The widely cited HVAC profitability benchmark of 5.8 percent median net margin, supposedly from a 2024 ACCA study, does not exist in any primary source. Industry sites and consultants have spent years quoting an unverified citation loop, leaving US contractors without a credible published net margin baseline. Here is an analysis of how the phantom data spread and the five specific metrics operators should measure instead: vwcg.app/blog/the-…

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