Updated October 18, 2020 by Chris Gillespie

The 10 Best Mini Tank Water Heaters

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This wiki has been updated 12 times since it was first published in September of 2020. A mini tank water heater, often referred to as a point of use heater, is designed to service one sink and should be installed as close as possible to the faucet it is supplying to prevent heat loss. The tanks selected for this ranking are available in a range of sizes from simple hand washing models for washrooms, to larger kitchen units that provide hot water for washing up and cleaning. When users buy our independently chosen editorial selections, we may earn commissions to help fund the Wiki.

1. Ariston Andris

2. Stiebel Eltron 233219

3. FVSTR Smart Water Heater

Editor's Notes

October 15, 2020:

There are many methods of heating water in residential and commercial buildings. From large tanks that supply the entire property to tankless heaters that only heat water as needed. These mini-tank options have the benefit of storing hot water as close as possible to the point of service, which, depending on its size can provide piping hot water to your washroom, bathroom, or kitchen. They utilize a thermostatically-controlled heating element and can usually be plugged directly into a power outlet.

Smaller heaters, such as the FVSTR Smart Water Heater, the Funwill Household, and the Biselong Hot Water Heater are compact enough to be installed in a vanity unit or under a sink, however, they have a low water capacity and are best suited for washing hands. The latter can be used with a 110 Volt power supply making it suitable for use in an RV, too. The InSinkErator H-Wave-SN is another compact option that includes a dedicated faucet and has a 750-watt element, however, it will only supply a limited amount of hot water at a time. The Camplux ME25 and the Ariston Andris are both available in a range of sizes and feature glass-lined tanks, which have increased durability and high insulation properties.

If you need to supply a kitchen sink then a larger model would be more suitable as it will provide enough hot water for washing up and household cleaning. The Reliance 6 6 SOMS K has a six-gallon tank and a 4500-watt heating element, and is still only 15 inches high. The German-made Stiebel Eltron 233219 is available in three sizes up to six gallons, uses high-quality materials, and is backed by a six-year warranty. The largest selected for this ranking is the American Standard CE-12-AS, which has a foam insulated 12-gallon tank, however, it is larger than most other models at 22 inches in height, and needs to be mounted on the floor.

Special Honors

Rheem With a focus on sustainability and efficiency, Rheem has been designing heating and cooling products for almost 100 years. They manufacture a whole range of water heaters from small, point of use tanks to full-home hybrid systems. They can also recommend a trustworthy, local professional, so that you know the installation is in good hands. rheem.com

4. Biselong Hot Water Heater

5. American Standard CE-12-AS

6. Camplux ME25

7. FYLD Mini Heater

This item has been flagged for editorial review and is not available.

8. Reliance 6 6 SOMS K

9. InSinkErator H-Wave-SN

10. Funwill Household


Chris Gillespie
Last updated on October 18, 2020 by Chris Gillespie

Starting his career in the building industry, Chris built and managed a plumbing and heating company in northern England. After 13 years, seeking a more fulfilling lifestyle, he moved to southeast Asia, eventually settling in Vietnam, where he teaches writing and comprehension at a number of international universities. Drawing on his previous experience, and his passion for kitesurfing and windsurfing, Chris is knowledgeable in all things water related both recreationally and within the construction industry.


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