Calculators -

Online HVAC and Refrigeration Training

Additional Charge Weight Calculator

Enter the length in Feet ADDITIONAL from the standard charge the system comes in. Many systems come charged for a 15' lineset but this is not universal. Make sure you follow the manufacturer's guides before using this calculator.

Refrigerant Type Suction Line OD" Liquid or Saturated Line OD" Additional Lineset Length ft

Additional charge to add in ounces: Converted to lbs & ounces: Converted to lb decimal:

Air Density

Accurately calculate air density based on local altitude and humidity

Altitude Feet Temperature ° F Relative Humidity %

Air Density:

Nitrogen Pressure Calculator

Atmospheric Pressure PSIA Before Pressure PSIG Before Temperature ° F After Temperature ° F

After Pressure:

Recovery Tank Fill

Calculate total tank and refrigerant weights

Tank Tare Weight lbs Tank Water Capacity lbs Max Temperature ° F Refrigerant Type Liquid Density

Total Weight(TW + Fill Weight): Refrigerant Weight(Fill Weight):

Superheat & Delta T

Calculate target superheat for fixed metering device (piston) systems and air split on 400 CFM per ton A/C

Condenser Air Dry-Bulb Temp: ° F Return Air Wet-Bulb Temp: ° F Return Air Dry-Bulb Temp: ° F

Superheat & Delta T Result: Target Temp Split:

Under Load Capacitor Test

Test capacitors while the system is running

Voltage Across Capacitor Volts Amperage of Motors Start Winding Ampers Capacitor Rated MFD MFD

MicroFarad Rating: Calculated MicroFarads: MicroFarad Variation: MicroFarad Variation (%):

Voltage Imbalance Calculator

Calculate three-phase voltage imbalance

L1 to L2 - Volts Volts L2 to L3 - Volts Volts L1 to L3 - Volts Volts

Average Voltage: Voltage Imbalance: Motor Temp Increase: