Vent-off is AI-powered HVAC equipment intelligence. Upload mechanical drawings — AI extracts every piece of equipment with confidence scores and audit trails, matches to your catalog, and generates bid-ready pricing. Three tools, one platform: • Free ASHRAE 62.1 CFM Calculator • AI Takeoff — auto-extract equipment from plan pages with 90%+ confidence • Head-to-Head product comparisons on CFM, power, noise, and price Built on ASHRAE, AMCA, UL, CSI Div 23 standards. Now accepting pilot partners.