Easy to install, these units are designed to cool a single room with more cooling power than portable units. Portable units can be moved from room to room, but must be vented through a window. Replace that old AC system or window air conditioner with a quiet and energy efficient .GOODMAN SEER 81 AFUE 80,000 BTU Heating R-410A Multi-Position Package Air Conditioner with Gas. GOODMAN SEER R-410A Horizontal Package Air Conditioner Heat Pump. Kelvinator 2. SEER R-410A Split System Central Air Conditioning System..A window air conditioning unit will generally suffice to keep a smaller home cool on warm spring and summer days. The cost to install a window air conditioner .