Heating Helper

CHAPTER 9 - VENTING FLUE PRODUCTSA. Acceptable Venting MaterialType Temperature ApplicationAL29-4C ®(Proprietary stainlessgas equipment steel pipe)Single-wall Metal Pipe00°F to 480°FRefer to codes andto manufacturer’srecommendationsPressure ventedgas equipmentAluminum, galvanizedsteel or stainlesssteel; depending onthe application (1)B and BW Vent to 550°F Gas equipmentL Vent to 1000°F Oil equipment (1)Factory-built ChimneyOil or gas-fired.500°F to 2,200°Fequipment (1)Masonry Chimney(title liner & air space)360°F to 1,800°FGas or oil equipment(metal liner .may be required) (2)(1) Stainless-steel vents can resist the heat that is associated with oil-fired ventgases, but when the inner wall temperature is below 250°F, it loses its abilityto resist acidic damage.(2) Masonry chimneys also are susceptible to acidic damage.B. Metal VentsType. .Description“B”Double-wall round gas vent pipe with a relatively. . . low permissible temperature of vent gases.“BW”Double-wall oval gas vent pipe designed to fit. . . within a conventional stud wall. .Same application as Type “B”..“L” Double-wall round stainless steel insulated. .Type “L” is rated for higher temperature vent gasthan the Type “B”. Type “L” may be usedin lieu of“B” but not vice versa.“C”Single-wall galvanizedIMPORTANT:Venting guide for all Burnham RESIDENTIAL gasboilers -- See page 12479