What accurate humidity level in full basement stops all mold ?

[cyclops222]

New dehumidifier is doing great !! Down to 39 %. What is a good number to set it to ? Walls and floor are always dry. Until severe several days of rain.

Thanks

 

[alldodge]

If it stays below 50% mold won't grow

 

[cyclops222]

Many thanks. I will set it to 45 % to cover any slight errors.

 

[dingbat]

Depends on your "normal" humidity levels....
Don't go too low or your wood floors and furniture will suffer the consequences.
I set my humidifier to 50% in the winter and still see some separation in the furniture and floors. Then again, normal humidify for us in the summer is 80-100%

 

[crazy charlie]

I usually do 45 % .Recently added a box fan on low speed and that seems to be helping a great deal.Collecting less water at 45% now

 

[Lou C]

I use 50% here in Long Island NY we are a pretty damp climate here. That stops mold growth for the most part….

 

[jimmbo]

I keep mine at 30-35% yr round, and I would go lower if I could

 

[briangcc]

Mine's my furnace. It'll dry anything out...including my 110 gallon pond I keep in the basement over winter time. Can lose 1-2" of water in a week. Which reminds me...probably time to refill it. My koi and Shubunkin will be happy when I do.

I run a dehumidifier only during the summer, whatever the stock setting was out of the box. Seems to do fine.

 

[flashback]

mold thrives at 70% or higher, 45% should be good.