Refrigerant P/T chart
96 refrigerants, dew/bubble, glide, altitude
AC tonnage
BTU/sqft → tons by climate zone
Airflow CFM
Blower CFM from tons or sensible ΔT
Duct sizing
Round & rectangular from friction rate
Duct pressure drop
TEL fittings → in.wc vs blower ESP
Superheat
Fixed-orifice charging target
Subcooling
TXV system charging target
Delta-T
Return vs supply air temp split
Manual J quick load
Cooling / heating BTU estimate
Heat pump balance point
Aux heat crossover temp
Dew point
From dry bulb + RH
SEER cost
Annual cooling cost vs SEER2
Voltage drop
Long condenser whip / disconnect runs
Motor amps (FLA)
NEC single/three-phase FLA
Motor data (NEC)
Wire, breaker, MCA/MOP
Unit converter
PSI/kPa, °F/°C, BTU/kW