Internally Adjustable Damper

An exhaust system for a commercial kitchen, the exhaust system comprising:

• a first hood having a first plenum, the first hood being sized and shaped to receive a first filter, wherein upon removal of the first filter an interior of the first plenum is accessible;
• a first housing having a first open end in fluid communication with the plenum and an opposing second open end in fluid communication with the first open end;
• and
• a first damper blade disposed within the first housing and rotatable about a first axis of rotation, the first damper blade being securable in a selected rotational orientation to allow the setting of a first resistance to air flow;
• wherein when the first filter is removed from the first plenum, the first damper blade is accessible through the first plenum to allow selectable rotation and securement of the first damper blade.

A method of adjusting the air flow resistance of a commercial kitchen hood, the method comprising:

• removing a first filter from a first hood to expose an interior of a first plenum in the first hood and an inside of a first housing operatively coupled to the first plenum, the first housing having an open first end in fluid communication with the first plenum and an open second end in fluid communication with the first end;
• loosening a fastener disposed within the first housing to release a first damper blade disposed within the first housing, the fastener and the first damper blade being accessible through the first plenum and the open first end;
• and
• rotating the first damper blade about an axis of rotation to adjust a first air flow resistance.