Convert portable air conditioner to dual hose?

[Bertie78]

My portable air conditioner is an Electrolux 12000 BTU which does a decent job but creates a negative pressure in the room as it needs air to blow across the hot coil and out of the exhaust pipe. I would like to have a go at changing the air intake to another hose that would bring in air directly through the window. I have seen some videos on Youtube where people have used aluminium metal units with spigot plates. My question is how difficult is this to do on an a 90 degree angle as the intake vents are on the back and side? Would it be necessary to bend aluminium sheets and affix them with tape or adhesive or is there another material like foam etc.?

 

[Wayners]

I thought the idea is as the air that sucked in is cooled air ( some of it) then it continues to lower the temperature.
You will be sucking in hot air from outside your way.
It's that a good thing?

Our air conditioning unit in bedroom works fine and blows hot air out through a 110mm soil pipe

 

[aveatry]

I thought the idea is as the air that sucked in is cooled air ( some of it) then it continues to lower the temperature.
You will be sucking in hot air from outside your way.
It's that a good thing?

Our air conditioning unit in bedroom works fine and blows hot air out through a 110mm soil pipe

Me too.

 

[flameport]

Our air conditioning unit in bedroom works fine and blows hot air out through a 110mm soil pipe

Single hose affairs are grossly inefficient, as they cool the air in the room, then use a substantial proportion of that cooled air to remove the heat and shove it outside, while at the same time hot air from outside enters the building elsewhere.

 

[aveatry]

Single hose affairs are grossly inefficient, as they cool the air in the room, then use a substantial proportion of that cooled air to remove the heat and shove it outside, while at the same time hot air from outside enters the building elsewhere.

I have one in the bedroom and I keep the door and windows shut and exhaust through a window that I fit a board to that has the exhaust hole
You can feel the pressure when you get the door to nearly open or nearly shut.

 

[Bertie78]

I thought the idea is as the air that sucked in is cooled air ( some of it) then it continues to lower the temperature.
You will be sucking in hot air from outside your way.
It's that a good thing?

Our air conditioning unit in bedroom works fine and blows hot air out through a 110mm soil pipe

Yes and no. The air that goes through the upper part of a portable air conditioning unit and lowers the room temperature is the air that is blown across the cold part of the coil. As the refrigerant moves through the system it then moves down to the part in the photo where the hot coil is, and this is where the second fan unit pulls air from that air intake and expels it out through the exhaust pipe. The system is inefficient because it is taking some of the cooled air from the room, and using it to cool the coil before blowing it out of the window.

If I could create a dual pipe pipe system then the air that blows across the hot coil would come from outside instead of being taken from inside the room, and would then go out through the existing exhaust pipe that I already have. Hence the negative pressure would be eliminated from the room as the air for the hot coil would be coming from outside.