The purpose of this guideline is to provide information to support the application of Air-to-Air Energy Recovery Ventilation Equipmetn (AAERVE). This guildeline supports AAERVE that is manufactured using Air-to-Air Heath Exchangers (energy recovery components) rated in accordance with ARI Standard 1060. These recovery components include Heat Pipe Heat Exchangers, Plate Heat Exchangers, and Rotary Heat Exchangers.