A few ERVs offer a “free cooling” feature for cool nights by bypassing the ERV core. I am wondering as to how far this feature is useful. For example, where I live in East Central Illinois, it was 63F with 75%RH early this morning.
1. I understand the RH will drop initially since the indoor temperature is higher, but with continued free cooling, wouldn’t the indoor temp and humidity come close to 65F and 75RH?
2. If this is the case, is it not going to feel cold and clammy, requiring a stand-alone dehu to run and dehumidify while raising the indoor temp and lowering RH?
3. Wouldn’t this result in a significant Energy-penalty?
4. At what point would it be most energy efficient to stop “free cooling”?
Thanks in advance,
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