7. Combustion air supply.

Question 1

2. Appliance that are constructed and installed so that all air for combustion is derived from the outside atmosphere and all flue gases are discharged directly to the outside atmosphere usually by a flue pipe inside the combustion air pipe?

Answer 1

Direct-vent appliances.

Question 2

3. An appliance equipped with an integral mechanical means to either draw or force products of combustion through the combustion chamber and/or heat exchanger?

Answer 2

Fan-assisted appliances.

Question 3

4. Buildings that do not meet the standards for “unusually tight construction”?

Answer 3

Ordinary tightness.

Question 4

1. A room or space that does not have at least 12 times the volume of a furnace or other air handling device or 16 times the volume of a boiler. When the ceiling is greater than 8 feet the volume is calculated based on an 8 feet height?

Answer 4

Alcove.

Question 5

5. Other name for forced draft?

Answer 5

Power vent.

Question 6

6. A room having at least 12 times the volume of a furnace or other air handling device, or 16 times the volume of a boiler. When the ceiling is greater than 8 feet the volume is calculated based on an 8 feet height?

Answer 6

Room large in comparison to size of equipment.

Question 7

7. A room or space having at least 50 cu. ft. for each 1,000 Btu of the fuel burning appliance contained in the room or space?

Answer 7

Unconfined space.

Question 8

8. Construction with walls and ceilings having a vapor retarder of 1 perm or less with sealed or gasketed openings, weather-stripping on openable windows and doors, and caulking or sealant at joints. This buildings are required by many energy codes and have an average air infiltration rate

Answer 8

Unusually tight construction.

Question 9

9. A room or space having a volume less than 50 cu. ft. for each 1,000 Btu input rating of all fuel-burning appliances in the room or space?

Answer 9

Confined space.