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BxMxK t1_j0tjk9x wrote

Reply to comment by skippingstone in Closing off an AC vent by flyingGoatPenis

Really depends on the unit.

Multi-zone units typically have variable speed motors.

Single zone units usually have single speed motors. Some have blowers mounted directly on the motor shaft. Some are belt driven. With a belt drive you have a little flexibility to swap pulleys to adjust he cfm.

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pLeThOrAx t1_j0tqrog wrote

Do you mean swap the pulleys themselves/change the gear ratio?

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