Safety Alert Key:
• DANGER! Indicates a hazardous situation which, if not avoided will result in death or serious injury.
• WARNING! Indicates a hazardous situation which, if not avoided could result in death or serious injury.
• CAUTION! Indicates a hazardous situation which, if not avoided, could result in minor or moderate injury.
• NOTICE: Used to address practices not related to personal injury.
C. Vent Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
D. Pipe Clearances to Combustibles . . . . . . . . . . . . . . . . . . 21
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Heatilator • NBV3630I-B, NBV3933I-B, NBV4236I-B, NBV4842I-B Installation Manual • 2376-980 Rev. F • 7/16
Table of Contents
B. Gas Pressure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
A. Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
= Contains updated information.