HVAC 3D Design Learning Studio vs HVAC Mastery

HVAC3D is a professional-grade HVAC reference and learning tool built around an interactive 3D model of a fully engineered 3-story commercial building. Tap any component — AHU, chiller, VAV box, DDC controller — to see its specs, code references, and system connections in real time. Version 3.0 adds six major tools: Duct Sizing Calculator — SMACNA equal-friction and velocity method sizing for round and rectangular ducts, with live ASHRAE velocity and friction limit checking. ASHRAE 62.1 Ventilation Calculator — Multi-zone Ventilation Rate Procedure (VRP) with space-type lookup from Table 6-1, zone-by-zone breathing zone OA, and system outdoor air (Vot) output. Hydronic Pipe Sizing — Darcy-Weisbach pipe sizing for chilled water, hot water, and condenser water. Input GPM, tons, or MBH and get a recommended pipe size with Reynolds number and friction factor. Sequence of Operations Library — Six complete BAS control sequences: Economizer, DCV, Supply Air Temperature Reset, Morning Warm-Up, Chiller Staging, and VAV Box Control — all per ASHRAE Guideline 36. A2L Refrigerant Safety Guide — 2025 installation requirements for R-454B and R-32 including detector placement, machinery room ventilation, charge limits, and EPA AIM Act compliance per ASHRAE 15-2022. PDF Export — Share the Equipment Schedule, ASHRAE 180 Inspection Checklist, and Calc Sheets as formatted PDFs via AirDrop, email, or Files. The full feature set includes: 3D interactive building model • Floor-by-floor and system filtering • Component info panels with code citations • Learning Hub (Quiz, Glossary, Fault Simulator, Load Calculator, Guided Tour, Violations, Inspection Checklist) • Psychrometric Chart (SI + IP) • System Design Wizard • Refrigerant Phase-Out Guide • Floor Plans • Riser Diagrams • Equipment Schedule • Operation Matrix • Gallery of 49 professional HVAC diagrams Standards covered: ASHRAE 62.1 / 90.1 / 15 / 180 / Guideline 36 • IMC • SMACNA • ACCA Manual J • NFPA 90A / 92 / 96 • EPA AIM Act For educational and reference use only. All system designs must be reviewed and stamped by a licensed mechanical engineer before implementation. ASHRAE, SMACNA, NFPA, ACCA, ANSI, ASME, IMC, IBC, UL, and EPA are trademarks or registered trademarks of their respective organizations. HVAC3D is an independent educational application and is not affiliated with, endorsed by, or sponsored by any of these organizations. All standard references are cited for informational purposes only and do not constitute legal or engineering advice.

HVAC Mastery is the hands-on study companion for anyone learning the heating, ventilation, air conditioning, and refrigeration trade — from first-year apprentices to experienced technicians brushing up for certification. WHAT YOU'LL LEARN 4 structured learning tracks take you from fundamentals to EPA 608 certification prep: - HVAC Fundamentals: Heat transfer, refrigeration cycle, system components, electrical basics - Core Systems: Air conditioning, heat pumps, gas furnaces, air distribution, controls - Advanced Systems: Commercial refrigeration, hydronic systems, IAQ, building automation - EPA 608 Certification: All four sections (Core, Type I, Type II, Type III) with full practice exams INTERACTIVE DIAGRAMS & TOOLS Go beyond reading — tap, test, and troubleshoot: - Electrical circuit diagrams with interactive disconnect, contactor, and transformer controls - Motor wiring diagrams for PSC, CSR, split-phase, ECM, and 3-phase motors with on-diagram meter probes - Thermostat wiring simulator for heat pump, gas furnace, A/C, and electric heat systems - Refrigerant cycle simulator with fault injection — see what happens when components fail - Built-in calculators: superheat/subcooling, Ohm's law, wire sizing, duct sizing, refrigerant charge HANDS-ON CHALLENGES Test your skills with real-world scenarios: - Wiring challenges: wire a system from scratch and check your work - Troubleshooting challenges: diagnose faults using meter readings step by step - Service call scenarios based on actual field situations from HVAC textbooks - Timed quizzes for every module with score tracking FIELD REFERENCE TOOLS Quick-access references you'll use on the job: - Refrigerant guide with P/T charts for 20+ refrigerants including R-290 and R-454B - Winding resistance tables, megohm test thresholds, capacitor testing procedures - ECM error codes, amp draw diagnostics, motor rotation checks - Compressor diagnostic reference with wiring and electrical nomenclature STUDY FEATURES - 190+ flashcards covering every major topic - Bookmarks and personal notes on any lesson - Dark mode for late-night study sessions - Daily study reminders to keep your streak alive - Progress tracking with badges and completion percentages - Cloud sync — pick up where you left off on any device COMPLETELY FREE HVAC Mastery is 100% free. All lessons, quizzes, flashcards, interactive diagrams, and field reference tools are available at no cost. Create an account to save your progress across devices. Privacy Policy: https://hvacmastery-app.vercel.app/privacy Terms of Service: https://hvacmastery-app.vercel.app/terms Built by HVAC professionals for HVAC professionals. No ads — just the knowledge you need to pass your exams and succeed in the field.