Wash. Admin. Code § 51-52-1106
1106.4.2 Emergency ventilation system. An emergency ventilation system shall be provided at the minimum exhaust rate specified in ASHRAE 15 or Table 1106.4.2. Shutdown of the emergency ventilation system shall be by manual means.
Table 1106.4.2
MINIMUM EXHAUST RATES
| Refrigerant | Q(m/sec) | Q(cfm) |
| R32 | 15.4 | 32,600 |
| R143A | 13.6 | 28,700 |
| R444A | 6.46 | 13,700 |
| R444B | 10.6 | 22,400 |
| R445A | 7.83 | 16,600 |
| R446A | 23.9 | 50,700 |
| R447A | 23.8 | 50,400 |
| R451A | 7.04 | 15,000 |
| R451B | 7.05 | 15,000 |
| R1234yf | 7.80 | 16,600 |
| R1234ze(E) | 5.92 | 12,600 |
[Statutory Authority: RCW 19.27.031 and 19.27.074. WSR 23-23-105, § 51-52-1106, filed 11/15/23, effective 3/16/24; WSR 20-03-041, § 51-52-1106, filed 1/8/20, effective 7/1/20.]