Substitute for R-500 in most instances also.
US
EPA SNAP "acceptable" for most all
stationary/transport (cargo) refrigeration NOW
EPA acceptable NOW for Cars (MVAC) use. EPA has reviewed the
application and found R-406A acceptable for automotive use
subject to "use" conditions (unique fittings, barrier
hoses, etc) Published in the Federal Register Oct 16, 1996,
effective date 11/15/96. Text or
Adobe
Acrobat (PDF) formats of this final rule from the EPA
homepage. GHG-X4 (AutoFrost-X4/Chillit) and GHG-HP are also
included in this final rule.
Technical help - 1-888-AUTOFROST
(1-888-288-6376). Ask for code 10 [service provided by MEA]
NONFLAMMABLE as formulated, only weakly flammable after worst
case leakage
Performs equal to or R-12.
Monroe Airtech Question & Answer Sheet
on Autofrost (Adobe Acrobat PDF format)
About 95% less Ozone Depleting and 88% less Global Warming than
R-12 R-406A ODP is 0.0553 (per pound) or 0.0442 (per system, only
80% as much as R-12 is used). R-12 ODP is 1.0. GWP is based on
halocarbon GWP, 100 yr ITH.
CANNOT BE VENTED (in the USA) - must be recovered (contains
HCFCs)
DO NOT USE IN R-134a systems. PAG or Ester (POE) oils may be
destroyed.
Autofrost Compatibility issues