How does an Energy Recovery Ventilator (ERV) keep you healthy?

It works like this: The ERV has two fans in the cabinet along with a heat exchanger and a desiccant. The outside air fan (1) draws air in from the outdoors; the Exhaust fan (2) draws air in from the home and the heat exchanger (3) heats or cools the incoming outside air while the desiccant removes humidity. Okay, so what’s the benefit? To help control indoor air pollutants and contamination it is essential to