B. Using Offsets/Returns

•Use an offset/return to bypass overhead obstructions.

•An offset and return can be used as a single entity or separated by chimney section(s).

WARNING! Risk of Fire! DO NOT use offset/returns greater than 30°. Chimney draft will be restricted and could cause overheating and fire.

•Measure the shift needed to avoid the overhead obstruction. Refer to dimension A in Figure 8.3.

•Find the appropriate A dimension listed in Table 8.2.

•The B dimension coinciding with the A dimension measurement in Table 8.2 represents the required vertical clearance needed to complete the offset/return.

•Read across the chart to find the number of chimney sections/model numbers needed between the offset and return.

A

B

1-1/4 in. (32 mm)

OVERLAP

Figure 8.3 Chimney Offset/Return

Example:

Your “A” dimension from Figure 8.3 is 14 1/2 in. (368 mm). Using Table 8.2 the dimension closest to, but not less than 14 1/2 in. (368 mm) is 15 3/4 in. (400 mm) using a 30° offset/return.

You determined from the table that you would need

36 5/8 in. (930 mm) (Dimension “B”) between the offset and return.

The chimney component that best fits your application is two SL1112s.

ÎTable 8.2

 

A

 

B

SL1106

SL1112

SL1118

SL1136

SL1148

in.

 

mm

in.

 

mm

SL406

SL412

SL418

SL436

SL448

4 7/8

 

124

17 7/8

 

454

-

-

-

-

-

7 1/4

 

184

22

 

559

1

-

-

-

-

 

 

 

 

 

 

 

 

 

 

 

9 3/4

 

248

26 1/8

 

664

2

-

-

-

-

10 1/4

 

260

27 1/4

 

692

-

1

-

-

-

12 3/4

 

324

31 3/8

 

797

1

1

-

-

-

 

 

 

 

 

 

 

 

 

 

 

13 1/4

 

337

32 3/8

 

822

-

-

1

-

-

15 3/4

 

400

36 5/8

 

930

-

2

-

-

-

 

 

 

 

 

 

 

 

 

 

 

18 1/8

 

460

40 3/4

 

1035

1

2

-

-

-

18 3/4

 

476

41 3/4

 

1060

-

1

1

-

-

 

 

 

 

 

 

 

 

 

 

 

21 3/4

 

552

4 7

 

1194

-

-

2

-

-

22 1/4

 

565

48

 

1219

-

-

-

1

-

24 3/4

 

629

52 1/8

 

1324

1

-

-

1

-

 

 

 

 

 

 

 

 

 

 

 

27 3/4

 

705

57 3/8

 

1457

-

1

-

1

-

28 1/4

 

718

58 3/8

 

1483

-

-

-

-

1

 

 

 

 

 

 

 

 

 

 

 

30 3/4

 

781

62 1/2

 

1588

1

-

-

-

1

33 3/4

 

857

67 3/4

 

1721

-

1

-

-

1

 

 

 

 

 

 

 

 

 

 

 

36 3/4

 

933

7 3

 

1854

-

-

1

-

1

39 3/4

 

1010

78 1/8

 

1984

-

-

-

2

-

41 1/8

 

1045

82 3/8

 

2092

1

-

-

2

-

45 3/4

 

1162

88 1/2

 

2248

-

-

-

1

1

48 1/8

 

1222

92 3/4

 

2356

1

-

-

1

1

 

 

 

 

 

 

 

 

 

 

 

51 3/4

 

1314

98 7/8

 

2511

-

-

-

-

2

Proper assembly of air cooled chimney parts results in an overlap of chimney joints of 1-1/4 in. (32 mm). Effective length is built into this table.

28

Heatilator • I60, I80 • 4013-250 • Rev C • 11/08

Page 27 Page 29
Page 28
Image 28
Hearth and Home Technologies I60, I80 owner manual Using Offsets/Returns, Example
Page 27 Page 29

I80, I60 specifications

Hearth and Home Technologies’ I60 and I80 are highly regarded as premier options in the realm of direct vent gas fireplaces. Both models are designed to provide elegant aesthetics and outstanding performance, making them ideal for any living space. The I60 features a 60,000 BTU input, while the I80 boasts a higher input of 80,000 BTUs, ensuring ample warmth and comfort. These fireplaces are well-suited for large rooms and homes with open floor plans, delivering significant efficiency alongside superior design.

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