The EPS shall be installed in a separate room for Level 1 installations. The room in which the generator is located must have a two-hour fire resistance rating. transfer switches, circuit breakers . Complete guide to NFPA 37 requirements for commercial generator installations including room ventilation, exhaust systems, clearance distances, noise compliance, and permitting. It creates fire hazards, exhaust. Proper ventilation is not just a best practice but a requirement under the National Fire Protection Association's (NFPA) Standard 110, which governs emergency and standby power systems. NFPA 110 allows, but does not require that, the EPSS equipment (e. transfer switches, circuit breakers, etc.