Best 30 Amp Tankless Water Heater Reviews In 2023

We get frustrated because waiting for the hot water is too much to take when you need it urgently. That’s why shifting into a tankless water tank is a good idea, but the best is to have a 30 amp tankless water heater. Nowadays people are showing very much interest in their RV, or camping.

The best 30 amp tankless water heater is equipped with energy-efficient technology, a powerful battery, strong build-up, and thermostat displays. But the most convenient fact is this tankless water heater only needs 30 amp and ensures a low cost. That’s why this product is affordable too.

Look, these 220v 30 amp tankless water heaters are for various uses, and mostly they are not suitable for the whole house line. But for a single line of water output, a 30 amp tankless water heater is great. So here we are to show you different 30 amp tankless water heaters and talk about them a bit. Read about the different tankless water heaters; the perfect one is waiting for you among them.

Top Picks

Here we will talk about the best feature of 220-volt 30-amp tankless water heaters. So for a quick look and a fast idea about the tankless water heater, this section will help you a lot.

Best for Energy Saving: ECOTOUCH Point-of-Use Tankless Hot Water Heater.

  • Ecotouch point-to-use tankless hot water heater saves much more energy as a smart modulation system reduces the system loss.

Best for Instant Heating: Ecosmart POU 3.5 Point of Use Electric Tankless Water Heater.

  • Yeah, all the tankless water heaters we are talking about are instant water heaters, but this one heats the water expectedly when the faucet is half-open.

Best for Using in Bathroom: EcoSmart ECO 11 Electric Tankless Water Heater.

  • This heater can deliver up to 3.1 gpm, so you can easily use it for showering.

Best for Smart Modulation System: Rheem 8kW 240V Tankless Electric Water Heater.

  • Many tankless water heaters have thim smart technology, but Rheem efficiently uses the system and lowers the electricity bill.

Best for Supplying water 2 Sinks: Bosch Electric Mini Tank Water Heater.

  • As the name is a mini tank water heater, you can easily understand it consumes water, doesn’t take time to make them hot, and supplies more than 1 line.

Best for User-friendly Design: Thermomate Electric Tankless Water Heater.

  • It shows the water temperature on a digital display and lets us adjust the temperature up to one degree from 80°F to 140°F.

Top 7 Best 30 Amp Tankless Water Heater Reviews 2023

We’ve tried to tell you each and every detail about the 30 amp tankless water heater. You may have an idea about the company and its popularity and then directly know about the specification that helps to understand the basic difference between each water heater. Stay tuned and find out the best one for you.

ECOTOUCH Point-of-Use Tankless Hot Water Heater

ECOTOUCH Tankless Water Heater Electric 5.5kw 240V


Ecotouch as a brand has been in business for over 20 years, and they are mostly on appliances we use daily at home. But they always try to cope with the advanced technology and ensure the quality buildup and new features. That’s what Ecotouch is trying to give this tankless water heater.


  • Color: White
  • Material: Glass
  • Power Source: AC
  • Output Capacity: 1.2 gallons/min
  • Max Temp: 109°F
  • Weight: 7.52 pounds
  • Dimensions: 11x 7.5 x 2.35 inches

Features at a Glance

  • No need to preheat. This tankless water heater takes no time to reach its max temperature.
  • Smart self-adjustment of heat according to the flow of water.
  • It features a digital display and touch panel to set everything perfectly.
  • Even the other model comes with remote control.
  • No chance of having any leakage as the inner water lines are separate.
  • Compact size. You can adjust the water heater vertically or horizontally in both ways.
  • It features over-temperature protection and dry heating protection.
  • Multiple safety protection.
  • Perfectly suits with outdoor decoration.
  • 98% thermal Efficiency
  • ETL approved.
  • Too much water flow reduces the expected temperature.

Ecosmart POU 3.5 Point of Use Electric Tankless Water Heater

Ecosmart POU 3.5 Point of Use Electric Tankless Water Heater


30 amp electric tankless water heater is very useful for home and office, and Ecosmart POU is making it easier for everyone. This water heater is capable of delivering endless water heaters, doesn’t require you to save water in the tank, and reduces overall energy use. Yeah, this water heater is not portable, but they are very easy to install everywhere.


  • Color: White
  • Power Source: AC
  • Output Capacity: 0.5 gallons/min
  • Max Temp: 80-140° F
  • Weight: 4 pounds
  • Dimensions: 6x 11 x 3 inches

Features at a Glance

  • It provides endless water and maintains the exact temperature you desire.
  • It works in an advanced way, and heats the water when water passes through the unit.
  • Wall mountable and saves a lot of space.
  • It is equipped with advanced modulating technology.
  • It cuts down the water heating time.
  • Most of the parts are replaceable.
  • It includes a 0.5 GPM sink aerator.
  • Easy installation.
  • Digital temperature control.
  • Energy efficient and replaceable parts.
  • Better customer service.
  • For long time use, this unit must update its performance level.

EcoSmart ECO 11 Electric Tankless Water Heater

EcoSmart ECO 11 Electric Tankless Water Heater


ECO 11 Smart water heater has been used worldwide in recent times. Mostly they are used in offices or restaurants. But in recent times, people have been mostly convinced about using this tankless water heater in the house. And thanks to their customer support team, as they are doing a great job both before installation and after installation.


  • Color: White
  • Power Source: battery
  • Max Amp: 57
  • Voltage: 220V
  • Output Capacity: 1.3 – 3.1 gallons/min
  • Max Temp: 80-140° F
  • Weight: 6.5 pounds
  • Dimensions: 3.75 x 8 x 11.5 inches

Features at a Glance

  • Continuously monitors the water flow and temperature automatically.
  • 90% smaller than a tank water heater. You can wall-mount it.
  • 99% thermal energy saving, only heats water when water flows.
  • Suitable for bathroom, small sink, restaurants, and office breakroom.
  • It is certified by WQA for lead-free water.
  • Saves space and decorates the bathroom and kitchen.
  • Smart temperature control system.
  • Reduce use of electricity.
  • ETL certified.
  • During winter it lacks hot water.

Rheem 8kW 240V Tankless Electric Water Heater

Rheem 240V Heating Chamber RTEX-13 Residential Tankless Water Heater


Rheem 240V tankless water heater can save 50% on water warming costs compared to other tankless water heaters. But if you compare it to a tankless water heater, it saves up to 90% cost. To save more energy and get the expected heat of water using Rheem.


  • Color: Gray
  • Material: stainless steel
  • Power Origin: AC/DC
  • Max Amp: 57
  • Voltage: 220V
  • Output Capacity: 1.95 gallons/min
  • Weight: 6.42 pounds
  • Dimensions: 12.6×8.25×3.63 inches

Features at a Glance

  • In winter, it can deliver 1.95 gpm hot water, but it provides 5.9 gpm hot water in summer.
  • Doesn’t require reducing the faucet water flow rate.
  • A smart modulation system uses the right amount of heat. So no loss of heating energy.
  • Everywhere installable. So you can install it in either the kitchen or bathroom.
  • In display, the digital heat control system will show the current water temperature.
  • Doesn’t require any venting.
  • Compact and perfect in size.
  • Uses the exact amount of heating for water.
  • Saves time and main a good GPM
  • ETL certified.
  • Pretty fragile, if somehow fall down from wall, it will break down completely.

Bosch Electric Mini Tank Water Heater

Bosch Electric Mini-Tank Water Heater (T4 Gallon)


Bosch Electric Mini Tank Water Heater is available in e sizes, and you can mount it both floor and on the wall. The mini water heater tank is so compact in size that it easily fits under sink and cabinet space. Bosch Electric 30 amp tankless hot water heater has CFC-free foam insulation and ensures maximum energy efficiency.


  • Color:white
  • Material: Premium Glass lined
  • Power Source: Corded Electric
  • Max Amp: 57
  • Voltage: 120V
  • Water Pressure: 150 psi
  • Output Capacity: 2.5 gallons/min
  • Weight: 15..5 pounds
  • Dimensions: 13.75 x 10.75 x 13.75 inches

Features at a Glance

  • It supplies hot water up to 2.5 gallons/min right where you need it.
  • Easy to maintain and doesn’t need services frequently.
  • Installation is quite easy, just mount it where you want it, pug in the cord, and attach pipes.
  • This mini water tank can supply hot water two sinks at a time.
  • It has three different sizes, so have one which you feel comfortable with.
  • 3 different sizes.
  • CFC free and excellent durability.
  • Suitable to mount at any place.
  • It can supply 2 lines at a time.
  • 6 years of warranty.
  • 7 gallon capacity water is not wall mountable.

Thermomate Electric Tankless Water Heater

Thermomate Electric Tankless Water Heater


Thermometer the 240v 30 amp tankless water heater has a wide range of uses because it will never disappoint you with a lack of water flow. That’s why the brand is popular in the 30 amp tankless water heater system. This unit will always remain in your heart. It looks compact and sleek and suits almost anywhere in the house.


  • Color: Gray
  •  Material: Alloy Steel
  •  Power Source: Hardwire
  •  Max Amp: 46
  •  Voltage: 240V
  •  Water Pressure: 150 psi
  •  Weight: 12 lbs
  •  Dimensions: 14.75 x 11.75 x 3.13 inches

Features at a Glance

  • Turn on the tap, and you will get hot water consistently at a specific temperature all day.
  • The system continuously checks water temperature and ensures stable performance.
  • Made of alloy metal, so the housing is strong enough and corrosion-free.
  • Equipped with self-modulating technology.
  • ETL certified and has overheating protection, auto-stop seating, and leakage proof.
  • Lightweight and space saver.
  • It gives 1° increment or decrement of temperature opportunity.
  • Saves 60% electric bill.
  • Iensures 99.8% heating efficiency.
  • Doesn’t come with breakers and wires.

Choosing The Right 30 AMP Tankless Water Heater

A 30 amp tankless water heater is not the biggest in size, and they can’t supply hot water to a couple of water lines at a time. Otherwise, you must sacrifice their true water heating ability. Also, this unit is not portable, so you can’t make them like other outdoor tankless hot water heaters. It means you’ll use it regularly and it will have an impact on your electricity bill. That’s to find out the best energy efficient one.

Build Material

Yeah, build material is an issue; you may like glass, an alloy-made one, and steel made one. But how do you know which one will be better? The glass one sounds cool, and it looks great when you mount it beside your glass sink. Also, the heat insulation ability is good. But for steel-made ones, you can’t even touch them from outside because of the heat, and most of them have no digital display. Also, they are corrosive. That’s why people choose either a glass-made one or an alloy-made taless water heater.

How Do You Want To Use

If you want to use the tankless water heater beside the dining room sink or kitchen sink, then we’ll suggest you have the glass one. But if you want to use it in the bathroom or under the sink, you have steel or alloy made whatever you like. But keep in mind that you need to mount the glass one because it is much heavier than an alloy and steel-made tankless water heater.

Comfortable Size 

As you are choosing to purchase the small tankless water heater, it’ll be convenient if you get a digital display on the water heater. Also try to find a simple one which doesn’t have any complex operation other than setting the water temperature, and turning it on and off.


Most of the 30 amp tankless water heaters ensure 1.75 gpm to 2.5 gpm. But the more the gpm will be, the more hot water you’ll get in less time. For the shower, we suggest you get upto 4.5 gpm. If you use it for the kitchen sink or dinning sink, then 2.5 gpm is good enough, just half the water flow of your faucet.

Temperature Protection

The tankless 30 amp electric water heaters have a smart modulation system; thus the unit doesn’t heat continuously; if the water temperature reaches the temperature you want, it heats the water according to the volume of supply water. So if you open the faucet for full water flow, the water heater will start working with more heat. If the water flow is lower, the heat will be lower too.


  1. Do they make a 30 amp tankless water heater?

– Yeah, many brands nowadays make 30 amp tankless water heaters. The size of this water heater is smaller, and you can have it anywhere inside the house.

  1. How many amps are required for a tankless water heater?

– It completely depends on how many tap lines you want to connect with the water heater. If your house has 5-7 tap lines, you will need upto 120 amp tankless water heaters. But for one or two taps, 30 amps is enough.

  1. How many amps does a RV tankless water heater use?

– 15 amps, 20 amps are quite common for tankless water heaters. But we do not see more than 120 amps regularly. Because of more than 120 amps, the heat protection system will be insecure.

Final Note 

Finding out the best 30 amp water heater is not that difficult, but you need to have some knowledge about the features. Hopefully, you guys have this knowledge now. Always for an electric corded one and the one that can supply at least two lines. Also, don’t forget to ensure a smart modulation system and an overheat protection system. These two are the most wanted features nowadays, so ensure these two before going to more fancy features.

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