Recovery-Cylinder 80% Fill
The maximum net refrigerant a recovery cylinder may legally hold under the 80% fill rule, from the stamped water capacity and the refrigerant's liquid density, plus the headroom left and the fill / do-not-fill action.
Formula and source
specific_gravity = density(lb/gal) / 8.34; max_net = 0.80 x water_capacity x specific_gravity; remaining = max(0, max_net - current). Do not fill when current >= max_net.
DOT / AHRI 700 / EPA Section 608 recovery practice (by name).
Audience
This tile is built for hvac and the adjacent professions in the HVAC group. The interactive calculator runs entirely in your browser. No account, no fee, no advertising, no tracking.
Related tiles
Posture
Rough Logic answers the math question the working professional asks on the job. The site is a calm, fast, ad-free, account-free, ever-free reference. It does not interpret code. It does not replace the licensed professional. It does not store your inputs. The Authority Having Jurisdiction governs all installations and inspections.