I dropped the RH in my humi.....

[stevef2005]

Well I have been keeping mine at 66-70. I will be rethinking it after my run in with mold. I am thinking probably the 62-65 range will be my new target range.....

[Weelok]

Originally Posted by stevef2005

Well I have been keeping mine at 66-70. I will be rethinking it after my run in with mold. I am thinking probably the 62-65 range will be my new target range.....

Mold is bad. I am surprised you got it at that low a RH? I confess I have had a few run ins but usually when I transisition from dry AC Summer to wet Sacramento Fall before heater kicks in and I forget to lower the active humidity sensor point. I have it set around 67% but so many variables in my set up so mostly have to monitor by smoking cigars LOL.

[shilala]

Originally Posted by stevef2005

Well I have been keeping mine at 66-70. I will be rethinking it after my run in with mold. I am thinking probably the 62-65 range will be my new target range.....

If the RH hits 80%, I'll have mold.
That's actual RH, not whatever a hygrometer may be reporting. I have to take into consideration how accurate the hygrometer is, and what it's normal deviation is.
Mind ya, that 80% used to be the old rule of thumb. Now Health Agencies are saying that if the RH stays above 70% indoors for extended periods of time, mold will almost certainly grow.
Notice that this stuff doesn't jive with the 66-70RH you mentioned.
That suggests that your hygrometers are wholly inadequate, way off, or flat out broke.
Lowering your setpoint is an excellent idea, but you may not be going low enough to make up for how screwed up your hygrometer is.
Good Luck, brother!!!