What’s the difference between HRV and ERV?

What is the kitchen fresh air system
What are the advantages and disadvantages of HRV?

Not all HRVs work in exactly the same way. An alternative system called energy recovery ventilation (ERV) works in a similar way but transfers some of the moisture from the outgoing airstream into the incoming air, so it keeps the humidity in your home at a constant level. That’s important if you don’t want your home too dry. As a general rule, ERV is a better option if you have air conditioning and live in a humid climate, because it will help to keep moisture outside, reducing the load on your air conditioner and saving on the air-con bills. HRV is often better if you don’t have air conditioning, or live in a less humid climate, since it will help keep the humidity down by transferring excess indoor moisture outside.