Data as of Jul 25, 2026 · Based on 2,718,867 AI responses across 9,511 prompts · See how Parse measures this
Washington HVAC Authority maps the HVAC service landscape across Washington State, organizing providers by licensing, permitting, and code standards from the Washington State Building Code Council and Department of Labor and Industries. The network classifies contractors by service category—residential, commercial, equipment suppliers, and specialty providers—based on publicly verifiable L&I registration data.
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