S.C. Code Regs. 8-1303 - IMC 1104.3.1 Air conditioning for human comfort
High-probability systems used for human comfort shall use Group A1 or A2L refrigerant. In other than industrial occupancies where the quantity in a single independent circuit does not exceed the amount in Table 1103.1, Group B1, B2 and B3 refrigerants shall not be used in high-probability systems for air conditioning for human comfort.
Notes
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