2025-05-07 00:00:00 The Weishaupt Energy Manager (WEM) is used to control the most important functions and settings such as heating and hot water temperatures, heating times and setback phases. You can read current values and learn about system events. The WEM App allows you to access your Weishaupt heating system quickly and easily via the WEM-Portal (https://www.wemportal.com). This requires a Weishaupt gas condensing unit type WTC-B and an Internet connection.