What is the BTU file format?
A file with the .BTU extension is a file known as Diablo BTU Calculator. It belongs to the Misc Files category. This format is associated with Diablo Analytical, Inc..
The reliable way to open a .BTU file is with software that recognises this exact format, rather than guessing from the file name. If you are not sure what created a file, our file identifier can read its first bytes and name the real format, even when the file has been renamed.
We are still gathering the list of programs that open .BTU files. A fully verified, hand-written description of this format is being prepared; until then, the details on this page are drawn directly from our database.
Format details
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