Drop the temperature to 16? When it gets hot, improve the indoor air circulation with two fan speeds, or dehumidify the indoor air to keep the humidity between 40% and 60%. Portable Air Conditioning, Powerful Air Cooling? Benefiting from the advanced air compressor, the portable air conditioners have a cooling capacity of up to 7,000 BTU, instantly lowering room temperature for rooms up to 215 ft3.