Vermont Casting EWF30 installation instructions Chimney Requirements Offset Installations

Vermont Castings EWF30

Chimney Requirements - Offset Installations

CHIMNEY FLUE EXIT

		Chimney
		Section
		Elbow		30°
				Return
A		B	G	Elbow
			30°	G
D			Offset
	E	Rise	Elbow
C	6 FT.		30°	TCS8A
		H	Return	Support
	Offset		Elbow
				H
			30°
B
			Offset
			Elbow
	Hearth
	Floor
Example 1		Example 2		Example 3
Notes: G + H cannot exceed 20 feet.				FP269

Air Space Clearances: “SK” Series (2-wall) = 1¹⁄₂” Min. to Combustibles “S” Series (3-wall) = 2” Min. to Combustibles

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"
0	0	3	0	1	56¹⁄₄"	103¹⁄₄"

Illustration Key

The following safety rules apply to offset installations (letters correspond with illustration above):

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

	EWF30
Maximum:	50’
Minimum:
Without Elbows	17’0”
With 2 Elbows*	19’0”
With 4 Elbows*	21’0”

B. Do not use more than 4 elbows per chimney.

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˚ (45˚ in Canada) from the vertical plane in any installation*.

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 SKCS8) is required every 6 feet of angled run of chimney. Chimney supports are required for every 30 feet and 60 feet (SK8 pipe) or 20 feet and 40 feet (3-wall pipe) of ver- tical chimney height above the hearth.

Determine the offset distance of your chimney arrangement from the centerline 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	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"
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"

Fig. 3 Chimney system requirements.

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