Vanguard FBST Built-In Firebox Installation, Mantel Clearances for Built-In Installation

at All Times

Firebox Top

Wire-mesh

Screen

9 1/4" 6" 3"

Top Frame (Combustible Material)

Mantel Shelf

CAUTION: Do not allow the vent-free gas log heater to touch or extend beyond the firebox screen.

If your installation does not meet the above mini- mum clearances in Figure 7, you must:

• raise the mantel to an acceptable height,

OR

• remove the mantel.

Wall board or facing material (above firebox) may be of combustible material, including decorative mantel ornaments or other similar projections off of the facing material.

INSTALLATION

Continued

Minimum clearances to combustibles are:

• Sides of outer casing			0" min.
• Drywall to sides and top of			0" min.
	front face
•	Ceiling to opening		42' min.
• Floor (see Minimum Wall			0" min.
	and Ceiling Clearances, note C)
•	Perpendicular walls		4' min.
	Right and Left
• Distance to Facing Walls			36" min.
See Figures 5 and 6.
	Ceiling	0" Min. Clearance to
		Upper Frame/Wallboard
			42" Min.
	8" Min.
			0" to Wood Floor

Figure 5 - Minimum Clearance -

Front View

1/2" Min. Clearance to Combustibles

24"

44 1/4"

4" Min. from the Perpendicular

Side Wall to the Edge of Facial

Figure 6 - Minimum Clearance - Top View

Mantel Clearances for Built-In

Installation

If placing custom mantel above built-in firebox, you must meet the minimum allowable clearance between mantel shelf and top of firebox opening shown in Figure 7. These are the minimum allowable mantel clearances for a safe installation. Use larger clearances wherever possible to minimize the heating of objects and materials placed on the mantel.

Combustible

Material 1 1/2" 12" 15" 18"

Max Thickness

Note: Do not

7" Min. cover louver openings.

Note: All vertical measurements are from top of fireplace

Supplied hood to bottom of Firebox Hoods mantel shelf. These Must Be Used minimum clearances

replace any other recommended clearances supplied with your ANS Z21.11.2 approved gas logs.

Figure 7 - Minimum Mantel Clearances

for Built-In Installation

Built-In Firebox Installation

Built-in installation of this firebox involves installing firebox into a framed-in enclosure. This makes the front of firebox flush with wall. Optional perimeter brass trim accessories are available (see Accessories, page 18). The brass trim will extend past sides of firebox approximately 1/2". This will cover the rough edges of the wall opening. If installing a mantel above the firebox, you must follow the clearances shown in Figure 7. Follow the instructions below to install the firebox in this manner.

1.Frame in rough opening. The firebox framing should be constructed of 2 x 4 lumber or heavier.

Construct framing using dimensions shown in

Figure 8 and 9, page 10. It is recommended that the framing be constructed first and the unit be placed in position by removing the nailing flanges from one side. After sliding the unit into place, the outer most flanges may be replaced and nailed to the framing on all sides before applying the wallboard to the exterior framing.

105116-01D www.desatech.com