Private Offices
Discover energy-saving solutions for private offices with Rayzeek’s occupancy sensor design guide. Learn how to meet energy code requirements while optimizing lighting control for efficiency and comfort.
Optimize Energy Use in Private Offices with Smart Lighting Control
Private offices are individual workspaces, often enclosed by walls and a door, providing a quiet and focused environment for tasks that require concentration. These spaces are typically equipped with overhead lighting and task lighting, which can contribute significantly to the overall energy consumption of a commercial building.
Despite their benefits, private offices often face the issue of lights being left on when the space is unoccupied, leading to unnecessary energy waste. This is particularly problematic given that private offices are not continuously occupied throughout the day, with occupants often leaving for meetings, breaks, or other tasks.
To address this issue, occupancy sensors offer an effective solution. These devices can automatically turn off lights when the office is vacant, significantly reducing energy consumption. By integrating occupancy sensors into private offices, businesses can not only meet energy code requirements but also achieve substantial energy savings and improve their sustainability efforts.
에너지 코드 준수
국제에너지보존코드(IECC)는 건물 에너지 효율성을 위한 최소 설계 및 시공 요구사항을 규정하기 위해 ICC(International Code Council)에서 개발한 모델 코드입니다. IECC는 최신 에너지 절약 실천법과 기술을 반영하기 위해 3년마다 개정됩니다.
IECC를 주목해야 하는 이유
IECC는 미국 전역의 주 및 지방 자치 단체에서 널리 채택되고 있습니다. IECC는 건물 외피(벽, 지붕, 창호), 난방 및 냉방 시스템, 조명 시스템을 포함한 에너지 사용의 다양한 측면을 다룹니다.
IECC는 다양한 구역의 빈 공간에서 발생하는 에너지 낭비를 최소화하기 위해 점유 감지 센서와 같은 특정 조명 제어 장치의 설치를 의무화합니다.
ANSI/ASHRAE/IES Standard 90.1(저층 주거용 건물을 제외한 부지 및 건물의 에너지 표준)은 미국냉난방공조학회(ASHRAE)에서 발행하는 광범위하게 인정받는 에너지 표준입니다.
ASHRAE 90.1을 주목해야 하는 이유
ASHRAE 90.1은 미국 전역의 건물 에너지 코드의 기준 표준으로 사용되며, 건물 외피, HVAC 시스템, 급탕 시스템, 조명 시스템을 포함한 상업용 건물 구성 요소의 에너지 효율적 성능에 대한 최소 요구사항을 개괄하는 IECC 내 준수 경로 역할을 합니다.
ASHRAE 90.1 표준은 최대 허용 조명 전력 밀도 및 특정 구역에서의 점유 감지 센서 사용을 포함한 최소 조명 제어 요구사항을 규정합니다.
캘리포니아 건물 표준법 Part 6의 Title 24(공식 명칭: 주거용 및 비주거용 건물 에너지 효율성 표준)는 캘리포니아 에너지 위원회(CEC)에서 관리하며, 새로운 에너지 효율 기술과 방법을 반영하기 위해 주기적으로 업데이트됩니다.
Title 24를 주목해야 하는 이유
Title 24는 미국 내 다른 수많은 에너지 코드보다 더욱 엄격한 요구사항을 가진 것으로 잘 알려져 있습니다. Title 24는 난방, 환기, 공조(HVAC), 급탕, 조명을 포함한 건물 건설의 모든 측면에 대해 엄격한 에너지 성능 표준을 준수하도록 규정합니다.
Title 24는 에너지가 낭비되지 않도록 상업용 건물의 특정 구역에서 재실 여부에 따라 조명을 조절하는 점유 감지 센서 설치를 의무화합니다.
주별 에너지 코드 채택 현황
상세 표를 보려면 펼치기 ↓
| 주(State) | Current Commercial Code | Commercial Code Efficiency Category |
|---|---|---|
| Alabama | 90.1-2013 | 90.1-2013 |
| Alaska | None statewide | No statewide code |
| Arizona | Home rule | <90.1-2007 |
| Arkansas | 2009 IECC and 90.1-2007 | 90.1-2007 |
| California | 2022 Building Energy Efficiency Standards | 90.1-2019 |
| Colorado | Home rule | No statewide code |
| Connecticut | 2021 IECC and 90.1-2019 | 90.1-2019 |
| Delaware | 2018 IECC and 90.1-2016 | 90.1-2013 |
| District of Columbia | 90.1-2013^ | 90.1-2019 |
| Florida | 2021 IECC and 90.1-2019^ | 90.1-2016 |
| Georgia | 2015 IECC and 90.1-2013^ | 90.1-2013 |
| Hawaii | Home rule | 90.1-2013 |
| Idaho | 2018 IECC and 90.1-2016 | 90.1-2013 |
| Illinois | 2021 IECC and 90.1-2019 | 90.1-2019 |
| Indiana | 90.1-2007 | 90.1-2007 |
| Iowa | 2012 IECC and 90.1-2010 | 90.1-2007 |
| Kansas | Home rule | No statewide code |
| Kentucky | 2012 IECC and 90.1-2010 | 90.1-2007 |
| Louisiana | 2021 IECC and 90.1-2019^ | 90.1-2016 |
| Maine | 2015 IECC and 90.1-2013 | 90.1-2013 |
| Maryland | 2021 IECC and 90.1-2019^ | 90.1-2019 |
| Massachusetts | 2018 IECC and 90.1-2016^ | 90.1-2019 |
| Michigan | 2015 IECC and 90.1-2013^ | 90.1-2013 |
| Minnesota | 90.1-2019^ | 90.1-2019 |
| Mississippi | None statewide | No statewide code |
| Missouri | Home rule | No statewide code |
| Montana | 2021 IECC and 90.1-2019 | 90.1-2019 |
| Nebraska | 2018 IECC and 90.1-2016 | 90.1-2013 |
| Nevada | 2018 IECC and 90.1-2016 | 90.1-2013 |
| New Hampshire | 2018 IECC and 90.1-2016^ | 90.1-2013 |
| New Jersey | 90.1-2019 | 90.1-2019 |
| New Mexico | 2021 IECC and 90.1-2019^ | 90.1-2019 |
| New York | 2018 IECC and 90.1-2016^ | 90.1-2016 |
| North Carolina | 2015 IECC and 90.1-2013^ | 90.1-2010 |
| North Dakota | Home rule | No statewide code |
| Ohio | 2021 IECC and 90.1-2019^ | 90.1-2016 |
| Oklahoma | 2006 IECC and 90.1-2004 | <90.1-2007 |
| Oregon | 90.1-2019 | 90.1-2019 |
| Pennsylvania | 2018 IECC and 90.1-2016 | 90.1-2013 |
| Rhode Island | 2018 IECC and 90.1-2016^ | 90.1-2013 |
| South Carolina | 2009 IECC and 90.1-2007 | 90.1-2007 |
| South Dakota | Home rule | No statewide code |
| Tennessee | 2021 IECC and 90.1-2013 | 90.1-2007 |
| Texas | 2015 IECC and 90.1-2013 | 90.1-2013 |
| Utah | 2021 IECC and 90.1-2019^ | 90.1-2019 |
| Vermont | 2021 IECC and 90.1-2019^ | 90.1-2019 |
| Virginia | 2021 IECC and 90.1-2019^ | 90.1-2019 |
| Washington | 2018 Washington State Energy Code | 90.1-2019 |
| Tennessee | 2012 IECC and 90.1-2010 | 90.1-2007 |
| Texas | 2015 IECC and 90.1-2013 | 90.1-2013 |
| Utah | 2021 IECC and 90.1-2019^ | 90.1-2019 |
| Vermont | 2018 IECC and 90.1-2016^ | 90.1-2019 |
| Virginia | 2021 IECC and 90.1-2019^ | 90.1-2019 |
| Washington | 2018 Washington State Energy Code | 90.1-2019 |
| West Virginia | 90.1-2013 | 90.1-2013 |
| Wisconsin | 2015 IECC and 90.1-2013^ | 90.1-2010 |
| Wyoming | Home rule | No statewide code |
- ^ When an amendment impacting energy efficiency can be quantified using DOE Prototype Building Models, they were captured in the analysis.
- For states adopting both IECC and 90.1, the IECC code is usually analyzed as the state current code in this study except for states with extensive amendments to the IECC.
Design Guide Key Concepts for Private Offices
Designing an energy-efficient lighting control solution for private offices involves strategic placement of occupancy sensors to ensure comprehensive coverage of the space.
- Sensor Placement: Position the sensor to cover the main areas of activity, such as the desk and the entrance. The sensor should have a clear line of sight to these areas, unobstructed by furniture or other objects. For private offices, wall-mounted sensors or ceiling-mounted sensors can be effective, depending on the room layout and furniture arrangement.
- Coverage of Minor Movements: Ensure that the desk area falls within the minor motion coverage area of the sensor. This means that even small movements, such as typing or turning pages in a book, should be detected by the sensor to prevent the lights from turning off while the space is occupied.
- Avoidance of Obstructions: If using wall-mounted sensors, ensure that tall furniture like bookcases does not block the sensor’s view of the room. Similarly, the sensor’s view should not be blocked by the door when it’s open.
- Entrance Coverage: The sensor should have a clear view of the entrance to detect occupancy as soon as someone enters the room. If the door blocks the sensor’s view when open, consider using an additional sensor to cover the entrance.
- Avoidance of Interference: Sensors should not be mounted close to air vents, as the vibration and air flow can reduce their effectiveness.
- Manual Control: Incorporate manual controls for occupants to turn the lights ON/OFF as needed. These controls should be conveniently located, often near the entrance.
Featured Products & Solutions
Wall Sensor Switches
RZ020/021 Motion Sensor Switches
- 2-wire, 3-wire, 4-wires wiring options
- Occupancy, Vacancy, Manual ON/OFF
- Adjustive time delay and ambient light control
Multi-Location Wireless Wall Sensors
RZ020A/021A + RZ022W Kits
- Hardwired RZ021A/022A occupancy sensor switch
- Wireless companion switch (RZ022W) for multi-location control
Ceiling Occupancy Sensors
RZ036
- Hardwired occupancy sensors
- Auto ON, auto OFF
- Line voltage and Low voltage available
Core features included:
- Integrated manual ON/OFF control for all lighting
- Vacancy sensors (Manual ON only): Lights must be turned on manually only
- Adjustable time-delay, lighting is automatically turned full OFF after 15mins
- Additional: multi-location wireless kits to expand the control range without re-wring
- Additional: multiple wiring options available for both new constructions and retrofit projects.
Meets the Mandatory Provisions
IECC – 2011
C405.2.1 Occupant sensor controls
Occupant sensor controls shall be installed to control lights in the space.
For private/small offices <300 sq. ft:
C405.2.1.1 Occupant sensor control functions
- Manual on or partial on to no more than 50% power.
- Full off within 20 minutes after all occupants have left the space
- A manual control to turn off the lights.
ASHRAE 90.1 – 2022
For private/small/enclosed offices <300 sq. ft:
9.4.1.1 a Local control
There shall be one or more manual lighting control device that provides ON and OFF control
of all lighting in the space.
9.4.1.1 b Restricted to manual ON
None of the lighting shall be automatically turned on
9.4.1.1 c Restricted to partial automatic ON
No more than 50% of the lighting power for the general lighting shall be allowed to be automatically turned on
** NOTE: At least one 9.4.1.1 b or 9.4.1.1 c shall be implemented.
9.4.1.1 H Automatic full OFF control
All lighting in the space shall be automatically shut off within 20 minutes of all occupants leaving the space
Title 24 – 2022
For private/small offices <250 sq. ft:
130.1 (a) Manual area controls.
Each area enclosed by ceiling-height partitions shall provide lighting controls that allow the lighting in that area to be manually turned on and off.
130.1 (c) Shut-OFF Controls.
Lighting shall be controlled with occupant sensing controls to automatically shut OFF all of the lighting in 20 minutes or less after the control zone is unoccupied that shall function either as:
- A. Occupant sensing controls (if 130.1(b) not required to have multi-level lighting controls); or
- B. Partial-ON occupant sensing controls, or
- C. Vacancy sensing controls, where all lighting responds to a manual ON input only
Let us hear you.
Let Rayzeek help design and deliver a bespoke energy-saving lighting solution for you.
