Follow-Up: Storing Currency

I am very happy with the 3-pocket polyester currency pages and I was thinking of storing the albums of these pages (polypropylene non-PVC three-ring binders) in a polypropylene box with some indicating silica gel (the orange kind not the cobalt containing).

But... I wonder about air circulation. Is it OK to close up these boxes while stored or do I need some air circulation?

My concern comes from a person who wrote to me with what seems very logical: "Air circulation is always preferable. Keeping documents enclosed only promotes deterioration through the ubiquitous evolution of sulfur compounds from any enclosed paper products containing lignin."

But,naturally the question arise... if I have to have air circulation then how do I keep my banknotes in a nice closed box with dehumidifying silica gel?
-I could dehumidify the whole room (overkill) but I'd rather a localized solution such as a box.
-Perhaps I can just open the box every week or so to air it out?

Also if the banknotes are in pages aren't they really already in a micro-environment where it is an enclosed space and the sulfur that would arise would be trapped in that page's pocket?

Calling on all experts! (especially living in new England) how do you handle the humid summer for your banknotes?

(Funny thing is I always worry about this yet I look at my stamps that have been in Lighthouse Vario pages for 10+ years just in the closet with no humidity control and they seem unchanged and just as fresh as the day I put them in there :)