Why VRF Charge
Calculate additional refrigerant charge for VRF/VRV systems from liquid-line lengths and diameters, check indoor/outdoor connection ratios, and keep the total charge honest.
Per-diameter rates
Standard liquid-line sizes from 1/4" to 3/4"+.
Brand presets
Generic R-410A plus manufacturer profiles, fully editable.
Connection ratio
Indoor vs outdoor capacity check with pass bands.
Segment list
Add pipe runs; the app sums the extra grams.
g / kg / oz
Metric and imperial output.
Offline
Commissioning basements have no bars.
How it works
Pick a profile
Generic or your manufacturer's table.
Add pipe runs
Length × diameter for each liquid-line segment.
Read total charge
Factory charge + additional grams.
FAQ
Are the g/m values universal?
They are typical manual values — always verify against your exact model's table. Profiles are editable for that reason.
Does it handle connection ratio?
Yes — indoor/outdoor capacity ratio with the usual acceptance band.
Imperial pipes?
Enter 1/4", 3/8", 1/2", 5/8", 3/4" directly.
Who is it for?
VRF installers, commissioning engineers and service techs.