Upgrade Already have a home ventilation system? Whether it’s a DVS or another brand, upgrading is easy. Add an extra DVS outlet or other features Extended your house? Family expanding? It’s simple to add an additional DVS outlet or other features. Upgrade your existing DVS system Upgrade your current DVS home ventilation system and experience the very latest in home ventilation technology. Read about our upgrade options here. Change to a DVS system If you have a non-DVS home ventilation system but you’re ready to enjoy the benefits of our superior technology, we can help. Moved into a house with a DVS? A wise choice! Contact us to learn all about it.