Mini tankless water heaters are a great option for those who want to enjoy hot water without wasting space, energy, or money. Unlike conventional water heaters, they do not store water in a large tank but heat it instantly as it flows through the device. They are perfect for small spaces, such as tiny houses, RVs, or cottages, where every inch counts. In this article, we will show you how mini tankless water heaters operate, what their advantages are, and how to select the best one for your situation.

Thermoflow 110V~120V Mini Tankless Water Heater

Experience the ultimate in on-demand hot water with the Thermoflow 110V~120V Mini Tankless Water Heater. Compact yet powerful, this sleek unit effortlessly delivers endless hot water as soon as you turn on the tap. No preheating is required—just pure efficiency at your fingertips.

Crafted with exceptional durability in mind, the maintenance-free bare wire heating system ensures instant hot water, boasting a remarkable 99% heating efficiency. The high-quality alloy bare heating element resists corrosion and acid, ensuring a longer lifespan for your unit.

Take advantage of the smart modulation system that adjusts power automatically, maintaining a stable output temperature regardless of flow rate or temperature settings. No more waiting for preheating, no more temperature fluctuations—just a consistent and enjoyable hot water experience.

Save up to 60% on water heating costs with this tankless wonder. Say goodbye to energy waste from distribution and storage losses and embrace a more eco-friendly solution. Perfect for sinks in kitchens, bars, schools, hospitals, communities, and salons, this mini water heater can be installed in tight spaces, either vertically or upside down. Check the specifications to ensure compatibility: 3.5 KW, 110–120 volts, and compact dimensions of 5.4 inches by 7.4 inches by 3.4 inches. Upgrade to efficiency with Thermoflow.

Pros

• Instant hot water without preheating.
• High efficiency and energy savings.
• Durable bare wire heating element.
• Smart modulation system for stable temperatures.
• Eliminates water heating costs.
• Compact and versatile for various installations.

Cons

• Limited to point-of-use for sinks only.
• It requires a specific voltage and breaker.
• Breakers areBreakers are not included.

DAORDAER Mini Electric Tankless Water Heater

Experience instant comfort with the DAORDAER Mini Electric Tankless Water Heater. Measuring 8.3 inches in width and 5.9 inches in height, this compact unit is a powerhouse, delivering 3000 watts of instant hot water, reaching up to 55 °C (131 °F) in just 3 seconds. The sleek white design with an LED display adds a touch of elegance to any space.

Control the temperature effortlessly with the convenient remote or touch screen, ensuring a seamless and safe adjustment without the need to wet your hands. This tankless water heater is not only stylish but also space-saving; it resembles a small suitcase and is easily mountable on the wall. The 99% thermal energy efficiency ensures it only heats water when needed, optimizing energy usage.

Installation is a breeze with the mini body designed for bathrooms, kitchens, and under sinks. The standard 1/2-inch interface allows direct connection to household hose connectors. Safety is paramount with features like high-temperature protection, dry heating protection, and electrical leakage protection, providing peace of mind for on-demand hot water. The electric and fluid systems are ingeniously separated to prevent both electric leakage and water pipe corrosion. Upgrade your space with the DAORDAER Mini Electric Tankless Water Heater for a constant flow of comfort.

Pros

• Instant hot water in just 3 seconds—no preheating required.
• Remote control and touch screen for convenient temperature adjustment.
• Compact and space-saving design.
• Highly energy-efficient, reducing utility bills.
• Easy installation with a standard 1/2-inch interface.
• Comprehensive safety features, including high-temp protection.

Cons

• Maximum temperature is limited to 55°C (131°F).
• May not be suitable for large households with high hot water demands.
• The initial cost may be higher compared to traditional water heaters.

Stiebel Eltron 231045 Mini 2 Point of Use Tankless Electric Water Heater

Compact and powerful, the Stiebel Eltron 231045 Mini 2 Point of Use Tankless Electric Water Heater is a space-saving marvel for your hot water needs. Boasting a sleek white design that can be mounted in plain sight, this 7.5-inch wide and 6.5-inch high unit is a subtle addition to any space.

Requiring a 20A circuit breaker, this corded electric water heater operates at 1800 watts, ensuring major energy savings without compromising on performance. With a minimum flow requirement of 0.21 gallons per minute (0.8 liters/min) and an internal restriction set at 0.32 gallons per minute, this unit is efficient and responsive.

Weighing just 3.44 pounds, its extremely compact design doesn’t just save space but delivers hot water on demand. The Stiebel Eltron Mini 2 comes with an impressive warranty, providing you with peace of mind: 7 years against leakage and 3 years against defects in workmanship and materials. Upgrade your hot water experience with this reliable and visually appealing tankless electric water heater.

Pros

• Space-saving design
• Sleek appearance
• Quick Activation
• Energy-efficient
• Long warranty

Cons

• Limited flow rate
• Specific electrical requirements
• Limited color options

FMATOZ Mini Electric Tankless Water Heater

Experience instant hot water with the FMATOZ Mini Electric Tankless Water Heater. Compact and efficient, this 4000-watt, 110-volt water heater provides a steady stream of hot water within 3 seconds, reaching up to 55 °C (131 °F) without any preheating. The ultra-slim design, available in sleek black, features both remote control and touch-screen operation for convenient temperature adjustments, ensuring a safe and hands-free experience.

Save space and energy with this wall-mountable heater, freeing up valuable floor space in your home. Its 99% thermal energy efficiency means it only heats water when needed, unlike traditional tank heaters that maintain temperature even when not in use. Easy to install in the bathroom, kitchen, or under the sink, it comes with a standard 1/2-inch interface for hassle-free connections to household hoses.

Equipped with high-temperature protection, dry heating protection, and electrical leakage protection, this tankless water heater guarantees a safe and worry-free hot water supply. The separation of electric and fluid systems prevents leakage and water pipe corrosion. Upgrade your comfort and relaxation with the FMATOZ Mini Electric Tankless Water Heater, a sleek, powerful, and space-saving solution for on-demand hot water in your home.

Pros

• Provides instant hot water within 3 seconds.
• Offers a remote control and touch-screen temperature adjustment.
• Space-saving and compact design.
• Highly energy-efficient, heating water only when needed.
• Easy installation in various locations.
• Multiple safety features for peace of mind.

Cons

• Requires a dedicated power line with at least 30 amps.
• May not be suitable for heavy-duty hot water demands.
• The initial cost may be higher than for traditional tank heaters.
• Limited to a maximum temperature of 55°C (131°F).

Krisy Hot Water Heater

Experience the luxury of instant and consistent hot water with the Krisy Hot Water Heater. Boasting a sleek black design, this corded electric heater is a powerhouse at 3000 watts, providing a seamless supply of hot water for your sink. The smart self-adjustment feature ensures a comfortable temperature without the risk of scalding, making every use a delight.

Engineered with eco-friendly efficiency, this water heater saves up to 55% on electric costs while promoting water conservation. The real-time power adjustment based on flow rate and temperature settings guarantees an ideal water temperature, eliminating the need for preheating. Embrace a greener lifestyle without compromising on performance.

Crafted with safety in mind, the Krisy Hot Water Heater undergoes rigorous testing for 100% assurance. The innovative design separates water and electricity lines to prevent leaks and scale buildup, ensuring durability and peace of mind. Perfect for winter hand washing, dishwashing, and face washing, say goodbye to lukewarm moments and hello to a reliable, energy-saving companion for your daily needs. Upgrade to the Krisy Hot Water Heater for a smarter, safer, and more efficient hot water solution.

Pros

• Instant and consistent hot water supply
• Energy-efficient, saving up to 55% on electric costs
• Eco-friendly, with no pollution or exhaust gas emissions
• Smart self-adjustment for optimal temperature
• Multiple safety features for peace of mind

Cons

• Limited to smaller water flow for optimal performance in cold weather

Buying Guide: Best Mini Tankless Water Heaters

Mini tankless water heaters, also known as point-of-use tankless water heaters, are small, compact units that heat water directly at the point of use rather than heating and storing water in a tank like traditional water heaters. Mini tankless units are ideal for providing hot water to remote fixtures like a bathroom sink, kitchen sink, or laundry room when installing a full whole-house tankless heater isn’t feasible.

Compared to small tank water heaters, mini tankless heaters are an energy-efficient alternative that can cut energy costs by up to 50%. They heat water only when needed, rather than maintaining a full tank of hot water. Mini tankless heaters also provide an endless supply of hot water on demand, so you’ll never run out, even during long showers or filling up the tub.

Key Benefits of Mini Tankless Water Heaters

Several benefits make mini tankless water heaters an attractive option compared to traditional water heater systems:

• On-demand hot water: Mini tankless heaters provide hot water instantly whenever you need it. There’s no waiting for a tank to refill and reheat. This also means you’ll never run out of hot water.
• Energy efficiency: Without the need to constantly maintain a tank full of hot water, mini tankless heaters use less energy—up to 50% less than a standard storage-tank water heater. This saves on energy costs.
• Compact size: Taking up about the same space as a small briefcase, mini tankless units are smaller than traditional tank heaters. Their compact size allows flexible installation in tight spaces.
• Longevity: With fewer components and no tank to corrode, mini tankless heaters can last up to 20 years, twice as long as the average tank water heater.
• Reduced risk of leaks: With no bulky storage tank, mini tankless water heaters eliminate the risk of leaks and flooding damage. They’re also easier to maintain without a tank.

Important Features to Consider

There are several important features and specifications to take into account when selecting a mini tankless water heater:

Power Source

Mini tankless heaters are powered by either electricity or gas. Electric models simply plug into a dedicated outlet, making them easier to install. Gas-powered units require professional installation and ventilation but are more energy-efficient overall. Consider your available power connections when deciding between electric and gas.

Flow Rate

Flow rate measures how many gallons of water a mini tankless heater can heat per minute. This determines the number of water sources/faucets the heater can handle simultaneously. Look for a flow rate that meets your household’s peak hot water needs.

Temperature Settings

You’ll want to select a model with adjustable temperature settings from around 100°F to 140°F. This allows you to fine-tune the water temp as needed for different uses.

Activation Flow

The activation flow is the minimum water flow rate needed for the unit to turn on and start heating. Lower activation flow is better so water doesn’t have to run excessively before heating. Look for models with activation flow of around 0.5 GPM.

Size and Installation Needs

Consider the available space for installation and any necessary venting requirements. Compact size is one of the advantages of mini tankless heaters, but the smaller the unit, the fewer taps it can supply hot water to simultaneously.

Conclusion

Mini tankless water heaters are a versatile, energy-efficient solution for providing hot water in homes and businesses. Key benefits include on-demand hot water, energy savings, and reliable performance. When selecting a mini tankless heater, be sure to consider power source, flow rate, activation flow, and temperature settings based on your household needs. With some upfront planning, installing a mini tankless heater can be a worthwhile upgrade over traditional water heaters.

Frequently Asked Question

What is a mini tankless water heater?

A mini tankless water heater is a compact and space-saving appliance that provides hot water on demand without the need for a storage tank. Unlike traditional water heaters, which store and continuously heat water, tankless heaters heat water instantly as it flows through the unit.

What are the advantages of using a mini tankless water heater?

Mini tankless water heaters offer several advantages, including energy efficiency, space savings, unlimited hot water supply, and longer lifespan compared to traditional tank-based water heaters. They also eliminate the standby energy losses associated with storage tank heaters, resulting in lower utility bills.

Where can mini tankless water heaters be installed?

Mini tankless water heaters are versatile and can be installed in various locations, including small apartments, RVs, boats, cabins, offices, workshops, and even in certain outdoor settings such as patios or garages. Their compact size allows for flexible installation options, such as under sinks or in tight spaces.

What factors should I consider when choosing a mini tankless water heater?

When selecting a mini tankless water heater, consider factors such as flow rate, temperature rise, energy efficiency, installation requirements, and safety features. Determine your hot water usage needs and ensure that the unit you choose can meet those demands while fitting within your space constraints.

Are mini tankless water heaters suitable for all climates?

Mini tankless water heaters can be suitable for various climates, but their performance may vary depending on factors such as incoming water temperature and desired hot water output. In colder climates, it’s essential to choose a unit with sufficient heating capacity to ensure adequate hot water supply, especially during peak demand times. Additionally, proper insulation and installation techniques can help maximize the efficiency of the heater in colder environments.