SUPPORT SECTIONS

10 FINISHING YOUR CHIMNEY SYSTEM

10 Foot Rule

Minimum Chimney Height

Maximum Chimney Height

VENTING INSTALLTION

Continued

Maximum length of pipe between supports is 6 feet of angled run. A maximum of two 6 foot angled run sections per chimney system (See Figure 22).

RETURN

RETURNELBOW ELBOW

 

 

6’ MAX

 

 

 

(15.2cm)

 

6’ MAX

CEILING

 

 

(15.2cm)

 

 

SUPPORT

 

 

 

 

 

 

PIPE

 

OFFSET

OFFSET

V12S-8DM

 

6’ MAX

ELBOW

ELBOW

 

RETURN

 

(15.2cm)

RETURN

 

 

ELBOW

 

 

 

 

ELBOW

 

 

 

6’ MAX

 

 

 

(15.2cm)

 

 

 

 

6’ MAX

6’ MAX

 

 

(15.2cm)

(15.2cm)

 

OFFSET

ELBOW

FINISHING YOUR CHIMNEY SYSTEM

10 Foot Rule

All chimney terminations must extend a minimum of 3 feet above the highest point where it passes through the roof, and must be at least 2 feet above the roof within a 10 foot horizontal span (see Figure 23).

IMPORTANT: If an exposed portion of chimney is greater than 4 feet above the roof line, use support wires to keep chimney secure. The support wires may be attached to the outer pipe of the chimney with screws, provided the screws do not penetrate the inner flue pipe.

Figure 23 - 10 Foot Rule

 

Minimum Chimney Height

Figure 22 - Typical Offset Installations

The minimum chimney height (measured from bottom of fireplace to

flue gas outlet-end of pipe) is 16 feet for a straight run, 16 feet minimum

 

 

for a run with 1 elbow set, and 25 feet minimum for a run with 2 elbow

 

sets. (A set consists of one starter elbow and one return elbow.)

 

Uncommon circumstances such as neighboring hills, tall trees, or

 

strong wind areas can cause down drafts in the chimney system. In

 

such cases going beyond the minimum recommended height would

 

be preferable to provide a better draw.

 

Maximum Chimney Height

 

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 24, page 11

For more information, visit www.desatech.com

115607-01A

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Desa (V)PN36-A manual Finishing Your Chimney System

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