We have purchased 2 identical products from Meaco- DD8L. We bought one last year to help with condensation and drying our clothes during the Winter, when it is often wet. We have noticed less musty smell and clothes smelling much fresher when dried indoors, also, it has slowed down mould appearance. We bought a second one to use in one of our North- side bedrooms. We only started to use the new one a week ago, so difficult to say,how much it will prevent mould regrowth on bedroom walls. But it is amazing, how much moisture there is in just one room! I like that this DD8L is fairly quiet, low cost and does the job!