6. Flue systems.

Question 1

2. A nonadjustable device integral to an appliance or made part of the connector that provides for the ready escape of flue gases from the appliance in the event of insufficient draft, backdraft, or stoppage. It (typical on water heaters) prevents backdraft from entering the appliance and neutralizes the stack effect on the operation of the appliance?

Answer 1

Draft diverter or draft hood.

Question 2

3. primarily vertical structure containing one or more flues, for the purpose of carrying gaseous products of combustion and air from an applieace to the outside atmosphere?

Answer 2

Chimney.

Question 3

4. Air that combines with flue gases at the draft hood of an appliance?

Answer 3

Dilution air.

Question 4

5. Air required for complete combustion of a fuel, including theoretical air and excess air. This may be interpreted to include dilution air, which is air introduced into the draft hood and is mixed with flue gases, and ventilation air, which cools appliances?

Answer 4

Combustion air.

Question 5

6. Building materials installed to resist the free passage of flame to other areas through concealed space of the building?

Answer 5

Fireblock.

Question 6

7. Materials installed to resist free passage of flame through an assembly, typically around a duct, vent, or chimney passing through a ceiling assembly?

Answer 6

Firestop.

Question 7

8. The outlet of an appliance designed for the attachment of a draft hood, vet connector, or venting system?

Answer 7

Flue collar.

Question 8

9. A vent system using a fan or other mechanical means to expel flue gases under positive static vent pressure?

Answer 8

Forced draft.

Question 9

10. A device that connects an appliance to a chimney, flue, or vent?

Answer 9

Vent connector.

Question 10

11. A pipe or other conduit composed of factory made components, with a passageway for conveying combustion products and air to the atmosphere, listed and labeled for use with a specific type or class of appliance?

Answer 10

Vent.

Question 11

12. Vented gas appliance categories?

Answer 11

1. Category 1.
2. Category 2.
3. Category 3.
4. Category 4 appliance.

Question 12

13. Use of B vents?

Answer 12

They are listed and labeled for use with appliances with draft hood and other Category 1 appliances listed for use with B vents.

Question 13

14. Use of BW vents?

Answer 13

They are listed and labeled for use with wall furnaces.

Question 14

15. Use of L type vents?

Answer 14

They are rated for use with oil-burning appliances and may be used for gas appliances that require type B vents.

Question 15

15. An appliance with nonpositive vent static pressure and with a gas vent temperature that avoids excessive condensate production in the vent?

Answer 15

Vented gas appliance category 1.

Question 16

16. An appliance with nonpositive vent static pressure and a vent gas temperature that is capable of causing excessive condensate production in the vent?

Answer 16

Vented gas appliance category 2.

Question 17

17. An appliance with a positive vent static pressure and with a vent gas temperature that avoids excessive condensate production in the vent?

Answer 17

Vented gas appliance category 3.

Question 18

18. An appliance with a positive vent static pressure and a vent gas temperature capable of causing excessive condensate production in the vent?

Answer 18

Vented gas category 4.

Question 19

1. A partial enclosure for aesthetic purposes that is installed at the termination of a venting system that surrounds or conceals the chimney or vent cap?

Answer 19

Decorative shroud.

Question 20

19. A portion of the vent system using a fan or other mechanical means to cause the removal of gases under non-positive static vent pressure?

Answer 20

Induced draft.

Question 21

20. A burner that depends upon a draft that is induced by a fan that is integral to the appliance and is downstream from the burner?

Answer 21

induced draft burner.