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Real Fyre Contemporary 18-Inch Vent-Free Gas Fire Glass Set Insert

Real Fyre Contemporary 18-Inch Vent-Free Gas Fire Glass Set Insert

SKU G21-GL-18-12
$2,147.60
$1,652.00
Fuel Type

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Real Fyre Contemporary 18-Inch Vent-Free Gas Fire Glass Set Insert

  • Contemporary Fire Glass Design: Brilliant tempered fire glass replaces traditional logs to create a shimmering, modern ember bed where lively flames dance and reflect light, transforming any fireplace into a sleek centerpiece.
  • Efficient Vent-Free Heating: With up to 20,000 BTUs and approximately 99% heat retention, this vent-free insert delivers powerful zone heating without losing warmth up a chimney.
  • No Chimney Required: The vent-free design eliminates the need for venting or a chimney, making installation more flexible for homes that meet vent-free requirements.
  • Built-In Safety Sensor: An Oxygen Depletion Sensor (ODS) continuously monitors air quality and automatically shuts off the unit if oxygen levels drop, giving you confidence in safe indoor operation.
  • Flexible Ignition Control: Choose between a manual safety pilot or a millivolt remote-ready system compatible with wall switches, thermostats, and remotes for effortless fire control.
  • Customizable Glass Media Colors: Available in multiple fire glass colors so you can tailor the look of your fireplace to complement your existing décor and personal style.
Real Fyre Contemporary 18-Inch Vent-Free Gas Fire Glass Set Insert
Specifications
Electrical
  • Power Requirement: None — fully non-electric vent-free fire glass system
  • Ignition Type: Manual safety pilot or millivolt remote-ready ignition options
  • Remote Compatibility: Millivolt models support wall switches, thermostats, and handheld remote controls
Flame & Controls
  • Flame Presentation: Clean, lively flames rise through shimmering fire glass for a sleek contemporary appearance
  • Flame Effect: Real gas flames — not LED or simulated flame effects
  • Fire Media: Tempered fire glass with glowing reflections for added depth and visual impact
General
  • Set Size: Compact 18-inch vent-free fire glass configuration for smaller fireplaces
  • What’s in the Box: 18-inch fire glass set, vent-free burner assembly, fire glass media, sand/granules and embers, control valve and ignition components (based on selected option), user manual

Real Fyre Contemporary 18-Inch Vent-Free Gas Fire Glass Set Insert

The Real Fyre Contemporary 18-Inch Vent-Free Gas Fire Glass Set Insert brings a modern twist to traditional gas fireplaces. Instead of logs, this set uses brilliant fire glass media to create a sleek, glowing ember bed where lively flames dance and shimmer. Perfect for contemporary homes, lofts, and modern design themes, it provides both style and efficient heating.

Crafted by Real Fyre with the same attention to detail found in their log sets, this vent-free fire glass insert offers up to 20,000 BTUs of heat while eliminating the need for venting or a chimney. The glass reflects light and flame beautifully, transforming your fireplace into a centerpiece of warmth and elegance.

This compact 18″ set is ideal for smaller spaces and offers flexible installation in fireplaces that meet vent-free requirements. With options for manual or remote-ready ignition, you can control your fire easily while enjoying the peace of mind provided by built-in safety features.

Durable, efficient, and stylish, the Real Fyre Contemporary Fire Glass Set is a standout choice for homeowners seeking a fresh, modern look.

Real Fyre Contemporary 18-Inch Vent-Free Gas Fire Glass Set Insert Key Features & Benefits

  • Contemporary Style: Fire glass creates a sleek, modern look with reflective shimmer.
  • Vent-Free Heating: Provides nearly 100% heat retention indoors without a chimney.
  • Compact Size: 18″ set fits smaller fireplaces while maximizing visual impact.
  • Customizable Media: Available with different fire glass colors to match your décor.
  • Controlled Heat: Up to 20,000 BTUs for efficient zone heating.
  • Safety First: Oxygen Depletion Sensor ensures safe operation in enclosed spaces.
  • Durable Burner System: Heavy-duty steel with precision porting for reliable flames.
  • Flexible Ignition: Choose manual pilot or millivolt remote-ready control.
  • Remote-Compatible: Works with wall switches, thermostats, and remotes (millivolt models).
  • Trusted Craftsmanship: Made in the USA with Real Fyre’s quality guarantee.
HEAT OUTPUT & FUEL
  • Heat Output: Up to 20,000 BTUs
  • Fuel Type: Natural Gas or Liquid Propane
  • Venting: Vent-Free (no chimney required)
  • Efficiency: ≈ 99% heat retention
BURN AREA
  • Media: Fire glass (available in multiple colors)
  • Set Size: 18″
  • Viewing Area: Shimmering glass bed with tall, lively flames
DIMENSIONS
  • Set Type: 18″ Fire Glass Set
  • Minimum Fireplace Opening: ≈ 24″ W x 17″ H x 13″ D (varies by installation)
  • Compact footprint designed for smaller fireplaces
CONSTRUCTION & MATERIALS
  • Burner: Heavy-duty steel with precision ports
  • Media: Tempered fire glass (color options available)
  • Accessories: Glowing embers and sand/granules included
CERTIFICATIONS & USE
  • Certification: ANSI certified for vent-free indoor use
  • Safety Features: Oxygen Depletion Sensor (ODS)
  • Use: Indoor only
  • Restrictions: Not approved for bedrooms, bathrooms, or certain high-altitude regions
  • Installation: Professional installation recommended
ELECTRICAL SPECIFICATIONS
  • Ignition Options: Manual safety pilot or millivolt remote-ready
  • Power Requirement: None (non-electric operation)
  • Remote Compatibility: Millivolt model supports thermostats, wall switches, and remotes
CLEARANCE REQUIREMENTS
  • Side Wall: Minimum 6″ clearance
  • Mantel: Minimum 12″ clearance above fireplace opening
  • Follow manufacturer guidelines for safe installation
WARRANTY
  • Burner & Fire Glass: 10-Year Limited Warranty
  • Valves & Controls: 3-Year Warranty
DESIGN
  • Series: Contemporary Vent-Free Collection
  • Style: Modern glass fire design (no logs)
  • Flame Effect: Clean, lively flames with shimmering glass reflections
  • Ideal For: Modern interiors, lofts, and transitional spaces
WHAT’S IN THE BOX
  • 18″ Fire Glass Set (with chosen color option)
  • Vent-Free Burner Assembly
  • Fire Glass Media (starter quantity)
  • Sand/Granules & Embers
  • Control Valve & Ignition Components (per ignition type)
  • User Manual
Installation
  • Indoor Only
  • Vent-Free — No Chimney or Gas Required
Downloads & Resources

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Frequently Asked Questions

  • The fireplace's middle width must be at least 19 inches and the depth must be at least 13 inches for this set to fit. The G21 burner itself measures only 10½ inches front-to-back, making it well-suited for smaller or shallower enclosures. Always verify your firebox dimensions against the owner's manual, as minimum fireplace size requirements apply to indoor installations.

  • The 18-inch G21 delivers up to 30,000 BTUs on natural gas or 27,000 BTUs on liquid propane. For indoor installations, the maximum BTU allowed is calculated using the formula: Length × Width × Height × 20, which you can find detailed in the owner's manual. This makes it important to size the burner appropriately to your room's cubic footage.

  • No — the fire glass is not included and must be purchased separately. The 18-inch G21 burner requires approximately 7.5 lbs of fire glass or Fyre Gems to operate properly. You can choose from a wide variety of styles including regular fire glass, reflective fire glass, Fyre Gems, and Diamond Nuggets in multiple colors.

  • The G21 is an ANSI-certified system that comes pre-assembled with a remote control valve and an Oxygen Depletion Sensor (ODS), which automatically shuts off the burner if oxygen levels in the room drop to an unsafe level. It also includes a standing pilot for reliable ignition, and an optional Bluetooth control kit is available for smartphone operation. The manufacturer warns that the unit must not be used with blower inserts or any accessory not specifically certified for vent-free use.

  • The Real Fyre vent-free burner itself carries a 10-year limited warranty, while the fire glass and Fyre Gems are covered by a 5-year warranty. Valves, pilots, and controls are covered by a 1-year limited warranty, excluding batteries. The manufacturer also specifies that using non-Real Fyre controls, parts, or accessories will void all warranties, certifications, and building code approvals.