Who installed this unit for you? Looks like an unfinished job.

Those ports are drain ports to drain your condensation water when your cooling is on.

The lower port is the primary drain and normally it will be connceted to your plumbing system and the higher port will is the secondary drain in case the primary is clogged. it will be dropped to the drain pan (if there is a drain pan) and then drained to the outside of your house.

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• I believe it was installed by a professional -Hurstian- ♂ (292 bytes) () 02/08/2021 postreply 20:36:30