Nortek GHH09(2.6)LUK4DH Owner's Manual page 4

Explanation of Symbols
DANGER
WARNING
CAUTION
NOTICE
Failure to comply will result in severe personal injury,
property damage and/or death.
Failure to comply may result in severe personal injury,
property damage and/or death.
Failure to comply may result in personal injury and/or
property damage.
Indicates important but not hazard-related information,
used to indicate risk of property damage.