HVAC Refrigerant

[Junior Brown]

What type of AC refrigerant might be used in a 30yr old (GE brand) residential system? R22..R12? Do newer systems use R134?

Thanks,

Bob

[HeatMan]

What does the condenser say?

Thirty year old unit may take R500.

[Richard J Kinch]

Almost certainly R-22.

No, not your typical split system. Still R-22 or (ugh) Puron.

[Stormin Mormon]

Thirty years ago, essentially all AC systems (residential or commercial) used R-22. Please let us know what you're trying to do. Are you a service tech?

R-134A was not used in any signifigant ammounts till 1993 or 1994.