Glass Doors

If glass doors are to be installed on these fireplaces, refer to specific installation instructions packed with the glass doors. Use only the doors that are listed for use with these fire- places. Use of other non-listed glass door on these fireplaces may constitute a potential fire hazard and is not recommended.

CAUTION: CERTAIN GLASS DOORS OVERLAP THE BLACK METAL FACING OF THE FIRE- PLACE. IF THE FIREPLACE HAS BEEN FACED WITH NONCOMBUSTIBLE MATERIALS, THERE MIGHT NOT BE SUFFICIENT CLEARANCE TO INSTALL THE GLASS DOORS OF YOUR CHOICE. ENSURE ADEQUATE CLEARANCE IS MAINTAINED AT ALL TIMES SO AS NOT TO INTERFERE WITH THE INSTALLATION AND OPERATION OF GLASS DOORS.

COLD CLIMATE INSULATION

If you live in a cold climate, it is especially important to seal all cracks around the fireplace opening with noncombustible material and wherever cold air could enter the room. Surrounding materials must be caulked where it meets the black metal facing of the fireplace to avoid cold air intrusion. Use noncombus- tible caulking material only on fireplace facing to seal. Also, the outside air inlet duct should be wrapped with noncombustible insulation to minimize the formation of condensation. Do not place insulation materials on top of fireplace or against chimney sections.

Note: A 2" air space must be preserved for all combustible materials extending for any continuous length adjacent to the chimney.

It is especially important to insulate between the studs of an outside chase cavity and under the floor if the floor is above ground level. Do not place insulation directly against the fireplace or chimney system.

FIREPLACE FINISHESMantels and Trim

It is sometimes best to frame your fireplace after it is positioned and the chimney is in- stalled. Frame enclosure for chimney and fireplace with 2 x 4’s (or heavier) lumber.

Note: The header may rest on the two (2) metal top spacers on top of the unit but the header must not be notched to fit around the spacers.

18

These fireplaces may sit directly on a combustible surface. A 2" air space is required between combustible framing and the chim- ney. A 1" air space is required between combustible framing and fireplace outer wrapper. Combustible mantels and trim may be installed 12" above the fireplace opening as per NFPA 211, Section 7-2.3.3. and Figure 42. If a mantel is of a noncombustible material, it is exempt from these requirements as long as it does not interfere with the installation or operation of glass doors.

12"

Header

Max.

 

 

1 1/2"

 

False

 

Header

Combustible

 

Mantel

 

and Trim

Spacer

12"*

 

Min.

 

 

Finished

8 3/8"*

Wall

Fireplace

Opening

*Both Of These Dimensions Must Be At Least 18” When An Unvented Gas Log Set Rated At 26,000 BTU Or Higher Is Used. (Maximum 40,000 BTU)

Typical Installation

Figure 42

Hearth Extensions and Wall Shields

A hearth extension must be installed with all fireplaces. It is to protect the combustible floor in front of the fireplace from both radiant heat and sparks. The hearth extension must extend 8" beyond both sides of the fireplace opening and 16" beyond the front (Figure 43 ). Use a hearth extension constructed of a durable noncombustible material having an equal or greater insulating value of k = 1.28BTU/IN FT2 HR ° F or a thermal resistance that equals or exceeds r = .78 HR ° F FT2 IN/BTU. With these values, determine the minimum thickness/ma- terial required using the formula and the Table on page 17.

Note: Any noncombustible material whose k value is less than 1.28 or whose r value is more than .78 is acceptable.

NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.

If the fireplace is installed on a combustible floor, use the metal safety strips (provided) on the floor extending half under the fireplace and half under the hearth extension (refer to Figures 6 and 7 ).

A wall shield is required where a continuous perpendicular side wall is within 12" of the fireplace opening, (Figure 44 ). Use a 24" W x 30" H wall shield constructed of millboard or a durable, noncombustible material having an equal or greater insulating value than K = .54BTU/ IN FT2 HR ° F. At no time may a perpendicular side wall be closer than 8".

If fireplace is installed diagonally across a 90° corner; no wall shields are required.

Metal Safety Strip

 

 

8"

 

12"

 

 

(305mm) E

 

 

(203mm)

 

Min.

 

D

C

 

 

 

 

 

20" B

A 20"

 

 

(508mm)

(508mm)

 

 

Outside Corner

 

Figure 43

 

 

 

 

Hearth Extension Dimensions

 

A

20" (508 mm)

 

 

B

38" (965 mm)

 

 

C

8" (203 mm)

 

 

D

20" (508 mm)

 

 

E

12" (305 mm)

 

 

 

 

If Less Than 12"

 

40"

 

(305mm) Wall

 

 

Shield Required

 

(1016mm)

 

 

 

 

 

 

 

 

 

Wall Shield

 

Wall

 

 

Not Required

40"

Shield

 

 

On This Wall

(1016mm)

 

 

 

Metal Safety

Strip

20"20"

(508mm) (508mm)

Inside Corner

Figure 44