The Dimplex Opti-Myst fireplace is one of the most realistic-looking electric fireplaces on the market — but is it the right fit for your home? Using innovative water vapour technology, it creates a stunning flame and smoke effect without any real fire, fumes, or installation hassle. Before you buy, it's worth knowing both the strengths and the limitations.
In this guide, we break down the pros and cons of Opti-Myst fireplaces to help you make a confident, informed decision.
In this video we explain what a water vapour fireplace is and how it works.
Dimplex Opti-Myst: Pros and Cons
Why an Opti-Myst Fireplace Might Be Right for You
- Realistic and safe: The Opti-Myst technology creates a stunningly realistic flame effect using water vapour and LED lighting. It is completely safe to touch, making it ideal for homes with children or pets.
- Eco-friendly and healthy: Since it does not emit smoke, fumes, or odours, it is the healthiest choice for indoor use and better for the environment than traditional fireplaces.
- Vent-free installation: No ventilation or chimney is required, allowing for versatile placement throughout your home.
- Modern design options: Available as wall-mounted, freestanding, 1–3 sided built-in inserts, and 360-degree open fireplaces, offering contemporary styling to match any décor.
- Low maintenance: Only periodic refilling of the water tank and basic cleaning of components is required.
When Opti-Myst Might Not Be the Right Choice
- Condensation in small spaces: In very small rooms, the added humidity from the vapour may cause minor condensation. Ensure proper ventilation in such areas.
- Water source requirements: Opti-Myst fireplaces require clean water. If access to filtered water is limited, this may be an inconvenience.
- Limited heating capability: Most models do not provide any heating effect. A select few models include a built-in electric heater, but these are primarily decorative rather than a primary heat source.
- Installation constraints: For those wanting a fixed water installation, additional plumbing may be required, which can increase setup costs.
Additional Considerations: Humidity and Safety
Humidity
Opti-Myst fireplaces do increase the humidity in a room. However, even a larger unit such as the Opti-Myst Cassette 500 produces moisture equivalent to that of one person breathing. This minimal increase is safe and unlikely to cause issues in most spaces.
Safe and Hygienic Operation
Dimplex has designed these units to prevent bacterial growth by treating all water-contact components. As a result, the vapour produced is entirely free of harmful bacteria, offering a healthier alternative to other heating options.
Addressing Common Issues
Low flame height: Older models sometimes had issues with low flame height. The newer Dimplex Opti-Myst Pro models have resolved this with adjustable flame height settings and improved features for greater customisation.
Durability: Opti-Myst fireplaces come with a 2-year factory warranty, offering peace of mind and ensuring performance is maintained over time.
If you experience any issues with your Opti-Myst fire, read our guide: Troubleshooting Common Dimplex Opti-Myst Problems.
More Pros and Cons to Consider
Additional Pros
- Energy efficiency: Opti-Myst fireplaces use very little electricity and water, making them cost-effective to operate.
- Silent operation: The quiet functioning of the fireplace ensures it does not disrupt the ambiance.
- Portability: Many models are easy to move, allowing for flexible placement around your home.
Additional Cons
- Higher upfront costs: The innovative technology and premium design come at a higher initial cost compared to other electric fire options.
- Not suitable for outdoor use: Unlike some traditional wood-burning stoves or bioethanol fireplaces, Opti-Myst models are strictly for indoor use.
By weighing these pros and cons, you can determine whether a Dimplex Opti-Myst fireplace aligns with your needs and preferences. With their unique features, modern aesthetics, and eco-friendly design, they are an excellent option for many — though not without a few considerations.
