The Dimplex CDFI500-PRO-RGB Opti-Myst® Cassette is a premium built-in electric fireplace designed for projects where realism and design flexibility matter most. Instead of using a traditional flat flame effect, the Opti-Myst system creates a three-dimensional flame and smoke illusion using water vapour and LED lighting, giving it a more natural, lifelike appearance than many standard electric fireplaces.

Its compact 20" cassette design makes it ideal for custom feature walls, open-concept installations, media walls, and commercial-style fireplace designs. The RGB lighting adds a modern layer of customization, allowing the flame presentation to shift beyond the classic orange glow for a more dramatic or contemporary look. It can be installed as a standalone feature or combined with additional cassettes to create a longer, custom fireplace opening.

This model does not provide heat, which makes it best suited for ambience-focused spaces where visual impact is the priority. With tap-water operation, low-energy LED lighting, and no venting or gas line required, it offers a clean and flexible alternative to traditional fireplaces.

Overall, the CDFI500-PRO-RGB is a strong choice for homeowners, designers, and builders looking to create a high-end custom fireplace feature with one of the most realistic electric flame effects available. Its biggest strengths are its realism, flexible installation options, and premium visual presentation.