Owner`s manual

ManualsBrandsR.H. Peterson ManualsLawn and GardenG21-GL-18C-12(P)

MINIMUM CLEARANCES TO COMBUSTIBLES

If the vent-free burner system is installed in a factory

built ﬁ replace, follow the manufacturer’s guidelines for

minimum clearances to combustibles.

In the absence of such guidelines, follow the instructions

below:

Clearances to Combustible Construction:

Sidewalls

: 16" from side of ﬁ replace opening (Fig. 6-1).

Ceiling: 42" from top of ﬁ replace opening (Fig. 6-1).

Flooring: See IN FRONT OF FIREPLACE section below.

Mantel: See ABOVE THE FIREPLACE section below &

Fig. 6-1. Also see Fig. x-1, & x-2 on following page).

Note: Clearances to combustible construction

are those distances required to ensure that

ﬁ replace mantels, facings, walls, ceilings, and

ﬂ oorings will not catch ﬁ re.

In most cases, these clearances should also be

adequate to prevent any discoloration or warping due

to heat. However, every gas burner installation presents

a different and unique set of circumstances involving

many variables beyond the control of the manufacturer.

These include paint or ﬁ nish composition, previous

exposure to heat, methods and quality of construction,

air ﬂ ow patterns, glass doors, fans or blowers, etc.

Because of these variables, we cannot guarantee that

heat warping or discoloration will never occur. The

potential for heat warping or discoloration may exist

no matter what item(s) you are burning in the ﬁ replace,

including wood.

The dimensions in Fig. 6-1 are MINIMUM

CLEARANCES to maintain when you install this

burner system. BOTH SIDES of the ﬁ replace opening

MUST BE AT LEAST 16" from any combustible

sidewalls. The ceiling MUST BE at least 42" from

the top of the ﬁ replace opening.

ABOVE THE FIREPLACE:

To install the vent-free burner system, there must ALWAYS be noncombustible or heat resistant material

immediately above the ﬁ replace opening. Heat resistant materials (i.e., marble or slate) must be at least

thick. Sheet metal should not be installed onto combustible materials.

If you DO NOT install a ﬁ replace hood, there MUST be at least 12" of noncombustible or heat resistant material

immediately above the ﬁ replace opening (see A in Fig. x-1 on the following page). If you DO install a ﬁ replace

hood, there MUST be at least 10" of noncombustible or heat resistant material immediately above the ﬁ replace

opening (see B in Fig. x-2 on the following page). If there is a wooden mantel, shelf, or other combustible

projection above the ﬁ replace, follow the information in the Figures on the next page.

EXAMPLE: If the ﬁ replace has a combustible projection (mantel or shelf) 20" above the top of the ﬁ rebox,

the maximum horizontal projection out from the face of the ﬁ replace will be:

1. If a ﬁ replace hood is not installed - 2.5" (see Fig. x-1 on the following page).

2. If a ﬁ replace hood is installed ------ 10" (see Fig. x-2 on the following page).

A ﬁ replace hood deﬂ ects heat away from the ﬁ replace face and mantel, reducing the potential for heat related

warping or discoloration. The use of a ﬁ replace hood is highly recommended.

IF YOU CANNOT MEET THESE MINIMUM CLEARANCES, YOU MUST OPERATE THE VENT-FREE

BURNER SYSTEM WITH THE CHIMNEY FLUE DAMPER OPEN.

IN FRONT OF THE FIREPLACE:

Be certain that combustible ﬂ ooring material (i.e.: carpet, tile, etc.) is not too close to the vent-free unit. If the

vent-free burner system is at ﬂ oor level or less than 6" above the ﬂ oor, there MUST be at least 12" (1 foot) of

noncombustible material between the front of the ﬁ replace and any combustible ﬂ ooring.

42"

16"

Fig. 6-1

Minimum clearances to

side walls and ceiling

Side wall: 16" from side of ﬁ replace opening.

Ceiling: 42" from top of ﬁ replace opening.