If you're looking for a reconditioned PTAC unit for your 300-400 Sq. foot space, this 9000 Btu Amana unit is the perfect choice.
The PTAC needs 265v-277v and 20a of power and features Electronic controls with Resistive Electric Heat. It includes a power cord with a NEMA 7-20 plug. This unit uses R-410A refrigerant. You'll need a NEMA 7-20 receptacle to install the unit, as well as a sleeve and grille (not included).
This Amana unit is a great solution for anyone needing a PTAC unit for new construction, or to replace an existing unit.
This reconditioned unit comes with a limited warranty from PTACUnits.com.