Oskar the economist now has a big brother! Thanks to its unique V4 filter technology, the powerful humidifier is the ideal choice for large rooms up to 650 square feet. With his 1.5 gallon water tank, Oskar Big is one of the largest in his class. The memo function reminds you to replace the filter and because of the night mode, he works almost unnoticed. With his maximum power consumption of 32, Oskar Big is also a great economist.