Possible Clues:

• Frantically fan the heir of a German physicist
• Scale peak by sound after a brief hour going through moorland
• In the RAF he worked as a physicist
• Way of measuring warmth in unusually fine hearth
• It's hot in a fire, then -- possibly as indicated by this?
• The scale of hot stuff in fine hearth structure
• On which water freezes at 32 deg.
• Rewrote Fear? Hint - it's about that man - the one, to a degree, conscious of the heat perhaps!
• Physicist; temperature scale
• To a degree, the scale of unnatural fear? Hint - it's about that man!