Point-of-Use Electric
Mini-Tank Water Heaters

Small in size but large in benefit and energy savings

A. O. Smith point-of-use electric mini-tank water heaters are the perfect option for those looking to provide hot water for a single application. They are installed near fixtures to reduce wait time and waste, and in return they provide hot water quickly and efficiently. Small in size, point-of-use electric water heaters are specifically designed to fit in even the smallest spaces where other types of water heaters can’t.

A Closer Look

Diagram of a mini-tank water heater.

How do point-of-use electric mini-tank water heaters work?

Point-of-use electric mini-tank water heaters are installed for single applications and small load requirements. Common use cases include under sinks, in small apartments, and in room additions and garages. Since the hot water does not have to travel far, hot water is provided almost immediately dependent on the flow rate and tank size.

During installation, the unit is connected directly to a cold water source. The cold water fills the tank, and an electric heating element heats the water to the set temperature until ready for use. When a faucet is opened, the heated water is released. Due to their small size, point-of-use electric mini-tank water heaters are not equipped to handle large demands and will run out of hot water at quicker rates than traditional tank water heaters. During high demand usage, if the hot water runs out the unit works quickly to reheat the cold water that was introduced into the tank.

The gallon capacity needed when purchasing a point-of-use water heater is dependent on the application. You will need to understand the flow rate of the fixture needing hot water. These tanks range in storage capacity from 3 to 7 gallons (nominal). An install to service a shower will require a larger demand than a single faucet.

Point-of-use water heaters were designed for single-use applications, such as a single, low-flow shower or one to two sink/faucet installations. Most installs are in small homes, apartments, garages and mobile homes or where the application site is far away from the main water heating source.

There are two types of point-of-use electric water heaters: mini-tank and tankless. Mini-tank water heaters preheat reserved water until ready for use, providing a quick immediate supply that can run out in high demand periods of use. Tankless water heaters heat water on demand as it travels through electrical heating components within the system, providing a continuous flow of heated water.

Bigger Needs? Consider a Whole House Electric Tank

Discover what whole-house electric tank water heater is right for your home. Compare energy efficiency,
warranty length, and more.

Learn About Whole-House Electric Tank Water Heaters >

Benefits of Point-of-Use Electric Water Heaters

  • Children washing hands.

    Fast Delivery

    Provides minimal wait time to meet your hot water needs.

  • Filling a glass of water.

    Energy Savings

    Installing a point-of-use water heater near each faucet eliminates the waste of unused hot water in long water lines between a centrally located water heater and each faucet, delivering hot water more quickly and reducing energy costs.

  • Father brushing teeth with daughter.

    Space Saving

    Conveniently designed to fit in compact spaces within your home or business.

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Additional Reading

Contractor Resources

  • Screwdriver and wrench icon.

    Installation Guide

    Download our electric tank water heater installation instructions.

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    Resource Guide

    Match the flow rate to your customer’s needs.

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    Cross Reference Tool

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