What is the best type of ductwork?

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Tags

1. #tricky
2. #second
3. #least
4. #ducts
5. #possible
6. #expensive
7. #ductwork
8. #attach
9. #shaped
10. #flexible
11. #outlet
12. #where
13. #supply
14. #typically
15. #spaces
16. #ducting
17. #rigid
18. #install