This edition analyzes the cost and performance of heating and ventilating plants, explains a practical classification scheme for equipment, and discusses how standards for air, temperature, and humidity influence daily comfort in occupied classrooms. It highlights how decisions about equipment, space, and funding impact results in real schools.

Learn how costs are measured per cubic foot of space and how different system classes compare
See how a simple classification (Classes A–E) guides design and budgeting choices
Understand the role of temperature, humidity, and air movement in effective ventilation
Explore factors that affect performance, maintenance, and operating costs in school buildings

Ideal for readers involved in school design, facilities management, or building maintenance who want a practical view of how ventilation and heating choices affect health and cost.

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