Systèmes de Ventilation et Échangeurs d'Air | vänEE Systèmes de Ventilation et Échangeurs d'Air | vänEE - vanee.ca Common Air Exchanger Questions. We receive questions every week on how an air exchange works. Why an air exchanger is needed and important questions like the difference between an ERV and an HRV. This page is devoted to answering your questions and is updated on a daily basis. If you have a question that is not answered here simply contact us vanee.ca User's Manual, Read and save these instructions. VVI, 550 Lemire Blvd., Drummondville, Qc, Canada J2C 7W9, Heat Recovery Ventilators models: 04/01 #02053, VB0021, 1000 HE 2000 HE 3000 HE 3055 Compact HE 1.3 HE 1.8 HE 2.6 5585 Compact, Congradulations! You have made an excellent choice!