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EPA Comments

From the EPA’s website: “Heating, Ventilation and Air-Conditioning Systems, Part of Indoor Air Quality Design Tools for Schools”

The EPA comments on the suggestions for “Types of Air Distribution” as shown below:

Types of Air Distribution

Nearly all schools currently use the mixed-airflow method for the distribution and dilution of the air within the occupied space. Designers should investigate a method called vertical displacement ventilation or thermal displacement ventilation. This approach successfully uses natural convection forces to reduce fan energy and carefully lift air contaminants up and away from the breathing zone.


Net Zero NYC School

“For indoor climate control, the team opted for a dedicated outdoor air system with energy recovery and demand control ventilation. In the classrooms, perimeter displacement induction units supply conditioned air at a low velocity, which makes the devices both efficient and quiet”

From “”

“Indoor Air Quality Enhanced Ventilation – 30% more OA than ASHRAE 62.1 provided to space. MERV 13 filtration on all systems, CO2/particulate sensors in all rooms to control OA volume delivered. All outside air is pre-treated by energy recovery ventilators; demand control ventilation and displacement induction units delivering the air to all classrooms further reduce energy use.” “As school buildings in New York City represent one of the largest contributors to greenhouse emissions for municipally owned buildings, the reduction in energy use represented by P.S. 62R sets a standard for the potential of the City’s schools to influence positively the municipal carbon footprint. As a case in point, the primary HVAC design component, displacement induction units in the classrooms,…”

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