Here is a new web page with more advanced discussion than most web pages. Includes an idea for the scientific community that would help reduce the confusion on the Internet.
The site states: """The hottest room fires are commonly measured at about 1200 °C."""
Which is total bunk.
Not even NIST tries to present such nonsense:
"""Of the more than 170 areas examined on 16 perimeter column panels, only three columns had evidence that the steel reached temperatures above 250ºC… Only two core column specimens had sufficient paint remaining to make such an analysis, and their temperatures did not reach 250 ºC. ... Using metallographic analysis, NIST determined that there was no evidence that any of the samples had reached temperatures above 600 ºC.""" (NIST, 2005, pp. 176-177;