Dimplex ATH20 Atherton Optimyst Inset Electric Fire

The Dimplex ATH20 Atherton Optimyst Inset Electric Fire is a premium inset electric fire designed to fit neatly into a standard fireplace opening, delivering a classic built-in look with the convenience of electric. Its standout feature is Dimplex Optimyst technology, which uses ultra-fine water mist and lighting to create a remarkably realistic 3D flame and smoke effect—giving you the atmosphere of a real fire without smoke, soot, or ash. It’s an ideal centrepiece for living rooms and traditional fireplace surrounds where you want authentic-looking flames with minimal maintenance and no need for solid fuel.

As well as ambience, the Atherton provides instant, controllable heat at the touch of a button, allowing you to quickly take the chill off the room and adjust warmth to suit the season. The Optimyst effect can typically be enjoyed with or without heat, so you can run it purely for mood all year round and add warmth only when required. With no fuel storage, no sweeping, and typically no chimney or gas connection needed, the ATH20 Atherton Optimyst is a clean, practical upgrade that combines impressive flame realism with everyday electric comfort.