You can try plugging it in and see how much moisture it pulls from the packs. 1 large pack is designed for 25 sticks. I go 20 sticks to 1 pack and add some gel black ice pies to over humidify and force the boveda to pull the extra rH. Put your hygrometer and a couple packs, plug it in, and see what happens. If it holds for a week, use it. Heck it may work just fine. Still plug the drain hole.