If you want to close a vent to an unused room to save energy costs but the vent won t close tightly you have some options to fix the problem.
Circular ceiling vent open close.
Outside diameter of the opening 4 11 16.
If it is a rectangular vent a switch is located on either the right or left side of it.
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Fits 4 3 4 hole.
If it is a square or round vent a dial is located in the center.
Turn it to the left to close the vent.
Vents or registers are the places where the air exits or enters the duct work through a wall floor or ceiling.
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Inside diameter of the opening 3 7 8.
On some diffusers you may have to adjust individual blades manually.
Opening or closing your vents follows a simple procedure of adjusting a switch or turning a dial on the vent s face panel.
Opens closes and rotates for the ultimate in comfort control.
Locate the dial or switch on the vent.
1 place the stepladder under the ceiling vent you want to open or close.
Turn the dial on the square or round vent to the right to open the vent.
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12 4 4 out of 5 stars 83.
How to open close ceiling air vents by michelle varsallona.