Senecio: I would advise against the high wall heat pump in the hallway. It never works how people expect it to to heat the bedrooms off it. You simply end up with a hot hallway and cold bedrooms.
Totally agree. We tried this and it was a complete waste of money.
interesting, i've only seen one person who says it works really well, and they install them 🙄
in my experience of heating/cooling rooms across the hall way from the heat source was fairly poor. that was with a fan blowing it directly in to.