I've been concerned about this lately. I really don't want to have RI's because I didn't drill enough holes in my tubs, but I also want to hold humidity in. How do you know when you have enough air circulation?

I have seen this posted a couple times: "1. Measure the humidity in the tub 2. Take the water dish out 3. Humidity should be the same as the room's humidity within an hour."

Is this true? I have been running tests over the last couple days, and if it's a true test, then I do not have nearly enough holes drilled!

I am leaning towards having more holes and buying a humidifier for humidity. But jeez, I really felt like I had a lot!

If someone has a great test for air circulation, please post it. If you have a general guide for number of holes for a certain size tub, please post it.

As for me, I am concerned with my V-70s and my V-18s.

Thanks!