My summers are humid and my winters are dry. Which Boveda formula should I use (B49 or B49HA)?
Use B49 Standard Refill Packs year-round.
In extreme climates or during seasonal humidity changes (below 40% humidity or above 60% humidity), you can use additional B49 Standard packets in your case. (Before using Boveda with your instrument, always put packet(s) in a Boveda Holder.)
B49HA High Absorbency Refill packs are only recommended for year-round high-humidity climates.