We had the Cyclone fan and Atmos system installed in our 60’s era detached house. The damp issues we experienced around the windows and external walls appears to have been sorted. The Cyclone fan is incredible and clears the bathroom in minutes, even after log hot showers. Air quality in the house is much better, no more stale smells at all and a gentle sensation of air movement (not drafts). Relative humidity has also dropped from around mid 70’s% to early 60’s%. Highly recommended.