Chimney


Mechanical Code

Chimney

A vertical shaft enclosing one or more flues for conveying flue gases to the outside atmosphere.

Factory-Built Chimney

A listed chimney.

Masonry Chimney

A chimney of solid masonry units, bricks, stones, listed masonry units, or reinforced concrete, lined with suitable flue liners.

Metal Chimney

A chimney constructed of metal with a minimum thickness not less than one-hundred and twenty-seven one-hundredths (0.127) inch (3.23 mm) (No. 10 manufacturer’s standard gauge) steel sheet.

Chimney, Residential Appliance-Type

A factory-built or masonry chilnney suitable for removing products of combustion from residential-type appliances producing combustion gases not in excess of 1,000°F (538°C), measured at the appliance flue outlet. Factory-built Type HT chimneys have high-temperature thermal shock resistance.

Chimney, Low Heat Appliance-Type

A factory-built, masonry, or metal chimney suitable for removing the products of combustion from fuel-burning low-heat appliances producing combustion gases not in excess of 1,000°F (538°C) under normal operating conditions, but capable of producing combustion gases of 1,400°F (760°C) during intermittent forced firing for periods up to one hour. All temperatures are measured at the appliance flue outlet.

Chimney, Medium Heat Appliance-Type

A factory-built, masonry, or metal chimney suitable for removing the products of combustion from fuel-burning medium-heat appliances producing combustion gases not in excess of 2,000°F (1,093°C), measured at the appliance flue outlet.

Chimney, High Heat Appliance-Type

A factory-built, masonry, or metal chimney suitable for removing the products of combustion from fuel-burning high-heat appliances producing combustion gases in excess of 2,000°F (1,093°C), measured at the appliance flue outlet.

Chimney Connector

The pipe that connects a fuel-burning appliance to a chimney.

(Uniform Mechanical Code® 205.0)