Actually, Maybe an ERV would be more appropriate than an HRV because my understanding is that an ERV handles humidity as well as air and temperature exchanges. It seems like the situation AC is working with is a humid house.
Actually I'm a little confused about this. ERV's are usually used in humid climates but this isn't strictly the case in Portland, OR. Maybe someone else knows more about this, such as whether ERV's handle humidity in just one direction or both directions. If they can handle it in both directions depending on the direction of vapor drive, then an ERV seem more appropriate for AC's house, rather than an HRV.
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