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Nessxa

Tankless Water Heater Electric 4500W Instant Hot Water Heater Under Sink, Point of Use Water Heaters with Digital Display for Kitchen Bathroom,110V

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Availability: In Stock.
Fulfilled by Amazon
Arrives Wednesday, Mar 25
Order within 17 hours and 27 minutes
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Style: 4KW


Features

  • STRONG PERFORMANCE & IPX4 WATERPROOF: The instant water heater under sink is equipped with a powerful 4.5KW heating system, ensuring a consistent supply of hot water for your entire household. It features a standard 1/2-inch NPT interface and an IPX4 waterproof rating, resisting moisture and splashes for safe, stable operation in damp environments like bathrooms. Powerful and reliable for everyday use.
  • SMART TOUCH TEMPERATURE CONTROL: Our instant hot water heater puts control at your fingertips with its intuitive, user-friendly digital touchscreen. You can easily set the temperature precisely between 86F - 131F (30C - 55C), meeting the different bathing needs of family members. The tankless water heater electric's screen displays the current water temperature in real time for added peace of mind.
  • WALL-MOUNTED & SPACE-SAVING DESIGN: The on demand hot water heater electric adopts a wall-mounted installation, saving floor space and making it especially suitable for compact bathrooms and kitchens. Its lightweight and compact body features a simple, modern design. Professional installation by licensed electricians and plumbers is recommended to ensure safe and reliable operation.
  • ALL-ROUND SAFETY PROTECTION: The instant hot water heater under sink features multiple safety protection mechanisms: leakage protection automatically cuts off power in case of abnormalities; over-temperature protection prevents excessively hot water by stopping heating when the outlet temperature exceeds 55C; freeze protection and dry burning prevention help extend the appliances service life.
  • WIDE APPLICABILITY & INSTANT HEATING: Our electric tankless water heater is suitable for apartments, rental homes, and small commercial spaces such as hair salons. Whether its a small bathroom, kitchen, or a secondary water point, it provides a stable supply of hot water. This electric hot water heater delivers hot water instantlyno waiting neededready to meet your immediate hot water demands anytime.

Description

Tankless Water Heater Electric 4500W Instant Hot Water Heater Under Sink, Point of Use Water Heaters with Digital Display for Kitchen Bathroom,110V

Brand: Nessxa


Power Source: ac


Product Dimensions: 8.66"W x 13.97"H


Special Feature: Anti-Freezing Protection, Dry Combustion Protection, Leak Detection, Lightweight


Color: White


Brand: ‎Nessxa


Product Dimensions: ‎8.66"W x 13.97"H


Special Feature: ‎Anti-Freezing Protection, Dry Combustion Protection, Leak Detection, Lightweight


Color: ‎White


Wattage: ‎4500 watts


Voltage: ‎110 Volts


Maximum Temperature: ‎131 Degrees Fahrenheit


Mounting Type: ‎Wall


Is Electric: ‎Yes


Manufacturer: ‎Nessxa


UPC: ‎631060185538


Item Weight: ‎5.79 pounds


Item model number: ‎RE45K


Item Package Quantity: ‎1


Special Features: ‎Anti-Freezing Protection, Dry Combustion Protection, Leak Detection, Lightweight


Included Components: ‎Accessory Kit, Instant Water Heater, Instruction Manual


Batteries Required?: ‎No


Date First Available: November 26, 2025


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Wednesday, Mar 25

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

  • Klarna Financing
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  • Financing through Apple Pay
Leasing options through Acima may also be available during checkout.

Learn more about financing & leasing here.

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Top Amazon Reviews

    • Hot water in a flash
Style: 4KW
This is a wonderful instant water heater that can places almost anywhere due to its compact size. Don’t let the size fool you, hot water as soon as you need it. It looks great and works well.
Reviewed in the United States on February 1, 2026 by NPat
    • Perfect for our garage sink
Style: 4KW
We purchased this for my garage so we could wash our dogs with warm water, and it’s been perfect. It heats up very fast and works great. It’s also really small and doesn’t take up much space at all. Simple yet very powerful.
Reviewed in the United States on January 20, 2026 by Yasmin
    • Great buy
Style: 4KW
Easy to install . Small design to fit most spaces . Works great. And it's very user friendly . 100% recommend it
Reviewed in the United States on January 28, 2026 by linett
    • Lo recomiendo
Style: 4KW
Un calentador muy bueno con mucha potencia calienta el agua 100% muy práctico y fácil para instalar
Reviewed in the United States on January 31, 2026 by Taimy davila
    • Hot Water On Demand
Style: 4KW
Living in a rental, I couldn’t install a traditional water heater, so I opted for this compact wall-mounted unit. Hot water comes instantly whenever I need it, with steady temperature control for both showering and washing dishes.
Reviewed in the United States on December 31, 2025 by karen karras
    • Surprisingly Powerful for Its Size
Style: 4KW
We use it as a point-of-use water heater for a secondary bathroom sink and it maintains consistent temperature even during continuous use. The safety features give me confidence, especially the auto shut-off protection. Installation was straightforward with the standard NPT fittings.
Reviewed in the United States on December 31, 2025 by Lisa Long
    • Great for Small Bathroom Installation
Style: 4KW
I installed this mini tank water heater in my powder room that previously had no hot water access. It was easy to mount on the wall behind the sink. The temperature control is intuitive and responsive. The IPX4 waterproof rating makes it safe for bathroom use. Much more affordable than running plumbing from my main heater! ... show more
Reviewed in the United States on December 31, 2025 by APW
    • Perfect for Kitchen Use
Style: 4KW
This mini tank water heater is a game changer in my kitchen! Installed under the sink, it takes almost no space and delivers hot water in seconds. No more waiting for the main water heater to reach the kitchen faucet. The digital display lets me set the perfect temperature for washing dishes or cleaning. I was worried about power draw, but it runs smoothly on my 110V outlet. Super convenient and efficient! ... show more
Reviewed in the United States on December 31, 2025 by Amazon Customer

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