I sent one of the units to my sister, who is disabled and in desperate need of an AC. The unit did not do a thing to help her. I was very upset as I realized I was sent Desktop units and not the AC units! I want a full refund! I paid $213.94 for the three units and $40.50 for a Life Time warranty, which I want a refund of this also. 530 Chec621-**** User's recommendation: Check out other options before you buy.