I guess the previous rating was not high enough to be used. Poor instructions, Poor attention to details. Stainless duct easy to kink. Not for DIY unless you are very skilled. My installer was very upset with very poor instructions. Unit was up and down several times before installed. Looks ok, could look very nice. My yes on recommendation is very marginal. Knowing what a hassle it was I would not have purchased it. I certainly would not pay a higher price for it and won't consider any of the higher price units.