THE LOWER THE % SETTING, THE MORE MOISTURE THE DEHUMIDIFIER WILL REMOVE!!!
I have a Provic dehumidifier mainly to remove damp from walls in my 1900s terraced house ( 3rd DPC failed, another on its way). I've read a lot about the technical side and all I wanted to know was 'do i set it on the highest or lowest % to extract moisture from the walls'. I rang the Managing Director at Provic (his contact details are given on their website) who was very helpful. He advised that the lower the setting, the more damp would be removed from the walls and therefore the air, as the water passes from the wall into the air. My DH ranges from 40% to 70% so he advised me to set it at 40% in the worst affected room to remove as much moisture as possible from the walls. As the moisture is removed, the DH will collect less water and set itself to the correct level anyway. He advised me that when as much water as possible has been removed from this room and the DH % will not drop any lower, to move it to a more central position in the house, such as the hallway to then start setting the rest of the house to the correct humidity level. I set the DH to 40% and left it on overnight closing all doors to the affected room and removing containers of water such as a vase of flowers. When I got up in the morning it had switched itself off as it had already collected 3 litres of water! You do have to be careful not to over dry the air as everything, furniture and electricals, naturally needs moisture, but for a short term, quick drying solution, this level is ok.
Hope this helps!
I use 50% to keep books dry.
What determines humidity is outdoors temp - it it's below freezing, inside humidity may be below 50% (less than your dehumidifier can achieve).
Most northern homes need extra humidity (not dehumidified) in the winter as 68 feels much warmer at 60% humidity than 45%
2,635 views
Usually answered in minutes!
×