Can dirty air ducts make you sick?

Related questions

1. Why is my room so hot compared to the rest of the house?
2. What is the difference between a register and a vent?
3. Can I clean air ducts myself?
4. Is air duct cleaning necessary?
5. What is the difference between air duct and vent?
6. Should ductwork be replaced after 20 years?
7. Which way does air flow in HVAC?
8. Which is better a heat pump or AC?
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10. How do I know what size flex duct I need?

Tags

1. #dander
2. #stuck
3. #cause
4. #cleaned
5. #building
6. #other
7. #allergens
8. #odors
9. #mildew
10. #presence
11. #syndrome
12. #dirty
13. #causes
14. #bring
15. #pollen
16. #musty
17. #ducts