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Refrigerants shall be classified in accordance with ASHRAE 34 as listed in Table 18-28-1103.1.
Refrigerant Number | Chemical Name | Chemical Formula | Quantity of Refrigerant per Occupied Space | ||
Pounds per 1,000 Cubic Feet | Ppm by Volume | g/m3 A, C | |||
Refrigerant Number | Chemical Name | Chemical Formula | Quantity of Refrigerant per Occupied Space | ||
Pounds per 1,000 Cubic Feet | Ppm by Volume | g/m3 A, C | |||
Group A1 | |||||
R-11
| Trichlorofluoromethane | CCl3F | 1.6 | 4,000 | 25 |
R-12
| Dichlorodifluoromethane | CCl2F2 | 12 | 40,000 | 200 |
R-13
| Chlorotrifluoromethane | CClF3 | 18 | 67,000 | 290 |
R-13B1
| Bromotrifluoromethane | CBrF3 | 22 | 57,000 | 350 |
R-14
| Tetrafluoromethane (carbon tetrafluoride) | CF4 | 15 | 67,000 | 240 |
R-22
| Chlorodifluoromethane | CHClF2 | 9.4 | 42,000 | 150 |
R-113
| Trichlorotrifluoromethane | CCl2FCCIF2 | 1.9 | 4,000 | 31 |
R-114
| Dichlorotetrafluoroethane | CClF2CCIF2 | 9.4 | 21,000 | 150 |
R-123
| 2,2-dichloro-1,1,1-trifluoroethane
| CHCl2CF3 | 0.4 | 1,000 | 6.3 |
R-134a
| 1,1,1,2-tetrafluoroethane
| CH2FCF3 | 16 | 60,000 | 250 |
R-400
| R-12 and R-114
| CCI2F2/C2CI2F4 | d
| d
| d
|
R-500
| R-12/152a (73.8/26.2) | CCI2F2/CH3CHF2 | 12 | 47,000 | 200 |
R-502
| R-22/115 (48.8/51.2) | CHCIF2/CCIF2CF3 | 19 | 65,000 | 300 |
R-503
| R-23/13(40.1/59.9) | CHF3/CCIF3 | 15 | 67,000 | 240 |
R-718
| Water | H2O | f
| f
| f
|
R-744
| Carbon Dioxide | CO2 | 5.7 | 50,000 | 91 |
Group A2 | |||||
R-142b
| 1-Chloro-1,1,-Difluoroethane | CH3CCIF2 | 3.7 | 14,000 | 60 |
R-152a
| 1,1-Difluoroethane
| CH3CHF2 | 1.2 | 7,000 | 20 |
Group A3 | |||||
R-170
| Ethane | C2H6 | 0.50 | 6,400 | 8.0 |
R-290
| Propane | C3H8 | 0.50 | 4,400 | 8.0 |
R-600
| Butane | C4H10 | 0.51 | 3,400 | 8.2 |
R-600a
| 2-Methyl propane (Isobutane) | CH(CH3)3 | 0.51 | 3,400 | 8.2 |
R-1150
| Ethene (Ethylene) | C2H4 | 0.38 | 5,200 | 6.0 |
R-1270
| Propene (Propylene) | C3H6 | 0.37 | 3,400 | 5.9 |
Group B1 | |||||
R-123
| 2,2-Dichloro-1,1,1-Trifluoroethane | CHCI2CF3 | 0.40 | 1,000 | 6.3 |
R-764 | Sulfur Dioxide | SO2 | 0.016 | 100 | 0.26 |
Group B2 | |||||
R-40
| Chloromethane (Methyl Chloride) | CH3CI | 1.3 | 10,000 | 21 |
R-611
| Methyl Formate | HCOOCH3 | 0.78 | 5,000 | 12 |
R-717
| Ammonia | NH3 | 0.022 | 500 | 0.35 |
a The refrigerant safety groups in Table 1 are not part of ASHRAE Standard 15. The classifications shown are from ASHRAE Standard 34, which governs in the event of a difference.
b To be used only in conjunction with Section 7.
c To correct for height, H(ft), above sea level, multiply these values by (1 - 2.42 x 1
0-6
H). To correct for height, H(km), above sea level, multiply these values by (1 - 7.94 x 1
0-2
h).
d The quantity of each component shall comply with the limits set in Table 1 for the pure compound, and the total volume % of all components shall be calculated per Appendix A (not to exceed 67,000 ppm by volume for any refrigerant blend).
e The basis of the table quantities is a single event where a complete discharge of any refrigerant system into the occupied space occurs. The quantity of refrigerant is the most restrictive of a minimum oxygen concentration of 19.5% or as follows:
Group 1 – 80% of the cardiac sensitization level for R-11, R-12, R-13B1, R-22, R-113, R-114, R-134a, R-500, and R-502. 100% of the IDLH(21) for R-744. Others are limited by levels where oxygen deprivation begins to occur.
Group A2, A3 – Approximately 20% of LFL.
Group B1 – 100% of IDLH for R-764, and 100% the measure consistent with the IDLH for R-123.
Groups B2, B3 – 100% of IDLH or 20% of LFL, whichever is lower.
f The quantity is unlimited when R-718 (water) is used as the refrigerant.