We switched out our 12 year old Carrier with a Mitsubishi unit. The Mitsubishi was an inverter, and the one suggested by the previous AC company was not. It was about the same price, and having done a little research on the differences, I chose the inverter. We used M+S Air conditioning, and they have been outstanding. Our usage is down about 10-15% from the old unit (unfortunately not the bill). One big deciding factor for us was the 12 year warranty vs the 10 year.
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"I ain't as good as I once was,
But I'm as good once as I ever was!" Toby Keith
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