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. Approved Pipe . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
D. Use of Elbows . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
F. Vent Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
A. Top Vent . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
B. Rear Vent . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
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Heatilator • NNXT4236IF-B, NNXT4236ILF-B, NNXT3933IF-B, NNXT3933ILF-B Installation Manual • 2384-980 Rev. J • 6/17
Table of Contents
G. HHT Shrouds . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
B. Gas Pressure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
F. Install Logs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
C. Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67
= Contains updated information.