Safety Information
Continued
12.Do not use the firebox if it has been under water due to the shock hazard that could result with the blower accessary (if installed) in place.
13.Provide adequate clearances around air openings.
Local Codes
Install and use firebox with care. Follow all local codes. In the absence of local codes, use the lat- est edition of The National Fuel Gas Code ANS Z223.1/NFPA 54*. Firebox must be electrically grounded in accordance with the National Electri- cal Code, ANS/NFPA70 (latest edition).
*Available from:
American National Standards Institute, Inc.
1430 Broadway
New York, NY 10018
National Fire Protection Association, Inc.
Batterymarch Park
Quincy, MA 02269
Unpacking
1.Remove all protective packaging from inside firebox. Carefully lift the firebox off the bot- tom corrugated tray.
2.Carton should contain 2 deflective hoods and hardware packet in addition to firebox assembly. If items are missing, inform dealer where you bought firebox.
3.Check all items for any shipping damage. If damaged, promptly inform dealer where you bought firebox.
NOTICE: The firebox identifica- tion label (including model num- ber, serial number, clearances, etc.) is located directly above the brick liner and under the heat shield. See Figure 20, page 15.
Product Features
Operation
This firebox is designed for use with approved ANS Z21.11.2 decorative type unvented room heaters. (Physical size limitations apply. Refer to minimum firebox requirements supplied with log heater.) It requires no outside venting or chimney making in-
Blower Accessory
The FBST firebox will accept the GA3500A ac- cessory. The variable blower allows you to select the fan speed you desire. The blower circulates heated air from the firebox into the room. Use of blower is optional.
Brick Liner
This firebox features a concrete brick liner. As with all concrete liners, this liner may develop slight cracks when exposed to heat. These cracks will not affect the performance of the firebox or
Product
Specifications
1 1/4" 
24" | 1/2" |
|
5/8"
1 3/4" | 4 1/4" |
|
|
3" TYP. |
|
|
|
18 1/2" | 20 | 1/ | " |
| 2 |
| |
36 1/4" |
|
| 40" |
9 1/8" |
|
|
|
| 36 1/2" |
|
|
| 42 1/2" |
|
|
| 44 1/4" |
|
|
3 5/8"
4"
19 1/2"
5 1/2
5 
stallation easy and inexpensive. When used without the blower, the firebox requires no electricity mak- ing it ideal for emergency backup heat.
12"
2 1/4"
Figure 1 - Dual-Sided Firebox
www.desatech.com105116-01D