Also depending on what type of energy recovery device being used you will have varying levels of effectiveness - particularly when addressing latent transfer.
The figures above are pretty optimistic. Depending on your OA and EA flows and type of recovery device you could theoretically reach 90% effectiveness but not without a pretty significant cost. Essentially recovery capability is dictated by surface area.
typically a residentIal or small commercial plate type exchanger would be about 60% effective for sensible transfer, much less for latent (moisture). (Latent transfer only occurs with ERVs, HRVs are sensible transfer only)