C. Using Offsets/Returns

To bypass any overhead obstructions, the chimney may be offset using an offset/return.

An offset and return may be attached together or a chimney section(s) may be used between an offset and return.

Perform the following steps to determine the correct chim- ney component combination for your particular installation:

WARNING

Fire Risk

DO NOT combine offsets to create an offset greater than 30° from vertical.

•Draft will be restricted.

•Measure how far the chimney needs to be shifted to enable it to avoid the overhead obstacle. See Figure 21.2. Use dimension “A” to determine chimney section required to achieve the needed shift.

•After determining the offset dimension, refer to Table 21.1 and find the “A” dimension closest to but not less than the distance of shift needed for your installation.

•The “B” dimension that coincides with the “A” dimension represents the required vertical clearance that is needed to complete the offset and return.

•Read across the chart and find the number of chimney sections required and the model number of those particular chimney parts.

•Whenever the chimney penetrates a floor/ceiling, a ceiling firestop must be installed.

•The effective height of the fireplace assembly is measured from the base of the fireplace.

Table 21.1

Part SL315

Part SL315

 

 

 

 

 

 

 

 

15°

30°

 

SL306

SL312

SL318

SL324

SL336

SL348

A

 

B

A

B

 

 

 

 

 

 

 

1-5/8”

 

13-3/8”

3-7/8”

14-1/2”

 

-

-

-

-

-

-

2-7/8”

 

17-3/4”

6-1/4”

18-5/8”

 

1

-

-

-

-

-

-

 

-

8-5/8”

22-3/4”

 

2

-

-

-

-

-

4-1/2”

 

23-5/8”

9-1/4”

23-3/4”

 

-

1

-

-

-

-

-

 

-

11-5/8”

27-7/8”

 

1

1

-

-

-

-

6”

 

29-3/8”

12-1/4”

29”

 

-

-

1

-

-

-

7-1/4”

 

34”

14-5/8”

33”

 

-

2

-

-

-

-

-

 

-

15-1/4”

34-1/8”

 

-

-

2

1

-

-

 

 

 

 

 

 

 

 

 

 

 

 

-

 

-

17-5/8”

38-1/4”

 

1

-

-

1

-

-

-

 

-

20-5/8”

43-1/2”

 

-

-

-

-

-

-

10-5/8”

 

46-3/4”

21-1/4”

44-5/8”

 

-

-

-

-

1

-

11-7/8”

 

51-3/8”

23-5/8”

48-3/8”

 

1

-

-

-

1

-

-

 

-

26-5/8”

53-7/8”

 

-

-

-

2

-

-

13-3/4”

 

58-3/8”

27-1/4”

55-3/4”

 

-

-

-

-

-

-

15”

 

63”

29-5/8”

59”

 

1

-

-

-

-

1

16-1/2”

 

68-3/4”

32-5/8”

64-1/4”

 

-

1

-

-

-

1

18”

 

74-5/8”

35-5/8”

69-1/2”

 

-

-

1

-

-

1

-

 

-

38-5/8”

74-5/8”

 

-

-

-

1

-

1

-

 

-

41”

78-3/4”

 

1

-

-

1

-

1

22-3/4”

 

91-7/8”

44-5/8”

85”

 

-

-

-

-

1

1

24”

 

96-1/2”

47”

89-1/8”

 

1

-

-

-

1

1

25”

 

103-1/2”

50-5/8”

95-1/2”

 

-

-

-

-

-

2

Example:

Your “A” dimension from Figure 21.2 is

14 1/2 in. (368 mm). Using Table 21.1

the dimension closest to, but not less

than 14 1/2 in. (368 mm) is 14 1/2 in. (368 mm) using a 30° offset/return. It is

then determined from the table that you

would need 34 1/8 in. (867 mm) (Dimen-

sion “B”) between the offset and return.

The chimney component that best fits

your application is one SL324.

A

B

1-1/4 in. (32 mm)

OVERLAP

Figure 21.2 Chimney Offset/

Return

November 11, 2008

Heatilator • Constitution EPA Fireplace • 480-1091C

Page 21

Page 20 Page 22
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Image 21
Hearth and Home Technologies C-40 warranty Using Offsets/Returns, Example
Page 20 Page 22

C-40 specifications

Hearth and Home Technologies (HHT) has long been known for its commitment to innovation and quality in the heating and home comfort industry. One of their standout offerings is the C-40, a versatile and efficient gas fireplace that embodies the brand’s dedication to modern aesthetics and advanced technology. This fireplace is designed to not only provide warmth but also enhance the ambiance of any living space.

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