In the ceiling zones method of ceiling distribution, divide the usable floor area into zones of how many square feet?

Question

Options

• A2000 to 2500 square feet.
• B2500 to 3000 square feet.
• C365 to 900 square feet.
• D1000 to 2000 square feet.

• A
  14% (5)
• B
  3% (1)
• C
  75% (27)
• D
  8% (3)

Explanation

Option C (365 to 900 square feet) is correct because the ceiling zones method is specifically designed to work with relatively small, manageable zones that allow for precise control of air distribution - zone sizes in this range reflect the granular approach required for effective ceiling-level air delivery.

Options A (2000–2500 sq ft), B (2500–3000 sq ft), and D (1000–2000 sq ft) are all too large. Zones that big would be impractical for the ceiling zones method, which relies on dividing space into smaller sections to ensure even, controlled distribution from ceiling diffusers or outlets - oversized zones would undermine that precision.

Memory tip: Think "small room, small zone." 365–900 sq ft is roughly the footprint of a studio apartment or a modest office - the kind of self-contained space that makes intuitive sense as a single ceiling distribution zone. If the answer choices feel overwhelming, eliminate anything over 1000 sq ft since the method is built around fine-grained zoning.

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