In the warm, humid climate of southeast Louisiana, schools like LaRose-Cut Off Middle School can’t simply turn off their HVAC equipment to save energy and lower utility costs when school is not in session—doing so would invite mold and mildew to take over the building. And when school is in session, a comfortable atmosphere is essential to a good learning environment. Building codes further mandate that fresh air be available to the school’s more than 500 sixth to eighth graders plus teachers and staff. Therefore, the school district sought a reliable, economical, quiet and easily maintained way to cool the classrooms at LaRose-Cut Off.
Castagnos-Goodwin designed a fan coil system for the school district that tapped off an existing system in an adjacent building, incorporating IEC Modular Hi-Rise Series MXY and Hi-Performance Series HXY fan coil units. By using autoflows and three-way valves, Castagnos-Goodwin essentially turned a single circuit coil into a two-stage coil. When temperatures rise above 72° F, an additional valve opens in the coil, allowing for greater GPM. Each classroom has its own thermostat, enabling each teacher to control his or her individual environment. This plus the unit’s quiet operation creates staff satisfaction, while a range stop on the thermostats prevents excessive cooling and its attendant costs.
The simplicity of the fan coil system enables school district maintenance staff to service the units themselves, avoiding costly technician visits, and allowing staff members to replace filter media and change worn parts. Also, in the event that a fan coil unit is disabled for servicing, only the immediate environment is impacted. The rest of the classrooms continue to function normally, preserving school-wide comfort.
“I requested that IEC modify the fan coil units with a service grille so the school maintenance staff doesn’t have to take the front panel off to change the filter media. I also sent a wiring diagram for the thermostats and they came back with the diagram inside the door so anyone can install them. Every time I’ve asked IEC for special engineering, they’ve done it!”
—Robert Utley, Senior Mechanical Engineer, Castagnos-Goodwin