NES Digital Garage Ventilation Control System Achieves 97% Energy Savings

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Installation at New, Mixed-use Development Generates More Than $102,500 In Annual Savings

The NES garage ventilation control system significantly reduces energy consumption by increasing operational efficiencies

Nagle Energy Solutions (NES) today announced its digital garage ventilation control system is enabling the developer of a newly constructed, mixed-use neighborhood in the heart of Silicon Valley to limit the energy consumed by its sizable garage ventilation system to just 2.6% of its full-load capacity, consequently reducing kilowatt-hour (kWh) consumption and peak kilowatt (kW) demand by 97.4%.

“The NES system more than surpassed our expectations,” said Mike Rohde of Sand Hill Property Company, the developer, owner and manager of the Main Street Cupertino development in Cupertino, CA. “It limits our annual utility expenses considerably while ensuring the health and safety of those folks who rely on the garage on a daily basis.”

Detailed calculations during the construction phase of the development's stand-alone, 1,370-space garage revealed that, with no means of control in place and running on a 24/7 basis, the garage ventilation system would consume approximately 527,000 kWh per year, with a correlating peak kW demand greater than 60 kW. At a utility rate of $0.205/kWh, Sand Hill Property’s annual cost to ventilate the garage would amount to slightly more than $108,000 (or $9,000 per month).

The NES garage ventilation control system provides the capability to monitor and report on energy consumption on a real-time basis. Comprehensive post-installation data logging shows that, with the innovative NES system controlling continuous (24/7) ventilation of the garage, annual kWh consumption and peak kW demand are reduced by 500,600 kWh and 58.6 kW, respectively.

As a result, Sand Hill Property’s annual utility fees for ventilating the garage are limited to approximately $5,400, the equivalent of reducing energy costs by $102,600 a year (or by $8,550 per month).

Based on a total installation and commissioning cost of roughly $117,200, the NES system’s net present value (NPV) exceeds $1.18 million, and it pays for itself in just 13.7 months. The NES system will provide minimum cash inflow (from the savings it generates) exceeding $1.4 million throughout its 15-year lifespan.

“To be sure, investing in the NES system was money well spent,” noted Mr. Rohde.

The Main Street Cupertino development ( provides loft-style apartments, a business-oriented hotel, Class A office space, top-rated restaurants, cafés and boutiques.

NES installed its TR50 system in the Main Street Cupertino garage. The NES TR50 system incorporates a Tridium JACE controller with a Niagara programming framework, and it integrates a web server that enables building owners/managers/chief engineers to conduct system status checks and adjust operational parameters from their desktops – or from their laptops anywhere in the world.

About Nagle Energy Solutions: Based in Menlo Park, CA, Nagle Energy Solutions, LLC develops, manufactures, distributes and installs an innovative demand-control ventilation (DCV) system for commercial garages that dramatically reduces energy consumption, increases operational efficiencies and ensures adherence to strict health and safety standards – all while leaving your garage fan motors running.

NES digital controllers and peripherals are scalable and conform to several building management system (BMS) and energy management system (EMS) communication platforms, as well as monitor / report on energy consumption/savings.

NES sales and service capabilities extend nationally.

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Francis Nagle
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