Crossword clues for the word: HVAC The word HVAC has appeared as an answer to at least 5 crossword clues on different crossword puzzles. Crossword clues for HVAC Showing 1 to 5 of 5 results Clue(s) Builder’s concern, for short Climate control syst. Climate control system, in brief Sort of rooftop unit, familiarly Temperature control syst.