Venting Installation

Continued

Existing

Ceiling Frame

Firestop Spacer

Screws or Staples (Min. of 8)

Figure 19 - Firestop Spacer with Living

Space Above Ceiling

 

Screws or Staples

Firestop

(Min. of 8)

Spacer

Existing

 

 

Ceiling

 

Frame

Uncommon circumstances such as neighboring hills, tall trees, or strong wind areas can cause down drafts in chimney system. In such cases, going beyond the minimum recommended height would be preferable to provide a better draw.

The fireplace height approved for any chimney run with this fireplace system is 40 feet measured from bottom of fireplace to flue

outlet-end of pipe (see Figure 22).

WARNING: Do not operate an unvented gas log set in this fireplace with the chimney removed.

RLT-12D RLT-12D STL-12D

Storm

Collar

Figure 20 - Firestop Spacer with Attic

Space Above Ceiling

10 Foot Rule

All chimney terminations must extend a mini-

mum of 3 feet above the highest point where it

passes through the roof and must be at least 2

feet above roof with a 10 foot horizontal span

(see Figure 21).

IMPORTANT: If an exposed portion of chim-

ney is greater than 4 feet above the roofline,

use support wires to keep chimney secure.

Support wires may be attached to outer pipe

of chimney with screws, if screws do not

penetrate inner flue pipe.

Flashing

MINIMUM

HEIGHT

15 FT.

(4.5m)

Firestop

Spacer

MAXIMUM

HEIGHT

CHASE

TERMINATION

40FT.

(12m)

Figure 21 - 10 Foot Rule

 

Minimum / Maximum Chimney

 

Height

 

The minimum height of the chimney (mea-

 

sured from the base of the fireplace to the flue

 

gas outlet-end of pipe) is 16 feet for a straight

 

run, 16 feet minimum for a run with 1 elbow set

Figure 22 - Maximum Chimney Height

and 25 feet minimum for a run with 2 elbow

 

sets. (A set consists of one starter elbow and

 

one return elbow.)

 

115603-01D

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