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Best under sink water heaters - Holiday Sale 2025

Last Updated - December 14, 2025

1
Best Choice
15% Off

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Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

InSinkErator
15% Off

InSinkErator H-HOT150SN-SS Instant Hot Water Dispenser System with Stainless Steel Tank, Satin Nickel

InSinkErator

$267.35

$317.36
(15% Off)

More Details
Main highlights
- We come to you 1-year in-home limited
- Tool-free tank connections and dry-start protection to ease installation
- Includes Satin Nickel finish instant hot water dispenser and unique Hot100 2/3 gallon stainless steel hot water tank
- Easy-to-adjust temperature control. Spout height-6.25 inch. Spout Reach-5.38 inch
- Delivers up to 60 cups/hour of 200 degree f near-boiling water
$267.35
$317.36 (15% Off)
2

✖
Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

Rheem

Rheem 3.5kW 120V Point of Use Thermostatic Tankless Electric Water Heater

Rheem

$260.85

More Details
Main highlights
- SAVES SPACE: Ideal for low flow point-of-use applications, such as in a bathroom, office breakroom, wet bar, or garage. The compact size of the water heater is up to 98% smaller than a standard electric water heater.
- INSTALLATION: Designed to be mounted in an upright position with the inlet and outlet water connections at the bottom of the unit for ease of installation with no venting required.
- ELECTRICAL REQUIREMENTS: 1 x 30 AMP Double Pole Breaker Required. Product installation hard wired to 120 volts requiring a 30-amp breaker.
- EASILY ADJUSTABLE: Thermostatic temperature controls in 1-degree increments ranging from 80 to 140 degrees Fahrenheit for on-demand, consistent hot water.
$260.85
3
Best Value
13% Off

✖
Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

Bosch
13% Off

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

$209.65

$241.00
(13% Off)

More Details
Main highlights
- Wattage: 1440.00 W
- 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
- 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
$209.65
$241.00 (13% Off)
4

✖
Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

Feelrogast

Electric Tank Water Heater, 8-Gallon Under Sink Instant Hot Water Tank，Equipped with Digital Temperature Display for RV, Camper, Kitchen, Food Truck，Wall or Floor Mounted, Black

Feelrogast

$229.99

More Details
Main highlights
- 【Wide-Ranging Applications】: Available in 4-gallon (13.39"×11.84"×14.17") and 8-gallon (16.93"×14.17"×17.72") models, this under sink water heater supports wall, under-sink, or floor mounting, providing hot water wherever it’s needed--in your kitchen, bathroom, RV, and any other location.
- 【Upgraded T&P Relief Valve】: Engineered for safety, our upgraded T&P Relief Valve automatically releases excess pressure. This crucial feature prevents damage to the electric water heater and ensures reliable operation under all water conditions, giving you complete confidence in its reliable performance.
- 【Precision Digital Temperature Display】: Our water heater is equipped with a clear digital screen. You can monitor the water temperature in real-time and make precise adjustments instantly. Digital display ensures a reliably comfortable and safe experience in everyday life.
- 【Instant Hot Water & Precision Control】: This instant electric water heater delivers 99% thermal efficiency, so you can enjoy hot water instantly and say goodbye to the long wait times of traditional water heaters. With precise temperature control (86°F-167°F), you can customize the warmth to your exact preference.
- 【Certified for Safety and Durability】: This portable water heater is certified by CE, ROHS, and FCC, guaranteeing family electrical safety. It features a double-layer enamel coating, 0.07-inch medical-grade 316 stainless steel, an integrated PU foam insulation layer, and an impact-resistant outer shell to prevent cracking, rust, and leakage, offering superior long-term performance.
$229.99
5

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Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

thermomate

Electric Mini Tank Water Heater UL Listed, ThermoMate 2.5 Gallons Small Under Sink Water Heater for Point of Use Instant Hot Water 110V 120V, Wall or Floor Mounted, ES250

thermomate

$195.99

More Details
Main highlights
- 【UL Listed Safety Protection】- thermomate tank water heater was UL certified, including an ASME, ANSl and CSA (AGA) approved T&P valve to protect water heaters from excess pressures and temperatures
- 【Specifications and Warranty】- Dimensions: 12.95"H x 12.95"W x 11.5"D; Weight: 15.4 lbs; Electrical requirements: 1440W at 120 volts, plug-in connection with 2 feet power cord; Max water pressure: 150PSI; Nominal current: 12A. 3-year Limited Warranty for the tank, 1-year warranty for parts and 24hours customer service
- 【No Wait for Hot Water】- 2.5 gallons water heater provides instant hot water on demand with fast recovery, 1440W 120V Plug in to use. Adjustable temperature range from 50°F to 149°F. 50% increase in thermal insulation with 30mm thick overall CFC-Free polyurethane to keep the warmth of hot water for longer time
- 【Long Lasting Constructed】 - 10,000 times impulse test, 3-layer tank with fused porcelain enamel glass lining, efficiently against corrosion, rust, and leaks, avoiding scale buildup. Extra thick anode rod sustaining high heating efficiency for a long time
- 【Incoloy 800 Stainless Steel Heating Element】- 4 times resistant to corrosion, better corrosion resistance performance and more efficient than copper under high temperature & pressure conditions, heating efficiency up to 99%, thus has a longer life span and energy saving
- 【Easy Installations】- compact small water heater, can be wall or floor mounted under sink / counter / cabinet, 1/2" NPT water connection, plug into a standard 120V outlet. An ideal hot water heater for kitchen & bathroom sink, RV & boat, vacation cabin & camper, food truck, garage & barn, shop & salon
$195.99

Best under sink water heaters - Holiday Sale 2025

InSinkErator H-HOT150SN-SS Instant Hot Water Dispenser System with Stainless Steel Tank, Satin Nickel

Rheem 3.5kW 120V Point of Use Thermostatic Tankless Electric Water Heater

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

Electric Tank Water Heater, 8-Gallon Under Sink Instant Hot Water Tank，Equipped with Digital Temperature Display for RV, Camper, Kitchen, Food Truck，Wall or Floor Mounted, Black

Electric Mini Tank Water Heater UL Listed, ThermoMate 2.5 Gallons Small Under Sink Water Heater for Point of Use Instant Hot Water 110V 120V, Wall or Floor Mounted, ES250

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