Vermont Casting SC42A, SR42A, SR36A, SC36A manual 30˚ Elbow Offsets, Illustration Key, Offset Rise

SR/SC Series "A" Woodburning Fireplace

Chimney Requirements - Offset Installations

CHIMNEY FLUE EXIT

OFFSET

																														RISE
													CHIMNEY
													SECTION
											30°																		IWF282
																			ELBOW
																												30˚ Elbow Offsets
																		RETURN
														B			G					ELBOW
	A																															Chimney Support
																		30°								G		1'	1¹⁄₂'	3'	4'		Offset	Rise
																					OFFSET
						D																						0	0	0	0	0	3"	11"
										E											ELBOW							1	0	0	0	0	8¹⁄₄"	20"
												RISE
																												0	1	0	0	0	11¹⁄₄"	25¹⁄₄"
									6 FT.
						C												30°						SKCS8				2	0	0	0	0	13¹⁄₂"	29¹⁄₄"
																H			RETURN					SUPPORT				1	1	0	0	0	16¹⁄₂"	34¹⁄₄"
																				ELBOW
								OFFSET																				0	0	1	0	0	20¹⁄₄"	40³⁄₄"
																									H			2	1	0	0	0	21³⁄₄"	43¹⁄₂"
				B														30°										0	0	0	1	0	26¹⁄₄"	51¹⁄₄"
																			OFFSET									0	1	1	0	0	28¹⁄₂"	55¹⁄₄"
																			ELBOW									1	0	0	1	0	31¹⁄₂"	60¹⁄₄”
									HEARTH																			0	1	0	1	0	34¹⁄₂"	65¹⁄₂"
																									0	0	2	0	0	37¹⁄₂"	70³⁄₄"
									FLOOR
																												1	1	0	1	1	41¹⁄₂"	77³⁄₄"
																												0	0	1	1	1	45"	83³⁄₄"
				Example 1											Example 2								Example 3
																												0	1	2	0	1	47¹⁄₄"	87¹⁄₂"
	Notes: G + H cannot exceed 20 feet.																										IWF269
																												0	0	0	2	1	51"	94"
					Air Space Clearances: SK8 (2-wall) = 1¹⁄₂" and "S" Series (3-wall) = 2"
																												0	1	1	1	1	53¹⁄₄"	98"
Illustration Key																												0	0	3	0	1	56¹⁄₄"	103¹⁄₄"
																												0	1	0	2	1	59¹⁄₄"	108¹⁄₂"
The following safety rules apply to offset																C. The chimney cannot be more than 30˚												0	0	2	1	1	62¹⁄₄"	113¹⁄₂"
installations (letters correspond with il-																(45˚ in Canada) from the vertical plane in												0	1	3	0	1	64¹⁄₂"	117¹⁄₂"
lustration above):																any installation*.												0	0	1	2	1	68¹⁄₄"	124"
A. Height of the chimney is measured																D. The maximum length of the angled run												0	1	2	1	1	70¹⁄₂"	128"
																												0	0	0	3	1	74¹⁄₄"	134¹⁄₂"
from the hearth to the chimney exit.																of the total chimney system is 20 feet. (G
																plus H cannot exceed 20 feet.)												0	1	1	2	2	78"	140³⁄₄"
						SR/SC36A SR/SC42A										E. A chimney support (Model SKCS8)												0	0	3	1	2	81"	146"
Maximum:							90'0"				90'0"																	0	1	0	3	2	84"	151¹⁄₄"
																is required every 6 feet of angled run of
Minimum:																												0	0	2	2	2	87"	156¹⁄₂"
																chimney. Chimney supports are required
Without Elbows							12' 6"				12' 6"																	0	1	3	1	2	89¹⁄₄"	160¹⁄₄"
																for every 30 feet and 60 feet (SK8 pipe)
With 2 Elbows*							14' 6"				14' 6"																	0	0	1	3	2	93"	166³⁄₄"
																or 20 feet and 40 feet (3-wall pipe) of ver-
With 4 Elbows*							21' 0"				21' 0"																	0	1	2	2	2	95¹⁄₄"	170³⁄₄"
																tical chimney height above the hearth.
B. Do not use more than 4 elbows per																												0	0	0	4	2	99¹⁄₄"	177³⁄₄"
																Determine the offset distance of your
																												0	1	1	3	2	101¹⁄₄"	181³⁄₄"
chimney.
																chimney arrangement from the centerline
																												0	0	3	2	2	104¹⁄₄"	186¹⁄₄"
Attach the straps of the return (top) elbow																of the fireplace to the centerline of the
																												0	1	0	4	2	107¹⁄₄"	191¹⁄₂"
to a structural framing member.																chimney where it is to pass through the
																												0	0	2	3	2	110¹⁄₄"	196³⁄₄"
The offset (first) elbow of any pair does																first ceiling.
																												0	1	3	2	3	114"	203¹⁄₄"
not have straps.																NOTE: This offset distance may not be												0	0	1	4	3	117³⁄₄"	209³⁄₄"
																your full offset distance. See Examples 2												0	1	2	3	3	120"	213¹⁄₂"
																and 3.												0	0	0	5	3	123³⁄₄"	220"
*		In Canada, two (2) SK845 are allowed.
Fig. 6			Chimney system requirements.

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