| Sponsored | Named for their ASHRAE safety classification, A2L refrigerants are characterized by mild flammability, low toxicity, and low global warming potential (GWP). They include hydrofluoroolefins (HFOs) and HFO blends. A2L refrigerants offer similar operating characteristics to legacy refrigerants, a safer profile than ammonia and hydrocarbon refrigerants... |
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| | | The skilled trades represent a long tradition, but little about the profession feels traditional today. Contractor work is facing rapid change due to advances in technology and changing customer expectations about their homes, systems—and budgets. Meanwhile, the contractor’s other “jobs” keep getting bigger and harder to manage: recruiter, trainer,... |
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