To achieve desired offset, you may install combinations of 12, 18, 36, or 48 inch lengths of double wall pipe (see Figure 20 and Rise and Offset Chart).

B

Figure 20 A

RISE AND OFFSETS

A

B

48

36

18

12

 

 

 

 

 

 

43/8

163/8

 

 

 

 

91/2

251/4

 

 

 

1

121/2

303/8

 

 

1

 

143/8

34

 

 

 

2

175/8

391/4

 

 

1

1

211/2

46

 

1

 

 

223/4

481/8

 

 

1

2

263/8

547/8

1

 

 

 

263/8

60

 

1

1

 

313/4

633/4

1

 

 

1

343/4

69

1

 

1

 

385/8

755/8

 

2

 

 

397/8

777/8

1

 

1

1

433/4

841/2

1

1

 

 

463/4

873/4

 

2

1

 

487/8

933/8

2

 

 

 

 

 

 

 

 

 

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 21).

RETURN

RETURNELBOW

ELBOW

 

 

 

6' MAX

6' MAX

CEILING

 

 

 

 

 

 

SUPPORT

 

 

 

PIPE

 

OFFSET

OFFSET

V12S-10DM

 

 

6' MAX

ELBOW

ELBOW

 

 

 

RETURN

ELBOWRETURN

ELBOW

6' MAX

6' MAX

6' MAX

OFFSET

ELBOW

TYPICAL OFFSET INSTALLATIONS

Figure 21

FINISHING YOUR CHIMNEY SYSTEM

10 FOOT RULE

All chimney termination 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 22).

10'

LEVEL OF FLUE

OR LESS

GAS OUTLET

 

10'

2' MIN.

3' MIN.

 

 

2' MIN.

 

3' MIN

10 FOOT RULE

 

Figure 22

 

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.

55505

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Desa VPN36 3-SIDED operating instructions Rise and Offsets, Finishing Your Chimney System Foot Rule