HCFC (hydrochlorofluorocarbon)
A transitional refrigerant family that added hydrogen to reduce, but not eliminate, ozone depletion.
Hydrochlorofluorocarbons are the transitional family between CFCs and modern chlorine free refrigerants. By adding hydrogen to the molecule, chemists produced compounds that break down more readily in the lower atmosphere, so a smaller fraction of the chlorine they carry ever reaches the stratosphere. The result is a family with substantially reduced ozone depletion compared to CFCs, but not zero, because chlorine is still present in the molecule.
That not zero is the key fact. HCFCs were adopted as interim substitutes precisely because they bought time: they let industry move away from CFCs quickly while chlorine free alternatives matured. But since they still deplete ozone, they were always scheduled for their own phase down, and the trade has spent years managing equipment designed around HCFC refrigerants as supplies tightened and service practices adapted.
On the exam and in the field, HCFCs occupy the middle of the refrigerant timeline. A technician should be able to place the families in order of ozone impact, recognize that HCFC charges remain in a great deal of working equipment, and understand that the full set of Section 608 handling obligations, from the venting prohibition to recovery and recordkeeping, applies to them exactly as it does to the other regulated families.
Related terms
| CFC (chlorofluorocarbon) | An early family of refrigerants containing chlorine, fluorine, and carbon, with severe ozone depletion effects. |
| HFC (hydrofluorocarbon) | A chlorine free refrigerant family that spares the ozone layer but can strongly trap heat in the atmosphere. |
| Ozone depletion | The destruction of stratospheric ozone by chlorine bearing chemicals, and the original reason refrigerant venting is prohibited. |
The 608 fact sheet
One printable page: the four certification types, the exam structure, the leak-rate and recovery numbers, all cited to the regulation. Free.
No spam. One useful sheet and occasional notes.