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8 Cards in this Set
- Front
- Back
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Minimum height of air supply inlet above grade level |
12 inches |
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Minimum size of an opening in a screen, Louvre or grille |
1/4max |
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Max length of air supply duct without increasing size |
20 feet |
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Minimum size of square or rectangle duct used for air supply |
9 in squared |
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What type of damper is allowed for installation on air supply duct |
Certified automatic damper |
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Where should air supply duct terminate |
Next to burner with largest appliance |
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What is required when mechanical air supply is used |
Mechanical unit must be interlocked with app. It serves |
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An air supply grille installed in a wall bet. a mech room and building must be what height above floor |
Between 6 and 18 inches |
