It seems the portable units aren't gaining favourable reviews. I'm not
keen on having a large floor standing unit on taking up space.

Having spent 5 years in the Middle East, I'm used to full house ACs -
a luxury I know!.

I'm keen on the split ACs. The wall units are not as obtrsusive and I
have a good place to put the condeser in.

A question about the external condensors - are they supposed to be
screwed into the floor/roof? I'm planning on placing it on a flat roof
so I can't screw it down.

Thanks,

Al.