Heatnex

america's best rated

australia's best rated

Canada's best rated

Under Sink Water Heaters

Instant point-of-use heating | Compact, space-saving design

On-Demand Instant Hot Water

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 Warranty

1 Year Warranty

Support

24/7 Customer Support

Continuous hot water exactly when you need it with Heatnex

Tired of Waiting for Hot Water?

Heatnex heats water the instant it flows through the unit. Say goodbye to shivering while waiting for a bulky tank to warm up, and enjoy immediate hot water on demand.

Struggling with Inconsistent Temperatures?

Our premium 304 stainless steel heating core features a 3D rotary design that guarantees rapid, uniform heat transfer. No cold spots, just steady, continuous warmth.

Want Full Control Over Your Comfort?

The front-facing LED touch control panel lets you adjust water temperature between 20°C and 55°C with a single touch. Easily recall your favorite preset for personalized comfort.

Over 10,000 Happy Homeowners Trust Heatnex For Instant Hot Water.

Heatnex Under Sink Water Heaters US8
Heatnex Under Sink Water Heaters US8
Heatnex Under Sink Water Heaters US8
Heatnex Under Sink Water Heaters US8
Heatnex Under Sink Water Heaters US8
Heatnex Under Sink Water Heaters US8
Heatnex Under Sink Water Heaters US8
Heatnex Under Sink Water Heaters US8
Heatnex Under Sink Water Heaters US8
Heatnex Under Sink Water Heaters US8
Heatnex Under Sink Water Heaters US8

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100% SECURE PAYMENT

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1 YEAR WARRANTY

4.8 rating based on total orders

Experience The Luxury Of On-demand Hot Water With Effortless Installation.

The Heatnex under-sink tankless design fits seamlessly into kitchens, bathrooms, or cabins. Get high-efficiency heating without wasting water or space.

Super Fast 3D Rotary Heating System

Adjustable Temperature (20°C to 55°C)

Compact, Space-Saving Wall Mount

Advanced Multiple Built-In Safety Protections

Tankless Design Electric Flow Heater
$257.99 USD
$258.00 USD

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1 YEAR WARRANTY

One Year Warranty means that the Products are free from defect in material and workmanship. At its option, replace the product in question if it is proven to be defective from normal operating conditions or provide a refund instead of replacing such Product.

Heatnex

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WHY CHOOSE Heatnex

Why Homeowners Trust Heatnex for Instant Hot Water Solutions.

Instant & Endless Hot Water

No storage limit. Generates endless hot water the second you turn on the faucet, saving time and reducing water waste.

Intuitive LED Touch Display

Large, clear temperature readings with precise [+] and [-] adjustments let you find your perfect temp in seconds.

Saves Space & Energy

Its compact tankless structure mounts directly under the sink, freeing up valuable cabinet space and using energy only when water runs.

3D Rotary Heating Element

A premium 304 stainless steel heating coil maximizes contact with the water stream for uniform, high-efficiency heat transfer.

Safe & Reliable Operation

Equipped with advanced multi-layer safety protections including over-temperature safety cutoffs and leakage prevention.

Versatile Application

Perfect for kitchen sinks, bathroom vanities, bar areas, tiny homes, cabins, and localized shower setups.

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What's included with your Heatnex?

Under Sink Water Heater (No Shower Head)

Accessories

User Manual

Packaging Box

Learn More About Heatnex

Frequently Asked Questions

Can Heatnex be installed under any sink?

Yes! Its compact, tankless design is specifically engineered to fit under kitchen sinks, bathroom basins, utility sinks, or bar areas easily.

What are the power requirements?

Heatnex operates on a 220V power supply and ranges between 3000W and 5500W to ensure rapid, consistent heating.

What is the temperature range?

You can precisely adjust the temperature between 20°C and 55°C using the front LED touch panel.

Is the heating core durable?

Very durable. It utilizes a premium 304 stainless steel heating core with a 3D rotary heating design to prevent limescale build-up and corrosion.

Does it heat water instantly?

Absolutely. The Heatnex starts heating immediately when water flows through, delivering endless hot water on demand with no pre-heating required.

Is it safe to use?

Yes, it is highly safe. It features advanced built-in protections, including leakage protection, over-temperature protection, and dry combustion prevention.

Does this water heater require a tank?

No, Heatnex is a 100% tankless instant water heater. It only heats water when you turn on the faucet, saving both space and energy.

Do I need professional installation?

While the physical mounting is straightforward, we highly recommend having a licensed plumber or electrician perform the connection to ensure compliance with local electrical codes.

24/7 Customer Support

Our award-winning customer support team is ready 7 days a week to answer your inquiries by email. Just send us a message and we'll be happy to help you.

Customers share their experiences

Trusted by Thousands of Satisfied Customers

Eric F.

✔️ Verified Buyer

Really happy with this tankless water heater. It is compact design and does not take up much space. Warm to Hot water is ready in just a few seconds. Installation was simple, and the instructions were clearly provided. This is perfect for an under-sink kitchen or utility sink.

Lynn H.

✔️ Verified Buyer

This is an excellent, compact unit for an under-sink application or a garage shop setup. It delivers hot water almost instantly, which is perfect for handwashing or doing small batches of dishes. The digital display is bright and makes monitoring the exact output temperature super easy. The build quality feels solid, and its small footprint fits neatly under the counter without eating up valuable storage space.

Jackson R.

✔️ Verified Buyer

Easily connects to the pipes, plugged into a regular socket. I bought this to have an outdoor shower for my swimming pool. I’ll have to do is turn the water on hit the own button on the small heater, and instantly I’ve got warm water to shower before and after going into the swimming.

Joyce F.

✔️ Verified Buyer

This water heater works perfectly! It heats the water very quickly and maintains a stable temperature. It’s compact, easy to install, and doesn’t take up much space. The digital display is clear and very convenient. Great quality for the price, and it performs exactly as expected. I highly recommend it!

Anna H.

✔️ Verified Buyer

I put the heater in my camper as it was over 500 and a pain to replace the stock gas one. I install it above my toilet and was easy to plumb and plug into my vanity outlit. I just turn it on high and run the first gallon into a bucket then shower until water turns warm then add some to the bucket then turn the water off at the shower head suds up shave after 5 min it's running hot again I rinse and use the bucket water to fi fish. I'm getting a better hot shower then the stock propane heater ever did and saving a lot of propane

Michael R.

✔️ Verified Buyer

It used to take about 3 to 4 minutes to get hot water, now, count 1, 2, ohhhhh damn that’s hot. Placed shower rods along both sides to put spray bottle’s. Makes up for the lost space due to the water heater. Make sure you have access to electricity. Wife loves the instant hot water. Happy wife, happy life. Oh, one last thing, if you have a sink (Moen) that has a proprietary connector you will have to get a male to male coupler for the hoses.
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