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Easily turn fireplace design concepts into reality with the Opti-myst Pro 1000 Built-in Electric Firebox. Install as a single-sided unit, or remove the included backer panel and convert to a see-through design that opens the view between rooms. The discrete heater completes the functionality and ensures perfect comfort in addition to the dazzling Opti-myst flame and smoke effect.

Opti-myst Brochure


  • Opti-myst technology - life-like, 3-dimensional flame effect, creates an illusion of fire and smoke. The world's most authentic electric fireplace experience.
  • Customizable Flame Width - Includes spacers and slots for customizable flame width and pattern.
  • Single or Double-sided - Includes removable hi-gloss/reflective backer panel for easy conversion.
  • Supplemental Heat - Includes an effective fan-forced heater to warm up to 400 sq. ft.; Heater heats one side, even with backer panel removed.
  • Adjustable Flame Intensity - Control the desired volume of flame.
  • Continuous Water Supply - Optional plumbed water supply kit (CDFIPLUMB-KIT) provides continuous operation without refilling water tanks.
  • Media Options - Includes media tray that can be customized with any media (not included). Optional inner glow logs also available.
  • Sight and Sound Remote - Control the flames, heater, and sound at the touch of a button.
  • Safe - With no flame heat and a glass front that stays cool to the touch
  • Sounds - The crackle of a real wood fire, adjustable with the remote control
  • Zero Emissions - The most sustainable fireplace option; no emissions and 100% efficient.
Dimplex Opti-Myst Pro 1000 Built In Electric Firebox | GBF1000-PRO | Technical Details


Product Details

Fuel Type: Electric
Vent Type: Vent Free
Installation Type: Built In
Style: Linear
Weight: 35 lbs.
BTU's @ 120V: 4,981 BTU's
Amps: 12.17 Amps
Watts: Max 1460W
No Heat Setting: No
Dimplex Opti-Myst Pro 1000 Built In Electric Firebox | GBF1000-PRO | Dimensions


Actual Dimensions

Height Width Depth
313/4" 465/8" 161/4"

Framing Dimensions

Height Width Depth
323/8" 451/4" 143/4"

Technical Drawings

For more detail please see the Installation Manual

GBF1000 Technical Drawing 1
GBF1000 Technical Drawing 2


How will this fireplace be shipped to my house?

The Opti-myst Pro 1000 is generally shipped via freight carrier. The fireplace will be securely packaged and inspected before leaving the warehouse. For more information, see our FAQ page.

Is this single sided or double sided (see through)?

This firebox is shipped as a single sided fireplace, but the back panel can be removed to create a double sided, see through fireplace.

Have another question? Email us,, call us (844)635-5499 or use the question and answer system below!

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Warning CA residents-Prop 65