After 122 minutes, there was a strange sound. It turned out that the tank ran out of oil. Following this incident, the institute carried out the test at its own expense and in the end, Dr. Thoma received a F180 certificate. It turned out that after three hours of treating a Holz100 wall with a 1000 ° flame, the temperature on its other side rose only by 1.8° C.
Holz100 Canada Inc.