Code compliance in many jurisdictions allows for both prescriptive and compliance paths for a dwellings energy consumption. ASHRAE 90.2 is an example of a compliance path outlining the application of such simulation models. A reference house has been use to evaluate the accuracy of Air-to-Air Energy Recovery simulation and associated energy use reduction in these models. This presenation provides information on the effect in modeling of Air-to-Air Energy Recovery for residential dwellings and evaluate the role of Air-to-Air Energy Recovery in a net zero home.