Product review (4 stars): Order additional parts if using it as ductless
If you are going to use this product as ductless, you have to contact Golden Vantage and purchase the filters.  It's not clear from the description above or from the instructions in the box that additional parts are needed.  http://www.goldenvantage.net/contact-us/  (Of course we found this out when the contractor was here to install it!)

Additional cost was $29.99 plus shipping (via fedex ground) (Sept 2014)

They were very helpful on the phone and said that the unit can be wall mounted and then I can install the carbon filters easily when they arrive (w/o the contractor).