Onyx Eclipse Electric Fires
The Onyx Eclipse is an inset electric fire in four formats, each with an integrated three or four-sided gloss black frame. Authentic LCD Flame Technology renders sixteen flame choices over Split Oak logs that glow from within, with full app, remote and touch control.
About Onyx Eclipse Electric Fires
Chosen by Marlow Stoves
Every Eclipse shares the same heart: Authentic LCD Flame Technology rendering sixteen flame choices from real flame imagery, across five brightness levels. Over the crystalline ember bed, Chromalight Plus lighting glows in eight colours or an ever-changing spectrum mode, while Split Oak logs with IlluminOak technology are illuminated from within - a soft, gently pulsing glow that downlighting in Amber or White picks out from above. Nine MyFlame presets bring flame and lighting together at a touch, three of them customisable and savable from the app, and an optional Mood Lighting kit extends the glow around shelving or a TV in thirteen colours.
A programmable thermostatic heater holds your set temperature in the most efficient way possible - up to 2kW, or 1.5kW on the 40R - with Adaptive Start Control and Open Window Detection, while flame-only and fan-only modes keep the fire in use all year. The compact 40R drops into a standard 16-inch fireplace opening, the tall 65HLR suits wooden mantels, and the 65R and 75R inset into chimney openings or bespoke media walls. Ecodesign compliant with zero direct emissions, and showroom exclusive through Onyx expert retailers across the UK and Republic of Ireland.
Onyx Eclipse Frequently Asked Questions
What sizes does the Onyx Eclipse come in, and which should I choose?
The Eclipse comes in four formats: the compact 40R, made for a standard 16-inch fireplace opening; the tall, square 65HLR with an expansive viewing window; the landscape 65R; and the statement 75R - the largest in the range. The choice turns on the wall: existing fireplace opening, chimney breast, media wall or mantel.
What is the difference between the Eclipse models?
All four models share the same flame technology, glowing logs and controls - the differences are shape and scale. The 40R is compact and rectangular for standard fireplace openings, and alone runs a 1.5kW heater and the exclusive Vermiculite flame setting. The 65HLR is tall and square, suited to wooden mantels. The 65R is landscape; the 75R is the largest, for spacious interiors.
What are IlluminOak glowing logs?
IlluminOak is Onyx's internally lit log-effect: hand-finished Split Oak logs illuminated from within, so the glow pulses gently through the timber as it would in a real fire. Log lighting adjusts across eight colours or an ever-changing spectrum mode, with the ember bed below glowing in matching Chromalight Plus colours.
Can the Onyx Eclipse be fitted into an existing fireplace?
Yes. The 40R is proportioned for a standard 16-inch fireplace opening, while the 65R, 65HLR and 75R feature a tapered firebox that slots into an existing chimney opening or a prepared chamber in a media wall. The integrated gloss black frame conceals any imperfections around the opening, used four-sided or three-sided with the bottom trim removed.
Is the Onyx Eclipse expensive to run?
The Eclipse draws a maximum of 2kW on its heater - 1.5kW on the 40R - and its thermostatic control holds your set temperature as efficiently as possible, with Adaptive Start Control and Open Window Detection keeping consumption in check. Flame-only mode runs the visuals without heat, and every model is Ecodesign compliant with zero direct emissions.
Where can I see the Onyx Eclipse before buying?
The Eclipse range is showroom exclusive, sold through Onyx expert retailers across the UK and Republic of Ireland. You can see the range at our Marlow showroom in Buckinghamshire - call 01628 290142 to arrange a visit and compare the four formats in person.
What warranty does the Onyx Eclipse carry?
Every Eclipse carries Onyx's five-year extended warranty once registered under the Onyx Promise, extending the standard two-year cover, with a consumables guarantee for the first year. Registration is free via the Onyx website.
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