Chapter E - Explain Operation of a Venting System Flashcards
What are the components of a venting system?
Support, fire stop spacer, roof flashing, storm collar, vent cap or vent top, and vent pipe.
What is the purpose of a venting system?
To remove flue gas to the outside atmosphere, to prevent damage from condensation, to protect the building structure from fire hazard, and to provide air circulation.
What are two types of drafts?
Natural draft, and mechanical draft.
What’s another name for a natural draft vent?
A gravity vent.
What’s another name for mechanical draft venting?
Power venting.
What are two types of draft control equipment?
Draft hoods (draft diverters), and barometric dampers.
What is the minimum clearance of a Type A vent?
1 inch.
What is the maximum temperature rating of a Type A vent?
2100 F.
What are type A vents used to vent?
Oil or solid fuel appliances, or gas appliances that have flue temperatures that exceed 470 F (243 C).
What must be added to a Type A vent when converted to a gas fired appliance that doesn’t have high flue temperatures?
A chimney liner.
When are Type BH vents used?
Only with high efficiency appliances that produce low flue temperatures and positive vent pressures.
When are Type L vents used?
Mostly just in accordance with manufacturers specifications due to cost.
What type of vent is approved for recessed wall heaters where the oval shape can be installed inside a 2 x 4 stud wall?
Type BW vents.
What type of vent is only approved to handle low temp. gases from gas appliances?
Type B vents.
Type C vents may not:
Type C vents may not penetrate any floors, ceilings, or concealed areas of the building structure.
