The Outdoor Greatroom Fire Media Line is a collection of certified, commercial-grade burner covers engineered explicitly for their Crystal Fire® Plus series. Unlike standard decorative stones or basic glass pieces, these materials undergo rigorous testing to handle thermal stress up to $1,200^\circ\text{F}$. They fulfill two critical functional roles: they act as a heat-dispersal matrix that creates a fuller, more efficient flame pattern, and they protect the delicate burner ports from wind, debris, and water logging.
The Variations & Profiles
1. CFG-D (Clear Tempered Fire Glass Gems)
The universal baseline for modern fire pits. These feature a smooth, rounded droplet shape that creates a striking "ice on fire" visual profile.
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The Dynamic: Because the glass is completely clear, it magnifies and refracts the ambient light of the gas fire. The flames appear to dance across and through the gems, providing maximum illumination and a highly active surface glitter.
2. CFG-O (Black Onyx Tempered Fire Glass Gems)
The contemporary minimalist choice. Identical in shape and thermal composition to the clear gems, but infused with a dark, rich onyx tone.
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The Dynamic: The mirror-like black surface creates a deep contrast against orange gas flames. At night, it reflects the fire like dark water, while during the day, it completely camouflages the underlying stainless steel burner tubes for a cleaner look.
3. CFLD-C (Large Copper Tempered Fire Glass Diamonds)
The premium textural alternative. Instead of rounded beads, the Diamond series utilizes a hand-cut geometric rhombus shape.
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The Dynamic: The sharp facets catch and bend light from multiple angles simultaneously. Combined with a deep copper/amber coloration, this media radiates a warm, pulsing "glowing coal" aura that closely mimics the behavior of a real hardwood ember bed.
4. LAVA-BLK (Black Lava Rock)
The organic, traditional landscape staple. Raw, highly porous volcanic rock harvested directly from ancient lava flows.
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The Dynamic: The coarse, uneven pockets trap escaping gas, blending it with oxygen right at the surface. This creates an erratic, swirling, campfire-style flame pattern with exceptional heat retention that continues to radiate warmth long after the valve is turned off.
5. LAV-TMB (Tumbled Lava Rock)
The coastal-modern hybrid. Natural volcanic stones that have been mechanically tumbled to strip away sharp points, leaving behind smooth, rounded "river-stone" geometries.
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The Dynamic: A clean, zen-like aesthetic finished in a soft, white-washed grey palette. It provides the erratic convection properties of natural rock but with a soft, uniform structure suited for high-end landscape architecture.
Specifications Matrix
| Feature Code | Media Classification | Geometric Shape | Primary Color Profile | Standard Packaging | Material Sizing |
| CFG-D | Tempered Glass Gems | Smooth/Rounded Drop | Crystal Clear | 5 lb. Bag | Approx. $1/2\text{ Inch}$ |
| CFG-O | Tempered Glass Gems | Smooth/Rounded Drop | Opaque Black Onyx | 5 lb. Bag | Approx. $1/2\text{ Inch}$ |
| CFLD-C | Tempered Diamonds | Faceted Rhombus | Metallic Copper / Amber | 5 lb. Bag | $3/4\text{ Inch to } 1\text{ Inch}$ |
| LAVA-BLK | Volcanic Rock | Coarse / Porous | Matte Charcoal Black | 20 lb. Bag | $1\text{ Inch to } 2\text{ Inches}$ |
| LAV-TMB | Tumbled Volcanic Rock | Smooth / Rounded | Grey & White-Washed | 6 lb. Bag | $3/4\text{ Inch to } 1\frac{1}{2}\text{ Inches}$ |
Burner Capacity Estimation Guide
To ensure an even 1-inch layer covering the burner tube without choking the system, Outdoor Greatroom designates the following layout requirements:
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CFP1224-K (12" x 24" Linear Burner): Requires 10 lbs of glass media (2 bags of CFG/CFLD) or 1 bag of LAVA-BLK.
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CFP1242-K (12" x 42" Linear Burner): Requires 15 lbs of glass media (3 bags of CFG/CFLD).
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CFP20-K (20" Round Burner): Requires 10 lbs of glass media (2 bags of CFG/CFLD).
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CFP30-K (30" Round Burner): Requires 25 lbs of glass media (5 bags of CFG/CFLD).
Crucial Installation & Maintenance Information
The Curing Requirement (LAV-TMB Special Note): When you first open a bag of Tumbled Lava Rock, it will appear dark grey or muddy. This is normal and caused by trapped microscopic quarry moisture and dust. Once spread onto the burner, run the fire pit on low for 30–45 minutes. As the moisture vents, the rocks will permanently lighten into their intended soft grey/white-washed finish.
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Moisture Evacuation & Popping: If your fire pit is exposed to rainfall, lava rock (both BLK and TMB) will absorb water into its pores. Heating wet rock too quickly causes internal water to rapidly expand into steam, which can cause the stones to crack loudly or pop out of the tray. Always run a damp fire pit on low for a short duration to dry the media safely.
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The "One-Inch" Depth Guardrail: Never overfill your burner tray. Glass and stone should cover the burner tubes by exactly one inch. Piling media too deep traps unburned gas beneath the surface, resulting in delayed ignition ("mini-explosions") or excessive black soot accumulation.
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Cleaning Routine: Over time, outdoor dirt, leaves, and pollen will settle into the media. To clean glass gems or diamonds, scoop them into a mesh colander, rinse thoroughly with clear water and mild dish soap, and allow them to dry completely on a towel before replacing them.