Refrigerant Line Charge Calculator

Estimate the added refrigerant charge for a line set longer than the factory pre-charge, by liquid-line size.

Line Set

Line Set Length (ft)

Factory Pre-charge (ft)

Often 15 ft

Refrigerant

Liquid Line Size

oz/ft values are R-410A-typical. R-454B/R-32/R-22 per-foot charges are pending — always follow the equipment nameplate.

Added Charge

Add Refrigerant70 oz

In Pounds4.38 lb

Extra Line Length35 ft

Adjustment for line length beyond the factory pre-charge — always follow the equipment nameplate / spec.

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