7 Best Mini Tank Water Heaters of 2024

Mini tank water heaters are becoming increasingly popular for their compact design and efficient performance. These heaters are perfect for those who need hot water in specific areas like showers, campers, or even under the sink. With options ranging from 110v to 240v, there’s a mini tank heater suitable for every need.

Brands like Bosch, Rheem, and Ariston are leading the market with their top-quality products. Sizes vary, with 2.5-gallon and 4-gallon models being among the most sought-after. For those on the move, the small hot water heater for campers is a game-changer.

And if you’re looking for the pinnacle of efficiency, the mini tankless water heater 110v is a great choice. With so many options available, finding the best mini tank water heater tailored to your needs has never been easier.

Our Recommended:

Bosch Electric Mini-Tank Water

Bosch Electric Mini-Tank Water Heater

Prime Benefits of Mini Tank Water Heaters

Mini tank water heaters have surged in popularity due to their myriad advantages. One of the standout features is their energy efficiency.

Unlike traditional heaters that continuously heat water, these mini tanks provide hot water on demand, leading to significant cost savings on monthly utility bills. Imagine the luxury of having instant hot water at your fingertips, be it in the kitchen while cooking or in the bathroom for a quick wash.

This convenience is unmatched. Moreover, their compact design is a boon for homes with space constraints. They can easily fit under sinks or in closets without hogging much space.

1. CAMPLUX ME40 Mini Tank Electric Water Heater

The CAMPLUX ME40 Mini Tank Electric Water Heater is a top-tier product designed to provide efficient and instant hot water solutions. With a capacity of 4 gallons, this mini tank ensures you have hot water right when you need it, be it in your kitchen, bathroom, or any other space.

The elegant streamline design not only adds aesthetic value to your space but also promises longevity with its glass-lined tank. The built-in insulation foam is an added advantage, ensuring minimal heat loss and thereby saving on energy costs.

Moreover, the UL approval guarantees safety, with features like the thermostat control allowing for easy temperature adjustments. The high limit device ensures protection against overheating, making it a reliable choice for households.

  • Special Feature: UL listed. Energy-saving & easy installation.
  • Capacity: 4 Gallons
  • Material: Glass-lined tank
  • Dimensions: 11.75″W x 22″H
  • Weight: 20.7 pounds
CAMPLUX Mini Tank Electric Water Heater

Image & Product: Amazon

Key Features

  • Efficient insulation foam
  • Elegant streamline design
  • UL approved safety features
  • Easy temperature adjustments
  • Versatile mounting options

Compatible For

  • Under-sink installations
  • Independent or in-line installations
  • Kitchen or bathroom use

Where Need to Improve

  • Limited to 4-gallon capacity
  • Only available in white

The CAMPLUX ME40 Mini Tank Electric Water Heater is an ideal choice for those seeking an efficient and stylish water heating solution. Its safety features and energy-saving design make it a valuable addition to any home.


2. Bosch Electric Mini-Tank Water Heater Tronic 3000 T

Bosch’s Electric Mini-Tank Water Heater Tronic 3000 T is a testament to the brand’s commitment to quality and efficiency. With a 2.5-gallon capacity, this mini-tank is perfect for point-of-use applications, ensuring you get hot water exactly where you need it.

Its lightweight design makes it easy to mount, be it on a shelf, wall, or floor. The premium glass-lined material promises a long service life, and with a thermal efficiency of 98%, you’re assured of minimal energy wastage.

The fast recovery rate eliminates long waits, supplying hot water to up to two sinks simultaneously. Bosch’s reputation for quality is further solidified with a 6-year warranty on the unit and a 2-year warranty on parts.

  • Special Feature: Lightweight
  • Capacity: 2.5 Gallons
  • Material: Glass-lined
  • Dimensions: 13.75″W x 13.75″H
  • Weight: 15.5 pounds
Bosch Electric Mini-Tank Water Heater

Image & Product: Amazon

Key Features

  • 98% thermal efficiency
  • Quick recovery rate
  • Durable glass-lined material
  • Versatile mounting options
  • Long-lasting quality

Compatible For

  • Point-of-use applications
  • Dual sink supply
  • Wall or floor mounting

Where Need to Improve

  • Corded electric power source only

Bosch’s Electric Mini-Tank Water Heater Tronic 3000 T is a blend of efficiency and quality. Its fast recovery rate and durability make it a must-have for instant hot water needs.


3. Thermomate Mini Tank Electric Water Heater ES400

The Thermomate ES400 Mini Tank Electric Water Heater is a game-changer for those tired of waiting for hot water. With a 4-gallon capacity, this heater ensures instant hot water right at the point of use.

Its compact design allows for versatile installation options, either wall-mounted or on the floor. The adjustable thermostat offers three temperature levels, ranging from 50°F to 149°F, ensuring you get the right temperature every time.

Moreover, the glass-lined tank ensures durability and great insulation. The high-temperature limit protection and freeze mode further enhance its safety features, making it a reliable choice for any household.

  • Special Feature: Easy to Install
  • Capacity: 4 Gallons
  • Material: Glass-lined tank
  • Weight: 22.7 pounds
thermomate Mini Tank Electric Water Heater

Image & Product: Amazon

Key Features

  • Instant hot water provision
  • Adjustable temperature settings
  • Versatile installation options
  • High thermal efficiency (99%)
  • Premium quality build

Compatible For

  • Under-sink installations
  • Wall or floor mounting
  • Point-of-use applications

Where Need to Improve

  • Corded electric power source only

The Thermomate ES400 Mini Tank Electric Water Heater is an excellent choice for those seeking instant hot water solutions. Its adjustable temperature settings and high thermal efficiency make it a top pick.


4. Ariston Andris Mini-Tank Electric Water Heater

Ariston’s Andris 8 Gallon Mini-Tank Electric Water Heater is a testament to the brand’s commitment to quality and convenience. Designed to provide stored hot water right at the point of use, it ensures you no longer have to wait for hot water to reach your faucet.

Its compact design allows for easy installation, either wall-mounted or on the floor. The TitanShield technology ensures full protection against corrosion, while the robust environmentally safe insulation enhances energy efficiency.

  • Special Feature: TitanShield corrosion protection
  • Capacity: 8 Gallons
  • Material: Glass
  • Dimensions: 17.5″W x 17.5″H
  • Weight: 32.3 pounds
Ariston Andris 8 Gallon 120-Volt Point of Use Mini-Tank Electric Water Heater

Image & Product: Amazon

Key Features

  • Immediate hot water provision
  • TitanShield corrosion protection
  • Versatile installation options
  • Environmentally safe insulation
  • Long-lasting quality

Compatible For

  • Point-of-use applications
  • Wall or floor mounting
  • Commercial applications

Where Need to Improve

  • Requires hard wiring

The Ariston Andris Mini-Tank Electric Water Heater stands out for its efficiency and innovative features. Its TitanShield technology and immediate hot water provision make it a valuable addition to any space.


5. Eemax EMT1 Mini Tank Electric Water Heater

The Eemax EMT1 Mini Tank Electric Water Heater is a compact solution for those who desire instant hot water without the wait. With a 1.5-gallon capacity, this heater is perfect for point-of-use applications, ensuring you get hot water exactly where you need it.

Its adjustable temperature range from 50°F to 140°F allows for personalized settings. The wall and floor mountable design, combined with easy installation using a 120V outlet plug, makes it a versatile choice for any space. The inclusion of a T&P valve ensures safety and longevity.

  • Special Feature: Adjustable temperature range
  • Capacity: 1.5 Gallons
  • Material: Glass-lined tank
  • Dimensions: 11″W x 12.5″H
  • Weight: 13.5 pounds
Eemax EMT1 1.5-Gallon Mini Tank Electric Water Heater

Image & Product: Amazon

Key Features

  • Point-of-use application
  • Easy 120V outlet installation
  • Adjustable temperature settings
  • Wall and floor mountable
  • Included T&P valve

Compatible For

  • Under-sink installations
  • Wall or floor mounting
  • Point-of-use applications

Where Need to Improve

  • Battery-powered source only

The Eemax EMT1 Mini Tank Electric Water Heater is an efficient solution for those seeking immediate hot water. Its adjustable temperature and easy installation make it a top choice.


6. Stiebel Eltron SHC 2.5 Mini-Tank Electric Water Heater

Stiebel Eltron’s SHC 2.5 Mini-Tank Electric Water Heater is a testament to the brand’s commitment to quality and convenience. Designed to provide stored hot water right at the point of use, it ensures you no longer have to wait for hot water.

Its compact design allows for easy installation, either wall-mounted or on the floor. The glass-lined tank ensures durability and fast recovery. With a 6-year warranty on the tank, Stiebel Eltron promises longevity and reliability with this product.

  • Special Feature: Glass-lined tank
  • Capacity: 2.5 Gallons
  • Material: Glass
  • Dimensions: 11″W x 18.69″H
  • Weight: 15.9 pounds
Stiebel Eltron 233219 2.5 gallon

Image & Product: Amazon

Key Features

  • Immediate hot water provision
  • Glass-lined tank for durability
  • Wall-mounted with the included bracket
  • Fast recovery rate
  • 6-Year warranty on tank

Compatible For

  • Point-of-use applications
  • Wall mounting
  • Commercial applications

Where Need to Improve

  • Limited to 2.5-gallon capacity
  • Requires 110V outlet

The Stiebel Eltron SHC 2.5 Mini-Tank Electric Water Heater stands out for its efficiency and innovative features. Its glass-lined tank and immediate hot water provision make it a valuable addition to any space.


7. Rheem Mini-Tank Electric Water Heater

Rheem’s 2.5 Gallon Mini-Tank Electric Water Heater is a compact yet powerful solution for those who need efficient hot water on demand.

Designed for easy installation, this heater can be placed right where you need it, ensuring you always have hot water at your fingertips. The adjustable temperature control ranging from 50°-140°F allows for personalized settings.

The enameled glass-lined tank ensures extended life and durability. With its floor and wall mountable design, it offers versatility in installation.

  • Special Feature: Adjustable temperature control
  • Capacity: 2.5 Gallons
  • Material: Enameled glass
  • Dimensions: 11″W x 17″H
  • Weight: 17.6 pounds
Rheem Mini-Tank Electric Water Heater

Image & Product: Amazon

Key Features

  • Efficient 2.5-gallon capacity
  • Easy point-of-use hot water
  • Adjustable temperature control
  • Enameled glass-lined tank
  • Floor and wall mountable

Compatible For

  • Garages or outdoor kitchens
  • Wall or floor mounting
  • Recreational vehicles

Where Need to Improve

  • Electric power source only

The Rheem 2.5 Gallon Mini-Tank Electric Water Heater is a reliable choice for those seeking a compact yet efficient hot water solution. Its enameled glass-lined tank and adjustable temperature control make it a top pick.


Buying Guide of Mini Tank Water Heaters

Energy Efficiency

One of the primary reasons homeowners and businesses opt for mini-tank water heaters is their energy efficiency. These heaters provide hot water on demand, reducing the need to continuously heat and reheat water. This can lead to significant savings on your energy bills over time.

Size and Capacity

Consider the size and capacity of the heater. Depending on your needs, you might opt for a smaller 1.5-gallon tank or a larger 4-gallon one. Ensure the chosen size fits comfortably in the intended installation space, be it under a sink or in a closet.

Installation and Usage

Ease of installation is another factor to consider. Many mini-tank water heaters come with user-friendly installation kits, allowing for a hassle-free setup. Additionally, look for heaters with adjustable temperature settings to customize the water temperature to your liking.

Material and Durability

The material of the heater plays a vital role in its durability. Opt for heaters with glass-lined tanks as they offer excellent insulation and are resistant to corrosion. This ensures a longer lifespan and reduces the need for frequent replacements.

Safety Features

Safety should never be compromised. Look for heaters equipped with temperature and pressure relief valves. These features prevent overheating and excessive pressure build-up, ensuring safe operation.

Brand Reputation

While there are numerous brands in the market, it’s wise to choose a reputable one. Brands like Rheem, Ariston, and Bosch have earned trust over the years due to their commitment to quality and customer satisfaction..

Guidelines and Tips for Usage

For those considering a mini tank water heater, it’s essential to ensure its proper installation. Following the manufacturer’s guidelines can lead to optimal performance and safety. Speaking of safety, always be cautious.

Avoid placing the heater near flammable materials and ensure there’s adequate ventilation. Adjusting the temperature settings according to individual needs is also vital. It’s recommended to keep it at a moderate level to avoid scalding.

To ensure the heater runs efficiently for years, regular checks and minor tweaks in usage patterns can be beneficial.

How to Install Mini Tank Water Heaters Properly?

Installing a mini tank water heater can enhance your home’s hot water supply, providing instant warmth to specific areas. While the process is straightforward, following the right steps ensures safety and optimal performance. Here’s a step-by-step guide to help you through the installation:

Step 1: Choose the Right Place

Select a location close to the point of use, such as under a sink or near a shower. Ensure the spot is dry, free from moisture, and easily accessible for future maintenance.

Step 2: Mounting the Heater

Most mini tank water heaters can be wall-mounted or placed on the floor. If wall-mounting, use the provided bracket and ensure it’s securely fastened to a stud. If placing on the floor, ensure the surface is level.

Step 3: Connect Water Lines

Using the appropriate fittings, connect the cold water supply line to the inlet of the heater. Then, attach the hot water line to the outlet. Ensure all connections are tight to prevent leaks.

Step 4: Fill the Tank

Before connecting to power, fill the tank with water. Open the hot water tap to allow air to escape. Once water flows without air bubbles, the tank is full.

Step 5: Electrical Connections

Plug the heater into a grounded 120V outlet. If the model requires hardwiring, it’s recommended to hire a professional electrician to ensure safe and proper connections.

Step 6: Set the Temperature

Most mini tank heaters come with adjustable thermostats. Set your desired temperature, typically between 50°F to 140°F, depending on your preference.

Step 7: Check for Leaks

Once everything is connected, inspect all fittings and connections for any signs of water leakage. If you notice any, turn off the water supply and tighten the connections.

Step 8: Regular Maintenance

To ensure longevity and efficient performance, periodically check the heater for sediment build-up, especially if you have hard water. Draining and flushing the tank every few months can help prevent this.

Ideal Locations for Installation

Mini tank water heaters are versatile, making them suitable for various locations. They are a perfect fit for bathrooms, ensuring a continuous supply of hot water for showers.

Kitchens can also benefit immensely, with instant hot water aiding in cooking and cleaning. For those who love traveling, these heaters are a boon for campers and RVs.

Imagine having a hot shower in the middle of nowhere! Furthermore, they’re not just limited to residential settings.

Commercial spaces like restaurants and offices can also leverage their benefits, providing hot water for various needs.

Ensuring Longevity through Maintenance

To get the most out of your mini tank water heater, regular maintenance is key. Periodic checks can help identify potential issues before they escalate.

Cleaning the heater, especially in areas with hard water, can prevent mineral buildup, ensuring efficient functioning. If you come across any significant issues, it’s best to consult a professional rather than attempting DIY repairs.

As winter approaches, it’s essential to take preventive measures to avoid any damage due to freezing temperatures. Regular checks and timely interventions can ensure your heater serves you efficiently for years.