Rheem H95 Direct Vent Indoor Series Use and Care Manual - Page 44

Vertical Vent Terminal Location

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Venting INSTALLATION INSTRUCTIONS VentingforDirect-VentWaterHeater(cont.) Vertical Vent Terminal Location Optional 12" Min. (300 mm) A, B Vent Pipe Through Roof The followingchartwithdiagramsdetailstheminimumdimensionalinformationneededtodeterminetheproper locationoftheverticalventterminalfordirect-ventindoortanklesswaterheaters: Location U.S.Installation Requirements1 A=Minimumclearanceabovetheroof level. 12in.(30.5cm)aboverooflevel. B=Maximumclearanceaboveroof level(withoutadditionalsupportfor 24in.(61cm)aboverooflevel. ventpipe). C=Requiredventclearancefromany gable,dormer,orotherroofstructurewithbuildinginterioraccess (i.e.,vent,window). 4ft.(1.2m) D=Requiredventclearancefromany forcedairinlet,includingdryerand 10ft.(3m) furnaceairinlets. E=Minimum/maximumhorizontaldistancebetweenventterminals 5.5in.(14cm)/24in.(61cm) CanadianInstallation Requirements2 18in.(45.7cm)aboverooflevel. 24in.(61cm)aboverooflevel. 4ft.(1.2m) 6ft.(1.8m) 5.5in.(14cm)/24in.(61cm) 1 InaccordancewithcurrentANSIZ223.1/NFPA54NationalFuelGasCode. 2InaccordancewithcurrentCAN/CSAB149.1InstallationCodes. The verticalintakeairterminationrequiresareturn bend ortwoshortorlongsweepradius90°elbows tokeeptheinletdownwardandprevententryof rain.Refertofigureabovefortheproperlocation oftheairintakewithrespecttotheexhaustoutlet termination.Theverticalexhaustoutlettermination isa2-inchor3-inchpipewhichterminatesatleast12 inches(30.5cm)abovetheairintaketermination.The exhaustoutletterminationsmustbeatleast18inches (45.7cm)(12inches(30.5cm)inUS)abovetheroofline oranticipatedsnowlevels. 44

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44
Venting
INSTALLATION INSTRUCTIONS
Vertical Vent Terminal Location
A, B
12" Min.
(300 mm)
Vent Pipe
Through Roof
Optional
The following±chart±with±diagrams±details±the±minimum±dimensional±information±needed±to±determine±the±proper±
location±of±the±vertical±vent±terminal±for±direct-vent±indoor±tankless±water±heaters:
Location
U.S.±Installation±±
Requirements
1
Canadian±Installation±±
Requirements
2
A±=±±Minimum±clearance±above±the±roof±
level.
12±in.±(30.5±cm)±above±roof±level.
18±in.±(45.7±cm)±above±roof±level.
B±=±±Maximum±clearance±above±roof±
level±(without±additional±support±for±
vent±pipe).
24±in.±(61±cm)±above±roof±level.
24±in.±(61±cm)±above±roof±level.
C±=±±Required±vent±clearance±from±any±
gable,±±dormer,±or±other±roof±struc-
ture±with±building±±interior±access±
(i.e.,±vent,±window).
4±ft.±(1.2±m)
4±ft.±(1.2±m)
D±=±±Required±vent±clearance±from±any±
forced±air±inlet,±including±dryer±and±
furnace±air±inlets.
10±ft.±(3±m)
6±ft.±(1.8±m)
E±=±Minimum/maximum±horizontal±dis-
tance±±between±vent±terminals
5.5±in.±(14±cm)/24±in.±(61±cm)
5.5±in.±(14±cm)/24±in.±(61±cm)
1 In±accordance±with±current±ANSI±Z223.1/NFPA±54±National±Fuel±Gas±Code.
2±In±accordance±with±current±CAN/CSA±B149.1±Installation±Codes.
The vertical±intake±air±termination±requires±a±return±
bend or±two±short±or±long±sweep±radius±90°±elbows±
to±keep±the±inlet±downward±and±prevent±entry±of±
rain.±Refer±to±figure±above±for±the±proper±location±
of±the±air±intake±with±respect±to±the±exhaust±outlet±
termination.±The±vertical±exhaust±outlet±termination±
is±a±2-inch±or±3-inch±pipe±which±terminates±at±least±12±
inches±(30.5cm)±above±the±air±intake±termination.±The±
exhaust±outlet±terminations±must±be±at±least±18±inches±
(45.7cm)±(12±inches±(30.5cm)±in±US)±above±the±roof±line±
or±anticipated±snow±levels.±
Venting±for±Direct-Vent±Water±Heater±(cont.)