WAC 51-52-1106. Section 1106 — Machinery room, special requirements

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 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