Guide to Harp® Replacement Refrigerants

R11 R123              
R12 R401A ** R409A ** R134a R407D R413A R600a ***    
R22     R404A R407C R410A R417A R290 *** R1270 ***
R500 R409B **   R134a R407D        
R502 R402A ** R408A ** R404A R407A R507 R290 *** R1270 ***  
R503     R23 R508A        
* Check low temperature compatibility. Often 50/50% Mineral / Alkylbenzene is preferred.
** Check elastomer materials compatibility.
*** Not compatible with natural or silicone rubber or lubricants containing silicone additives.