We live in a 3 story house, the top floor is always hot in the summer. We have central air con, but there was a significant difference between the top floor temp and the main floor. We were also concerned about unsightly and intrusive air con units, and noise. Kev suggested a ceiling cassette. He and his team mounted it through the attic, and the unit is flush with the ceiling. What a difference it made in temperature! It is also whisper quiet. The top floor is the now the same temp as the bottom floor, and the unit is powerful enough to cool a portion of the middle floor as well. Great suggestion, and amazing install. We are super happy with the job.