HVAC3D is the most comprehensive interactive 3D HVAC reference and training tool available for iPhone and iPad. Version 2.0 introduces three major new professional features that set it apart from any other HVAC app on the App Store. NEW IN VERSION 2.0 Psychrometric Chart A fully interactive ASHRAE psychrometric chart built directly into the app. Adjust dry-bulb temperature and relative humidity with sliders to instantly calculate enthalpy, dew point, wet-bulb temperature, humidity ratio, and specific volume. Results display in both SI (kg/kg, kJ/kg) and IP (gr/lb, BTU/lb) units. The chart shows ASHRAE 55 comfort zone boundaries, constant relative humidity curves from 10% to saturation, and a live state-point marker that moves with your inputs. Pinch to zoom for full detail. HVAC System Design Wizard A guided 5-step tool that recommends the right HVAC system for any project. Input building type (residential, light commercial, commercial, industrial), conditioned floor area, ASHRAE climate zone (1-8), and design priority (energy efficiency, first cost, quiet operation, or air quality). The wizard analyzes your inputs and provides a tailored recommendation with the system type, SEER2/EER/COP efficiency rating, installed cost range, refrigerant type, applicable ASHRAE/ACCA standards, advantages, and design considerations. Built on ASHRAE 90.1 energy code criteria and ACCA Manual J/N/D methodology. 2025 EPA Refrigerant Phase-Out Guide The most timely HVAC reference available for 2025: a complete guide to the EPA AIM Act refrigerant phasedown. Four tabs cover (1) the full R-22 through R-410A phaseout timeline through 2036, (2) side-by-side comparison of R-22, R-410A, R-454B, R-32, R-407C, R-134a, and R-1234ze with GWP, ODP, ASHRAE 34 safety class, boiling point, and EPA compliance notes, (3) a decision guide for contractors and building owners with existing R-22 or R-410A equipment, and (4) A2L refrigerant safety requirements including IBC/IMC 2024 leak detector provisions, ventilation requirements, and technician training guidance. THE INTERACTIVE 3D BUILDING Walk through a fully modeled 3-story commercial office building in 3D with transparent walls revealing every mechanical system simultaneously -- air handlers, VAV boxes, chillers, boilers, hydronic piping, ductwork, refrigerant lines, controls, and building automation systems. Tap any component for its name, ASHRAE code reference, function, inspection interval, and common failure modes. Systems modeled: Air handling units, VAV boxes with reheat, supply and return ductwork, ceiling diffusers, fan coil units, 250-ton chiller, cooling tower, chilled water pumps, 1000 MBH boiler, hot water pumps, rooftop condensing units, split-system air handlers, TXVs, filter-driers, DDC thermostats, BAS network, outside air intake, energy recovery ventilators, exhaust fans, fire/smoke dampers. LEARNING HUB -- 8 TRAINING MODULES Quiz, Glossary, Guided Tour, Fault Simulator, Load Calculator, Violations, Inspection Checklist, and App Guide. All content is HVAC-specific and references ASHRAE, ASME, SMACNA, and IMC standards. REFERENCE DOCUMENTS Zoomable floor plans and riser diagrams for chilled water, hot water, outside air, and refrigerant piping. Equipment schedule, load calculation worksheets, and a 49-image professional diagram gallery in 6 categories. Works on iPhone and iPad, portrait and landscape. Dark Mode. No internet connection required.
