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Home » Best On Demand Water Heater 2022

Best On Demand Water Heater 2023

December 18, 2022 by Editorial Team

There’s no doubt about it, hot water on demand is a luxury that most of us take for granted. We turn on our shower and water gushes out at the perfect temperature. We wash dishes and turn on the faucet to rinse them, and hot water instantly appears. We boil water for pasta, press start on the coffee machine, and the water keeps pouring. The only indication that there’s something special about this water is the bill at the end of the month.

But what if you could have the convenience of hot water on demand and not have to worry about the cost? This is where on-demand water heaters come into play. These systems are connected to your water heater or tankless water heater and heat water when you need it, instead of having a storage water heater run all the time and continuously heating water 24/7.

To help you find the best on-demand water heater for you, here’s what to look for and our top picks at a variety of price points.

# Preview Product Price
1 Camplux Pro ME25B Mini Tank Electric Water Heater On-demand Water Heater 2.5 Gallon with Cord Plug 1.44kW at 120 Volts Camplux Pro ME25B Mini Tank Electric Water Heater On-demand Water Heater 2.5 Gallon with Cord Plug 1.44kW at 120 Volts $179.99 Buy on Amazon
2 Tankless Water Heater, Camplux Constant Propane Water Heater, 3.18 GPM On Demand Water Heater, Instant Hot Water Heater, Indoor, Black Tankless Water Heater, Camplux Constant Propane Water Heater, 3.18 GPM On Demand Water Heater, Instant Hot Water Heater, Indoor, Black $399.99 Buy on Amazon
3 Seeutek Portable Water Heater 1.6GPM/6L, Outdoor Propane Gas Tankless Water Heater, On Demand Water Heater for RV Camping, Instant Hot Water for Shower Overheating Protection White Seeutek Portable Water Heater 1.6GPM/6L, Outdoor Propane Gas Tankless Water Heater, On Demand Water Heater for RV Camping, Instant Hot Water for Shower Overheating Protection White $109.99 Buy on Amazon
4 Electric Tankless Water Heater, SIVUATEK on Demand Water Heater Electric Smart Control Point of Use Water Heater Instant 6.5kW 240V for Faucets M1-65B Electric Tankless Water Heater, SIVUATEK on Demand Water Heater Electric Smart Control Point of Use Water Heater Instant 6.5kW 240V for Faucets M1-65B $119.99 Buy on Amazon
5 Camplux Tankless Water Heater, 2.64 GPM On Demand Instant Hot Water Heater, Propane Tankless Water Heater for Shower, White Camplux Tankless Water Heater, 2.64 GPM On Demand Instant Hot Water Heater, Propane Tankless Water Heater for Shower, White $299.99 Buy on Amazon
6 Tankless Water Heater Electric, thermomate 3.5kW 120V Hard Wired Point of Use On Demand Hot Water Heater Self Modulating ET035 (NO PLUG) Tankless Water Heater Electric, thermomate 3.5kW 120V Hard Wired Point of Use On Demand Hot Water Heater Self Modulating ET035 (NO PLUG) $139.99 Buy on Amazon
7 Airthereal Electric Tankless Water Heater 18kW, 240Volts - Endless On-Demand Hot Water - Self Modulates to Save Energy Use - Small Enough to Install Anywhere - for 2 Showers, Evening Tide series Airthereal Electric Tankless Water Heater 18kW, 240Volts – Endless On-Demand Hot Water – Self Modulates to Save Energy Use – Small Enough to Install Anywhere – for 2 Showers, Evening Tide series $254.99 Buy on Amazon
8 3000W Mini Water Heater 110V Electric Tankless Instant Hot Water Heater Under Sink On Demand Water Heater with Remote Control for Home Kitchen Bathroom (B-White) 3000W Mini Water Heater 110V Electric Tankless Instant Hot Water Heater Under Sink On Demand Water Heater with Remote Control for Home Kitchen Bathroom (B-White) Price not available Buy on Amazon
9 Tankless On Demand Water Heater Electric 240V, ECOTOUCH 5.5KW Hot Water Heater For Sink, Electric Instant Hot Water Heater, Overheating Protection, Sliver Tankless On Demand Water Heater Electric 240V, ECOTOUCH 5.5KW Hot Water Heater For Sink, Electric Instant Hot Water Heater, Overheating Protection, Sliver $119.99 Buy on Amazon
10 Tankless Water Heater, 3000W Mini Electric Instant Hot Water Heater with LED Display, 110V on Demand Water Heater with Remote Control (Golden) Tankless Water Heater, 3000W Mini Electric Instant Hot Water Heater with LED Display, 110V on Demand Water Heater with Remote Control (Golden) $92.99 Buy on Amazon

Our Editor’s Best On Demand Water Heater Reviews


Camplux Pro ME25B Mini Tank Electric Water Heater On-demand Water Heater 2.5 Gallon with Cord Plug 1.44kW at 120 Volts

 Camplux Pro ME25B Mini Tank Electric Water Heater On-demand Water Heater 2.5 Gallon with Cord Plug 1.44kW at 120 Volts

Key Features:

  • This on demand water heater is easy to use and can be installed independently or in-line with a large hot water source. The maximum water pressure is 150 PSI and it comes with a CSA listed Temperature & Pressure relief valve.

  • The heater can be mounted on a shelf, wall, or floor, and can be installed directly at the sink to provide hot water. It is 12.9″ wide, 12.9″ tall, and 11.5″ deep.

  • This on demand water heater has a thermostat control that allows you to adjust the water temperature. It also has a high limit device that protects against overheating.

  • This is an on-demand water heater that is easy to maintain and has a glass-lined tank for long service life.

  • The Pro mini-tank is a small, on-demand water heater that can be installed under a sink to provide hot water. It has a capacity of 2.5 gallons, and can be used to provide hot water for washing hands, dishes, or other small tasks.

$179.99 Buy on Amazon


Tankless Water Heater, Camplux Constant Propane Water Heater, 3.18 GPM On Demand Water Heater, Instant Hot Water Heater, Indoor, Black

 Tankless Water Heater, Camplux Constant Propane Water Heater, 3.18 GPM On Demand Water Heater, Instant Hot Water Heater, Indoor, Black

Key Features:

  • The Camplux 3.18 GPM propane tankless water heater delivers 3.18 gallons per minute of on-demand endless hot water, ensuring constant, comfortable, instant hot water for 2-3 persons in a whole house. This 3.18-GPM heater is activated by water flow rather than water pressure; Minimum activation water capacity rate: 0.65 GPM-4.8 GPM; Maximum input rating: 82,000 BTUs; Water connection location/size: Bottom/0.5-inch NPT.

  • The tankless propane water heater is easy to install with standard 1/2″ NPT water fittings and gas inlets. The gas water heater comes with a 2.3″ horizontal vent pipe for quick and easy installation, great for whole home, small cabins, and remote apartments. You can take the S/S wall thimble-WT236 for perfect indoor use. You will need a gas regulator (Camplux model KR-106A) and a 1 pc 5/8″ NPT male to 1/2″ BSP female gas connector adapter to hook the water heater up to a propane tank.

  • This water heater is designed for modern homes and has an easy-to-use LED touchscreen. It is a compact size, which saves space, and has a trendy black glassy front panel.

  • This propane instant hot water heater is equipped with an oxygen-free copper heat exchanger and v-type stainless steel burner for high heating efficiency up to 89.98%. It also features a 90° wind isolation design to prevent backflow wind in high floors, as well as a S/S 2.36” vent pipe to exhaust harmful gases quickly.

  • This on demand water heater is safe to use with its 6-in-1 protection, including a dry combustion feature, a flame failure device, and anti-freezing and over heating protection. The fully automatic temperature controls with an energy saving mode and child lock technology make it easy and safe to use.

  • This on demand water heater is a great choice for a shopper who is looking for an efficient and affordable option. This water heater has a standby electric power of 2W and a working electric power of 42W. Propane gas input pressure is 0.4psi. There is a pressure relief valve at the water inlet of the water heater. It is necessary to manually unscrew the pressure relief valve to drain the water inside the machine in time after using the machine to avoid freezing and blew up when the temperature is lower than 32 ° F in winter.

$399.99 Buy on Amazon


Seeutek Portable Water Heater 1.6GPM/6L, Outdoor Propane Gas Tankless Water Heater, On Demand Water Heater for RV Camping, Instant Hot Water for Shower Overheating Protection White

 Seeutek Portable Water Heater 1.6GPM/6L, Outdoor Propane Gas Tankless Water Heater, On Demand Water Heater for RV Camping, Instant Hot Water for Shower Overheating Protection White

Key Features:

  • This water heater is efficient and energy-saving. It is lightweight and convenient. It has a maximum power output of 41,000 BTU/hr and a water output of 1.6 GPM/6L.

  • This water heater is efficient and can provide instant hot water. It has two modes for summer and winter, and the technology used can save gas and reduce noise.

  • This water heater is CSA certified for safety and has multiple safety features, including overheat and anti-freeze protection.

  • This tankless water heater is lightweight, portable, and easy to install, making it great for outdoor use. It has a compact and sturdy frame design that is durable and long-lasting.

  • This water heater is great for anyone who needs hot water on the go. It’s perfect for camping, car washing, and even bathing your pets. It’s safe and easy to use, and it’s energy-efficient, so you’ll save money in the long run.

  • This on demand water heater comes with a reliable after-sales service. If you have any questions about the product, you can contact customer service and they will help you solve any problems you have.

$109.99 Buy on Amazon


Electric Tankless Water Heater, SIVUATEK on Demand Water Heater Electric Smart Control Point of Use Water Heater Instant 6.5kW 240V for Faucets M1-65B

 Electric Tankless Water Heater, SIVUATEK on Demand Water Heater Electric Smart Control Point of Use Water Heater Instant 6.5kW 240V for Faucets M1-65B

Key Features:

  • The M1-65 is a small, powerful water heater that can provide instant hot water on demand. It is designed for use in small spaces and can be installed a few feet away from the faucet or other feature that you want to use it with. It has a 6.5kW heating system that can provide hot water at 110 degrees Fahrenheit in seconds.

  • This water heater is smart and efficient, able to adjust power input based on flow rate and temperature in real time. This results in a stable temperature, even when flow rate changes, for a comfortable experience. It also has a high energy efficiency of 98%, saving considerable electric charge.

  • This water heater is electric and does not require a tank. It is specially designed to have a long lifespan with little to no maintenance. It is also under warranty for three years.

  • This on demand water heater is ETL listed and qualifies for UL, meaning it is safe to use. It is also durable, with a long lifespan. It is perfect for use in any household, school, hospital, office, bar, or other public facility.

  • The M1-65 is a sleek, electric tankless water heater that is compact and easy to install. It comes with standard plumbing connections and a pigtail cord for easy installation with basic DIY skills.

$119.99 Buy on Amazon


Camplux Tankless Water Heater, 2.64 GPM On Demand Instant Hot Water Heater, Propane Tankless Water Heater for Shower, White

 Camplux Tankless Water Heater, 2.64 GPM On Demand Instant Hot Water Heater, Propane Tankless Water Heater for Shower, White

Key Features:

  • This on demand water heater is a Camplux high capacity 2.64 GPM propane tankless water heater that delivers 2.64 GPM on demand endless hot water. On demand water heater only heats the water when you need it and no waiting for preheat.

  • The on demand water heater is a safe and efficient way to heat water. It features 6-IN-1 Multiple Protection, which includes flame-out protection, anti-freezing protection, over-heating protection, and air flow pressure switch protection. The Safe electronic ignition system makes it easy to use, and it plugs into standard 120V electrical outlet with UL-listed cord.

  • This propane water heater is easy to install, with a standard 1/2″ NPT water fitting and gas inlet. It comes with a 2″ horizontal vent pipe for efficient power ventilation, and has a minimum activation rate of 0.65 GPM and a maximum input rating of 68,000 BTU. The water connection is located at the bottom of the heater, and is 0.5-inch NPT. You will need a gas regulator (Camplux model KR-106A) and a 1 pc 5/8″ NPT male to 1/2″ BSP female gas connector adapter to hook this water heater up to a propane tank.

  • This is an on demand water heater that is compact and energy efficient. It has a trendy design with a digital temperature display. You can switch between Eco and Full gas modes to save energy and get the ideal hot water temperature.

  • This water heater is designed for customer convenience, offering 24-hour customer service through live chat, phone support, and an online helpdesk. If you have any questions, you can give them a call at (844) 538-7475.

$299.99 Buy on Amazon


Tankless Water Heater Electric, thermomate 3.5kW 120V Hard Wired Point of Use On Demand Hot Water Heater Self Modulating ET035 (NO PLUG)

 Tankless Water Heater Electric, thermomate 3.5kW 120V Hard Wired Point of Use On Demand Hot Water Heater Self Modulating ET035 (NO PLUG)

Key Features:

  • The on demand water heater is a water heater that is instant and ready to use at any time. There is no need to wait for the tank to fill up and no standby energy consumption.

  • This is a small, compact water heater that is designed for single sink use. It is wall mounted and fits in small spaces. The temperature ranges from 85 degrees Fahrenheit to 131 degrees Fahrenheit.

  • This on demand water heater automatically adjusts the power based on the change of inlet water flow and temperature, saving up to 50% energy consumption and preventing over-heating.

  • This water heater is safe and healthy to use, and it is certified by ETL. It is equipped with multiple protection from leakage, dry fire, over-heating and over pressure. IP25 waterproof. Stainless steel heating element and no storage water, preventing sediment / scale build-up.

  • This on demand water heater is user friendly, with a touch control panel and digital temperature display. It is lightweight and easy to install, and can be installed vertically facing up or down. To use, simply open the tap to start the unit heating, with an activation flow rate of 0.4GPM.

  • This on-demand water heater is a 3.5 kW unit that requires a 40A circuit breaker and 9AWG wire size. It has 1/2″ NPT water connections.

$139.99 Buy on Amazon


Airthereal Electric Tankless Water Heater 18kW, 240Volts – Endless On-Demand Hot Water – Self Modulates to Save Energy Use – Small Enough to Install Anywhere – for 2 Showers, Evening Tide series

 Airthereal Electric Tankless Water Heater 18kW, 240Volts - Endless On-Demand Hot Water - Self Modulates to Save Energy Use - Small Enough to Install Anywhere - for 2 Showers, Evening Tide series

Key Features:

  • This water heater provides hot water on demand, without the need to preheat the water or worry about temperature fluctuations. You’ll never run out of hot water with this tankless water heater.

  • This on-demand water heater is designed to save space by mounting on the wall. It is much smaller than a traditional hot water heater with a tank, and uses 90% less space.

  • The on demand water heater is a water heater that only heats water when you need it. It is self-modulating, meaning that it only uses energy to heat up water when you are using it, which can save up to 50% on water heating costs compared to a typical tank water heater.

  • This on demand water heater requires 240 volts, 2 x 40 amp circuit breakers, and a set of 2 x (8AWG/2) wires.

  • This is an on demand water heater that is safe to use. It has high temp protection, dry heating protection, and electrical leakage protection. The electric and fluid systems are completely separated to prevent electric leakage and water pipe corrosion.

$254.99 Buy on Amazon


3000W Mini Water Heater 110V Electric Tankless Instant Hot Water Heater Under Sink On Demand Water Heater with Remote Control for Home Kitchen Bathroom (B-White)

 3000W Mini Water Heater 110V Electric Tankless Instant Hot Water Heater Under Sink On Demand Water Heater with Remote Control for Home Kitchen Bathroom (B-White)

Key Features:

  • This is an on demand water heater that is safe to use. It has been rigorously tested and has multiple protection functions. These include water and electricity isolation, IPX4 waterproof, leakage protection, dry-burning protection, and automatic power-off in over-temperature and inactive states.

  • This on demand water heater is 3000 watts and heats water quickly. It has an adjustable temperature so you can set it to your desired temperature.

  • This water heater is small and easy to install, perfect for use in the bathroom, kitchen, or under the sink. It has a standard 1/2 interface (inflow or outflow) and can be directly connected to household conventional hose connectors. Please note that the plug current is 27-32A and the trip switch is greater than 32A. The circuit breaker within 4000W requires greater than C32 and the wire within 4000W requires 2.5m².

  • This on demand water heater is suitable for summer showers and can provide comfortable water temperature for washing food, bowls, clothes, face and hands.

  • This is a water heater that can be used on demand, which means that you can get hot water whenever you need it. This is perfect for a family because it can help prevent diseases such as colds, and it also makes the body healthier overall.

Price not available Buy on Amazon


Tankless On Demand Water Heater Electric 240V, ECOTOUCH 5.5KW Hot Water Heater For Sink, Electric Instant Hot Water Heater, Overheating Protection, Sliver

 Tankless On Demand Water Heater Electric 240V, ECOTOUCH 5.5KW Hot Water Heater For Sink, Electric Instant Hot Water Heater, Overheating Protection, Sliver

Key Features:

  • The on demand electric water heater is a water heater that supplies instant, consistent and endless hot water of 116℉or higher temp shortly, no waiting for preheat nor terrible temp up & down.

  • This is a smart on demand water heater that adjusts the power input based on the flow rate and temperature setting in real time. This saves on energy costs and provides a comfortable experience.

  • This water heater is easy to use, with a digital display and touch control panel. You can simply turn on the tap and enjoy instant hot water.

  • This water heater is safe and durable, with multiple protection devices and ETL approval. It is designed to last for years.

  • This on-demand water heater is a sleek and compact tankless water heater that can be installed anywhere close to an outlet to avoid energy waste. It can be mounted horizontally, vertically, or obliquely, making it ideal for use in a kitchen, bar, school, hospital, community, or hair salon. Please verify that it is the right size for you: 5.5kW@240V; dimensions 11″ x 7.5″ x 2.35″; pipes fittings :1/2″ NPT.

$119.99 Buy on Amazon


Tankless Water Heater, 3000W Mini Electric Instant Hot Water Heater with LED Display, 110V on Demand Water Heater with Remote Control (Golden)

 Tankless Water Heater, 3000W Mini Electric Instant Hot Water Heater with LED Display, 110V on Demand Water Heater with Remote Control (Golden)

Key Features:

  • This water heater provides rapid heating, meaning that it only takes a few seconds for the water to become hot. There is no need to drain the cold water first, making it more convenient. It is also more energy efficient and environmentally friendly.

  • This is a mini water heater that is 3000 watts and is equipped with smart chips. The heater will maintain a constant temperature. The temperature is adjustable from 86 degrees to 131 degrees.

  • This tankless water heater can be controlled through a remote or through buttons on the unit itself. This makes it more convenient to use.

  • This on demand water heater is suitable for installation in many different types of rooms, including kitchens, toilets, showers, and public restrooms. It can be used for many different purposes, such as washing hands, washing dishes, washing vegetables, washing face, and bathing.

  • This on demand water heater is safe to use and has been tested rigorously. It has multiple protection functions including water and electricity isolation, IPX4 waterproofing, leakage protection, dry-burning protection, and automatic power-off in over-temperature and inactive states.

$92.99 Buy on Amazon


Best On Demand Water Heater Buying Guide

Before choosing the best on demand water heater you should consider following options:

1. Energy efficiency: One of the most important aspects to consider is the energy efficiency of the water heater.

The energy efficiency rate is expressed in Energy Efficiency Ratio (EER) and is the measure of energy input over time for an energy efficient appliance.

The higher the EER, the more efficient the appliance is. For water heaters, you should look for an energy efficiency rate of at least .75 to 1.0

2. Input rate: The input rate of a water heater is expressed in gallons per minute (GPM). The higher the GPM, the faster the hot water will be delivered.

If you have a large household, with multiple people showering and doing dishes at the same time, it is best to purchase a water heater with a higher GPM.

If you only have one or two people in your household, you can opt for a water heater with a lower GPM.

3. Storage tank size: The storage tank size of a water heater is usually expressed in gallons. If you have a smaller household and use hot water at a slower rate, you can opt for a smaller tank.

If you have a larger household and use hot water at a faster rate, you can opt for a larger tank. For example, if you have a family of four, you can opt for a 40-50 gallon storage tank. If you have a family of six, you can opt for a 60-80 gallon storage tank.

Other factors to consider include the climate of the area and the amount of water you use. For example, if you live in a hot climate, your water heater will need to work harder to provide hot water.

If you have a larger family, they will use more hot water in a day, which requires a larger tank.


On Demand Water Heater FAQs

1) What are the benefits of an on demand water heater?

Some benefits of an on demand water heater are that they are very energy efficient, they have a long lifespan, and they do not require a storage tank.

2) How does an on demand water heater work?

An on-demand water heater heats water as it is needed and does not store hot water in a tank.

3) How much does an on demand water heater cost?

There is no definitive answer to this question as the cost of an on demand water heater can vary greatly depending on the specific model and make of the heater, as well as the retailer from which it is purchased. However, on demand water heaters typically cost more than traditional water heaters.

4) What are the pros and cons of an on demand water heater?

Some pros of an on demand water heater are that they are energy efficient because they only heat water when it is needed. They also have a long lifespan and are relatively maintenance-free. Some cons of on demand water heaters are that they can be more expensive to purchase and install than traditional water heaters, and they may not be suitable for large households that use a lot of hot water.

5) How do I choose the right on demand water heater for my home?

The most important factor to consider when choosing an on demand water heater is the size of the unit. Make sure to choose a unit that is large enough to meet the hot water needs of your home. Other factors to consider include the fuel type, efficiency, and cost.


Conclusion

There are many great on demand water heater on the market. Our list of the best on demand water heater will help you save time researching and choosing the best one for you.

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