One and Two Flue Chimney Construction

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Across
  1. 1. severe weather mortar below ground
  2. 4. spring loaded damper atop chimney
  3. 5. a door to access flue for cleaning
  4. 7. concrete top of chimney to shed water
  5. 8. guard metal hat sits atop the chimney flue
  6. 10. allows water run off not to touch chimney
  7. 12. default mortar for chimny, above ground
  8. 13. how many appliances allowed per flue
  9. 17. sliced in half view
  10. 18. depth in ground where ice no longer exists
  11. 19. flashing seals the base of the chimney at roofline
Down
  1. 2. shows object in frontal view
  2. 3. exhaust flow of gasses
  3. 4. round pipe connecting heater to flue
  4. 6. a course of brick between flues
  5. 9. placing flues at different heights
  6. 11. mortar used to lay flues
  7. 14. tubular frames allowing masons to work at heights
  8. 15. 1 part cement 2 parts sand 3 parts stone
  9. 16. concrete support beneath chimney