Airforge: HVAC/R Field Tools

Airforge is a field toolkit for HVAC and refrigeration technicians. 33 calculators and references, built on verified data, that work entirely offline — because the mechanical room never has signal. No account. No sign-in. Nothing to load. Open the app and start working. **CHARGING, SUPERHEAT & SUBCOOLING** • Pressure-temperature (P/T) chart for 58 refrigerants — dew and bubble curves, verified point-by-point against reference thermodynamic data to within 0.0005 psi • Superheat and subcooling calculators with manufacturer target ranges • Line-set charge adder, compression ratio, target evaporator exit temperature • Uses the dew curve for superheat and the bubble curve for subcooling — the way a blend actually behaves **SYSTEM DIAGNOSIS** Enter your gauge pressures and line temperatures. Airforge ranks the likely faults — undercharge or leak, overcharge, non-condensables, restricted metering device, dirty condenser, low or high airflow, TXV problems — and shows the reasoning behind each, not just a one-word verdict. It is a second opinion for the readings you already trust. **AIR SIDE** • CFM from temperature rise, duct sizing (round and rectangular) by velocity • Static pressure, external static, target airflow • Full psychrometrics: wet bulb, dew point, enthalpy, relative humidity, grains • Delta-T check and filter sizing **ELECTRICAL** • Ohm's law and power, motor FLA reference, capacitor microfarad check • Wire ampacity and voltage drop **HEAT & COMBUSTION** • Furnace temperature rise, combustion air, gas pipe sizing • Water heating and a quick heat-load estimate **REFERENCE** • Refrigerant safety class and GWP, EPA 608 quick reference • Unit conversions and altitude / barometric correction that feeds every psychrometric calculation automatically **BUILT FOR THE JOB** • Everything works offline • Job records — save readings against a customer and address, then export a clean PDF and text or email it before you leave • Your company name, phone and licence number head every report • Pin the tools you use every day; search by refrigerant, formula or unit • Adaptive layout: comfortable on a phone, laid out properly on a tablet **FREE & PRO** The core toolkit is free, including 12 common refrigerants. Airforge Pro unlocks all 58 refrigerants and unlimited job records — a one-time purchase, no subscription. A rewarded video grants a 24-hour Pro trial so you can try it on a real call. Remove Ads is available on its own. Built by a working tradesperson, not a content farm. Found a reading that looks wrong? Email [email protected] — accuracy reports go straight to the top. Airforge is an independent tool and is not affiliated with any refrigerant manufacturer or equipment brand. Always follow equipment manufacturer specifications and applicable code.