Private Office Solutions
US Green Building Council Energy Strategies
Task Light & Controlled Plug Loads
Ambient Lighting
Nighttime Operation
Lighting Energy Use
Power Use Throughout Day
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Task Light & Controlled Plug Loads
Each Private Office has a controlled outlet and a non-controlled outlet. Task lights, laptop
computers, and other personal electronics can be plugged into the controlled outlet that
will automatically turn off when the occupancy sensors time-out in each Private Office. The
task lights also have an on-board switch to allow local control for each workstation.
» Download the full USGBC case study
Ambient Lighting
Daytime Operation: (Activated at 30 minutes after sunrise). During the day, the Ambient
Lighting must be turned on manually using the switch located on a nearby column. This
manual operation is to encourage users to keep the ambient lighting turned off if there
is enough daylight in the space. Each switch has two buttons, and each button has two
functions.
Wall Switches
Click Once: Turns Lights On & Activates Daylight Dimming
Push & Hold: Brightens Lights & Disables Daylight Dimming
Click Once: Turns Lights Off
Push & Hold: Dims Lights & Disables Daylight Dimming
Occupancy Sensors
When an Open Office Area has been vacated for a certain time period, the lights will turn off automatically.
Day: Manual-On/Auto-Off
Night: Auto-On/Auto-Off
Daylight Dimming
When daylight dimming is activated, the dimmers respond to input from a photo sensor to maintain
25 foot candles on the desk tops.
» Download the full USGBC case study
Nighttime Operation
(Activated at 30 minutes before sunset.) At night, the Ambient
Lighting in Private Offices is still turned on manually. Once a person settles into their
Private Office, the occupancy sensors in their office will maintain a low level of lighting in
an adjacent Open Office. This provides a more comfortable setting for working at night
than localized occupancy sensors only that would leave the surrounding areas dark.
» Download the full USGBC case study
Lighting Energy Use
- ASHRAE 90.1 2004 Allows: 1.10 W/SF
- Installed Lighting Power Density: 0.53 W/SF
- Private Office Square Footage: 12,200 SF
- Connected Lighting Load: 6,500 Watts
- Predicted Annual Lighting Energy: (Both Baseline & Convia are based on installed lighting loads)
- Baseline Controls: 14,700 kWh/yr (Assumes occupancy sensors with auto-on/auto-off control)
- Convia Controls: 7,200 hWh/yr (49% below Baseline Controls)
» Download the full USGBC case study
Power Use Throughout the Day
» Download the full USGBC case study
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