Natural, manufactured and liquefied petroleum, or a mixture of these, make up:
Given: The listed clearance is 12 inches.

What would be the reduced clearance to combustibles, in inches, if the millboard is replaced with 24-gauge sheet metal?
What is the minimum air velocity that must be provided by an exhaust duct system serving a Type I range hood?
The optional integral clearance reduction system is designed to meet which NFPA standard?


Exhibit:

CEF-5 is a ceiling exhaust fan manufactured by: