New York State Wood Stove Pipe Regulations

Types

• Two categories of stove pipes meet New York state requirements for connecting a wood stove to a chimney. Single wall stove pipe comes in a variety of lengths and consist of 24 and 26 gauge steel. When using single-wall pipe, the codes require a minimum 18-inch clearance of the stove from combustible materials. Double-wall stove pipe has a stainless steel inner wall and a black outer wall and allows for a minimum 6 inches of clearance. The space located between the two pipes act as an insulator.

Stove Pipe Run

• When installing stove pipe, the building codes prohibit the use of two or more elbows in the pipe run. The length of the run should be as straight and as short as possible, but taking into account the clearance requirements. Every 12 inches of pipe requires a ¼-inch rise. The maximum allowable length for a stove pipe run is three-quarters of the chimney's height.

Stove Pipe Joints

• The rules state that the stove pipe joints must have an overlap of 2 inches. The crimped (male) end of the pipe must point down because it helps to prevent leaks. The installer must use a minimum of three sheet metal screws to secured connections.

Connection to Chimney

• The stove pipe connects the wood stove to a masonry or metal prefabricated chimney. Building codes prohibits passing connector pipes through walls, ceilings or roofs. In addition, the regulations do not allow the use of stove pipe on the exterior. A certified chimney inspector should examine the chimney and flue liner to verify their condition. Venting wood stoves to a masonry chimney requires connecting the stove pipe to a flue liner of equal size.

  The other venting option connects the stove pipe to a UL approved Stainless Steel Class "A" Insulated Chimney. Usually, a stove pipe adapter and a wall pass-through shield (thimble)is used in walls where the stove pipe connect to the chimney. Installers use a support box for ceiling connections.