Mt. Diablo Plaza

Walnut Creek

Mt. Diablo Plaza

The Property

A Class A office complex owned by Rreef Property and managed by CB Richard Ellis (CBRE), Mt. Diablo Plaza is located in Walnut Creek's Central Business District.

The property houses a three-level, 300,000 square-foot parking garage, with nine (9) axial fan exhaust fans totaling 50 HP dispersed throughout.

The Savings Challenge

California's Title 24 requires below-grade garages in commercial properties ventilate continuously during business hours. This required property management to more than quadruple the garage fan runtimes – from 2.8 hours a day to 12 hours per day. This in turn required NES to find a way to minimize the bill of material (BOM) while further reducing an already de minimis baseline of energy consumption.

Mt. Diablo Plaza

The NES Solution

Our project design called for a Tridium JACE-controlled system. The Tridium JACE system enabled us to more than quadruple the garage fan runtimes while significantly enhancing operational functionality of the garage ventilation system. Its Web-based interface enables the chief engineer and his staff to remotely set and manage the garage ventilation system’s operating parameters, as well as trend energy consumption on a real-time basis.

Project Highlights

Tridium JACE-Controlled System Achieves a 96.6% Savings in Peak kW Demand

The Results

Post-installation energy consumption monitoring via the VFDs showed our garage DCV system reduced the garage fan motors’ combined kWh consumption by more than 24,000 kWh a year – an 89.2% savings. Peak kW demand was reduced by 33.0 kW, which equates to a 96.6% savings.


How Can We Help?

Frank Nagle
(415) 378-5560

About Nagle Energy Solutions (NES)

Nagle Energy Solutions, LLC is a manufacturer, distributor and installer of an innovative demand-control ventilation (DCV) system for commercial garages that reduces energy consumption in the range of 95% – with quantifiable savings as high as 97% achieved – all while leaving your garage fan motors running.

Our sales and service capabilities extend nationally and internationally.

Nagle Energy