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5,701 results
The new refrigerant of the future staring 2025 will be R-454b. R454b is an A2L, mildly flammable refrigerant. R-32, R-454b, and ...
90,408 views
3 years ago
The first day on the job as a new HVAC apprentice can be a daunting experience. You can do it! The first day on the job as a new ...
165,507 views
5 years ago