The top needs for a school environment are fresh incoming air, low cost to operate, easy to maintain, low sound interference, and comfort for the occupants. Studies have shown that CO2 in the air can cause a person to have decreased neural activity. The AAON DDC economizer and energy recovery wheel options allow for fresh air to enter the building at a lower cost to operate. AAON equipment is designed with durable double-wall foam cabinets and isolated controls and compressor compartments for ease of maintenance. AAON equipment has the solutions for school HVAC!