Why should ventilating systems for toilets be separate from the building's main ventilating system?

• A. To reduce noise from the toilet area
• B. To improve air quality in living spaces
• C. Because the requirements of the two systems differ
• D. To ensure easier maintenance of toilet facilities

Answer: (C)

Ventilating systems for toilets need to be separate from a building's main ventilating system primarily because the requirements of the two systems differ significantly. Toilets produce unique moisture and odor challenges that are not present in living areas. Thus, the ventilation for toilet facilities should address these specific conditions without affecting the overall air quality of the building's main living spaces.

By utilizing a separate system, it's possible to design ventilation that effectively removes odors and excess moisture from the toilet area without drawing potentially contaminated air into the primary living areas. This separation helps maintain a more hygienic environment in the rest of the building, improving overall air quality.

In contrast, while factors such as noise reduction or maintenance ease are considerations, they do not address the fundamental reason for needing distinct ventilating systems tailored to the different environmental conditions and purposes of each space.