Refrigerant Charge Calculator
Calculate additional refrigerant charge needed based on line set length for R-410A, R-22, and R-32 systems.
Check the data plate on your outdoor unit for the refrigerant type
The smaller of the two copper lines running between your indoor and outdoor units
Total length of the liquid line from outdoor unit to indoor coil
Length the factory charge covers — check the installation manual (usually 25 ft)
Total factory charge in ounces — found on the unit data plate. Leave blank if unknown.
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