
As discussed in the beginning, tankless water heaters in residential units mostly work using either electric or gas power.
The first difference when choosing between an electric tankless water heater and the gas tankless water heater is their efficiency over each other.
Electric tankless water heaters are more efficient than gas tankless water heaters. Electric ones also do not shut down on their own whereas those using gas can stop working at any time.
Comparing the cost of power consumption, gas tankless water heaters are cheaper than electric tankless water heaters.
This is not just because electric power generally costs more than gas, but because electric tankless water heaters also require more power to operate thus raising your electric bill significantly.
Taking into account their lifespan, gas tankless water heaters will last longer than electric ones.
Usage of Tankless Water Heaters (Whole House vs Point-of-Use)
Tankless water heaters can also be categorized as a whole house or central hot water heaters and point-of-use or POU water heaters.
Whole house or central tankless water heaters are common in old built houses whereas new construction usually recommends using point-of-use tankless (POU) water heaters.
POU tankless water heaters are used in houses where the source of power is electric. This is because every house has electric outlets in every room. Thus installing POU tankless water heaters wherever there is also a water connection is easy.
Having a gas connection in every bathroom is not only expensive but can also cause fire hazard and explosion in case it leaks.
Having a POU tankless water heater is also advisable for big households having a need to consume more water for washing, taking showers, etc.
In terms of saving energy, whole house or central tankless water heaters are less efficient than POU tankless water heaters. This is because while covering the distance from the central tankless water heaters to the faucet, there is some loss of energy.
In POU tankless water heater, the source and faucet are so close that loss of energy during water flow is negligible.
Top 5 Best Tankless Water Heaters Reviews
Here is the in-depth reviews of the 5 best tankless water heaters for home.
1. Best Electric Tankless Water Heater: Stiebel Eltron Tempra 24 Plus Electric Tankless Water Heater Review
Tempra 24 Plus is a ‘Made in Germany’ electric powered tankless water heater by Stiebel Eltron. This on-demand continuous hot water supplier is both space and energy saver and comes with a 7-year leakage and 3-year parts warranty.
- Its Advanced Flow Control German patented technology ensures that water temperature during usage remains unchanged throughout.
- It has a digital display for accurate temperature while also monitoring water flow.
- Its self-modulating technology ensures energy-saving all the time.
- Requires a minimum water flow of 0.50 GPM to activate.
- Can only be used indoors.
Why you should buy the Stiebel Eltron Electric Tankless Water Heater?
Unlike other electric tankless water heaters, Stiebel Eltron Tempra 24 weighs only 1 pound, is completely noise-free, wall mounting, and does not require any venting. Thus is it best for any type of small home.
2. Best Gas Tankless Water Heater: Camplux CM264 Propane Gas Tankless Water Heater Review
Camplux CM264 is a high capacity, 10L/2.64 GPM, gas-powered, rectangle shape, and wall-mounting style tankless water heater from Camplux.
This compact and space-saving unit fulfills all the water heating requirements of your small modern-day home with constant on-demand hot water supply.
- Its eco/full switch function activates it only when in use, thus saving energy and your bill.
- Its modern-day digital display helps you know the exact temperature of outflowing water.
- It is equipped with multiple protection features like flame-out, anti-freezing, over-heating, and airflow pressure switch.
- Can only be used indoors.
- A slight drop in water pressure can turn it off. Although this is a safety feature, it is not good if it happens during a cold day bath.
- Water from this heater cannot be used for drinking.
Why you should buy the Camplux CM264 Propane Gas Tankless Water Heater?
Camplux CM264 tankless water heater with 2.64 gallons per minute water flow rate is ideal for indoor use in apartments, small homes, and cabins having gas connections.
3. Best High-Flow Electric Water Heater: Rheem RTEX-24 Residential Tankless Water Heater Review
Rheem RTEX-24 is an electric powered tankless water heater for indoor use in residential units. This on-demand continuous hot water source is perfect for a single point of use or multiple applications.
- It offers a flow rate of up to 5.9 gallons per minute while being 99.8% energy efficient.
- It has a digital display to adjust the temperature with possible increments of 1 degree F.
- Its durable copper immersion heating elements are replaceable.
- It is simple to install.
- It can only be used indoors.
- Is available in gray color only which may not go with most bathroom textures.
Why you should buy the Rheem RTEX-24 Residential Tankless Water Heater?
Rheem RTEX-24 is a perfect tankless water heater capable of supporting multiple applications in your home like a hand sink, washing machine, kitchen sink, dishwasher, shower, bathtub, and even the whole of your home.
4. Best Budget Gas Tankless Water Heater: Camplux AY132 Propane Gas Tankless Water Heater Review
Camplux AY132 is a CSA approved gas-powered 5L 1.32 gallons per minute tankless water heater capable of being used outdoors as well as indoors.
Due to its portability convenience, it can easily be used for multiple purposes and more than one place inside your house also.
- It requires just 3.0 PSI of water pressure to operate.
- It provides instant and constant hot water supply at any time and any place while also being energy efficient.
- It is enabled with multiple safety systems like flame failure device protection, anti-freezing protection, and oxygen depletion safety shut-off protection.
- Hot water supply is limited to 1.32 gallons per minute only.
- Any indoor place that it is intended to be used in should have proper ventilation.
- It does not have a digital screen to show the exact temperature. Instead, it only has analog temperature control knobs.
Why you should buy the Camplux AY132 Propane Gas Tankless Water Heater?
Either you are planning to go camping, wishing to have outdoor fun in cold weather, want hot water for laundry, dishes or bathing, or to bathe your pet animals, Camplus AY132 is a perfect solution to your hot water needs.
5. Best Budget Electric Tankless Water Heater: EcoSmart ECO 11 Electric Tankless Water Heater Review
Ecosmart ECO11 is an energy-efficient electricity-powered but energy-efficient tankless water heater. It also has a limited lifetime warranty and patented self-modulating technology.
Its sleek and compact patented design requires minimal space to install.
- Instant and endless hot water supply while saving up to 50% on your utility expense due to water heating.
- Digital temperature control helps you adjust the water temperature in increments of 1 degree.
- Available in multiple capacity levels as per your geographical location within the United States.
- Can only be used indoors.
- Only configured for climates with 67 Degree F and above.
- Capable of supplying only 2 gallons per minute, which supports only one shower and two sinks of water needed at one time.
Why you should buy the EcoSmart ECO 11 Electric Tankless Water Heater?
The ECO11 electric tankless water heater from ECOSMART comes in white color which goes with any textured bathroom is a perfect choice for your small apartment or in areas where hot water consumption remains low throughout the year.
How to Choose the Best Tankless Water Heaters for Home
While selecting the best tankless water heater for your home, consider the following points:
- Start with ascertaining how much you are willing to spend or what is your budget for purchasing a tankless water heater.
- Figure out how much hot water do you consume in single-use or what should be the minimum capacity tankless water heater that will be able to serve your hot water needs adequately.
- How many points of consumption or water outlets in your home do you want to cater to hot water? This will help you decide between having a central or POU tankless water heater.
- What power source do you have to run the tankless water heater?
- Depending on the weather conditions in your geographical location, what are your temperature requirements?
- After you have the answer to all the above questions, research your local market for the best available tankless water heaters that can comply with your requirements.
Tankless Water Heaters vs Water heaters with Tanks
Many things can be argued while choosing between tankless water heaters and water heaters with tanks.
The first important thing is to ascertain your budget. With tank water heaters are low-cost investments as compared to tankless water heaters.
The power source is not an issue in both the cases as both can work on gas and electricity.
With tank water heaters come with huge storage tanks that require space to install. This makes them only able to work as a central water heating system. On the other hand, tankless water heaters come as central as well as POU units.
Tankless water heaters can be installed inside of your house as well whereas tank water heaters are mostly installed outside on rooftops.
Tank water heaters are mostly unable to maintain their water temperature since cold water is regularly mixing with hot water inside the tank.
In addition to this since they are mostly installed outside, during cold weather your tank water heaters might have to work extra hard to heat and maintain water temperature inside while simultaneously battling outside cold weather to alter its heating efforts.
This activity will increase your power bills. This is not the case with tankless water heaters.
Tank water heaters also have a shorter life span as compared to tankless water heaters.
Advantages of Tankless Water Heaters
- Tankless water heaters are energy-efficient and help you save on your utility bills.
- They only work when you turn on the faucet.
- They can continuously supply instantly heated water.
- They do not require much space to install and are mostly installed indoors.
- They can be installed near point-of-use or used as central water heating units.
Disadvantages of Tankless Water Heaters
- First time purchase and installation cost of tankless water heaters can be quite huge.
- Although they offer a continuous supply of instantly heated water, they have limited capacities as compared with storage tank water heaters.
- Most point-of-use units of tankless water heaters are so small that they can only supply hot water to one faucet.
Summary of the 5 Best Tankless Water Heaters
Here is the summary and comparison of the top 5 best tankless water heaters for your review.
1. Stiebel Eltron Tempra 24 Plus Tankless Water Heater [Check Price]
- Type: Electric
- Flow Rate: 3.5 GPM
- Relative Price: $$$$
2. Camplux CM264 Propane Gas Tankless Water Heater [Check Price]
- Type: Gas
- Flow Rate: 2.64 GPM
- Relative Price: $$
3. Rheem RTEX-24 Residential Tankless Water Heater [Check Price]
- Type: Electric
- Flow Rate: 5.9 GPM
- Relative Price: $$$
4. Camplux AY132 Propane Gas Tankless Water Heater [Check Price]
- Type: Gas
- Flow Rate: 1.32 GPM
- Relative Price: $
5. EcoSmart ECO 11 Electric Tankless Water Heater [Check Price]
- Type: Electric
- Flow Rate: 2 GPM
- Relative Price: $
1. Which is better among storage tank water heaters and tankless water heaters?
The short answer to this question is choosing depending on your hot water needs. If you are a small family and occasionally require hot water like taking bath in cold weather, then perhaps a tankless water heater is enough. This is not advisable for big families needing hot water to use at multiple times during the day or year.
2. Is a tankless water heater worth an investment?
Although quite expensive in its initial phase, in the long run, tankless water heaters will save you big on your utility bills.
3. Is it safe to have a water heater installed inside your house?
Any gas leaks or short circuits resulting from incorrect wirings can cause fire or explosion in your house. Hiring professional experts to analyze what kind of water heater suits your house and to get the equipment installed from them as well is always recommended.
Depending on your location in the United States, the 5 best tankless water heaters described above come in various colors and capacities.
Remember that installing a tankless water heater is not a do-it-yourself job. Consult the manufacturer and seek professional advice on choosing and correctly installing a tankless water heater.