Heatiator BIR42 Indoor Fireplace User Manual


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Table 8.2
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 re.
• 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nd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
Heatilator•BirminghamBIR42•4059-308RevJ•1/11
A B
SL1106 SL1112 SL1118 SL1136 SL1148in. mm in. mm
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 47 1194 - - 2 - -
221/4 565 48 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 73 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.
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tsyourapplicationis
twoSL1112s.
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