Real Fyre G21 See-Thru Vent-Free Glass Burner with On/Off Remote
The Real Fyre G21 See-Thru is a vent-free contemporary glass burner for a fireplace that is open front and back: a stainless steel burner that burns through a bed of Fyre Glass or Fyre Gems, with a glass panel on each side. This listing is the see-thru burner with on/off remote, in 18" or 24", order number G21-GL-2-##-12 for natural gas or G21-GL-2-##-12P for propane.
The glass media is not included. The 18" needs 10 lbs and the 24" needs 12-1/2 lbs of Real Fyre glass or gems, ordered separately.
What's Included
- G21 see-thru stainless steel vent-free burner with remote control valve and ODS safety pilot installed
- Two glass front panels
- Two removable reflective covers
- Flex connector
- Damper clamp
- RR-1A remote transmitter and receiver
Key Features
- 2 sizes: 18" and 24"
- For see-through fireplaces open front and back
- On/off remote included
- Natural gas or propane; order the fuel you have (not field convertible)
- Glass or gems sold separately
What to Order With It
The burner cannot be used without media.
Required (choose one):
For a fireplace open on one side only, see the standard G21: G21 18", G21 24", G21 30".
Order the fuel you have. Vent-free burners cannot be converted from one gas to the other.
Specifications
| Size |
Natural Gas |
Propane |
BTU, Natural Gas |
BTU, Propane |
Glass Required |
| 18" |
G21-GL-2-18-12 |
G21-GL-2-18-12P |
37,000 |
35,000 |
10 lbs |
| 24" |
G21-GL-2-24-12 |
G21-GL-2-24-12P |
40,000 |
40,000 |
12-1/2 lbs |
| Vent Type |
Vent-free |
| View |
See-through (two-sided) |
| Control |
On/off remote; basic transmitter and receiver included |
| Burner |
Stainless steel with polished stainless steel trim |
| Certification |
ANSI Z21.11.2 unvented room heater and ANSI Z21.60 vented decorative appliance |
BTU ratings are from the 2026 Real Fyre price list.
Minimum Fireplace Dimensions
From the G21-GL-2 owner's manual.
| Size |
Width |
Depth |
Height |
| 18" |
22" |
16" |
17" |
| 24" |
28" |
16" |
17" |
Vent-free burners are heaters and have room-size limits: the manual requires at least 50 cubic feet of room volume per 1,000 BTU. Burners over 10,000 BTU cannot go in a bedroom and burners over 6,000 BTU cannot go in a bathroom. Some states and cities restrict or prohibit vent-free gas appliances, so check your local code before ordering. Glass doors must be fully open while the burner is on.
Warranty
Indoor burners and stainless steel burners, excluding controls: ten years. Valves, pilots and controls: one year. Batteries are not covered. Fyre Glass, Fyre Gems and Diamond Nuggets: ten years. The warranty is from R.H. Peterson Co., applies to the original purchaser for single-family residential use, runs from the purchase date and needs proof of purchase.
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