How to Identify...

Skylight
Discerning Factors:
Roof-mounted in commercial buildings for overhead natural light, integrated into flat/sloped roofs minimally.
Look for labels on the unit for manufacturer, model and serial number.

Smoke Vent
Discerning Factors:
Roof-mounted in commercial buildings for automatic smoke and heat release during fires, integrated into flat/sloped roofs with minimal protrusion.
Look for labels on the unit for manufacturer, model and serial number.
Look for pull handles or hinges.

Integral Curbs
Discerning Factors:
Integral curbs have limited or no fasteners along perimeter frame.

Curb Mounted
Discerning Factors:
Unit sits on curb with obvious fasteners through frame into curb.

Louver or Vented Base
Discerning Factors:
Typically cannot be reused.