What is Fresh Air System and ERV?
Both the Fresh Air System and ERV is to regulate indoor air quality. However, ERV has the addition of an Energy Recovery feature.
Energy Recovery Ventilator (ERV) is equivalent to a compact Commercial Air Handler. In an air-conditioned building, when air exchanges take place, indoor cooler but higher in airborne pollutant air is exhausted and in exchange, outdoor air of higher temperature is drawn through an ERV Fresh Air System. When both the cooler and hotter air passes through the energy recovery coil, the cooler temperature is passed on to the hotter air to save cooling energy.
An ERV Fresh Air System is practical in terms of cost and application when a significant amount of air exchanges take place that requires a significant transfer of energy, such as in an air-conditioned sealed environment with high occupancy, i.e., auditorium, cinema, gymnasiums, and hospitals.
However, in a smaller less occupied sealed environment, investing in an ERV, a bi-directional system is optional. A unidirectional fresh air unit paired with an exhaust unit could possibly be most efficient and effective, in terms of maintenance and installation.
*Know the options. Make the right choice according to your needs.