We just had a Daikin mini-split system installed in our sun room. Before it was really hot from direct sun and the 12000 BTU portable AC unit didn't really stand a chance, it just could not overcome the heat gain. We wore on out in 3 years and we decided to purchase the Daikin. Wow what a difference! Now it is almost too cold depending on hot it is outside. It even keeps my main Lennox unit from having to work so hard. The sales and tech team is unsurpassed in our opinion. They are friendly, professional and always on time or early. We wouldn't anyone else for our heating and cooling needs. THE BEST!