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Very helpful and knowledgable staff.
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Two heaters were ordered but one was found to be damaged when carton was opened. Replaced within 5 days and damaged item collected.
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Rointe Delta D Series DIW0550RAD White 550W Electric Radiator 5 Elements

Wifi Compatible - Rointe Delta D Series DIW0550RAD White 550W Electric Radiator 5 Elements
Heats Up To 5 m²*

* All recommended "heats up to" are for example only and are based on current building regulations any deviation within in this build example may significantly affect this recommendation. We always recommend contacting us for a free heat loss calculation.

Quick Find: 8762
Part Number: DIW0550RAD
RRP: £535.20
£289.90 exc VAT
Large order Bulk Discounts Available upon request
call us now on 01473 276686 to find out more!
Delivery Available: FREE Next Working Day
Order now for delivery by Thursday 24th August
if you place your order before 4:00 PM today!
RangeRointe Delta Ultimate, D Series
Model550 Watts, 5 Elements
BarcodeBarcode 8436045912466
WeightWeight 14.00 Kg

Rointe understands comfort and brings it to your home

As the experts in thermal heating, Rointe introduce the new range of next generation home domestic heating: Delta Ultimate.

Enjoy a mild and pleasant heat, flooding every room in your home. A healthy heat, which keeps the humidity relative without drying out the environment using the natural convection of the specially designed fins.

With Delta Ultimate you can enjoy the warmest winter in your home with all the advantages offered by a low energy system that you can control from anywhere at any time. Sounds great right?

The new Rointe Delta Ultimate heating system will revolutionise the way in which up to now we understand the world of heating.

With a sleek new design available in two colours and latest generation electronics with built-in WiFi, the Delta Ultimate has been designed to bring you the comfort your family needs along with the most versatile control.

Savings with maximum efficiency

Delta Ultimate is not only a home heating automation system which provides maximum comfort to your home,the Delta Ultimate goes much further.

The most advanced heating system ever created by Rointe incorporates Fuzzy Logic Energy Control, the new low power technology developed by Rointe. Fuzzy Logic Energy Control has evolved from its predecessor Optimizer Energy Plus – with a faster and more effective start-up period allowing the initial heating phase to be stabilized, thus reducing the equivalent ratio of consumption to 38%.

But what does that mean? We know concepts such as 'equivalent consumption coefficient' sound complicated, so we will make them easy to understand.

During tests performed in independent laboratories under specified parameters, a Rointe radiator with Optimizer Energy plus patented technology heating a 12m2 room to a set temperature of 21ºC for a period of 24 hours only uses power for less than half of the time, in fact only 40% of the time. So, it only uses 40% of the nominal power that it has available.

In other words, to keep the room at 21ºC for 24 hours the radiator only has to work for 40% of the time, which we define as equivalent consumption coefficient.

According to tests conducted by Rointe on the Delta Ultimate range incorporating the Fuzzy Logic Energy Control, the consumption is reduced by a further 6% from the Optimizer Energy Plus – taking the equivalent consumption coefficient to 38%.

The range of Delta Ultimate radiators have been designed down to the smallest detail. With an innovative curved design and slim-line aluminium side locks, the back lit touch control panel, the new advanced Fuzzy Logic Energy Control and E-Life Technology technologies - all make the Delta Ultimate radiator the flagship of the brand.

Low Consumption

Thanks to its Fuzzy Logic Energy Control technology, the average power consumed by the Delta Ultimate radiators accounts for only 38% of its rated power.

Irregular product with side locks

New curved design with slim line aluminium side locks on both sides to give the product a compact finish and a consistent look.

Optimised design for maximum dissipation

Maximum performance thanks to the new design of the bar, fins and the 98 mm depth of each element, with room for 50% more thermal fluid than other products on the market.

SMD electronics and advanced technology

Multi-layer surface mounted electronics with dual micro-controllers Rointe XLP8 & XLP16 Extreme Low Power, long lasting lithium battery and Triac as cutting element.

Optimal trade off between w/item

110 watts per element provide balanced heat transfer compared to other radiators on the market that consume between 125 and 160 watts per element, making them less efficient.

E-Life technology

The E-Life Technology allows the heating to be managed from the Internet in a simple manner and with individual control for each radiator.​

TFT screen

1.77″ TFT Screen, the next generation, high contrast screen offers optimal viewing from any angle.

The first radiator in the world with WiFi Inside

The first WiFi inside radiator in the world with WiFi module to control its functions from a smart phone or tablet without intermediate terminals or other external elements.

Advanced control by touch panel

Total control from the radiator itself using the built in back lit control panel.

Available in two colours

Product range finished in a sleek graphite and white for seamless integration into any environment.

Quality Assurance

Total security with a 10 year warranty on the aluminium, and 2 years for electrical components.

Technical Specifications
Brand Rointe
BTU 1876 BTU/hr
Child Lock Yes
Colour White
Depth 97 mm
Effective Power 209 W
Effective Power Ratio 38 %
Heats Up To 5 m²
Height 585 mm
No. of Elements 5
Portable No
Product Type Electric Radiator
Thermal Technology Oil Filled
Timer Programmable
Voltage 230/240 V
Warranty (Body) 20 Years
Warranty (Electrical Components) 3 Years
Wattage 550 W
Wi-Fi Compatible Yes
Width 510 mm
Products Price
Rointe Kyros ACMI120 Remote Control (White) Rointe Kyros ACMI120 Remote Control (White)
Quick Find: 8342, Part Number: ACMI120
£87.75 exc VAT
Rointe Kyros ACMIB120 Remote Control (Black) Rointe Kyros ACMIB120 Remote Control (Black)
Quick Find: 13183, Part Number: ACMIB120
£97.50 exc VAT

Feefo Reviews Click to view our independent Feefo review profile

Read our independently sourced Rointe Delta Ultimate, D Series reviews to see what our customers think about this product.

Customer Product Rating Customer Experience
Richard Lansdale
05 March 2017 12:37
Heater Shop Review
Product Rating Product Rating Product Rating Product Rating Product Rating
This heater is well-made and compact and fills a cold space very effectively. It is easily controlled by app which is a great advance.
I am really pleased that you are so happy with your new Rointe Delta Ultimate  digtial electric radiator and that you are using the fantastic app to control it with ease.
“Excellent service”
The ordering process was very easy and the heater arrived very promptly, in excellent packaging. The price was good and I would happily recommend the Heatershop to others.
Thank you for your fantastic review and your recommendation, we very much appreciate it.
Mark Dove
30 December 2016 15:07
Heater Shop Review
Product Rating Product Rating Product Rating Product Rating Product Rating
Excellent products at a good price
“Excellent service by Heater Shop”
Excellent service good value and rapid delivery
I will be back to buy more
Sounds great, we very much look forward to hearing from you in the future.
Trusted Customer
06 October 2016 22:07
Heater Shop Review
Product Rating Product Rating Product Rating Product Rating Product Rating
Easy to install. Works well!
“Very quick delivery. Well packaged.”
Very quick delivery. Well packaged.
Excellent, we really are very pleased that you received your order so efficiently.

Tracey Morgan
Customer Service Manager
Trusted Customer
02 October 2016 20:50
Heater Shop Review
Product Rating Product Rating Product Rating Product Rating Product Rating
Same as above.
“Great Service and Support throughout whole process of planning requirements and then the purchase and…”
Great Service and Support throughout whole process of planning requirements and then the purchase and delivery.
Thank you very much for your review, it is very much appreciated.

Tracey Morgan
Customer Service Manager
Trusted Customer
12 March 2016 20:58
Heater Shop Review
Product Rating Product Rating Product Rating Product Rating Product Rating
“Even though the first heaters arrived punctually. These were wrong the service in sorting this…”
Even though the first heaters arrived punctually. These were wrong the service in sorting this out was exemplary
Thank you very much for your positive comments, its really great to hear that our customers have been given a great service.
If you need any further assistance with the programming of your Rointe Delta Ultimate Electric Radiator, please do not hesitate to contact us on 01473 276686.

Hannah Boother
Customer Service Manager
Trusted Customer
15 November 2015 13:28
Heater Shop Review
Product Rating Product Rating Product Rating Product Rating Product Rating
“Great service and comunication with clients.”
Great service and comunication with clients.
Thank you very much!

Customer Service Manager


We take time and care to research relevant product information and report on current news for our product range that we believe you may find useful. Click on an article to read more.

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Frequently Asked Questions

We make every effort in answering your questions. Below is a list of those questions we are frequently asked. Click on a question to expand its answer.

Do Rointe electric radiators come with a remote?

The Rointe ‘K series’ and ‘Kyros series’ do not come with remotes but they can be purchased alongside the electric radiators from the accessories tab on the left hand bar. ...

Read more

What side is the flex/power lead on for Rointe wall mounted electric radiators?

The flex/power lead is on the right-hand side for the Rointe K Series, Rointe Kyros and the newer Rointe Delta Ultimate (D Series) ranges of electric wall mounted radiators.

Read more

Do Rointe radiators have child locks?

Rointe Kyros, K series and the Delta series electric radiators all have child locks on the settings panel to stop little hands from tinkering with your heating. Alongside manually using the contro...

Read more

Do the Rointe electric radiators need maintenance?

The radiator does not require any type of maintenance. We recommend that all parts of the radiator are kept clean (behind, underneath, upper fins etc.). Do not use any abrasive product on the alumi...

Read more

Do I need a remote control for the Rointe Kyros?

Purchasing a Rointe Kyros ACMI120 remote control simply makes sense. The Bi-directional wireless connection enables programming, that once sent to the product, can be received and copied into anoth...

Read more

Will the Rointe MIC110 work with the Kyros range?

The Rointe MIC110 remote control allows you to send and receive programmes between all of the K and T series heaters. These ranges are gradually being discontinued and replaced by the Kyros range. ...

Read more

Do Rointe electric radiators have a 24-hour timer clock?

Yes, our Rointe radiators are fully programmable 7 days a week/ 24 hours from the radiator control panel. The Rointe Kyros ACMI120 Bi-directional wireless remote can be purchased to control the ...

Read more

Why choose electric radiators?

Electric heaters do not burn fuel internally to generate heat, so there are no associated safety risks such as carbon monoxide poisoning or explosions. As there are no radiators to leak or burst...

Read more

Does the new Rointe Delta Ultimate have an app?

Yes, The new Rointe Delta Ultimate inside WiFi module is built into all of the new Delta Ultimate range, allowing control of all functions remotely with e-life technology through the Rointe Connect...

Read more

How high do the Rointe radiators need to be off the floor, when installed on to a wall?

The Rointe Delta Ultimate and the Rointe Kyros electric radiators work by means of natural air convection. In order to achieve optimal functioning and an even distribution of heat, the lower part o...

Read more

Whats the difference between Oil filled radiators, Gel filled radiators, and Dry heaters?

Quite simply - oil filled, gel filled and dry electric radiators are all electrically efficient, but may be more appropriate for your installation depending on your specific requirements and the si...

Read more

Where can I download Rointe heater instructions?

Rointe radiators are designed for household or residential use. We advise to have the radiator installed by an competent person or electrician where necessary making sure the radiator is properl...

Read more

What is an IP rating?

IP rating - Ingress Protection rating is the international standard used to define levels of sealing effectiveness of electrical enclosures against intrusion from foreign bodies including dirt and ...

Read more

Why is the Rointe conservatory electric heater the best heater for a conservatory?

The Rointe conservatory electric heater is the best heater for a conservatory as heating a conservatory in the winter can be an issue. Connecting a conservatory radiator to central heating is never...

Read more

How does the Rointe open window function work?

The Rointe open window function is invoked when the room temperature sensor detects a drop of 4ªC from the user-assigned temperature over a 30 minute period. Under these circumstances, the fun...

Read more

How do I unlock my Rointe radiator?

You can lock the control panel from the radiator, the Rointe Connect App or the AIR Control remote (optional). Here we show how to do it from the control panel of the product itself. By pressing...

Read more

Can I connect my Delta Ultimate products to the internet by sharing the 3G/4G connection of my mobile?

Yes but we don’t recommend this because the Delta Ultimate product will lose the connection when the mobile stops sharing or is out of range.

Read more

My Rointe Delta shows 3 bars of coverage but doesn’t respond to the app. What is happening?

There are always 3 bars. If there are gaps it is because there is no WiFi connection. If the aerial signal (situated on the left next to the coverage bars) doesn’t appear it means that the ...

Read more

I have connected various Delta Ultimate products but they don’t all work at the same time. If I switch the router off then back on they work randomly

The most probable cause is that the router can’t cope with so many WIFI products connected at the same time. Check the router and if it is limited to less products than are connected then you...

Read more

I am trying to install the application but it tells me that I don’t have enough space.

You will have to free up some space in your mobile by un-installing an application which you don’t use or cleaaring the caches in applications such as Google Maps or Facebook.

Read more

Can I pair my Delta Ultimate product in more than one zone or installation?

No, the Delta Ultimate product can only be controlled in the last zone where it was paired. If a Delta Ultimate product which is already included in an installation were to be paired in another, it...

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Sometimes the text “Checking Firmware Updates” appears on the screen of my Delta Ultimate product and it switches itself off and on. What does this mean?

This is a normal function and signifies that your Delta Ultimate product is checking for updates. If there are, it will restart to apply these updates.

Read more

I have created a zone but can’t access the advanced options

You can only change the advanced options when there are Delta Ultimate products associated to the zone.

Read more

Is there a limit to the number of zones in an installation or of Delta Ultimate products within a zone?

No, there aren’t limits for number of zones nor products within a zone.

Read more

I have activated the “Pairing” mode in my Delta Ultimate product by mistake. How do I get out of this mode?

Press and hold down the menu button (icon with 3 lines) for 3 seconds and the Delta Ultimate product will beep, then restart - keeping the original configuration.

Read more

I have paired my Delta Ultimate product in a zone and now I want to change it to another. What do I do?

You should unpair the Delta Ultimate product from this zone and pair it in the chosen zone.

Read more

A Delta Ultimate product is showing as an unknown product. What has happened?

When a Delta Ultimate product which was already paired in a zone is now paired in a new zone or installation it remains in the new one and appears as unknown in the original zone. You should unpair...

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Do my Delta Ultimate products lose their configuration if there is a power cut?

No, the Delta Ultimate product retains its configuration and will revert to how it was before the power cut.

Read more

“Firmware First Boot” and some numbers appear on the radiator screen. What does this mean?

This means that the Rointe Delta Ultimate product is updating itself. You do not need to do anything except wait until it has finished at which time it will restart itself and return to its previou...

Read more

Some of the screens of my Delta Ultimate products switch off and others don’t when I activate the programming. Why is this?

This is due to different brightness configurations. The Delta Ultimate products whose screens go off when the programming is activated have their brightness set at minimum which leaves the screen s...

Read more

If I manually configure the temperature of a zone and activate the programming the Delta Ultimate products change their temperature to that which is programmed but the application continues showing as if they had the manual temperature. Why is that?

This is a normal function. If you deactivate the programming by pressing the button, the Delta Ultimate products revert to manual operation with the options which appear on the screen. If you selec...

Read more

Can I have the screen of my Delta Ultimate product permanently switched off?

Yes, by changing the level of brightness to minimum. However when you touch a button on the Delta product - the screen will illuminate for a few seconds before switching itself off again.

Read more

A “P” appears on the screen of my Delta product and I can’t control it either manually or from the application?

The “Pilot Wire” option has been activated in the advanced options of your Delta product. To disconnect it, you should de-activate it from the advanced options screen of the final zone ...

Read more

What size fuse should be used in my appliances plug?

There is a formula for working out the fuse rating for each appliance. P (Power in Watts) / V (Voltage) = I (current in Amps) Note that you should always ensure that you round it up if it is ...

Read more

What is the room calculator and how do you use it?

To help you find the best heater for your room, we have created an easy-to-use Room Calculator. Before you begin, you will need 3 measurements: The width (in metres) of the room Leng...

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Do Rointe Electric Radiators include a set of brackets?

All Rointe Electric Radiators include a set of brackets to attach it securely to the wall, so there is no need to purchase this separately.

Read more

What is Fuzzy Logic?

Fuzzy logic is a mathematical technique for generating a spectrum of values between discrete binary values (0-1, TRUE-FALSE, ON-OFF). These numbers are said to be "fuzzy" in the sense the...

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Do the Rointe Kyros Remotes work with the Rointe Delta Electric Heaters?

Yes, however the Rointe Delta is also WiFi compatible - meaning you can with easily connect your smart phone or tablet to the Delta radiators and towel rails to program via the free Rointe Connect ...

Read more

Which size radiator do I choose?

We have made deciding which size radiator you need simple. Our electric heater room size calculator will provide you with an estimate of the minimum size and quantity of radiators, panel heaters...

Read more

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