Metal Chimneys and Vents Flashcards
(12 cards)
B vents are typically used for which fuels?
Natural gas and propane
L vents are typically used for which fuels?
Gas or oil
Class A chimneys are typically used for which fuels?
Oil and some wood-burning appliances
Factory-built chimneys (super chimneys) are typically used for which fuels?
Solid fuels
Any B vent can be installed up the outside of a house.
False
Metal chimneys often have several flues.
False
List 12 common metal chimney vent problems.
- Not labeled for application
- Sections not well secured
- Chimney/vent not well supported
- Inadequate clearance from combustibles
- Inadequate fire stopping
- No cap, wrong cap or obstructed cap
- Warped, buckled or twisted chimney walls
- Rusted or pitting
- Inadequate chimney height
- Creosote buildup
- Excessive offset from vertical
- Not continuous through roof
- Too many appliances on one flue
- Adjacent chimneys of different heights
Sections of metal chimneys are typically welded together on site.
False
Metal chimneys that extend more than 5-6 ft
Should be laterally supported
What clearance is required for metal chimneys of wood fireplaces?
min 2 inches
What part of metal chimneys often rust? (Give the location)
Above the roof line
It is good practice to connect a metal chimney to a masonry chimney part way up a house so that the exterior part of the chimney is masonry.
False
