Energy recovery core (ERV) is a crossflow exchanger that incorporates a selective membrane for moisture transfer without allowing cross contamination of the air streams. Used for balanced mechanical ventilation in humid environments to reduce air conditioning (AC) energy cost. Water condensation by the AC is reduced by allowing water vapor from fresh air stream to migrates across the membrane into the exhaust stream. In colder climates, moisture transfer is reverse and the unit helps to moderate humidity and the core is a highly efficient heat exchanger. Each core is tested to ensure low leakage.
Adding a ventilation system to your home can be beneficial for many of reasons: It keeps the air in your home fresh, it can diminish allergens or pollutants in the air and it can help retain relative humidity while preventing too much moisture to remain in your home.
The most popular choices in the current markets are the heat recovery ventilation (HRV) or energy recovery ventilation (ERV) systems
Then how do I choose the ERV and HRV?
Actually, the best option between an HRV and an ERV depends on your climate, your family size and personal specific needs. If you live in an area where your winters are long and dry, you might opt for an ERV system. Because the ERV allows some humid air to remain in the home, your home might not feel as dry, which may reduce issues like dry skin and static electricity.
In summer time, the use of an HRV will usually increase the humidity level inside your home, so an ERV is better in hot and humid zones. But a dedicated dehumidifier will likely do the trick much better. At the very least, the ERV will lower the load on the air conditioning system, even if it can’t keep up with the high humidity level on the outside.
So in the end, there is not one right choice between ERV & HRV systems. It depends on your climate, your lifestyle and your home.
One thing is for sure, whichever you choose, an airtight home with an ERV or HRV is an evolutionary leap beyond the leaky houses of the 20th century, don't lose sleep over which one to get, ERV or HRV – just get one.
Your ERV/HRV will occasionally have some condensation discharged from the drains. Most moisture is directed outdoors with the exhausted air so it isn’t unusual for there to be no water in the drains.
Yes, ARES ERV/HRVs are designed to be used for energy efficient fresh air/ventilation all year-round.