You don t say what this duct is to or why it would be open in one season or closed in another.
Air conditioner damper open or closed.
Reduce the smoke that enters your home.
Open all the air conditioning vents or registers in the house so they are wide open.
Newer models will just have a button in place of the damper labeled as exhaust.
Each damper device helps regulate air flow within a particular room or zone.
In modern systems the same fan in the furnace is used to move both heated and chilled air so any dampers are only to control the amount of airflow to different zones.
If you cannot stay cool seek shelter elsewhere.
One or more of the vents in the area should be still with minimal to no air flow.
Normally the horizontal position is open angled down about 70 80 degrees is closed.
Also called the damper switch the vent in older windows and wall mounted ac units look like a tiny black knobs in the air inlet grill from where cold air is being blown into the room.
Dampers use a door mechanism that opens to allow more air flow or closes to reduce air flow within a particular zone.
Confirm the damper in question is yielding the result you want by opening it and closing it again just to be sure.
If you have an hvac system with a fresh air intake set the system to recirculate mode or close the outdoor intake damper.
A closed damper think of it like the handle cutting off the flow of air.
It has nothing to do with venting flue gases up a chimney.
Manual dampers are turned by a handle on.
Pulling on the damper opens the vent while pushing it in closes it.
If you have a window air conditioner close the outdoor.
Locate the damper lever on each duct.
Use fans and air conditioning to stay cool.
Each metal lever is located on the side of the duct.
Keep windows and doors closed.
The duct damper is located in an air duct and blocks the flow of warm or cool air into building rooms.
This unit is an automatic opposed blade duct.
An open damper the handle should be pointing down the duct.
Find the air conditioning duct trunks that lead out from the furnace.
Open each damper by moving its lever so it points in the direction the duct travels not across it.