Match the complete ordering code
Accessory fit follows the documented model and generation. A similar product name or nominal width does not establish interchangeability.

Dimplex
From $397.99
Dimplex ·
The separate FG1000 front glass for its documented legacy 40-inch Optimyst Pro Box application.
In Stock

FG1000 completes the front-glass selection for the documented legacy Optimyst Pro Box arrangement. Select it by its exact accessory code rather than a general 40-inch description.
Dimplex lists the accessory at 40⅝ inches wide, 14½ inches high and 1⅝ inches deep. These are the accessory dimensions; they do not describe the fireplace framing opening.
The front glass is separate from a rear-glass pane and from the cassette system. Keep the enclosure, cassette and glass selections distinct when reviewing the complete installation.

Legacy CDFI-BX1000 / GBF1000 front-glass arrangement
| Ordering code | FG1000 |
|---|---|
| Glass width | 40⅝ in |
| Glass height | 14½ in |
| Glass depth | 1⅝ in |
| Application | Legacy front-glass arrangement |
Accessory fit follows the documented model and generation. A similar product name or nominal width does not establish interchangeability.
| In the box | Contents & quantities |
|---|---|
| Selected accessory | One FG1000 front-glass assembly |
| Firebox and flame system | Sold separately |
No. FG1000 is the front-glass accessory. GBF1000-GLASS is a different ordering code for a rear-glass application; similar model numbers do not make the two panes interchangeable.
The manufacturer catalog lists FG1000 at 40⅝ inches wide, 14½ inches high and 1⅝ inches deep. These measurements describe the accessory, not a rough opening.
No. Follow the exact firebox installation guide for the framed opening, clearances and support. The glass dimensions alone do not establish those construction requirements.
The exact enclosure listing identifies FG1000 as separate. Review the package you are ordering so the front glass is accounted for without assuming it comes with a firebox-only enclosure.
No. This listing is the front-glass accessory. The enclosure and the required flame-system components are separate parts of the complete installation.
The accepted evidence establishes the legacy FG1000 application. It does not establish interchangeability with current RGB Pro Box glass. Match the exact installation guide and ordering code.
No. Shipping dimensions include protective packaging. Use the accessory measurements shown here for the glass and the compatible firebox guide for installation.
A similar width does not establish the mounting arrangement or suitability for the appliance. Use the exact accessory specified for the complete firebox model.
No. Keep the ventilation and access arrangements required by the firebox and cassette instructions. An accessory pane does not redefine the complete installation requirements.
Record the complete firebox model and the original glass code. Confirm that the required part is the front assembly, rather than the rear pane or another trim component.
CONFIDENCE BEYOND THE FIRST FIRE
Keep the exact accessory code, appliance model and purchase record together for replacement-part and fit support. This separate accessory does not automatically inherit the fireplace’s warranty period.
A real person. Useful advice.
We can help match the accessory code to your complete Dimplex model and installation.

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The Dimplex story
Dimplex’s electric-flame story includes the original Optiflame® effect, introduced in 1988. Its continued development of electric fire experiences includes Optimyst® water-vapor technology, which combines cold water vapor and light to create a moving flame illusion.
Part of the Glen Dimplex Group, the brand offers electric fireplace designs for residential, commercial and hospitality spaces. At Hearth Outpost, explore the different forms, flame technologies and installation approaches to find the one that belongs in your project.
Visit the Dimplex Shop by Hearth Outpost