Items that are currently in-transit to our warehouse, are currently in-stock at a drop-ship vendor’s, or manufacturer's warehouse will be marked as "Available". These products will ship once your order is processed (usually within 24-48 business hours). For any exceptions to this timeframe, an ETA (Estimated Time of Arrival) for your order will be emailed with accurate shipping dates in order to ensure that you are always updated and informed as to when your order will arrive at its final destination.
As per Mitsubishi: There is no additional requirements. Here is a link to a FAQ from Mitsubishi`s website: http://meus1.mylinkdrive.com/files/PAC-US444CN-1_FAQ_2015-05.pdf
If you require more information please contact Mitsubishi directly.
Hope this helps. Thanks for shopping with Appliances Connection and for participating in our online community.