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21 Cards in this Set
- Front
- Back
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It takes _____cuFt of Air for every cuFt of Natural Gas Burned |
10 |
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It takes _____cuft of Air for every 1 cuFt of Propane Burned |
24 |
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What is the minimum height of a air supply inlet above grade level? |
12 inches (300mm) |
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What is the minimum size ( dimension) of an opening on a screen , louvre or grill used for air supply? |
1/4 inch 6mm |
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What is the maximum developed length of an air supply duct allowed without increasing the size? |
20 feet |
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What is the minimum size area for a square or rectangular duct used for air supply? |
9in2 (58cm2) |
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What type of damper is allowable for installation on air supply duct in a dwelling unit? |
Certified automatic damper |
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Where should an air supply duct terminate? |
Next to the burner of the largest input appliance |
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What is required when a mechanical air supply is used ? |
Must be interlocked |
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Using a NO.600 grille, what size grille is required to provide 69!square inches of free area? |
10”X10” |
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An air supply grille installed in a wall between a mechanical room and the building must be what height above the floor? |
Between 6” and 18” |
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Category I natural draft appliances ( draft good) require _______ than a Category I fan assist appliance |
More |
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Today’s Code requirements state the air required for combustion and flu gas dilution must be ________________ |
Piped in through a dedicated air intake or mechanical duct system . |
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Which table is used for air supply requirements when all appliances have draft hoods? |
8.1 |
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Which table is used when all appliances are Fan assist? |
8.2 |
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Which table is used for a combination of draft hood appliances and fan assist appliances ? |
Both. Draft hood in 8.1 Fan Assist + Draft hood 8.2 Select largest |
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Clause 8.2.6.(a)!states that the air supply opening shall have a free area of not less than _______ for every _______BTU of appliance input. |
1inch sq 1000 |
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Less than ______sq” of leakage is considered tightly constructed |
76 |
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Where a water heater is installed with an input not exceeding _______ and it is the only gas appliance in the room or building, there is no need to _____________. |
50 Supply air from outdoors |
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Combustion air openings should be located between |
6” and 18” from floor level. |
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Where must the supply air duct from outside terminate in the mechanical room? |
Within 1 foot above and 2 feet horizontally of the appliance. |
