13• The first vertical run from the top of the heatershould be no longer than 0.9m (3').• Make sure vent pipe is gas tight and will notleak. Use silicon sealant wherever necessary.• Do not common vent or connect more thanone appliance to this venting system.• The total vent length including horizontal & verti-cal vent runs should be no less than 0.9m (3').• Do not place any dangerous objects at the endof the exhaust vent and check that vent pipe isnot blocked in any way.• Steam (smoke) or water drops may come outfrom the end of the exhaust pipe. Select thelocation for the end of the vent so that steam isnot visible, and the vent is not wet with drip-ping water.• If snow is expected to accumulate, take carethe end of the pipe is not covered with snow orhit by falling lumps of snow.• Consult the vent pipe manufacturer's install-ation instructions for chimney connections.Appliance Adapters• Use the following adapters to connect theunit to the venting system.Vent Piping• Use only UL listed category III vent materials.• Follow the vent pipe manufacturer's installationinstructions.• Make the vertical section of the exhaust ventas short as possible.• Maintain the same vent pipe diameter from theheater flue to the vent termination.Pipe diameter 100mm (4")No. of Elbows Max. Straight Vent Length3 4.6m (15')2 8.2m (27')1 12.0m (39')ClearancesThese clearances are subject to change.Refer to the UL listing for the proper clearances.Manufacturer andProductProtech FasNSeal FSAA4HeatFab SafTVent 9401RYPKZ-Flex Z-Vent 2SVWA04Flex-L Star-34 SRASPSA4Part No.WARNINGBe sure to doCARBON MONOXIDE POISONINGFollow all vent system requirements in accordance with relevant local or state regulation,or, in the absence of local or state code, in the U.S. to the National Fuel Gas Code ANSIZ233.1/NFPA 54 – latest edition, and in Canada, in accordance with NSCNGPI.[ For N-0751M]Manufacturer and Enclosed UnenclosedProduct Hor. Vert. Hor. Vert.Noritz N-VentProtech FasNSealProtech FasNSeal W2HeatFab SafTVentZ-Flex Z-VentFlex-L-StaR-34100mm(4")100mm(4")100mm(4")100mm(4")100mm(4")25mm(1")25mm(1")75mm(3")75mm(3")75mm(3")75mm(3")50mm(2") 50mm(2")25mm(1") 25mm(1")25mm(1") 25mm(1")150mm(6")150mm(6")150mm(6")200mm(8")200mm(8")250mm (10") (sides)375mm (15") (top)150mm (6") (bottom)200mm (8") (sides)300mm (12") (top)100mm (4") (bottom)8. Vent Pipe Installation (Indoor Installation Only)