1104.3.1 Air-conditioning for human comfort.
MC § 1104.3.1
Group A3, B1, B2 and B3 refrigerants shall not be used in high-probability air conditioning systems for human comfort. Exceptions: 1. Sealed absorption and unit air-conditioning systems having refrigerant quantities not exceeding those set forth in Table 1103.1.
2.Industrial occupancies. Nothing in this section shall be construed to allow the use of Group A3 and B3 refrigerants if otherwise prohibited. Table 1104.3.1Special Quantity Limits for Sealed Ammonia/Water Absorption and Self-Contained Systems Type of Refrigeration SystemMaximum Pounds for Various OccupanciesInstitutionalPublic Assembly / Large MercantileResidentialCommercialType of Refrigeration SystemMaximum Pounds for Various OccupanciesInstitutionalPublic Assembly / Large MercantileResidentialCommercialSealed Ammonia / Water Absorption SystemIn exit access or lobbies0 0 3.3 3.3 In adjacent outdoor locations0 0 22 22 In other than exit access lobbies0 6.6 6.6 22 Unit SystemsIn other than exit access or lobbies0 06.622 For SI: 1 pound = 0.454 kg. (Am. L.L. 2023/077, 6/11/2023, eff. 6/11/2023) Editor's note: For related unconsolidated provisions, see Appendix A at L.L. 2023/077.
