Final answer:
A neutral pressure area is a space that is not actively ventilated by an electrical ventilation system and has the same pressure as the atmosphere. Examples include rooms that rely on natural ventilation through windows or doors.
Step-by-step explanation:
A space that is not actively ventilated by an electrical ventilation system is known as a neutral pressure area. In this type of space, the pressure is equal to the atmospheric pressure, and there is no significant difference in pressure between the inside and outside of the space. Examples of neutral pressure areas include rooms or buildings that rely on natural ventilation through windows or doors rather than mechanical ventilation systems.