The unique dual-stream airflow design of Field Controls' Energy Recovery Ventilator (ERV) systems keeps outgoing stale air separate from incoming fresh air and completely rejuvenates the air throughout your entire home up to eight times a day. Nearly 90% of the energy used to cool a home is required to remove humidity. With an Energy Recovery Ventilation, humidity is removed from the air before it is brought into the home - greatly reducing cooling costs. The Field Controls Energy Recovery Ventilation uses membrane technology to transfer moisture and energy and our new, water-washable core is constructed with a non-cellulose material that will not deteriorate with moisture.