Furnace Flue Pipe Code

Intake and exhaust pipes pvc allowed 140 f limit furnace water heater boiler manual size of pipe and allowable lengths support terminations through wall or through roof 12 above grade or anticipated snow level in same pressure location concentric venting kit 25.

Furnace flue pipe code.

Masonry flue or shared flue venting. Fundamentals of gas appliance venting and ventilation 1985 american gas. And why would you have to care about gas furnace vent pipe code. Well the flue which is a term referring to the vent pipe is basically the important component from the furnace that will transport the emission from the combustion heating process to the outside area of the house.

There will be a point where these factors counter balance the momentum of the flue gases. 9 is a typical clearance between a gas fired boiler or furnace flue connector and combustibles. There are different types grades of pvc on the market and some of them may not be allowed for use as flue gas exhaust. The length diameter and number of elbows of the vent flue pipe and combustion air pipe when applicable affects the performance of the furnace and must be carefully sized.

For example here in canada schedule 40 pvc dwv drain pvc may not be used. Metal flue fire clearance requirements single wall metal pipe flues gas fired equipment. Fire clearances required range from 6 to 36 depending on the equipment. Single wall metal pipe shall terminate at least 5 feet 1524 mm in vertical height above the highest connected equipment draft hood outlet or flue collar.

All piping must be installed in accordance with local codes and these instructions. Nfpa 211 reduces fire hazards by ensuring the safe removal of flue gases the proper installation of solid fuel burning appliances and the correct construction and installation of chimneys fireplaces and venting systems. Where the system is routed to the outdoors through an existing masonry chimney containing flue products from another gas appliance or where required by local codes then 3 venting of type 29 4c stainless steel must be used in place of pvc material. Always check your local state province codes and regulations.

This limit is not usually reached. Vent system capacity the volume of flue gases produced by a furnace directly depends on the btuh input of the furnace. See also condensing boilers furnaces. 8 national fuel gas code z223 1 16 00 and national fuel gas code handbook z223 2 47 00 american gas association a g a 1515 wilson boulevard arlington va 22209 also available from national fire protection association batterymarch park quincy ma 02269.

Only fgv flue gas vent pvc certified to a specific standard ulc s636 may be used.