Product review (2 stars): You should know you are in trouble when they include ...
You should know you are in trouble when they include a plastic vent duct and the instructions tell you not to use it.  The instructions appear to be a translation into English. The filters are missing and Amazon said to contact the company using the phone number in the booklet.  (Amazon is reimbursing me part of the cost for the missing filters.)  There is nothing in the booklet, names or otherwise.  I will keep googling and trying to find replacement filters.