As the requirements for larger amounts of outside air supplied to a building space become a reality under ASHRAE standards, energy recovery ventilators (ERVs) are gaining more popularity. One could argue that an ERV for commercial applications is well on its way to becoming a standard accessory for those contractors and specifying engineers who need to meet these new fresh air requirements.
An ERV is designed to supply a predetermined amount of outside air into the space through roof or sidewall penetration or tie into an existing packaged or split air conditioning system.