Crossword clues for the word: OILHEATER The word OILHEATER has appeared as an answer to at least 5 crossword clues on different crossword puzzles. Crossword clues for OILHEATER Showing 1 to 5 of 5 results Clue(s) "Solution for poor insulation, perhaps" Barrel-shaped device It causes a rise in temperature Small room-warming device Winter warmer