High-rise wins energy contest with HVAC control upgrades
Main lobby of 3200 N. Central Avenue
A series of upgrades to a 1986 Phoenix high rise led to award-winning energy savings of 160,000 kilowatt-hours per year.
Location at 3200 N. Central Avenue, the 24-story, 345,000 square-foot building achieved the highest Energy Star score of 98 in the Phoenix Building Owners and Managers Association Green Building Committee Kilowatt Krackdown contest.
Energy savings came from an array of enhancements and technology upgrades, including a Using SMARTPneumatics to complete a significant variable air volume (VAV) retro-commissioning that included repairs to air leaks in the pneumatic system, re-calibration, and actuators for improved airflow correction.
The SMARTPneumatics from Cypress Envirosystems delivers reports based on IoT data from the Wireless Pneumatic Thermostat system that automatically identifies how each HVAC zone is performing. All 400 zones in the building were prioritized from the worst to best performing zones, so technicians could focus where it was most important, thus saving maintenance costs.
"Buildings with old-style pneumatic thermostats have no data or visibility, which means it's harder to maintain a building and it will underperform," said Harry Sim, CEO of Cypress Envirosystems. "When customers use SMARTPneumatics, they gain the visibility needed to achieve top Energy Star ratings and maintain that performance over time."
These ongoing IoT generated reports give the technicians the root cause of any underperformance, so they know exactly what to fix.
Tim Rose, executive vice president of DPC Companies, owners of the building, agreed with the need for SMARTPneumatics technology.
"Before the retro-commission, our heating and cooling expenses for the existing building were substantially higher than what we felt they should be running for a building of this size and age," he said. "That, combined with numerous tenant complaints about cooling issues throughout the year, and the resulting tenant-comfort work order requests, made it clear to us that we needed to improve the building's HVAC. We are very pleased with the upgrade, and most importantly our tenants couldn't be more satisfied. The new controls were solely responsible for reducing the tenant cooling requests from an average of 25 to 30 calls per day when we purchased the building to approximately three to five per week."
Other upgrades included:
- Two 50 HP, high-efficiency motors were installed for the condensing loop and one VFD was added to a motor.
- During the main lobby remodel, new 12-watt LED floodlights were installed which replaced 50-100 watt incandescent fixtures.
- The exterior landscape remodel added 30 10-watt LED fixtures and lamps outside, replacing 50-watt halogens.
- Timers installed for all drinking fountains.