When a large room needs more humidity with the least possible energy consumption, Oskar Big is equipped for the job. This quiet, evaporative humidifier will effectively raise the humidity level to comfortable range in a space up to 650 square feet. We appreciate the four fan speeds which accommodate both for spacial requirements as well fan noise management. Much like the original Oskar, the Oskar Big has a distinctly European, minimalist design that looks right at home in almost any environment. Perhaps most importantly, it doesn't scream 'Look at me, I'm a humidifier!' In our experience, the four filter wicks generally will last up to 3 months of usage. Ultimately, if your environment is large and needs a boost in humidity, the Oskar Big is a good investment for your health and home.