Celsi Ultiflame Ultra FX Acero Electric Fire – Panoramic Proportions for Standard Back Panel Openings
Designed to be the contemporary centrepiece for modern fireplace surrounds, the Celsi Ultiflame Ultra FX Acero Electric Fire boasts cutting-edge flame technology with a sleek, contemporary aesthetic. With an expansive 17 inch panoramic flame display set within a bold 26 inch fascia, this electric fire is designed to make a striking visual impact while offering warmth and advanced control options.
Despite its considerably wider-than-average flame viewing area and fascia, the Acero Ultra FX is cleverly designed to fit within a standard 16” x 22” fireplace back panel cut-out, allowing for easy integration into a variety of fireplace surrounds. Whether you're looking to enhance a traditional mantel or create a modern feature fireplace, this fire provides an unrivalled balance of style and functionality.
A Lifelike Flame Experience Like No Other
At the heart of the Celsi Ultiflame Ultra FX Acero is its state-of-the-art Flame Projection® Technology, a feature designed to replicate the natural movement and depth of a real fire. Unlike standard electric fires, this model projects flickering flames onto the back of the firebox, creating a multi-layered, ultra-realistic flame effect.
The fuel bed consists of genuine, hand-scorched oak logs resting on a glowing bed of ash embers, providing an authentic, mesmerising focal point for any room. With 16 pre-set flame colours, an animation mode, and the ability to adjust flame speed and brightness, the Acero Ultra FX allows you to create a personalised ambience at any time of day or year.
Customisable Heating for Ultimate Comfort
This fire isn’t just about stunning visuals - it’s also built to deliver efficient, responsive warmth. Featuring a thermostatic 1.5kW fan heater, the Acero Ultra FX provides instant heat when needed, making it an ideal supplementary heating source for those colder evenings. The built-in thermostatic control maintains your preferred temperature automatically, ensuring optimal comfort with minimal energy consumption.
For year-round enjoyment, the flame-only mode allows you to enjoy the beauty of the fire without any heat, creating a cosy, welcoming atmosphere even in the warmer months.
Smart Control & Voice Activation
With the Celsi Ultiflame Ultra FX Acero, adjusting your fire’s settings has never been easier. The included thermostatic remote control puts you in full command of flame settings, brightness, heat output, and fuel bed colours, all from the comfort of your sofa.
For added convenience, this fire is compatible with the Celsi Smart App, allowing you to control it via your smartphone or tablet. Whether you want to adjust the flame colour, set a timer, or turn on the heat remotely, the app provides complete flexibility.
For those who prefer voice-activated convenience, the Acero Ultra FX is also fully compatible with Amazon Alexa and Google Assistant, meaning you can control your fire hands-free with simple voice commands.
Designed for Straightforward Installation
The Acero Ultra FX is designed to be recessed into a standard fireplace opening, with a 75mm inset depth, ensuring a sleek, built-in appearance. A 40mm fixed spacer is included, allowing for easy access to manual controls while maintaining a clean and polished finish.
Whether installed in a traditional surround or incorporated into a modern media wall, the Acero Ultra FX is designed to enhance any interior with its striking design and innovative features.
Key Features:
✔ Expansive 17-inch flame display – A wider-than-average viewing area for enhanced realism
✔ Sleek 26-inch Chrome & Black Nickel fascia – A contemporary finish for a modern touch
✔ Flame Projection® Technology – Creates deep, flickering flames for an authentic fire experience
✔ Handcrafted real oak log fuel bed with glowing embers – Adds warmth and realism
✔ 16 flame colour options with animation mode – Customise the fire’s look to suit your mood
✔ Adjustable flame speed & brightness – Tailor the intensity of the flames
✔ 1.5kW thermostatic heating – Efficient warmth with automatic temperature control
✔ Flame-only mode – Enjoy the stunning visuals without heat for year-round ambience
✔ Multiple control options – Includes a remote, smartphone app, and manual controls
✔ Amazon Alexa & Google Assistant compatible – Control your fire with voice commands
✔ Slim 75mm inset depth with a 40mm fixed spacer – Designed for easy installation into a standard fireplace opening
🔥 The perfect blend of style, innovation, and functionality – Order the Celsi Ultiflame Ultra FX Acero today! 🔥

Download Instructions
(Manufacturers instructions are offered as a guide only and may not always be the latest version)
Key features of the Celsi Ultra FX Acero Electric Fire can be found below.
Heater Type | Fan |
Choice of heat settings | 0.75kW / 1.5kW |
Safety | Thermal cut out |
Fitted Plug | Yes |
Flame Effect Independent of Heat | Yes |
Flame/Fuel Effect | LED / Natural Oak Logs & Ash Embers |
Colour/Finish | Chrome & Black Nickel or Chrome & Satin Silver |
Style | Inset |
Control | Fully Automatic Remote with Thermostat plus Manual Override CELSI App controllable (iOS & Android) Amazon Alexa and Google Assistant compatible |
Minimum Floor Clearance | N/A |
Required Builders Opening | 565mm (H) x 420mm (W) x 80mm (D) |
Warranty | 3 Years |
The dimensions (width, height, depth) of the Celsi Ultra FX Acero Electric Fire are listed here.

Please note: Due to rising freight charges, we are now being forced to charge extra for delivery to certain Scottish postcodes.
Standard electric fires such as the Celsi Ultra FX Acero Electric Fire will be delivered using a Premier courier service. We will contact you to book-in a suitable delivery date as soon as we're ready to dispatch your item(s). The courier service we use has a service where they will send you a text message on the morning of the delivery to advise on a 1 hour time slot when your item(s) will arrive.
Current delivery times for the Ultra FX Acero is approximately 3-5 days however, this is dependant on stock levels at time of placing an order. Once an order is placed, we will contact you to advise if there is likely to be any delays on the estimated delivery time.
Returns information
We understand that from time to time some of our customers may change their mind or simply not be pleased with their chosen products once delivered and/or installed. Our returns policy should hopefully help with the process of returning your order in this instance. Please feel free to contact us should you have any further queries.