Pockettech HVAC vs Origin Duct Calculator

PocketTech puts two powerful diagnostic tools in your pocket — AI-powered analysis and a real community of HVAC professionals. Whether you're a seasoned technician or a homeowner trying to understand what's wrong with your system, PocketTech gives you answers fast. AI DIAGNOSIS Describe your problem, share a photo, and get step-by-step diagnostic guidance instantly. Our AI is trained to think like an HVAC technician — it asks the right follow-up questions, identifies likely causes, and walks you through the fix. Save your diagnostic sessions and pick up where you left off. COMMUNITY FIELD FIXES Real fixes from real techs. Browse solutions posted by HVAC professionals from the field, ask questions, and share your own wins. When the AI gives you an answer, the community can back it up — or catch what the AI missed. FREE FEATURES - 5 AI diagnostic messages per day - Full access to the community forum - Browse and search field fixes POCKETTECH PRO - 150 AI messages per day - Unlimited photos in AI chat - Save and revisit diagnostic sessions - Chat history preserved across sessions - Priority AI responses Whether you're diagnosing a refrigerant leak at 2am or trying to figure out why your heat pump isn't defrosting, PocketTech is the tool that works as hard as you do. $12.99/month or $99/year. Cancel anytime. Terms of Use: https://pockettech1.github.io/pockettech/terms-of-service

Built by installers, for installers. Origin Duct Calculator puts the everyday math of industrial ventilation and dust collection right in your pocket. Whether you're laying out a new system, troubleshooting an existing one, or double-checking numbers on the jobsite, get fast, reliable answers without digging for a chart or a spreadsheet. Developed by Origin Ductworks, an American-made and American-owned manufacturer of clamp-together and flange-together industrial ductwork, this app is backed by decades of hands-on experience designing, installing, and troubleshooting dust collection systems. WHAT'S INSIDE • Duct Velocity: Calculate air velocity from airflow and duct size to make sure your system keeps material moving and avoids settling. • Duct Sizing: Find the right duct diameter for your required CFM and target velocity. • Velocity Pressure: Quickly determine velocity pressure for system design and balancing. • Fan HP Estimator: Estimate the horsepower needed to move your airflow against system resistance. • Circumference & Diameter: Convert between circumference and diameter instantly, perfect for measuring existing pipe in the field. • Rect to Round: Convert rectangular duct dimensions to an equivalent round diameter. WHY ORIGIN • Field-tested expertise from a team with over 25 years in industrial ductwork • Simple, installer-focused design with no clutter • Welded and made in Pennsylvania, USA • Knowledgeable support when you need it From woodshops and grain handling to blast applications and heavy-duty custom systems, Origin Ductworks builds duct for the toughest jobs, and now the tools to design them. Need ductwork for your next project? Visit originduct.com or call 833.467.3163.