Hydro-Smart 115 - Exhaust Venting Requirements

Installation
13│Page
‐Exhaustventing‐
ThisisaCategoryIII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350°F.Forbestresults,a
ventsystem
shouldbeasshortandstraightaspossible.
 ThiswaterheaterisaCategoryIIIapplianceandmustbeventedaccordinglywithany4”vent
approvedforusewithCategoryIIIorSpecialBHtypegasvent.
 Followtheventpipemanufacturer’sinstructionswheninstallingthe
ventpipe.
 Donotcommonventthisappliancewithanyotherventedappliance(Donotterminatevent
into a chimney.If the vent must go through the chimney, the vent must run all the way
throughthechimneywithCategoryIIIapprovedorSpecialBHventpipe).
 When
the horizontal vent run exceeds 5 ft., support the vent run at 3 ft. intervals with
overheadhangars.
 The maximumlengthofexhaust ventpipingmustnotexceed50ft.(deducting5ft.foreach
elbowusedintheventingsystem).Donotusemorethan5elbows.
Diameter Max.No.ofElbow Max.VerticalandHorizontal(Total)VentLength
4” 5 50ft.
*Foreachelbowadded,deduct5ft.frommax.Ventlength.
No.ofElbows Max.VerticalorHorizontalLength
0 50ft.
1 45ft.
2 40ft.
5 25ft.

‐VentingIllustrations‐
HorizontalInstallationDiagram
VerticalInstallationDiagram
SidewallVent
Terminator
Wall
BackflowPreventer*
VerticalCondensationDrain**
Fordetailsofthe optionalitems,refertotheInstallationmanualforeachOptionalitem.
Roo
f
VerticalCondensation
Drain**
RoofFlashing
RainCap
BackflowPreventer*