If you're looking for a new PTAC unit for your 300-400 Sq. foot space, this 9000 Btu GE unit is the perfect choice.
The GE AZ65H09DAB PTAC needs 208v-230v of power and features Electronic controls with a Heat Pump. The unit uses R-410A refrigerant. You'll need a power cord to install the unit, as well as a sleeve and grille (not included).
This GE unit, which is rated at 12.2 EER, is a great solution for anyone needing a PTAC unit for new construction, or to replace an existing unit.