Cool air falls toward the floor. Deflectors shouldn't be necessary unless the vent is behind a curtain or something, or if you want to deflect the cool air toward your easy chair.
Yes. You need to open the plumb, & you have an air vent there.
like deflectors on lorries
To properly vent a portable air conditioner, you need to use the included exhaust hose to vent hot air outside through a window or a vent. This helps the air conditioner work efficiently and keeps your room cool.
No. You vent air from a sewer line.
To vent a portable air conditioner without a window, you can use a drop ceiling, a wall vent, or a dryer vent. Make sure to follow the manufacturer's instructions and use proper ventilation materials to avoid any safety hazards.
some lorries have deflectors fitted over their cabs, so it becomes more streamline, it can DEFLECT the air resistance too :) The Ugly Rat
Deflectors should typically be facing down when the heat is on to direct warm air flow towards the floor area, helping to distribute heat more evenly in the room.
To reduce the air resistance/drag acting against them and also to reduce the fuel consumption.
An air admittance vent is a mechanical sewer vent which allows air to enter into the sewage system but does not allow exhaust of sewer gases.
You can install a vent fan to push the air to an exterior wall. Another option is to use a ventless dryer that does not require an external vent.
read your owners manual. i had to also. there is only two vent settings that will not use the compressor. the vent setting with the upper and lower vent showing will use the compressor.