Refrigerant Charge Calculator
Additional Charge for Line Set
Calculate extra refrigerant for longer line sets
Subcooling Check
Check if subcooling is within target range
Formula
Additional Charge (oz) = Extra Length (ft) x Charge Rate (oz/ft) | Subcooling = Condensing Temp - Liquid Line Temp
Frequently Asked Questions
How much refrigerant per foot of line set?
For R-410A with 3/8 inch liquid line, approximately 0.6 oz per foot of additional line beyond the factory charge length.
What is subcooling?
Subcooling is the temperature difference between the condensing temperature and the actual liquid line temperature. Target is typically 8-12F.
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