Walmart offers the Gree 115-volt Portable Air Conditioner for $249 with free shipping. That's the lowest price we could find by $89. Features include: 8,000 BTU output for cooling rooms up to 350 square feet. integrated evaporative dehumidifier with a 88-pint capacity 3-speed fan sleep mode that automatically adjusts set temperature at night programmable digital thermostat washable and reusable air filter