Are you looking for the small water heater? Do you know what to consider before buying one? Well, we’ve managed to put together a list of the best small water heater for your consideration. You can choose one and use it according to your needs.

In most cases, customers lack knowledge about market conditions, which leads to poor purchasing decisions. Fortunately, you have come to the right place as we will present you with a complete guide on how to select the small water heater for you. We have searched for hours and spent a lot of time and effort making sure you get a good return on your hard-earned money.

You can find a quick comparison and a list of the top small water heater below if you’re short on time.

Our Premium Picks!

EDITOR’S CHOICE
9.7
Bosch Electric Mini-Tank Water Heater Tronic 3000 T 4-Gallon (ES4) – Eliminate Time for Hot Water – Shelf, Wall or Floor Mounted

Bosch Electric Mini-Tank Water Heater Tronic 3000 T 4-Gallon (ES4) - Eliminate Time for Hot Water - Shelf, Wall or Floor Mounted

PREMIUM PICK
9.4
Bosch Electric Mini-Tank Water Heater Tronic 3000 T 2.5-Gallon (ES2.5) – Eliminate Time for Hot Water – Shelf, Wall or Floor Mounted

Bosch Electric Mini-Tank Water Heater Tronic 3000 T 2.5-Gallon (ES2.5) - Eliminate Time for Hot Water - Shelf, Wall or Floor Mounted

PREMIUM CHOICE
9.2
NOPTEG Tankless Electric Mini Water Heater – 110V Small Instant Hot Water Heater, Under Sink Plug in Water Heaters on Demand 3000W with LED Digital Display for Kitchen Bar Sinks

NOPTEG Tankless Electric Mini Water Heater - 110V Small Instant Hot Water Heater, Under Sink Plug in Water Heaters on Demand 3000W with LED Digital Display for Kitchen Bar Sinks

Best small water heater

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EDITOR’S CHOICE

Bosch Electric Mini-Tank Water Heater Tronic 3000 T 4-Gallon (ES4) - Eliminate Time for Hot Water - Shelf, Wall or Floor Mounted

Bosch Electric Mini-Tank Water Heater Tronic 3000 T 4-Gallon (ES4) – Eliminate Time for Hot Water – Shelf, Wall or Floor Mounted
9.8
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PREMIUM PICK

Bosch Electric Mini-Tank Water Heater Tronic 3000 T 2.5-Gallon (ES2.5) - Eliminate Time for Hot Water - Shelf, Wall or Floor Mounted

Bosch Electric Mini-Tank Water Heater Tronic 3000 T 2.5-Gallon (ES2.5) – Eliminate Time for Hot Water – Shelf, Wall or Floor Mounted
9.6
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PREMIUM CHOICE

NOPTEG Tankless Electric Mini Water Heater - 110V Small Instant Hot Water Heater, Under Sink Plug in Water Heaters on Demand 3000W with LED Digital Display for Kitchen Bar Sinks

NOPTEG Tankless Electric Mini Water Heater – 110V Small Instant Hot Water Heater, Under Sink Plug in Water Heaters on Demand 3000W with LED Digital Display for Kitchen Bar Sinks
9.1
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Electric Hot Water Heater 110-120V Small Compact Tank Storage,Rv Tr 2.5-3.0 Gallon Trailer , 1.5KW Kitchen Instant Under Sink Counter Cupboard, RV 1 PCs 16” Long 1/2”FIP Stainless Steel Water Hose Electric Hot Water Heater 110-120V Small Compact Tank Storage,Rv Tr 2.5-3.0 Gallon Trailer , 1.5KW Kitchen Instant Under Sink Counter Cupboard, RV 1 PCs 16” Long 1/2”FIP Stainless Steel Water Hose
8.6
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Stiebel Eltron 233219 2.5 gallon, 1300W, 120V SHC 2.5 Mini-Tank Electric Water Heater Stiebel Eltron 233219 2.5 gallon, 1300W, 120V SHC 2.5 Mini-Tank Electric Water Heater
8.4
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Bosch Electric Mini-Tank Water Heater Tronic 3000 T 7-Gallon (ES8) - Eliminate Time for Hot Water - Shelf, Wall or Floor Mounted Stiebel Eltron 233219 2.5 gallon, 1300W, 120V SHC 2.5 Mini-Tank Electric Water Heater
8.2
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110V-120V Electric Tank Hot 2.5 Gallon Water Heater Storage,Small Under Sink Counter RV TR 1.5KW Endless Trailer Kitchen Compact Point-of-Use,1 PCs 16” Long 1/2”FIP Stainless Steel Water Hoses 110V-120V Electric Tank Hot 2.5 Gallon Water Heater Storage,Small Under Sink Counter RV TR 1.5KW Endless Trailer Kitchen Compact Point-of-Use,1 PCs 16” Long 1/2”FIP Stainless Steel Water Hoses
7.7
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Ariston Andris 2.5 Gallon 6-Year 120-Volt Corded Point of Use Mini-Tank Electric Water Heater Ariston Andris 2.5 Gallon 6-Year 120-Volt Corded Point of Use Mini-Tank Electric Water Heater
7.5
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Marey GA5PORT Portable Propane Gas Tankless Water Heater, Small, White Marey GA5PORT Portable Propane Gas Tankless Water Heater, Small, White
7.1
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Thermoflow UT15 4 Gallons 110~120V Corded Electric Mini-Tank Water Heater Under Sink 110V ~ 120V, 1.5kW at 120 Volts Thermoflow UT15 4 Gallons 110~120V Corded Electric Mini-Tank Water Heater Under Sink 110V ~ 120V, 1.5kW at 120 Volts
6.6
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Bosch Electric Mini-Tank Water Heater Tronic 3000 T 4-Gallon (ES4) – Eliminate Time for Hot Water – Shelf, Wall or Floor Mounted

EDITOR’S CHOICE

Specifications:

Bosch Electric Mini-Tank Water Heater Tronic 3000 T 4-Gallon (ES4) - Eliminate Time for Hot Water - Shelf, Wall or Floor Mounted

$217.16  in stock
4 new from $217.16
1 used from $299.95
Free shipping
Amazon.com
as of May 23, 2022 8:15 am

Features

  • CONVENIENT HOT WATER HEATER: 4 gallon point-of-use mini-tank fits under your sink to provide hot water right where you need it. Thermal efficiency is 98%. Dimensions : 13.75 W x 13.75 H x 13.5 D Inches
  • LONG LASTING QUALITY: This electric water heater is easy to maintain and has premium glass-lined material for a long service life. (Amps 12A, Volts (VAC) 120)
  • INDEPENDENT INSTALLATION: 36-37" cord plugs into a 120 volt outlet for independent installation or in-line with a large hot water source
  • FAST RECOVERY RATE: Eliminates long waits for hot water at your sink, get on demand hot water at your every need (supplies up to 2 sinks at a time)
  • EASILY MOUNTED: Can be shelf, wall or floor mounted (bracket included); simply tap into the cold water line and install the water heater directly at the sink to provide hot water

Bosch Electric Mini-Tank Water Heater Tronic 3000 T 2.5-Gallon (ES2.5) – Eliminate Time for Hot Water – Shelf, Wall or Floor Mounted

PREMIUM PICK

Specifications:

Bosch Electric Mini-Tank Water Heater Tronic 3000 T 2.5-Gallon (ES2.5) - Eliminate Time for Hot Water - Shelf, Wall or Floor Mounted

$181.18  in stock
4 new from $181.18
Free shipping
Amazon.com
as of May 23, 2022 8:15 am

Features

  • CONVENIENT HOT WATER HEATER: 2.5 gallon point-of-use mini-tank fits under your sink to provide hot water right where you need it. Thermal efficiency is 98%. Dimensions : 13.75 W x 13.75 H x 10.75 D Inches
  • LONG LASTING QUALITY: This electric water heater is easy to maintain and has premium glass-lined material for a long service life. (Amps 12A, Volts (VAC) 120)
  • INDEPENDENT INSTALLATION: 36-37" cord plugs into a 120 volt outlet for independent installation or in-line with a large hot water source
  • FAST RECOVERY RATE: Eliminates long waits for hot water at your sink, get on demand hot water at your every need (supplies up to 2 sinks at a time)
  • EASILY MOUNTED: Can be shelf, wall or floor mounted (bracket included); simply tap into the cold water line and install the water heater directly at the sink to provide hot water

NOPTEG Tankless Electric Mini Water Heater – 110V Small Instant Hot Water Heater, Under Sink Plug in Water Heaters on Demand 3000W with LED Digital Display for Kitchen Bar Sinks

PREMIUM CHOICE

Specifications:

NOPTEG Tankless Electric Mini Water Heater - 110V Small Instant Hot Water Heater, Under Sink Plug in Water Heaters on Demand 3000W with LED Digital Display for Kitchen Bar Sinks

$85.90
$75.00
 in stock
2 new from $75.00
Amazon.com
as of May 23, 2022 8:15 am

Features

  • 3000W Tankless Electric Water Heater: eliminates long time waiting. It heats water as the water passes thru the unit, instant heating, so you can use the hot water as you like. It can't be used to bath.
  • Power Saving & Space Saving: The mini tankless water heater only 3KW/H, consume less than 1 USD a day! It is power saving used for sinks of kitchen, bar, toilet or living room. Install the compact water heater below the sink, saving you space under the sink.
  • Safe and Long Lasting: The small tankless water heater stops heating when no water flow, leakage, over-temperature, or inactive state. This electric water heater is easy to maintain and has 304 stainless steel heating material.
  • Easy to Install: Install the instant hot water heater under the bathroom or kitchen sink for washing dishes, food, clothes, faces and other functions. Wire requirements 2.5 square (#14 awg wire), breaker ≥30 amps, plug: 110V, water Pipe: 1/2 inch,
  • Note: The temperature is depend on Inlet water temperature, size of the water flow, body's perceived intensity and temperature difference. If you feel that the water heater is not heating up to your preferred temperature, try waiting seconds and turning down the water flow.

Electric Hot Water Heater 110-120V Small Compact Tank Storage,Rv Tr 2.5-3.0 Gallon Trailer , 1.5KW Kitchen Instant Under Sink Counter Cupboard, RV 1 PCs 16” Long 1/2”FIP Stainless Steel Water Hose

Specifications:

Electric Hot Water Heater 110-120V Small Compact Tank Storage,Rv Tr 2.5-3.0 Gallon Trailer , 1.5KW Kitchen Instant Under Sink Counter Cupboard, RV 1 PCs 16” Long 1/2”FIP Stainless Steel Water Hose

$125.98  in stock
Amazon.com
as of May 23, 2022 8:15 am

Features

  • 【SAFE DURABLE & LONGEVITY】304 Made of stainless steel and never rust,Anti-leakage plug,Multiple safety protection functions protect you from the risk of scald, leakage or other injury.Premium plastic shell is corrosion resistant,This mini hot water heater is ideal for kitchen, bar, school, hospital, community and RV.
  • 【SMART INVERTER FOR ENERGY SAVING】Digital Display,Automatic heat preservation and storage of hot water, 3.0 gallon point-of-use mini-tank fits under your sink to provide hot water right where you need it. Thermal efficiency is 98%,Maximum temperature167℉,The built-in smart chip heats up to the temperature you set, and automatically Insulation when heated to the specified temperature.
  • 【EASY TO USE】storage tank electric water heater with easy-to-operate knob temperature adjustment design,Easy to control warmth.Vent valve, Tee pipeline, pipes and other accessories are complete for quick installation without additional expenses or preparing time of accessories.
  • 【FAST RECOVERY RATE】Eliminates long waits for hot water at your sink, get on demand hot water at your every need (supplies up to 2 sinks at a time,8-15 minutes to heat to your desired temperature).
  • 【COMPACT DESIGN】Can be shelf, wall or floor mounted (Water inlet and outlet upward); Dimensions: 18.0''L x12.6''W x10.2''H; 8.86lbs; 1/2″NPT NPT. 1.5 kW, 110-120 volts. One-year warranty and 24H customer service support, feel free to contact us.

Stiebel Eltron 233219 2.5 gallon, 1300W, 120V SHC 2.5 Mini-Tank Electric Water Heater

Specifications:

Stiebel Eltron 233219 2.5 gallon, 1300W, 120V SHC 2.5 Mini-Tank Electric Water Heater

$219.00
$208.13
 in stock
14 new from $190.49
Free shipping
Amazon.com
as of May 23, 2022 8:15 am

Features

  • Plugs into standard 120 volt outlet
  • T and P valve included
  • Wall-mounted with included bracket
  • Glass-lined tank and fast recovery
  • 6-Year warranty on tank

Bosch Electric Mini-Tank Water Heater Tronic 3000 T 7-Gallon (ES8) – Eliminate Time for Hot Water – Shelf, Wall or Floor Mounted

Specifications:

Bosch Electric Mini-Tank Water Heater Tronic 3000 T 7-Gallon (ES8) - Eliminate Time for Hot Water - Shelf, Wall or Floor Mounted

$219.25  in stock
2 new from $219.25
3 used from $196.34
Free shipping
Amazon.com
as of May 23, 2022 8:15 am

Features

  • CONVENIENT HOT WATER HEATER: 7 gallon point-of-use mini-tank fits under your sink to provide hot water right where you need it. Thermal efficiency is 98%. Dimensions : 17.5 W x 17.5 H x 14.5 D Inches
  • INSTALLED VERTICALLY OR HORIZONTALLY: This larger model can be mounted vertically (5.1 gal. of water supply) or horizontally (7 gal. of water supply)- vertical orientation is installed with the cold and hot lines on top of the unit
  • RELIABLE WATER SOURCE: Easily hard-wire the 7-gallon model to provide the on-demand reliable water source your home or office needs
  • IMPORTANT INFORMATION: Heating capacity of 1440 watts and a temperature range of 65-145°F max. Operating pressure-150 psi. Water fittings-3/4 inch Male NPT. Electrical requirements (Amp 12A/Volts 120)
  • EASILY MOUNTED: Can be shelf, wall or floor mounted (bracket included for vertical orientation only); simply tap into the cold water line and install the water heater directly at the sink to provide hot water

110V-120V Electric Tank Hot 2.5 Gallon Water Heater Storage,Small Under Sink Counter RV TR 1.5KW Endless Trailer Kitchen Compact Point-of-Use,1 PCs 16” Long 1/2”FIP Stainless Steel Water Hoses

Specifications:

110V-120V Electric Tank Hot 2.5 Gallon Water Heater Storage,Small Under Sink Counter RV TR 1.5KW Endless Trailer Kitchen Compact Point-of-Use,1 PCs 16” Long 1/2”FIP Stainless Steel Water Hoses

$124.98  in stock
Amazon.com
as of May 23, 2022 8:15 am

Features

  • 【SAFE DURABLE & LONGEVITY】Made of stainless steel and never rust,Anti-leakage plug,Multiple safety protection functions protect you from the risk of scald, leakage or other injury.Premium plastic shell is corrosion resistant,This mini hot water heater is ideal for kitchen, bar, school, hospital, community and RV.
  • 【SMART INVERTER FOR ENERGY SAVING】Automatic heat preservation and storage of hot water, 2.5 gallon point-of-use mini-tank fits under your sink to provide hot water right where you need it. Thermal efficiency is 98%,Maximum temperature149℉,The built-in smart chip heats up to the temperature you set, and automatically Insulation when heated to the specified temperature.
  • 【EASY TO USE】storage tank electric water heater with easy-to-operate knob temperature adjustment design,Easy to control warmth.Vent valve, Tee pipeline, pipes and other accessories are complete for quick installation without additional expenses or preparing time of accessories.
  • 【FAST RECOVERY RATE】Eliminates long waits for hot water at your sink, get on demand hot water at your every need (supplies up to 2 sinks at a time,8-15 minutes to heat to your desired temperature).
  • 【COMPACT DESIGN】Can be shelf, wall or floor mounted (Water inlet and outlet upward); Dimensions: 13.0''L x11.4''W x10.6''H; 9.5lbs; 1/2″NPT NPT. 1.5 kW, 110-220 volts. One-year warranty and 24H customer service support, feel free to contact us.

Ariston Andris 2.5 Gallon 6-Year 120-Volt Corded Point of Use Mini-Tank Electric Water Heater

Specifications:

Ariston Andris 2.5 Gallon 6-Year 120-Volt Corded Point of Use Mini-Tank Electric Water Heater

$159.99  in stock
Amazon.com
as of May 23, 2022 8:15 am

Features

  • Compact design; wall or floor mounted (wall bracket included)
  • Provide immediate hot water at the point of use; install as booster or standalone
  • Easy installation; installs right at the point of use with water connection and standard 110/120 Volt outlet
  • 6-year limited warranty on tank, 2-year warranty on parts
  • TitanShield exclusive technology that fully protects inner surface against corrosion; robust environmentally safe insulation increases energy efficiency

Marey GA5PORT Portable Propane Gas Tankless Water Heater, Small, White

Specifications:

Marey GA5PORT Portable Propane Gas Tankless Water Heater, Small, White

$199.00  in stock
5 new from $199.00
Amazon.com
as of May 23, 2022 8:15 am

Features

  • Naturally vented outdoors: you don't need to buy a extra venting
  • Serves to a variety of applications, since washing your car, windows cleaning, wash your horse or your dog and take a hot shower
  • Perfect for campsites, cabins, remote areas or just around the house. BTU/h - 35000 BTU/h. Fuel Type - LPG(liquid propane gas). pipe fittings - 1/2 inch NPT, incoming/outgoing water and gas
  • Provide endless hot water on demand only as needed
  • No electrical connection is required

Thermoflow UT15 4 Gallons 110~120V Corded Electric Mini-Tank Water Heater Under Sink 110V ~ 120V, 1.5kW at 120 Volts

Specifications:

Thermoflow UT15 4 Gallons 110~120V Corded Electric Mini-Tank Water Heater Under Sink 110V ~ 120V, 1.5kW at 120 Volts

$179.99  in stock
Amazon.com
as of May 23, 2022 8:15 am

Features

  • ➤ 4 GALLON CAPACITY - 4 gallon point-of-use mini-tank fits under your sink to provide hot water right where you need it. Stainless steel tank and heating element designed for efficiency, durability and long life service (Relief Valve has been upgraded)
  • ➤ Save Energy - Low stand-by loss power consumption. With Advanced Thermostop Technology of Germany, stop heating or reheating automatically when the water heater reaches a high or low set temperature
  • ➤ EPS FOAMING TECHNOLOGY - Heating water quickly and better insulation, fast recovery rate eliminates long waits for hot water at your sink
  • ➤ SAFE & RELIABLE - over-heat protection, auto cut-off electricity if not hot water come out, IPX24 water proof, 2.6ft plug in cord, suit for kitchen, bathroom, bar, school, hospital, office and RV.
  • ➤ NOTES - Please verify that this model is the right size for your hot water needs and electrical requirements before purchase & installation. Dimensions: 18H x 12.2W x 11D inches; Weight: 14 lbs; Water connections: 1/2 inch NPT, Electrical requirements: 1.5 kW, 120 Volts. Max pressure: 150PSI. Nominal current: 13A.