Axiom Engineers: Commissioning

CARNEGIE LIBRARY, EAST SAN JOSE, CA / Design Bid Build - Commissioning

This LEED for New Construction expanded the historical library with a major addition attached to the existing building. The ventilation system utilized wall diffusers and crawlspace duct to maximize the interior design open space.

Commissioning services verified numerous control strategies employed in this building. Control strategies commissioned included demand control ventilation, crawlspace air management, and dual duct variable air volume systems. Numerous control issues were discovered and resolved due to the commissioning services that ensured occupant comfort and safety. System adjustments were made during the commissioning process to affect adequate & efficient air delivery.

East San Jose Carnegie Library is LEED certified to the Silver Level.

Project Features

• 11,700 sq. ft.
• 15 dual duct variable air volume boxes
• Crawlspace exhaust fan and control dampers to control cold deck inlet air temperature
• Numerous control strategies including:
- demand control ventilation
- terminal box discharge temperature
- crawlspace air flow management
- duct static pressure
• Advanced trending and energy efficiency monitoring control system

Project Accomplishments

• Corrected economizer control for efficient mechanical cooling system use
• Corrected cold deck air handler fan speed to provide adequate building air flows
• Simplified dual duct variable air volume box heating sequence of operation
• Discovered incorrect heating air handler filter arrangement
• Verified correct duct static pressure control response through remote access