Heya,
I just was just wondering if it was only me struggling with high humidity levels. My property (ground floor maisonette) has a running humidity level of 65% on average. I keep the patio doors open and bedroom windows during the day. I also run the dehumidifiers in the evening for a few hours in order to manage it and lower it 55%.
So far, it has been working. I don't have any mould problems.
A whole-house ventilation system, unfortunately, is out of question as I wouldn't have where to place the external unit.
Would love to hear your experience.