Hi All,
FWIW, I live on the central East Coast of Florida. Humidity (very high like > 90% RH most summer nights, as low as 60% when it is 90F+) is a killer for my old Bauer PO filter cartridges. To make my filters last a normal amount of time, I run a membrane air dryer to get it to 10% RH, 100 lpm to feed the hpa compressor. I changed out the oil in the shop compressor to breathable synthetic prior to using it for this purpose. BTW, don't use a membrane dryer on air you plan on breathing. Evidently is lowers the oxygen content while drying the air. I'm sure my airguns don't mind running a few points higher on nitrogen.
This site is great for info!,
Nugria