NFPA 1031 Fire Inspector 1 Practice Test

The system that maintains indoor temperature and humidity is HVAC. Heating, Ventilation, and Air Conditioning together condition the air: heating adds warmth, cooling lowers it, and ventilation exchanges air to control moisture and air quality. Humidification and dehumidification are parts of this system as needed. Electric, plumbing, and fire alarm serve different functions—electric for power, plumbing for water and waste, and fire alarm for detection and notification—so they aren’t the category used for climate control.