Lennox Hearth LA41TCF CHIMNEY 30 OFFSET THROUGH FLOOR OR CEILING, Installing The Chimney System

Step 4. Fireplace should be secured to side framing members using the full length nailing tabs at the top and bottom of the fireplace front face. Use 8d nails or equivalent (Figure 17 ).

8d Nail Or

Equivalent

Figure 17

Note: The nailing tabs and the area directly behind the nailing tabs are exempt from the clearances described on page 5. Maintain at

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 18 ). Then plumb from ceiling or roof level directly above hole which has just been completed.

Figure 18

Attic Above

Firestop Spacer

Figure 20

CHIMNEY 30° OFFSET THROUGH FLOOR

OR CEILING

It may be necessary to assemble the chimney at 30° when passing through the floor or ceiling area. Use the F10FS30-2 firestop spacer as shown in Figures 21 and 22. Support the chimney at floor or ceiling penetration with a FTF10 stabilizer if distance of chimney below ceiling is 10' or more. Maintain 2" minimum air space to combustibles from chimney sections.

Attic Space

least 1/2" clearance from the firebox wrapper to the framing at the closest point of contact, directly adjacent to the flange.

INSTALLING THE CHIMNEY SYSTEM

Step 1. Before continuing, check the operation of the damper, as described on page 4, (refer to Figure 3 ).

Step 3. Position appropriate firestop spacer at ceiling and nail temporarily with two (2) 8d nails. Use flat firestop spacer, Model F10FS-2, if chimney penetrates ceiling vertically. If chim- ney penetrates ceiling at 30° angle (offset chimney), use 30° firestop spacer, Model F10FS30-2. Use one nail on opposite sides to hold firestop spacer in position. Nail perma- nently, using at least two (2) more 8d nails, after chimney sections have been assembled

F10FS30-2 Firestop Spacer

2" Min.

Air Space

2" Min.

Air Space

FTF10-S4

Stabilizer

10'

Max. 30° Firestop

And Attic Above

8

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" CHIMNEY AIR SPACE TO COMBUSTIBLE FRAMING MEM- BERS THROUGHOUT VERTICAL OR OFFSET CHIMNEY INSTALLATION.

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

Reference Figures 15 and 16 and charts Fram- ing Dimensions for Ceiling and Roof, which specify minimum ceiling and roof dimensions.

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

through the firestop spacer and after any nec- essary adjustments have been made. Firestop spacer must be secured by at least four (4) 8d nails when completely installed.

Note: If there is a room above ceiling level, firestop spacer must be installed on the bottom side of the ceiling. If an attic is above ceiling level, firestop spacer must be installed on top side of ceiling joist (Figures 19 and 20 ).

Room Above

Firestop Spacer

Figure 19

NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.

Figure 21

Room Above
F10FS30-2	2" Min.
Firestop Spacer
	Air Space
2" Min.	FTF10-S4
Air Space	Stabilizer
10'	30° Firestop
Max.	And Room Above

Figure 22