User Manual

Installation
11│Page
Excludeselbowtermination,raincaps,orthe3”PVCConcentricTermination
FordetailsontheventconnectiontotheDirectVentIndoormodels
,
re
f
er toP.14
*Foreachelbowadded,deduct5ft.frommax.ventlength.

‐Exhaustvent(PVCandABSvent)‐

TheDirectVentIndoormodelscanbeconnectedwithPVCorABSventing(temperatureratedupto
149°F).However,themanufacturerrecommendsPVC(orABS)ventingcertifiedtoULCS636standards.
Item Material UnitedStates Canada
Exhaustpipeand
Fittings
Schedule40PVC ANSI/ASTMD1785
ULCS636Certified
MaterialsOnly
PVC‐DWV ANSI/ASTMD2665
Schedule40CPVC ANSI/ASTMF441
Schedule40ABS‐DWV ANSI/ASTMD2661
PipeCement/Primer
PVC ANSI/ASTMD2564
CPVC ANSI/ASTMF493
ABS ANSI/ASTMD2235
NOTE:DoNOTUseCellularFoamCorePipe
 Themaximum lengthofexhaustventpipingmustnotexceed50ft.for4”ventingand25ft.for
3”venting(deducting5ft.foreachelbowusedintheventingsystem).Donotusemorethan5
elbowsfor4”ventingand2elbowsfor3”venting.
 When
thehorizon t alventrunexceeds5ft.,supporttheventrunat3ft.intervalswithoverhead
hangers.

Diameter Max.No.ofElbow Max.VerticalandHorizontal(Total)VentLength
3” 2 25ft.
4” 5 50ft.

No.ofElbows
Max.VerticalorHorizontalLength
3”venting 4”venting
0 25ft. 50ft.
1 20ft. 45ft.
2 15ft. 40ft.
5 N/A 25ft.




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ThisisaCategoryIVapplianceandmustbeventedaccordingly.Theventsystemmustbesealedairtight.
AllseamsandjointswithoutgasketsmustbesealedwithhighheatresistantsiliconesealantorULlisted
aluminumadhesivetapehavingaminimumtemperatureratingof160°F.Forbestresults,a
vent system
shouldbeasshortandstraightaspossible.
 TheDirectVent IndoormodelsareaCategoryIVapplianceandmustbeventedaccordinglywith
any4”ventapproved forusewithCategoryIII/IVorSpecialBHtypegasvent.
 The manufacturer recommends the “T‐Vent”line
manufactured by TAKAGI (Refer to Takagi’s
“T‐Vent”brochurefordetails).However,thefollowingarealsoULlistedmanufacturers:ProTech
SystemsInc.(FasNSeal),Flex‐LInc.,Z‐FlexInc.(Z‐VentIII),Metal‐FabInc.,andHeat‐FabInc.(Saf‐
TVent).
 Followtheventpipemanufacturer’sinstructionswheninstalling
theventpipe.
‐Exhaustvent(Stainlesssteelvent)‐