Page 23 - School Planning & Management, April 2017

Maintaining healthy IAQ will make it possible to manage a building’s operating costs more effectively and, in some cases, actually reduce those costs.
An IAQ Plan in Action
The Wentworth Intermediate School in Scarborough, Maine, has implemented an IAQ program developed by Harriman.
Throughout the school, ventilation needs vary for different spaces. Ventilation needs, of course, depend on how different spaces are used, the number of people using the space and the square footage of the space.
Fourteen custom modular indoor air handing units provide ventilation at Wentworth. Each unit can deliver 100 percent outdoor air.
To raise the level of ventilation effectiveness, fresh laminar air enters the rooms low, from the base of the walls. Heat produced by
occupants and equipment rises up and creates a natural plume of used air that returns to the air handler.
A portion of the air is exhausted to the outside by the air handler and replaced with fresh air. Discharge air temperature for a displacement system is lower in the winter and higher in the summer. Managing a displacement system carefully can reduce the energy needed to heat or cool the air.
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APRIL 2017 / SCHOOL PLANNING & MANAGE3M/3/E17NT12:482P3M