How long does flex duct last?

Related questions

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4. What is the difference between air duct and vent?
5. Can dirty air ducts make you sick?
6. Is it OK to cover air vents?
7. How many return air vents are needed?
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Tags

1. #metal
2. #hundred
3. #moisture
4. #years
5. #greatly
6. #installed
7. #shelf
8. #ductwork
9. #gotten
10. #silver
11. #water
12. #depending
13. #lining
14. #great