Ambient humidity vs. RH

[CC Solutions]

Well here it's not always that way. If a manufacturer says he will warrant a product if you do X, Y and Z and there's no standard or the standard differs, you probably want to go with the manufacturer so you retain the warranty.

Then there are the installers who kind of do their own thing and don't follow the standards either because they are ignorant of the particulars or they just don't care. In those cases, I hope you follow the standards because when the job blows up it will show at least you used common sense and followed proven methods.