Energy Systems Group Will Reduce Carbon Footprint of Major Florida Airport

ORLANDO, FL--(Marketwire - April 3, 2008) - Over 1,750,000 annual passengers traveling through Orlando Sanford International Airport (SFB) will soon benefit from facility enhancements at this state-of-the-art airport. Energy Systems Group (ESG) has partnered with TBI Airport Management, Inc. in a 10-year $3.375 million energy savings contract for key energy conservation and facility upgrades throughout SFB.

Underlining the Sanford Airport Authority's green environmental initiatives, the project implemented by Energy Systems Group will reduce the airport's carbon footprint through a 35% reduction of carbon emissions produced by the existing electrical usage at SFB. In addition, water consumption will be reduced by about 982,000 gallons per year. ESG's initiatives will provide the airport with over $4.7 million in energy and operational savings over the 10-year agreement.

"The environment and resource conservation have been at the forefront of our company's agenda for quite some time," commented Larry Gouldthorpe, President of TBI Airport Management, Inc. at Orlando Sanford. "Working with the airport authority's own initiatives and ESG's expertise makes this partnership a rewarding first step in an enduring purpose."

ESG will implement the following facility and energy efficiency improvements at SFB:

--  Three new high efficiency chillers to reduce energy consumption,
    improve facility comfort, and extend the overall life of the facility's air
    conditioning system.
    
--  A new, modern energy management system capable of providing demand
    control ventilation based on temperature and humidity, which will
    significantly reduce the airport's operating cost.
    
--  A new high efficiency lighting system with occupancy sensors plus
    conversion of all traffic and pedestrian control signals to Light Emitting
    Diode technology (LEDs). Daylight harvesting strategies will also be
    implemented in the vast open areas of the terminal to use natural sunlight
    for a majority of lighting required during the day.
    
--  New automatic flush valves on all toilet fixtures with a self
    generating power supply that eliminates the need for monthly battery
    replacement which reduces maintenance expenses and the quantity of alkaline
    batteries going to landfills.
    

"It is great to work with a customer who is concerned about reducing their impact on the environment, and is also able to add value for their shareholders with these costs savings strategies," commented Jeffrey Merdich, ESG Account Executive.

According to Sanford Airport Authority President and CEO, Larry Dale, "The long-awaited implementation of our energy conservation program is the result of many months of planning by both Airport management and ESG. Without a doubt, these improvements will dynamically impact our ongoing efforts to safeguard the environment, conserve resources wherever practical, and prudently manage the costs of running an international airport."

Energy Systems Group is an award-winning energy solutions and performance contracting company that provides innovative and self-funding solutions to improve the efficiency, operation and finances of facility owners. ESG delivers these improvements from offices in Evansville, Clearwater, Atlanta, Baltimore, Chicago, Indianapolis, Johnson City, Lansing, Little Rock, Louisville, Nashville, Raleigh, Richmond, and St. Louis. To learn more about Energy Systems Group, visit their website at www.energysystemsgroup.com. ESG is a wholly owned subsidiary of Vectren Corporation (NYSE: VVC).

Orlando Sanford International Airport (SFB) is situated on approximately 2,000 acres in the northwestern section of Seminole County, Florida, 18 miles northeast of Orlando. SFB provides its customers with convenient, state-of-the-art facilities and excellent highway access to Florida's renowned beaches and all Orlando area attractions. Orlando Sanford International Airport is operated through a public/private partnership between the Sanford Airport Authority and TBI Airport Management, Inc.

TBI Airport Management, Inc. has been contracted by the Sanford Airport Authority to manage both the international and domestic terminals, develop additional air service, and provide ground handling and cargo services. This public/private partnership has created an environment with valuable service benefits for SFB customers and passengers.

Contact Information: Contact Information: Meram El Ramahi Marketing Communications Manager Energy Systems Group (812) 492-3734