October 8, 2021, started the 1 138 day period in which viessmann.ru had 2 availability tests performed. In response, on December 5, 2022, viessmann.ru, which has been operational for 2 times during all conducted checks, returned a code 200. Inspections carried out as of November 20, 2024, showed viessmann.ru faced no occurrences of inoperability. Based on the responses received, it has been confirmed that there were no errors as of November 20, 2024. On December 5, 2022, viessmann.ru responded in 1.717 seconds, while the average response time is 0.975 seconds.