Panasonic split air conditioners do have a variety of features that can be very useful, particularly a built-in low ambient setting, making the unit remarkably quiet. Other features include washable and anti-bacterial air filters, 24 hour mode, R410A refrigerant, and the patented Blue Fin technology. One of the downsides, is that we have yet to find an Energy Star certified model for the North American market. While their air conditioners are relatively efficient, they don’t carry some of the certifications that can help you with tax rebates. This can be important if you’re a contractor or distributor.