Gas Furnaces: Remember.. Remember.. The 5th of November

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Across
  1. 5. this creates a draft
  2. 6. another name for a downflow furnace
  3. 8. A British terrorist who tried to blow up Parliament in 1606
  4. 11. This is a deadly gas in furnace exhaust
  5. 12. This air type pressure determines the airflow
  6. 14. the return subtracted from the supply
Down
  1. 1. This is the part that heats the air
  2. 2. British thermal unit
  3. 3. a safety mechanism to stop overheating
  4. 4. safety device to ensure draft
  5. 7. What Gas Furnaces produce
  6. 9. When flames are affected by the airflow
  7. 10. a furnace configuration for low headspace
  8. 13. cubic feet per minute