HVAC Math: Superheat & PT

HVAC Math is a superheat and subcooling calculator for service techs: a refrigerant charge calculator, a PT chart for refrigeration and the everyday HVAC math, offline and with no account. CHARGE CHECK • Superheat and subcooling against target, typed on a glove-size keypad • Piston: target superheat from the California Title 24 table (Table RA3.2-2), from indoor wet bulb and outdoor dry bulb • TXV / EXV: target subcooling from the data plate • Superheat reads the dew point and subcooling the bubble point, so blends come out right • Show the math: every step and its source, ready to show the customer PT CHART • 40 refrigerants from published manufacturer tables, including R-410A, R-32, R-454B, R-22, R-407C, R-404A, R-134a and R-290 • Pressure to temperature or temperature to pressure, with dew and bubble side by side • Glide, GWP and ODP for each refrigerant EVERYDAY MATH • Airflow: CFM from sensible load and temperature split, and total heat from airflow and enthalpy change • Electrical: watts and BTUH from volts and amps • psig, kPa or bar; °F or °C HVAC MATH PRO: ONE PURCHASE, NO SUBSCRIPTION • Ductulator: round and rectangular duct sizing by equal friction, with velocity • Psychrometric calculator: relative humidity, dew point and enthalpy from dry and wet bulb • Converters: pressure, temperature, airflow and static pressure • Jobs and history: save a check to a job, and look back through past checks YOURS, ON YOUR PHONE • Works fully offline. No account, no sign-up • Your jobs and readings stay on your phone For qualified technicians. HVAC Math does the math; it doesn't give charging procedures. Verify against the equipment manufacturer's data. Refrigerant handling requires EPA Section 608 certification (US).