What does the R stand for in HVAC?

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Tags

1. #install
2. #training
3. #definitions
4. #refrigeration
5. #options
6. #qualified
7. #heating
8. #conditioning
9. #industry
10. #becoming
11. #about
12. #systems
13. #cooling
14. #interested
15. #ventilation
16. #stands
17. #professional