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ENERGY STAR Labeled Building Profile

Four Oaks Place (1300 Post Oak)
1300 Post Oak
Houston, TX 77056
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1300 Post Oak Boulevard, a building located in Houston, Texas, is a 25-story, multi-tenant property and is one of four buildings in complex called Four Oaks Place. The property has been managed and leased by Transwestern since 2004. The Transwestern staff members, working together with TIAA-CREF, earned ENERGY STAR recongnition with an initial energy performance score of 94. The building and now has a score of 97. The facility has experienced many changes that have improved its energy performance.


A lighting retrofit began in 2001 and was completed in 2002, in which all of the fluorescent lighting was converted from T12 to Sylvania Octron Ecologic T8 fluorescent lamps. In addition, energy efficient electronic ballasts and fluorescent down lights were installed throughout the property.


The building?s management has also upgraded the energy management control system to perform supply-air reset on the air handling units.


Between 2000 and 2009, variable speed drives were installed on air handling units. Based on actual metered data, it is estimated that each variable speed drive saves 9,000 kilowatt hours per year.


In 2001, the City of Houston passed an energy ordinance that applied to new construction of office space, primarily the installation of motion detectors for lighting in all offices. This ordinance has contributed to remodeling and energy reductions at Four Oaks Place.


In 2007, variable frequency drives were installed on the secondary chilled water pumps, thereby controlling differential pressure in the system by varying the pump speed.


Another project-wide lighting retrofit was done in 2007, in which the Sylvania Octron Ecologic T8 fluorescent lamps were replaced with Philips Energy Advantage T8 Lamps ALTO? 25-watt Lamp Technology. Re-commissioning of the building lighting in 2007 resulted in a project-wide savings of an estimated 2,000,000 kWh per year in electrical energy consumption.


Re-commissioning of HVAC systems are conducted after build outs or remodels.


Variable frequency drives were added to the four cooling tower fans between 2010 and 2011.


A program to retrofit pneumatic Variable Air Volume controls to Direct Digital Controls is currently underway.






Please note: Narrative information in this profile has been provided by FOUR OAKS PLACE or a representative of this facility. Other building information was verified and submitted to EPA at the time of application. Building energy performance, operating characteristics, and ownership/management may be subject to change over time.

Building Owner:*

Property Manager:*

Year(s) Labeled (Rating):
2004 (92)
2005 (92)
2006 (92)
2007 (96)
2008 (98)
2009 (99)
2010 (97)
2011 (98)
2012 (98)
2013 (95)

Facility Type: Office

Total Floorspace: 529000 sf

Year Constructed: 1983

Contract Type: None

Technologies Used:
   Stage 1-Recommissioning
   Stage 3-Load Reductions
   Stage 4-Fan Systems
   Stage 5-Heating and Cooling Plant
   Other Technologies/Strategies

For More Info:
DeWayne Ingleburger
Building Engineer
Houston, TX 77056