Building Energy Codes: Title 24

Title 24 is California’s code of building energy efficiency standards. Effective July 1, 2014, new regulations will impact all newly constructed or altered commercial buildings.

 

ControlScope brings control of lighting, plug load, and HVAC systems under a single, unified platform and enables access to the Internet for Smart Grid integration. With flexibility to implement more than one control strategy to comply with each Title 24* requirement, ControlScope ensures easy compliance.

 

Code requirements include:


Demand Responsive Lighting Controls

All non-residential buildings over 10,000 square feet will have automated demand response capabilities in lighting systems. This lighting system must be capable of receiving and automatically responding to standards-based messaging protocols, such as OpenADR, to reduce lighting power by at least 15% below the building’s maximum lighting power during peak demand times.

 

How We Can Help:

Automated demand response capability is designed into ControlScope, eliminating the need for a separate automated DR system. An OpenADR certified solution, ControlScope provides the ability to use lighting, HVAC and plug load control strategies to respond automatically to an OpenADR event, ensuring easy compliance. Daintree Networks works directly with utilities in California to ensure ControlScope is directly applicable for their incentive programs.Contact us for more information.


Plug Load Circuit Controls

Controlled 120-volt receptacles are required in all buildings. For each uncontrolled outlet, a controlled outlet within 6 feet needs to be provided. Or, use split wired duplex receptacles, with on uncontrolled and one controlled. This applies in spaces such as private office, open office area, reception and lobby, conference room, kitchenette in office spaces, and copy room. The controlled receptacles must automatically shut off plug loads when the area is not occupied using one of the methods available in indoor lighting.

 

How We Can Help:

With ControlScope, the same automatic shut off lighting control strategy required in 2013 Title 24 for general lighting can be applied to task lighting and plug loads. Adding plug load control to ControlScope’s network infrastructure is as simple as plugging in ControlScope compatible plug load controllers (such as from SafePlug) at receptacles on an office wall and determining which receptacle is controlled or uncontrolled. This simple installation enables all devices plugged into the controlled receptacles to shut off using the same lighting strategy for shutting off lights when spaces are unoccupied. Contact us for more information.


Automatic Shutoff

All lighting in buildings must be shut off with one or more of the available controls:

  • Occupant sensing control
  • Automatic time-switch control
  • Signal from another building system
  • Other control capable of automatically shutting OFF all of the lights

Control will be separately implemented in each area less than 5,000 square feet, and on each floor. When using occupant sensing controls, the lighting can remain ON for no more than 2 hours when an override is initiated. When using automatic time-switch controls, all lighting loads must be shut-off for at least 24 hours during the holidays.

 

How We Can Help:

ControlScope provides the flexibility to implement automatic shutoff controls using both occupant sensing and a time-switch. The cost advantage of using occupant sensing control with ControlScope is that the same occupancy sensor used to control the lighting in a zone can also control the plug loads and the HVAC system in the same zone. In addition, ControlScope provides a BACnet interface to enable controls from other systems. Contact us for more information.


Multi-Level Lighting Controls

Any enclosed space larger than 100 square feet that has a connected general lighting load greater than 0.5 W/ square foot must have controls to reduce lighting power by dimming while maintaining a uniform level of illuminance.

Each luminaire in the space must be controlled by at least one of five methods: Manual dimming, lumen maintenance, tuning, automatic daylighting control, and demand responsive lighting control.

 

How We Can Help:

With ControlScope, customers can choose one or more of the required methods for reducing each luminaire’s lighting power with continuous dimming.The flexibility to use one or more methods to reduce lighting power provides customers more choice in meeting the needs of their occupants.Contact us for more information.


Automatic Daylighting

Luminaires providing general lighting that are in the Skylit Zones must be controlled to automatically adjust lighting levels (using photosensors) through multi-level or dimming control.

 

How We Can Help:

The advantage of using a wireless solution, such as ControlScope, is that wireless mesh networking provides the flexibility to allow luminaires to be dimmed in different zones at different times and rates, and to different levels. ControlScope, for example, enables daylighting only for the first one or two banks of luminaires next to windows. The bank immediately next to the window, which receives the greatest amount of natural light, would be dimmed by the greatest amount, with dimming levels gradually reduce as you move away from the window. Contact us for more information.


Area Lighting Controls

Each space enclosed by ceiling-height partitions requires a manual switch or dimmer switch (if controlling dimmable luminaires) in the same area that allows manual ON and OFF lighting controls. The switch must be readily accessible to occupants, and its control functionality cannot be overridden by other lighting controls.

 

How We Can help:

Daintree’s wireless wall dimmer product is easy to install, and provides the flexibility in where the switch/dimmer can be placed. Use this wall dimmer to turn lights ON and OFF, as well as to dim or brighten to the desired intensity regardless of existing wiring. As part of the ControlScope system, this product can be centrally managed and configured from any location using the ControlScope Manager console. Contact us for more information.


Communicating Thermostats (JA5)

All thermostats are capable of responding to demand response signals through automatic setpoint adjustments in the event of grid congestion and shortages during high electrical demand periods.

 

How We Can Help:

Automated demand response capability is designed into ControlScope with no additional cost, eliminating the need for a separate automated DR system. An OpenADR certified solution, ControlScope provides the ability to use HVAC, lighting, and plug load control strategies to respond automatically to an OpenADR event, ensuring easy compliance. Daintree Networks works directly with utilities in California to ensure ControlScope is directly applicable for their incentive programs. Contact us for more information.


 

See also

 

ControlScope Reference Guide for Title 24

 

*The information provided on these pages is for reference only and should not be relied upon for any building construction or alteration decisions. Daintree shall not be liable for reliance on the information on these pages. Please refer to the California Energy Commission’s (CEC) 2013 Title 24 Standards/Regulations for precise interpretation. The complete standards and compliance manuals are available on the CEC website.