Personally i don t see why they.
Wall mounted ac exhaust closed or open.
Newer models will just have a button in place of the damper labeled as exhaust.
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.
However there is better blowing power when the exhaust is closed.
I was living in china and concerned about what the air was doing to my health so i started building diy air purifiers and doing air quality tests in china.
They tried to keep their mixing boxes so they would pull half half.
Usually the idea setting is half open half closed for recirc outside air.
Quiet 3 speed wall mount fan with remote control timer and adjustable tilt in white model cz16wr ec 26 75 26 75.
Christopher powell jul 22 2017 11.
When i was doing those tests i encountered two questions abo.
Grounded three prong power cord.
Step 3 press the control button slide the lever or pull the lever to open the vent.
Closed just recirculates inside air.
Thomas here from smart air.
Open draws in some outside air.
Comfort zone 16 in.
When the exhaust is open the air coming from the ac is cooler than it is when the exhaust is closed.
Locate the open close vent control.
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Set it to closed or you will be bringing in humid air and making the a c work harder.
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This maintains a good balance of new air but also keeps the unit from working too hard.
Pulling on the damper opens the vent while pushing it in closes it.
Depending on the make and model of the ac the control may be a button sliding lever or pull out lever.
Favorite answer if some one has smoked inside the a c room you open the exhaust to let the smoke be exhaust out of the room gradually or to remove any oder smell.