Crossword clues for the word: COALGAS The word COALGAS has appeared as an answer to at least 7 crossword clues on different crossword puzzles. Crossword clues for COALGAS Showing 1 to 7 of 7 results Clue(s) Bygone heating fuel Certain heating fuel Formerly used heating fuel Furnace emission Once-common commercial fuel Poisonous emission Winter heating hazard