RV Roof AC Brand:  Dometic Duo Term (Known as Penguin) Model : 630035.321 Freon: R22 For ducted motorhome or trailer. Quantity : 2 units. (One has a heating element the other doesn’t.) Works perfectly. I had it working in my 2005 Monaco Cayman. I installed two new units last year and wanted to keep the old ones, if one of the new ones failed under warranty, I wouldn’t have to wait 6 months for a replacement.  One year later I came to the conclusion that they are taking too much space in my garage, so decided to sell them.  If you have a Monaco they will fit and work perfectly. Price : $350 each or better offer. No shipping, you will have to come and pick them up. Im located in Land O Lakes, Fl 34639.