Can I air condition two rooms using an airconditioner in only one room ?
I have just used your Calculator to work out the size of a split system to go in my newly converted double garage.
It has been split down the middle with an internal wall and is now basically a TV ROOM and a BEDROOM, joined by a doorway in the middle.
I know it is not technically right, but what I want to do is mount the system in the TV Room opposite the Bedroom so cool air can be directed in there when required (2 birds with 1 stone I suppose) and work mainly for the TV room but also for the bedroom. (Mainly at night), (I don’t think my budget or the time/practical use of the rooms warrants 2 separate units?)
Although what you propose, is not ideal, it can work acceptably, provided you realise that one room will always be slightly hot and the other slightly cold. You will need to locate the air conditioner as close to opposite the door as possible. Because of the temperature difference I strongly recommend that the unit be located in the TV room as you propose, as the temperature difference will be less at night and conditions should be acceptable at night in the bedroom.
You may need to experiment with vane settings, but provided you get a brand name unit it should have the flexibility to do what you want. I recommend you size the air conditioner as if it was a single large room. I think if you pay attention to the above factors, you will be OK.
To summarise, it is not the ideal solution, but provided you accept that fact, you may be be happy with it.