Furnace Flue Pipe Code

All piping must be installed in accordance with local codes and these instructions.

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. There are different types grades of pvc on the market and some of them may not be allowed for use as flue gas exhaust. 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. Metal flue fire clearance requirements single wall metal pipe flues gas fired equipment.

Always check your local state province codes and regulations. And why would you have to care about gas furnace vent pipe code. This limit is not usually reached. Fire clearances required range from 6 to 36 depending on the equipment.

For example here in canada schedule 40 pvc dwv drain pvc may not be used. 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. There will be a point where these factors counter balance the momentum of the flue gases.

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

Pipe gravity and the cooling of the flue gases you can make the pipe too long. Fundamentals of gas appliance venting and ventilation 1985 american gas. 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. 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.

9 is a typical clearance between a gas fired boiler or furnace flue connector and combustibles.