Townhouse: Tom - the Solarventi has worked brilliantly and from my sensors I saw that when the season changed from dry to humid, the humidity of the house raised to 70% and in mid-October when we started the SolarVenti facing the winter, the humidity in the house fell to 60% in a week. I must say it is one of the best investments I have ever made. Tom N., Calahonda, Málaga (Finland)