What is a rooftop hinge kit for exhaust fans?

What is a rooftop hinge kit for exhaust fans?

The Importance of a Rooftop Hinge Kit for Your Restaurant’s Exhaust Fan   If you own a restaurant, then you know how important it is to have a functioning exhaust fan. Not only does the fan help to keep your kitchen air clean and free of fumes, but it also helps to ventilate the space […]

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