WIFI CONNECTED HHR STORAGE HEATER
Energy-efficient technology
WiFi Direct
No gateway
Compatible with renewables
High heat
retention
Intelligence
Artificial
EXCEPTIONAL HEAT RETENTION
With this superior heat-storage performance, Onyx retains more of the heat it absorbs, wasting less energy and maintaining comfort for up to 16 hours after charging. Instead of overheating in the morning and cooling too quickly in the afternoon, the warmth is released steadily and predictably throughout the entire day.
Automate your heating system for greater comfort and savings
Looking for smart WiFi heating that really is? Unlike many systems that require expensive adapters purchased separately, the Rointe WiFi Direct system connects your radiators, towel rails, storage heaters, water heaters and thermostats directly to the router.
Forget about configuring gateways, smartboxes or extra modules.
Connect your devices with the Rointe Nexa app and start managing your heating system from anywhere. Adjust temperatures, program as you wish, control consumption, block devices and create automatic scenarios according to your location.
A storage heater full of smart technology
INVERTER SMART
ADAPTIVE TECH
Our most advanced low-consumption technology. Inverter Smart Adaptive minimises stabilisation power for far more efficient operation.
DIRECT WIFI
TECH
An integrated WiFi module, incorporated into your Rointe heating product for direct data transmission without the need to install additional gateways.
AI HEATING
SYSTEM
The Advanced Artificial Intelligence heating system uses AI learning to recommend ways to increase your comfort and optimize consumption.
POWER METER
TRUE REAL POWER
This integrated consumption meter collects and sends accurate information about the energy consumption of products to the Rointe Nexa App.
CONTROL
BY VOICE
You can now control your connected products using just your voice, with Amazon Alexa and Google Assistant compatibility through the Rointe Nexa app.
MINERAL CORE
TECH
Its internal cells are engineered with a special magnetite alloy designed to retain up to 6% more heat, ensuring a steady, comfortable heat release long after charging has finished.
ONYX HELP YOUR EPC RATING
Modern high-heat-retention storage heaters like Onyx improve EPC performance because they charge mainly during off-peak hours, using electricity with a lower carbon factor and primary energy demand.
Their efficient heat retention reduces the need for daytime top-ups, while smart controls (timers, thermostatic regulation, open-window detection and zoning) further support SAP calculations and meet Lot 20 requirements. Classified as smart storage heaters, they receive more favourable EPC assumptions than older direct-acting systems, helping many properties move from an E to a C or even B rating and supporting Future Homes Standard and Net Zero targets.
ONYX HELP YOUR EPC RATING
Modern high-heat-retention storage heaters like Onyx improve EPC performance because they charge mainly during off-peak hours, using electricity with a lower carbon factor and primary energy demand.
Their efficient heat retention reduces the need for daytime top-ups, while smart controls (timers, thermostatic regulation, open-window detection and zoning) further support SAP calculations and meet Lot 20 requirements. Classified as smart storage heaters, they receive more favourable EPC assumptions than older direct-acting systems, helping many properties move from an E to a C or even B rating and supporting Future Homes Standard and Net Zero targets.
TOP FEATURES
LIMITED MODE
Limited Mode narrows the selectable temperature range and restricts certain functions, allowing only controlled adjustments within preset limits. Perfect for homes with children, hotels, hostels and Airbnb properties.
SMART CHARGE
Smart Charging allows Onyx to charge intelligently rather than heating through the entire off-peak period. The heater calculates how much heat it will need for the next day and charges only what’s necessary, at the right time.
BOOST MODE
Boost Mode increases the temperature to a selected level for a defined period, providing rapid, focused heat when needed. Once the boost time ends, the heater automatically returns to its normal settings for efficient operation.
ADVANCE MODE
Advance Mode allows you to activate the next scheduled heating period instantly. If you arrive home earlier than planned, simply press the Advance button and the heater switches to the upcoming comfort temperature without waiting.
CONTROL 60%1 OF YOUR HOME’S ENERGY FROM A SINGLE APP
Discover the Rointe Global Electric Heating Solution with WiFi control through the Rointe NEXA app, the tool that transforms your heating into a 100% smart ecosystem. Control your radiators, towel rails, storage heaters, underfloor heating and hot water with Rointe products, inside and outside your home, all from the comfort of your smartphone.
Designed to be intuitive and easy to use, this application offers multiple advantages: individual or zoned control of your Rointe devices, management of multiple installations from a single platform, real-time notifications, and precise monitoring of your energy consumption and costs.
1 Source: Institute for Energy Diversification and Saving (IDAE).
Manage multiple facilities
Now you can have, in the same app, control of your main house by floor or room, and of the heating systems in your secondary residence or office.
Pair your products easily
Using the new quick and guided Bluetooth Link process, you can enjoy full control of your heating in just 3 steps.
Your personal data is fully protected
All personal data is transmitted securely using encryption algorithms that guarantee integrity, confidentiality and anonymity.
Automate your heating using your GPS
Control your heating with manual or automatic scenarios by geolocation. Your products will turn themselves on or off when you leave or return home, optimizing comfort and consumption.
Know the real cost of your heating
We know how important it is for your energy consumption to be efficient. Thanks to the True Real Power consumption meter, you will be able to see the cost of your heating and set spending limits.
Modify your installed power
With the Rointe Nexa app you can reduce up to 30% the total installed power of your radiators, optimizing the consumption of your home. Improve efficiency, control your spending and save energy.
Check your stats
Discover in the Statistics section of the Rointe Nexa app, with graphs of current, daily and historical data of parameters such as room and setpoint temperature, energy consumption or cost.
Night mode: save while you sleep
Save while you sleep with Night Mode, which reduces the temperature by up to 1.5°C in 3 hours, turns off the display and mutes the product to give you rest and efficiency.
Vacation Mode
With Rointe Nexa's Vacation Mode you can program the shutdown of your radiators during your absence, reducing consumption. At the end, the system is automatically reactivated to ensure comfort upon your return.
Limited Mode
The Limited Mode is ideal for tourist accommodations. It allows setting a temperature range (such as 19-22 ºC) and locking the menu, avoiding energy waste without losing the guest's comfort.
AI-powered heating: your comfort taken to the next level
An intelligent system ready to learn even more about you
All data obtained by our products is transmitted securely using encryption algorithms that ensure integrity, confidentiality and anonymity. This information is essential for our AIH intelligent layer to deliver all the technological advantages that artificial intelligence can offer.
Once your products are installed, the AIH System will evolve with you and your installation, learning from your usage habits to provide increasingly accurate recommendations and configurations through machine learning.
Intelligent diagnosis
The intelligent diagnostic function uses artificial intelligence (AI) to monitor and optimise your heating performance, improving energy efficiency in real time.
View your comfort level
Thanks to the AI integrated into your system, you can monitor your comfort level at any time from the app, with real-time data that helps you maintain a comfortable and efficient temperature.
Personalised recommendations
The AI-powered heating system analyses your habits and environment to offer personalised recommendations that enhance comfort and optimise energy consumption.
WHERE ONYX WORKS BEST
Residential Refurbishment & Home Upgrades
In renovation and home improvement projects, high heat-retention storage heaters such as Rointe’s ONYX deliver an immediate upgrade in efficiency, comfort and control. They are ideal for replacing older systems without complex building work, making use of cheaper night-time tariffs to charge and providing stable warmth throughout the day. With Smart Charging, ONYX adjusts the required energy based on the home’s actual usage, avoiding overcharging and reducing running costs. In addition, WiFi Direct allows the heating to be managed from a smartphone, bringing convenience and modernisation to any refurbished home.
Social Housing & Housing Associations
High heat-retention storage heaters, such as Rointe’s ONYX, offer an ideal solution for social housing in the UK. They take advantage of cheaper night-time electricity, store heat efficiently and release it steadily throughout the day, reducing costs and improving comfort. Their 60% heat retention and Smart Charging system optimise energy use and help improve EPC ratings. In addition, their WiFi Direct connectivity enables remote control and minimises maintenance, providing long-term reliability and efficiency for both housing providers and residents.
Educational Buildings
In educational centres, high heat-retention storage heaters such as Rointe’s ONYX provide precise thermal control tailored to fixed schedules. Their ability to deliver steady, consistent heat during teaching hours ensures comfortable classrooms without temperature fluctuations, even in the coldest months. Smart Charging automatically adjusts the charge according to expected usage, avoiding unnecessary consumption at weekends or during non-teaching periods. In addition, WiFi Direct connectivity enables centralised management, ideal for maintenance teams who need to supervise multiple spaces from a single point.
Holiday Lets & Short-Term Rentals
In holiday homes and short-term rentals, high heat-retention storage heaters like Rointe’s ONYX offer a key advantage: stable comfort without constant switching on and off. Their ability to charge overnight and retain heat for up to 16 hours prevents unexpected consumption between guest stays and reduces the energy spikes typically caused when guests arrive and turn the heating up to maximum. Thanks to Smart Charging and WiFi Direct connectivity, property owners can control the system remotely, adjust schedules according to bookings and ensure a pleasant environment from the very first minute — all with far greater energy efficiency.
Product features:
Onxy storage heater
-
Single & Dual feed system
-
24/7 fully programable heating
-
24/7 fully programable charging
-
Anti-Frost, Eco and Comfort modes
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Additional Boost Mode
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Exclusive Limited Mode for guests: special for hotels and Airbnb's
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Smart charge function to increase energy saving
-
Advance Mode: instantly jump to the next programmed period
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Inverter Smart Adaptive technology
-
WiFi Direct & Artificial Intelligence
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Bluetooth Module for direct pairing
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Fully controllable with the new Rointe NEXA App
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High-quality fan with ceramic rotor
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Touch control panel with 1.77" full-color display
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TRP consumption meter
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Countdown function up to 24 hours
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4 editable preset programs
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Open Window Function
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Energy saving modes: Do not disturb, Night & Holidays
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Electronic overheating protection
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Two floor support sets included: 60 mm and 140 mm
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Compatible with voice assistants
Product Video:
ONYX WiFi Storage Heater
Technical data
| ONYX | |
|---|---|
|
Heating technology |
Magnetite energy cells |
|
Installation position |
Floor mounted. Wall fixed. |
|
Voltage (V) |
220 – 240 V~ |
|
Rated input power +5%/-10% (W) |
1020 W, 1560 W, 2220 W, 2760 W, 3300 W |
|
Output rated power (W) |
500 W, 700 W, 1000 W, 1250 W, 1500 W |
|
Boost Mode (W) |
340 W, 520 W, 740 W, 920 W, 1100 W |
|
Max. storage capacity (kWh) |
7.14 kWh, 10.92 kWh, 15.54 kWh, 19.32 kWh, 23.10 kWh |
|
Nominal charging period (h) |
7 hours |
|
Heats up to (m2) |
5 m2, 7 m2, 10 m2, 12 m2, 15 m2 |
|
Height with 60 mm feet (mm) |
660 mm |
|
Height with 140 mm feet (mm) |
740 mm |
|
Width (mm) |
580 mm, 703 mm, 865 mm, 1,069 mm, 1,069 mm |
|
Depth (mm) |
190 mm |
|
Empty weight (kg) |
26.67 kg, 31.75 kg, 36.35 kg, 43.9 kg, 46.75 kg |
|
Weight with cells (kg) |
59.3 kg, 80.7 kg, 102.5 kg, 126.3 kg, 147.2 kg |
|
Cable Length (m) |
1.4 m |
|
Plug |
not included |
|
IP rating |
IP24 |
|
Isolation |
Class I |
|
Certifications |
UKCA, CE, RoHS, EcoDesign Lot20, SAP |
Resources
Customer reviews
Why choose Rointe?
electric heating for a greener future
Rointe electric heating systems are designed to help you reduce your carbon footprint by using electricity: the only energy source that can be generated from 100% clean, renewable resources.
Our products are fully compatible with renewable energy systems such as solar panels (photovoltaic), wind turbines, and more, making them a smart choice for sustainable living.
Rointe also develops actions focused on sustainability to protect our planet:
100% RECYCLABLE PACKAGING
Our eco-friendly packaging is 100% recyclable, helping reduce carbon emissions and minimize landfill waste.
REFORESTATION CAMPAIGNS
Every time you purchase and register a Rointe heating product, we plant trees through reforestation initiatives.
POWERED BY GREEN ENERGY
We manufacture Rointe products with renewable energy thanks to our own solar panels, ensuring a totally sustainable production.