Get our latest news and special sales. SubscribeOK. You may unsubscribe at any moment. For that purpose, please find our contact info in the legal notice.Notice? April 25, 2019. Dear Viessmann customers: guide to determine if your boiler(s) are affected by the Viessmann Heat Exchanger Replacement. The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software. THE SOFTWARE IS PROVIDED "AS IS", to beautiful publications and share them worldwide. Title: notice d'utilisation viessmann, Author: denis.lavenant, Length: 20 pages, Published: 2009-10-19. Heat Exchanger Replacement Safety Notice. If your boiler is affected, contact your heating contractor or Viessmann as soon as possible to schedule a URGENT – Heat Exchanger Replacement Safety Notice. Viessmann North America has decided to voluntarily inspect and replace the heat exchanger for the