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.
Note: The term "recommend" or "recommended" does not indicate a requirement. It is a best practice suggested by Hearth
& Home Technologies
. Failure to perform the recommended task will not result in a safety concern.
®
Table of Contents
A. Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
B. Service Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
= Contains updated information.
3
Heatilator • NDV3630I-B, NDV3933I-B, NDV4236I-B, NDV4236I-NVR, NDV4842I-B Owner's Manual • 2382-981 Rev. N • 5/22