help with this vent connector

This vent connector is installed with a mid efficiency furnace (1992) and is venting to an exterior sidewall.

3" PLEXCC PLEXVENT R286K 902474 101 02 08 17 92

My thoughts are it should be high efficieny to vent in this manner. Your thoughts/recommendations are appreciated, as always :slight_smile:

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Plexvent was subject to recall for cracking issues.

Thank you very much :slight_smile: