This Anypro 3.5L Ultrasonic Cool Mist Humidifier is the #1 best seller in the whole house humidifiers category on Amazon. It's listed for $54.99 but you can get it for $27.49 when you apply the promo code at checkout. Shipping is free on orders of $49 or more. The humidifier has over 1,200 reviews with an average of 4.5 stars out of 5.