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.
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