ahhh that is the million dollar question no one has answered yet. If you look on the website it gives seer rating in different high humid parts of the country. not yet if that is speculation based off pure math or they actually install unit some place to test them out. i have sent numerous email to IR and company with no response to my questions I called and talked to MATT two times asking questions he said he would get answers and well now two or three weeks later not answer