Patrick Henry Office Building
The Patrick Henry Building is a ten story building of stone and glass construction. The building was built in 1939 as a Public Works Administration project and was originally designed for the State Library and Supreme Court of Virginia. In 2005 the building was renovated.
The energy use index of the building is 78 kBtu/sf/year, which is about average for buildings in Washington DC. EE&D engineers identified 8 Low Cost / No Cost Measures and 6 Capital Improvement Measures. The total installed cost was estimated at $599,750 with energy cost savings of $405,503 for a simple payback of 1.48 years.
The $32 million renovation included replacing all the building systems; repairing the exterior masonry; installing new elevators, windows, and roof; waterproofing and installing new fire alarms, sprinkler systems, and bathrooms; providing entrances and other features accessible to the disabled; and preserving and restoring the old Supreme Court Chamber, entrance lobbies, and the library’s former grand reading rooms. The oak walls in the lobby, 80 original light fixtures, the terrazzo-lined floor, the granite on the walls in the entranceways, and the American walnut inlaid with ebony in the Supreme Court room were all preserved and restored.
The Building has a central plant with (4) Chillers. Chiller # 1 & # 2 supply chilled water to floors 10 through 4. Chiller # 3 & # 4 supply chilled water to floors 3 through Lower Level.
The facility has 73 water cooled condensing water cooled heat pumps that are installed in the conference rooms and IT closets to provide supplemental cooling. These units have been added to provide additional cooling for areas where the main air handling system was not providing adequate cooling and to serve special concentrated loads.
The heating and ventilation for each floor is provided through variable air volume air handling units. The units distribute air through a ducted supply air system to terminal boxes located within the occupied spaces. The terminal boxes are controlled through dedicated thermostats. All heating for the facility is provided through the electric reheat installed within the perimeter terminal boxes
The Building is equipped with a Building Automation System with insight graphics. This system allows you to set schedules, program equipment and control set points for temperatures and starting and stopping equipment. 100% of all the central plant and air handling is controlled by the automation system.