Energy Compliant Cafés & Kitchenettes
USGBC Heaquarters uses Convia to Manage Energy Use in Public Spaces
Ambient Lighting
Lighting Energy Use
Lighting Use Throughout Day
What’s next?
Ambient Lighting & Wall Washing
Wall Switches: During the day, the wall switch must be turned on manually to encourage users to keep the lights turned off when there is enough daylight. Turning the lights on activates daylight dimming to provide the right amount of light. For those who might need more light, the daylight dimming can be overridden by pushing and holding the top button on the switch.
Daylight Dimming: When daylight dimming is active, the dimmers respond to input from a photo sensor to maintain 25 footcandles in the Cafe.
Occupancy Sensors: The occupancy sensors are programmed to respond differently at night than during the day. During daylight hours, the lights must be turned on manually to encourage more energy savings, yet turn off automatically after people leave the space. At night, the lights turn on automatically to illuminate the space.
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 a Kitchenette 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 footcandles on the in the Café.
» Download the full USGBC case study
Lighting Energy Use
- ASHRAE 90.1 204 Allows: 0.9 W/SF
- Installed Lighting Power Density: 0.51 W/SF (44% below ASHRAE)
- Kitchen/Café Square Footage: 1,950 SF
- Connected Lighting Load: 1,000 Watts
- Predicted Annual Lighting Energy: (Both Baseline & Convia are based on installed lighting loads.)
- Baseline Controls: 2,250 kWh/hr (Assumes occupancy sensors with Auto-On/Auto-Off control)
- Convia Controls: 450 kWh/yr (80% below Baseline Controls)
» Download the full USGBC case study
Lighting Use Throughout the Day
» Download the full USGBC case study
What’s next?
