Monessen Hearth 624WBPF manual Chimney Requirements Offset Installations, Elbow Offsets

CHIMNEY OFFSET INSTALLATION 624WBPF Woodburning Fireplace

Chimney Requirements - Offset Installations

Chimney Flue Exit

			Chimney
			Section
			Elbow			30°
			B			Return
A				G		Elbow
						G
	D				30°
		E			Offset
			Rise		Elbow
		6 FT.
						11CS Sup-
	C
					30°	port
		Offset		H	Return
					Elbow
						H
	B				30°
					Offset
					Elbow
		Hearth Floor
	Example 1			Example 2		Example 3
Notes: G + H cannot exceed 20 feet.						FP269
*11CF Chimney airspace clearance = 2" minimum.

Offset

Rise

							FP282
	30° Elbow Offsets
	1' 1¹⁄₂'		3'	4'		Offset	Rise
				Chimney Support
	0	0	0	0	0	3"	11"
	1	0	0	0	0	8¹⁄₄"	20"
	0	1	0	0	0	11¹⁄₄" 25¹⁄₄"
	2	0	0	0	0	13¹⁄₂" 29¹⁄₄"
	1	1	0	0	0	16¹⁄₂" 34¹⁄₄"
	0	0	1	0	0	20¹⁄₄" 40³⁄₄"
	2	1	0	0	0	21³⁄₄" 43¹⁄₂"
	0	0	0	1	0	26¹⁄₄" 51¹⁄₄"
	0	1	1	0	0	28¹⁄₂" 55¹⁄₄"
	1	0	0	1	0	31¹⁄₂" 60¹⁄₄”
	0	1	0	1	0	34¹⁄₂" 65¹⁄₂"
	0	0	2	0	0	37¹⁄₂" 70³⁄₄"
	1	1	0	1	1	41¹⁄₂" 77³⁄₄"
	0	0	1	1	1	45" 83³⁄₄"
	0	1	2	0	1	47¹⁄₄" 87¹⁄₂"
	0	0	0	2	1	51"	94"
0		1	1	1	1	53¹⁄₄"	98"

Illustration Key

The following safety rules apply to offset installations (letters correspond with illustra- tion above):

A. Height of the chimney is measured from the hearth to the chimney exit.

		624WBPF
Max.:		86’0”
Min.:
0	Elbows	14’0"
2	Elbows*	14’0”
4	Elbows*	21'0"

B. Do not use more than 4 elbows per chim- ney.

Attach the straps of the return (top) elbow to a structural framing member.

The offset (first) elbow of any pair does not have straps.

C. The chimney cannot be more than 30° from the vertical plane in any instal- lation.

D. The maximum length of the angled run of the total chimney system is 20 feet. (G plus H cannot exceed 20 feet.)

E. A chimney support (Model 11CS) is required every 6 feet of angled run of chimney. Chimney supports are required for every 30 feet and 60 feet chimney height above the hearth.

Determine the offset distance of your chimney arrangement from the center- line of the fireplace to the centerline of the chimney where it is to pass through the first ceiling.

NOTE: This offset distance may not be your full offset distance. See Examples 2 and 3.

0	0	3	0	1	56¹⁄₄" 103¹⁄₄"
0	1	0	2	1	59¹⁄₄" 108¹⁄₂"
0	0	2	1	1	62¹⁄₄" 113¹⁄₂"
0	1	3	0	1	64¹⁄₂" 117¹⁄₂"
0	0	1	2	1	68¹⁄₄"	124"
0	1	2	1	1	70¹⁄₂"	128"
0	0	0	3	1	74¹⁄₄" 134¹⁄₂"
0	1	1	2	2	78" 140³⁄₄"
0	0	3	1	2	81"	146"
0	1	0	3	2	84" 151¹⁄₄"
0	0	2	2	2	87" 156¹⁄₂"
0	1	3	1	2	89¹⁄₄" 160¹⁄₄"
0	0	1	3	2	93" 166³⁄₄"
0	1	2	2	2	95¹⁄₄" 170³⁄₄"
0	0	0	4	2	99¹⁄₄" 177³⁄₄"
0	1	1	3	2	101¹⁄₄" 181³⁄₄"
0	0	3	2	2	104¹⁄₄" 186¹⁄₄"
0	1	0	4	2	107¹⁄₄" 191¹⁄₂"
0	0	2	3	2	110¹⁄₄" 196³⁄₄"
0	1	3	2	3	114"	203¹⁄₄"

Figure 17

0	0	1	4	3	117³⁄₄"	209³⁄₄"
0	1	2	3	3	120"	213¹⁄₂"
0	0	0	5	3	123³⁄₄"	220"

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