Does the Viessmann Energy Management system work without using the ViCare app? Yes, it will work without the ViCare app. But to make full use of the offered functionality we recommend to use the ViCare application. Energy Management Related articles What if I add a new product? How can I integrate it into my Viessmann Energy Management system? On which Viessmann devices can I use the Viessmann Energy Management system? How will I be informed about new Viessmann Energy Management functions and features? How are the CO2-Emissions and the CO2 Savings in the app calculated? Can my heating installer also see if I have bought the Savings Assistant package? Comments 0 comments Article is closed for comments.