These days they use R410a or 134 (cars) and anyone can buy that. I
still have a jug of R22 in case the "legacy" system I have in the
addition ever fails. (Heluva a deal for a "new old stock" machine).

The other thing to stock up on for a dark and stormy night is the HOT SURFACE IGNITER used in many gas furnaces these days. They are basically a glow plug and will fail with no warning leaving you with no heat. Its a good idea to have a spare on hand and know the symptoms and how to replace it.


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