My brother who is in the A/C business up north says that Carrier and Bryant are essentially the same with a different name plate, same with Trane and American Standard. He says the technology changes so quickly that an older unit is difficult and/or expensive to repair regardless of how long the unit is supposed to last. Also, variable speed units save money when they operate but they are more expensive to repair. I went with Farrell because of their reputation and lower cost.
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