Refrigerant Charge Weighing
Charge in oz from line-set length, diameter, and refrigerant.
Example
You enter
- Refrigerant R-410A
- Sections diameter 3/8, length (ft) 25; diameter 1/2, length (ft) 5
You get
- Total charge 19.75 oz
- Total charge (lb) 1.234
Details, formula, and sources
Total charge = factory charge + per-foot adder × (line length − rated length). Per-foot adders from manufacturer line-set tables (oz/ft) by refrigerant and liquid-line diameter.
Manufacturer line-set bulletins (Daikin, Carrier, Trane, Rheem) by name.
Free at each manufacturer site.
Estimate. AHJ and licensed mechanical contractor govern. ACCA Manual J / D / S supersede rules of thumb.
Field names used by the API: refrigerant, sections, total_oz, total_lb
- Per-foot adder table data/hvac/charge-per-foot.jsonmanufacturer-attributed per row