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Hunter is a separate ceiling fan company.
Hampton Bay ceiling fans are sold exclusively by Home Depot, it is their own house brand. If you are experiencing problems with a Hampton Bay fan, you will need to contact Home Depot.
Harbor Breeze ceiling fans are sold exclusively by Lowes, it is their own house brand. If you are experiencing problems with a Harbor Breeze fan, you will need to contact Lowes.
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Best of Luck, Brian
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I haven't used Harbor Breeze yet. I have a Hampton Bay in my home and it works great. Hunter, I believe is a step up from both. In the end I would get the one that has the best warranty for the value.