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[JayUSA]

All,

I've been using a heating/cooling spreadsheet, and I'm struggling to understand how reliable and accurate it is.

For example, where does the value in "Table_Results" C12 come from? Apparently, it is generated by some sort of logic that is kicked off by the "Update Results" button. But I don't understand what action is triggered or what logic applied! It's kind of hard to rely on a model when you can't see how the results are calculated!

Jay