# Unit Converter HVAC — 8 Categories of HVAC Units > 8 Categories of HVAC Units (iPhone/iPad app by Rizvan Adzhoian.) - Source: https://appshunter.io/ios/app/unit-converter-hvac/id6764647825 (this page in markdown: same URL + `.md`) - Developer: [Rizvan Adzhoian](https://appshunter.io/developer/1891746079) - Category: Utilities, Business - Price: $0.99 with in-app purchases - Age rating: 17+ - Requires: iOS 13.0 · 34 MB - Languages: English - Released: 2026-05-04 - Data updated: 2026-07-06 - User reviews in markdown: https://appshunter.io/ios/app/unit-converter-hvac/id6764647825/reviews.md ## What is Unit Converter HVAC? HVAC Unit Converter Pro helps HVAC technicians, engineers, refrigeration mechanics, and contractors convert between units instantly. Convert between all common air conditioning and refrigeration units instantly across 8 categories and 40+ unit types - eliminating calculation errors on job sites. 8 CONVERSION CATEGORIES: Temperature - °F, °C, K, °R (Rankine) for climate zones and equipment specs Pressure - PSI, kPa, bar, in. Hg, mm Hg, atm, Pa, in. w.c. (static pressure), microns (vacuum) for gauges and evacuation Energy & Heat - BTU, kJ, kcal, Wh, therm for load calculations Airflow (CFM) - CFM, L/s, m³/h, m³/s, m³/min for ductwork and ventilation Length & Duct - in, ft, mm, cm, m for duct sizing and pipe runs Area Calculations - ft², m², in² for room dimensions and surface area Volume & Capacity - gal, L, ft³, m³ for tank and system volumes Power & Output - BTU/h, W, kW, ton (refrigeration), hp, kcal/h for equipment ratings SMART FEATURES: Instant Conversion - Results update as you type, no button press needed Bidirectional Conversion - One tap to reverse conversion direction instantly Swap Units - Toggle between any unit pair in the same category Works 100% Offline - Field calculations without internet connection Accuracy Verified - Professional-grade precision for system design English & Spanish Support - Bilingual interface for diverse teams WHY HVAC PROFESSIONALS USE THIS APP: Eliminates manual conversion errors that cause mistakes Faster unit calculations than reference tables and charts Cross-checks between imperial and metric systems instantly Prevents equipment sizing errors from unit mistakes Works on every job site without cellular connection Dark theme prevents eye strain during outdoor work CONVERSION EXAMPLES HVAC TECHS USE DAILY: PSI to kPa for pressure readings on gauge conversions BTU to kW for international equipment specifications CFM to m³/s for ductwork design in metric regions °F to °C for climate zone design temperature conversions Tons to kW for heat pump capacity documentation BTU/h to watts for electrical load calculations PERFECT FOR: HVAC technicians on air conditioning service calls HVAC field technicians calculating refrigeration requirements Refrigeration mechanics sizing refrigerant lines AC contractors preparing equipment specifications HVAC design engineers in international projects HVAC apprentices learning unit conversions Building maintenance engineers managing equipment Commercial HVAC system commissioning work A tool trusted by HVAC technician teams nationwide. Part of HVACTools Suite - the complete HVAC technician and refrigeration calculator app collection for field diagnostics and system design. OPTIONAL PRO UPGRADE — $2.99 ONE-TIME IN-APP PURCHASE The following features require a separate one-time in-app purchase. They are not required to use the calculator: • Unlimited saved calculation history • PDF export of results • Dark theme • Ad-free experience ## Pricing and in-app purchases Base price: $0.99. **One-time purchases** | Purchase | Price | Type | | --- | --- | --- | | Pro Unlock | $2.99 | one-time | ## Version history (last 3 releases) ### 1.0.5 — 2026-06-11 What's new: - Added HVAC field units: in. w.c. (static pressure) and microns (evacuation vacuum) to Pressure - Added m3/min to Airflow and kcal/h to Power - now 41 units across 8 categories - All conversion factors covered by reference-anchor tests ### 1.0.4 — 2026-05-18 What's new: - Updated metadata for clarity per App Store guidelines - Optional Pro upgrade is a separate one-time in-app purchase (not required for calculator features) ### 1.0.3 — 2026-05-04 No release notes. ## More apps by Rizvan Adzhoian - [Conduit Fill Calculator-NEC](https://appshunter.io/ios/app/conduit-fill-calculator-nec/id6761846849) - [Electrical Load Calc NEC](https://appshunter.io/ios/app/electrical-load-calc-nec/id6763250945) - [Transformer Calc NEC](https://appshunter.io/ios/app/transformer-calc-nec/id6763311943) - [Voltage Drop Calc NEC](https://appshunter.io/ios/app/voltage-drop-calc-nec/id6763312448) - [Grounding Size Calc NEC](https://appshunter.io/ios/app/grounding-size-calc-nec/id6763312724) - [Breaker Size Calc NEC](https://appshunter.io/ios/app/breaker-size-calc-nec/id6763312865) All apps by Rizvan Adzhoian: https://appshunter.io/developer/1891746079 --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-07-06.*