Step 4. The fireplace should be secured to side framing members using nailing tabs. Use 8d nails (Figure 26 ).

Nailing

Flange

Framing

Stud

Figure 26

Note: The nailing tabs are exempt from the fireplace clearances described on the fireplace clearance label.

For Canadian Installations Proceed with Steps 5–8.

Note:W.H.I. listed only for installation in Canada.

Step 5. Remove one of the knockouts from either the left or right side of the fireplace transition. Attach the 4" (102 mm) collar from the FOAK-4 chimney air kit to the transition, using the four (4) No. 8 x ¹⁄₂" screws provided (Figure 27 ).

Figure 27

10

Step 6. Connect the 4" (102 mm) Class 0 or Class 1 air duct to the collar (just mounted) with two (2) No. 6 x ³⁄₈" screws provided in the hardware kit.

Step 7. Route the Class 0 or Class 1 air duct out the back or side wall, up through the ceiling or floor joists to an outside wall. The air duct should be located above snow level.

Note: If the fireplace is installed against an inside wall, the Class 0 or Class 1 air duct may be extended into a ventilated attic space at least 18" (457 mm) above the attic floor. Secure the duct hood to a vertical post with the inlet positioned downward. Ensure nothing blocks the hood opening. Do not terminate the duct hood higher than the chimney.

Step 8. Cut or frame a hole through the outside wall for the installation of the duct inlet hood. A 4 ¹⁄₂" (114 mm) diameter hole is sufficient. Feed the loose end of the flexible air duct through the hole cut for the inlet hood and attach to collar on inlet hood using two (2) No. 6 x ³⁄₈" screws provided. Insert hood into opening. Secure in place with the No. 8 x 1 ¹⁄₂" screws provided or with nails driven through holes in hood flange. Seal with noncombustible waterproof silicon type caulking. If additional air duct is needed, use Class 0 or Class 1 metallic duct.

INSTALLING THE CHIMNEY SYSTEM

Step 1. Check flue damper for proper opera- tion. To open, push handle up and release. Damper will open automatically. To close, pull handle down and release damper will fall to the closed position.

Note: The damper may be operated from both firebox openings.

Step 2. Using standard construction framing techniques, construct opening for chimney route up through the ceiling(s) and roof or through an outside chase.

Framing must maintain adequate minimum air space clearance at all times.

CAUTION: ALLOW MINIMUM 2" (51 MM)

CHIMNEY AIR SPACE TO COMBUSTIBLE FRAMING MEMBERS THROUGHOUT VERTICAL OR OFFSET CHIMNEY INSTALLATION. ALSO MAINTAIN AIR SPACE ON TOP OF THE FIREPLACE AS DEFINED BY THE SPACERS AND STANDOFFS.

NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.

A minimum 2" (51 mm) air space must be reserved for all combustible materials extending for any continuous length surrounding the chimney.

Reference Figures 24 and 25 and charts “Fram- ing Dimensions for Ceiling and Roof” on page 8, which specify minimum ceiling and roof dimensions.

For new construction, to determine chimney center line, use plumb line from roof or ceiling above fireplace to center of flue collar on fireplace.

For remodeling, plumb to center of flue collar from ceiling above, drive nail through ceiling from below to mark position, then mark and cut to passage from above ceiling (around nail) (Figure 28 ). Then plumb from ceiling or roof level directly above hole which has just been completed.

Plumb Line

Figure 28

Step 3. Position appropriate firestop spacer at ceiling and nail temporarily with two (2) 8d nails. Use flat firestop spacer, Model F8FS-2, if chimney penetrates ceiling vertically. If chimney penetrates ceiling at 30° angle (offset chimney), use Model F8FS30-2. Nailed, one each on opposite sides to hold firestop spacer in position. Nail permanently, using at least two (2) more 8d nails, after chimney sections have been assembled through the firestop spacer and after any necessary adjustments have been made. Firestop spacer must be secured by at least four (4) 8d nails when completely installed.