American Aldes manufactures Heat and Energy Recovery Ventilators (HRV/ERV) using all available exchange technologies – aluminum, polypropylene, high-latent-transfer enthalpy, polymeric enthalpic membrane, and desiccant wheel – so you can choose the most appropriate method for your application and climate. From small apartments to large commercial buildings, there is an Aldes HRV or ERV that meets your needs. Consult the HRV/ERV Selection Guide for help choosing the appropriate model.