I have an older model DeVilbiss. It's noisy, but it works well and I find that it's effective.
To get droplets of EIS (colloidal silver) into the air, I also have an aromatherapy unit. I use this at night because it's freestanding and much quieter. I also got a humidifier from Walgreen's. I removed the wick, which would trap the silver, and the unit does a good job of humidifying the air. Nenah Nenah Sylver, PhD author, The Rife Handbook of Frequency Therapy and Holistic Health: an integrated approach for cancer and other diseases NEW 5th Edition <http://www.nenahsylver.com/> www.nenahsylver.com NEW! See my EarthRiches Etsy shop: https://www.etsy.com/shop/EarthRiches Beautiful, handmade, one-of-a-kind items from semiprecious stones for healing and enrichment