ThermoJet

britain's best rated

Instant Hot Water Heaters

Enjoy Endless, Energy-Efficient Hot Water On Demand with ThermoJet Instant Water Heater

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1 Year Warranty

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A high-efficiency tankless water heater engineered for instant household comfort.

Tired of wasting energy and waiting for hot water?

The ThermoJet instant water heater eliminates the wait. Because it has no bulky built-in storage tank, it heats water on demand only when the valve is opened and stops automatically when closed. This advanced tankless design helps you dramatically cut down on electricity and water bills.

Struggling with bulky appliances in tight spaces?

Enjoy a clean, spacious bathroom or kitchen. The ThermoJet is exceptionally practical and space-saving, mounting vertically with direct 1/2-inch threaded connections. Built with a premium cast aluminum heater and IPX4 waterproof rating, it delivers powerful water pressure support from 0.04 to 1.2 MPa safely.

Want precise control over your daily comfort?

Get customized warmth tailored for any season. With 3000W and 5500W versions available, you can choose the ideal setup for summer efficiency or winter power. Easily fine-tune your target temperature from 30°C to 55°C using the sleek touch panel or wireless remote control.

Over 10,000 Households Enjoying Instant, Endless Hot Water On Demand.

ThermoJet Instant Hot Water Heaters UK44
ThermoJet Instant Hot Water Heaters UK44
ThermoJet Instant Hot Water Heaters UK44
ThermoJet Instant Hot Water Heaters UK44
ThermoJet Instant Hot Water Heaters UK44
ThermoJet Instant Hot Water Heaters UK44
ThermoJet Instant Hot Water Heaters UK44
ThermoJet Instant Hot Water Heaters UK44
ThermoJet Instant Hot Water Heaters UK44
ThermoJet Instant Hot Water Heaters UK44
ThermoJet Instant Hot Water Heaters UK44
ThermoJet Instant Hot Water Heaters UK44
ThermoJet Instant Hot Water Heaters UK44

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1 YEAR WARRANTY

4.8 rating based on total orders

Customizable Settings And Safety-first Engineering For Daily Household Use.

The ThermoJet Instant Water Heater is designed to provide immediate hot water without the high energy footprint of old storage tanks. With intuitive gear adjustments, a wireless remote control, and a durable cast aluminum heating element, it represents the modern standard for domestic water heating.

Dual power configurations (3000W / 5500W)

Smart touch panel & remote control operation

Durable cast aluminum heater core with IPX4 waterproofing

Wide water pressure support (0.04–1.2 MPa)

Precise custom temperature controls ranging from 30°C to 55°C
£237.99
£238.00

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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.

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Why Choose ThermoJet

Why modern homeowners are upgrading to the ThermoJet heater

Dual Power Modes

Available in 3000W and 5500W setups. Run 3000W for energy-efficient summer use, or utilize the 5500W model to handle cold winter conditions easily.

Ultra-Compact Footprint

Its tankless structure mounts directly to the wall vertically, saving premium cupboard and room space in bathrooms or utility areas.

Durable Cast Aluminum Heating

Engineered with a high-durability cast aluminum core that prevents scaling and blockages, keeping heating performance high for years.

On-Demand Heating

Automatically begins heating the moment you open the water valve, and shuts off instantly when closed, eliminating standby heat losses.

Precise Temperature Settings

Supports custom temperature settings from 30°C to 55°C. Change your preferences with a quick touch on the screen or with the remote.

Robust Safety Features

Equipped with an IPX4 waterproof rating, 1/2-inch thread connection, and handles high pressure range of 0.04 to 1.2 MPa.

IMAGE GALLERY

What's Included in the ThermoJet?

Instant Hot Water Heaters

Remote Control

User Manual

Packaging Box

Learn More About ThermoJet

Frequently Asked Questions

How does the ThermoJet water heater heat instantly?

The ThermoJet is a tankless water heater that utilizes an integrated high-efficiency cast aluminum heating element. When you open your water valve, the flow trigger automatically engages the heating system. When closed, it immediately stops heating, preventing standby energy waste.

Which version is right for me, 3000W or 5500W?

ThermoJet is available in both 3000W and 5500W variants. The 3000W model is ideal for summer climates or warmer areas, as it requires less electrical draw. The 5500W model is best suited for cold winter months or cooler regions where incoming groundwater requires more power to heat.

What if the water isn't reaching my set target temperature?

Water temperature is directly tied to the flow rate, power output, and incoming water temperature. If the target temperature cannot be reached, simply reduce the water flow rate slightly at your faucet or shower head until the heater has enough contact time to warm the water effectively.

Can this unit be mounted in any orientation?

No. The ThermoJet water heater must be installed strictly in a vertical orientation and connected directly without any adapters. It is essential to test with water running through the unit before turning on the power.

Is it safe to use in damp bathroom environments?

Yes! ThermoJet features an IPX4 waterproof rating, which means it is fully protected against water splashes from any direction, making it safe and durable for bathroom and kitchen sink settings.

How do I make adjustments to the heat?

You can configure your settings from 30°C to 55°C easily. Use the touch panel directly on the face of the heater or make quick adjustments from a distance with the included wireless remote control.

Are there any precautions for freezing climates?

Yes. Avoid powering on the water heater in freezing conditions. Always turn on the water line first before engaging electrical power to prevent damage to the internal cast aluminum element.

What is the product warranty?

The product comes with a 1-year warranty. Returns and exchanges are supported within 30 days. Customers can feel secure using the product.

24/7 Customer Support

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

Customers share their experiences

Trusted by Thousands of Satisfied Customers

Brooks A.

✔️ Verified Buyer

The clear instructions made the initial prime and startup simple. Within seconds of turning it on and letting the water run, I had hot water and I mean HOT water!

Tyler M.

✔️ Verified Buyer

​The temperature control is incredibly effective. Even on a chilly morning, I was able to dial in a perfect, consistent temperature for a shower. The flow rate is more than adequate for a comfortable, strong spray. 

Ashley C.

✔️ Verified Buyer

It’s compact enough to transport easily, built with durable materials. Stop suffering through cold showers or boiling endless pots of water invest in the. It's truly a 5-star piece of equipment that provides comfort and convenience wherever you need it.

Perkin M.

✔️ Verified Buyer

I recently bought a hot tub. I wanted an outdoor shower to rinse off before and after. I thought about a passive solar hot water delivery system. Not enough hot water. I thought about trenching and connecting my hot water supply from my basement. Too much work. Then I stumbled upon instant hot water heater world. I purchased this one.

Andy C.

✔️ Verified Buyer

It is totally great. Hot water is super scalding if you set the temp high. I don't recommend that. I built an outdoor shower and I run both hot and cold to the mixer.

Jennifer R.

✔️ Verified Buyer

I had the first one for approximately five years and used it daily, multiple times a day. Although it still works perfectly, I decided that it was finally time for a new one. Also, I appreciate the speedy shipping, thank you. The quality is excellent and would recommend products to anyone.
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