A NGuide a t i o n a l for G r i d Applicants a n d E v e r s o uand r c e Lighting Practitioners V4-20150202 Sustainable Office Design (SOD) is different than existing programs The new SOD Lighting Initiative offer incentives for well-thought out, controls-rich lighting solutions. STEP 1: Organize the planned space into commonly used space types as found in this guide. STEP 2: The SOD Lighting Program does not dictate specific products or technologies. A target level of performance must be met, but the means of doing is not prescribed. A lighting practitioner may use this guide to design an effective system for a specific project that SOD qualifying designs use sophisticated lighting controls overlaid on efficient, low-installed wattage lighting plans. The effective Lighting Power Density (LPD) of SOD-qualifying installations are significantly below code maximums and will contribute toward LEED and Energy Star Certification in buildings that have them. Select lighting fixtures and layouts that deliver appropriate lighting levels and quality to the space while staying close to the LPD target for that space type. Refer to space-specific suggestions in this guide if needed. Additional lighting design information can be found at: https://algonline.org/ STEP 3: Select control components and technologies that meet the minimum performance characteristics found for that space type in this guide. Work with manufacturer s latest technical guidance to specify specific controls and determine optimum layouts. STEP 4: Compare the as-designed LPD and as-designed number of control points with SOD Lighting Incentive requirements. If satisfied, complete an application form. Inside this Guide: Step One 2 Step Two 2 Step three 3 Open Offices 4 Private Offices 5 Meeting Rooms 6 Circulation Spaces 7 Reception areas 7 Program Requirements 8
STEP 1: Organize the leased area into commonly used office space types prior to selecting lighting fixtures and controls. A Guide for Lighting Practitioners and Applicants Best practices guidance offered here targets both lighting power density (LPD) and control parameters for distinct space uses. Six space types make up the majority of space use in the modern office, and offer the greatest energy saving opportunities.. STEP 2: OPEN offices have a target lighting power density of 0.6 w/sf Select lighting fixtures and layouts that deliver appropriate lighting levels and quality to the space while staying close to the LPD target for that space type. Assign specific lighting design patterns to the common space types, such as open offices areas, private offices, meeting and conference rooms, and other space uses found within the typical business office. Open Office space will occupy more than 40% of the floor area of a SOD qualifying installation. Both Interior Open Offices and Daylit Open Office (perimeter exposure or below skylights) plans qualify. Private offices should be grouped into large (greater than 300 sf) and regular categories. Each size range has its own recommended lighting design patterns and lighting control requirements. Select lighting solutions for each space type Advances in lighting technology make low LPD designs possible. Areas within 15 ft. of windows will have day-lighting controls Private offices placed on the perimeter should have daylight dimming capability Recessed luminaires are most appropriate for open plan spaces with ceilings 8'4" or lower, since they do not illuminate the ceilings and have a greater potential for high angle glare. Suspended luminaires provide better quality for open plan ceiling heights above 8'-4". Solid State Lighting using LEDs as a light source are now found in almost every fixture type in all the major manufacturer s lines. This technology is directly competing with fluorescent systems. Particularly attractive is the low incremental cost at which manufactures can provide of full dimming capability and integrate fixture mounted control sensors. Suspended linear fixtures are available with both high-efficiency fluorescent and LED sources Page 2
Design lighting for each space type at or below the following LPD guidelines Space Type LPD (W/sf) Notes Open Offices 0.6 Shared workspace with open desks or less than 48 inch high cubical partitions. Maximum 2,500 SF per control area fc (horizontal) 30-50 fc Private Offices 0.7 Private, enclosed office with one primary occupant Small Meeting Rooms 0.9 Workroom with area < 300 SF Conference Rooms 1.1 Workroom with area > 300 SF and multipurpose lighting 30-50 fc 20-70 fc 20-70 fc Corridors 0.5 10-20 fc Lobbies and Reception Areas 1 5-20 fc Copy, File and Work Rooms 0.7 20-50 fc Foot-Candle illumination levels based on information gathered from the IES The Lighting Handbook 10th Edition STEP 3: Select control components and technologies that meet the minimum performance characteristics found for that space type in this guide. Open Office Office-Space Type Open Office Daylit Zone Private Offices (< 300 SF in size) Large Private Offices (> 300 SF in size) Conference and Training Rooms < 300 SF Conference or Training >300 SF Corridors Copy, File and Work Rooms Reception, Lobby and Waiting Storerooms Employee Break-rooms Digitally addressable control products operating on wireless networks extend room lighting controls to the desktop and conference table. SOD Control Category A B C D E F G H K O P Pair space types with controls Matching a lighting control categories with assigned space types, such as open offices areas, private offices, meeting and conference rooms, and other commonly found spaces within the typical business office, guides the applicant to appropriate STEP 4: Compare the as-designed LPD and as-designed number of control points with SOD Lighting Incentive requirements. If satisfied, complete an application form. Occupancy Sensors Auto ON/Auto OFF activation wall mounted Occupancy sensors with dual relays provide control of two lighting circuits or two lighting levels. Use the best control technologies Consider digital lighting control, which enables remote programming while providing other advantages such as energy reporting and diagnostics and simple future integration of additional control strategies. Fixture mounted sensors and digital controls can simplify installation. An integrated control scheme using smart fixtures incorporating networked (wireless or wired) controls is an acceptable and recommended alternate to localized low voltage control of line voltage loads. Control can be provided by Independent, stand-alone lowvoltage sensors and relays using Class 2 wiring. Page 3
Open offices have a target average horizontal lighting level of 30-35 foot-candles, with 45-75 fc on the A Guide for Lighting Practitioners and Applicants Open Offices Use a LPD target of 0.6 W/sf for open offices work surfaces A Indirect/direct suspended fixtures or high-efficiency recessed provide the ambient illumination in work areas. D B B Fixtures specified with continuous dimming down to 10% or lower of full output. These fixtures are used for daylight harvesting, are capable of reducing electric light in response to the availability of natural light, and are controlled by photosensors. C A C Fixtures used for ambient lighting in circulation zones. D Task lights supplement the ambient lighting for any employee who simply desires more light. SOD Lighting Plans go beyond the following typical Code Requirement (2012 IECC) Use Control Category A in interior Open Offices Use Control Category B in day-lit Open Offices Manual control of two lighting loads to allow reasonably uniform min 50% reduction in connected load Manual control of two lighting loads to allow reasonably uniform 50% reduction in connected load Manual control of two lighting loads to allow reasonably uniform 50% reduction in connected load Keep office cubicle partitions low to allow for greatest efficiency and most comfortable light levels. Products Lighting in daylit zones controlled separately from general lighting, with stepped or continuous dimming to minimum 35%. Automated shut off from timeclock or building management control after hours Occupancy sensors not required Dual Technology Zoned occupancy controls Automated after hours shut off from time-clock or BMC system Major manufacturers provide design guidance for the use of automated controls, including line voltage, low voltage and wired and wireless digital controls. Integrated digital control systems take advantage of new digital (LED) lighting and network ready lighting products. Conventional lighting can be controlled with stand-alone sensors (with necessary control packs) such as SensorSwitch CM-ADC-DZ series with CM-ADC series photosensors, Wattstopper DT-300/DT-305 series with LightSaver LS-301 series photosensors, Cooper OAC-DT-1000-MV series with Greengate DLC-PD-DIM series photosensors. Dual Technology Zoned occupancy controls Photosensors for 0-10 VDC electronic dimming in day-lit zones to minimum 20% Automated after hours shut off from time-clock or BMC system Use Control Category B For Daylit Open Office within 15 feet of windows or below skylights Page 4
A A Guide for Lighting Practitioners and Applicants Private Offices A Indirect/direct suspended or recessed fixtures are used for ambient lighting B Task lights located on the desktop supplement the ambient lighting for anyone who desires more light C Wall washers and down-lights for secondary use areas Private office lighting needs to balance the brightness of the room surfaces as well as providing multilevel illumination. This variation allows for personal needs and increased energy savings. Vacancy sensors are a minimum control strategy. Private offices with high ceilings and windows can use suspended Indirect/ Direct luminaires that illuminate the ceilings and walls as well as the desk area, providing a visually balanced and comfortable workplace. Adjustable desk lights are used to supplement illumination for tasks, and give users personal control and increased satisfaction. Use a LPD target of 0.6 W/sf for private offices A SOD Lighting Plans go beyond the following typical Code Requirement (2012 IECC) Use Control Category C in Small Private Offices Use Control Category D in larger day-lit Offices C Private offices have a target average horizontal lighting level of 30-35 foot-candles, with 45-75 fc on the work surfaces.. Manual control of two lighting loads to allow reasonably uniform min 50% reduction in connected load, OR an occupancy sensor Automated shut off from time-clock or building management control after hours Lights controlled with Auto ON/Auto OFF activation with Dual-Technology wall mounted occupancy sensor Combined vacancy and minimum 2 light levels. Fixtures use 0-10v dimming (LED) or a step-dimmed ballast Occupancy sensed control of at least one duplex power receptacle is recommended but not required. Lights are controlled with Manual ON/Auto OFF activation via wall or ceiling mounted dual technology occupancy sensor Primary fixtures have dimming LED drivers or fluorescent ballasts. Manual dimming provides choice to occupant Photosensors slowly reduce or cut off the use of electric lighting as natural light enters the space Occupancy sensed control of Products Daylighting Integrated digital control systems offer the most flexibility and can take advantage of new digital (LED) lighting and network ready lighting products. More conventional lighting can be controlled with stand-alone sensors (with necessary control packs) such as: SensorSwitch WSD-PDT-2P series, Wattstopper DW-200 series, Cooper ONW-D-1001-DMV series and 0-10 VDC electronic dimming -wallbox control (if dimmable fixtures used ). Although locating private offices on the interior and open-plan offices at building perimeter is a better strategy for daylight harvesting controls, daylighting controls should still be considered for private offices with perimeter windows. Page 5
Design Criteria Flexibility, glare control, and visual comfort are high priorities for interior meeting/conferencing environments. A Guide for Lighting Practitioners and Applicants Meeting Rooms and Conference Rooms B C B Indirect/direct suspended luminaire, used for ambient lighting and dimmable, down to 1% of full output for audio/visual purposes. C wallwasher, recessed above the ceiling with reflector and shield, oriented toward the walls to spread the light uniformly. Use a LPD target of 0.9 to 1.1 W/sf for meeting and conference rooms Meeting rooms have a target Horizontal SOD Lighting Plans go beyond the following typical Code Requirement (2012 IECC) Use Control Category E in Interior Small Meeting Rooms Use Control Category F in larger Conference Rooms Illuminance (average maintained footcandles) on the work surface of 45-55 fc for paper task performance. Vertical illuminance of 20-30 fc should be provided on selected display walls Manual control of two lighting loads to allow reasonably uniform min 50% reduction in connected load, OR an occupancy sensor Automated shut off from time-clock or building management control after hours Lights controlled with Auto ON/Auto OFF activation with Dual-Technology wall mounted occupancy sensor. Combined vacancy and minimum 2 light levels. Fixtures use 0-10v dimming (LED) or a step-dimmed ballast. Occupancy sensed control of at least one duplex power receptacle is recommended Combined vacancy and minimum 2 light levels Multi-level or multi-circuit switching enables occupants a choice of various light levels. Switch perimeter fixtures separately. General, wall and AV wall lighting separately zoned and controlled using manual dimmers or preset integrated dimmer Lights are controlled with but not required. Manual ON/Auto OFF activation via ceiling mounted dual technology occupancy sensor. Fixtures use dimming LED Products drivers or fluorescent ballasts to allow varying light levels. Integrated digital control systems offer the most flexibility and can take advantage of new digital (LED) lighting and network ready lighting products. More conventional lighting can be controlled with standalone sensors (with necessary control packs) such as: Photosensors slowly reduce or cut off the use of electric Sensor Switch CM-10, Wattstopper CI-305, Cooper VAC-P series, with low-voltage switch Manufacturer s guidelines and literature should be checked before final specification of products Page 6
A Guide for Lighting Practitioners and Applicants Reception Areas and General Circulation A Recessed high-efficiency linear architectural troffers along cross corridors. B Recessed high-efficiency architectural troffers over primary work surfaces. C Recessed LED wall washers and downlights at areas of interest and for general ambient lighting. SOD Lighting Plans go beyond the following typical Code Requirement (2012 IECC) Use Control Category G in circulation Use Control Category K in Reception Areas Meeting rooms have a target Horizontal Illuminance (average maintained footcandles) on the work surface of Manual control by occupant Display and accent lighting be separately controlled from other lighting in the space Automated shut off from time-clock or building management control after hours Lights controlled with Auto ON/Auto OFF activation via wall or ceiling mounted occupancy sensor with infrared and ultrasonic sensors (dual-tech). Occupancy sensor control. Auto on to 100% level. In corridors and stairwells requiring security lighting, occupancy sensor brings lighting from 50% to 100%. Lights controlled with Auto ON/Auto OFF activation via wall or ceiling mounted occupancy sensor with infrared and ultrasonic sensors (dual-tech). Occupancy sensor control - Auto on to 100% level. Display and accent lighting be separately controlled from other lighting in the space. 45-55 fc for paper task performance. Vertical illuminance of 20-30 fc should be provided on Products Integrated digital control systems offer the most flexibility and can take advantage of new digital (LED) lighting and network ready lighting products. More conventional lighting can be controlled with standalone sensors (with necessary control packs) such as: Sensor Switch CM-10, Wattstopper CI-305, Cooper VAC-P series, with low-voltage switch Manufacturer s guidelines and literature should be checked before final specification of products Page 7
National Grid and Eversource are introducing a new product in their New Construction portfolio called Sustainable Office Design (S.O.D.) as a means of delivering integrated technical solutions to the leased commercial office market. The goal is to increase penetration of utility delivered savings in the leased office Tenant Improvement (TI) sector. Strategic elements of the new OTF program are: Obtain better savings by moving beyond simple prescriptive lamp and ballast approaches to system based/integrated design solutions. Better service this market sector with newly crafted initiatives aligned to the idiosyncrasies of the Building Management / Tenant Improvement market. Offer a predictable incentive at $1.00 per sq/ft of leased space (net of common areas). Develop a simplified qualification and application process leveraging documentation common to commercial tenant fit-up construction processes. Program Requirements All projects qualifying for this program must: Be a code-dependent office fit-out project or extensive/ substantial renovation project that consists of the installation of new fixtures throughout the building or renovated spaces. Provide maintained lighting levels in accordance with the recommendations of the Illuminating Engineering Society of North America s (IESNA) 10th Edition Handbook or supporting Design Guides. Provide high quality lighting achieving appropriate levels of glare control, color rendering, lighting uniformity and other lighting quality parameters. Meet all requirements as specified in this application document. LED products should meet or exceed ENERGY STAR or Design Lights Consortium (DLC) technical requirements. Those that are not Energy Star or DLC rated should be discussed with your utility representative. Projects must meet current state and local energy code requirements. Contact Us Kim Cullinane Eversource, Program Manager Energy Efficiency Services kim.cullinane@eversource.com Tracey Beckstrom National Grid, Lead Commercial Sales New Construction tracey.beckstrom@nationalgrid.com Frequently Asked Questions 1. How is the rebate calculated? Qualifying projects receiving an incentive of $1.00 per square foot, in controlled, conditioned interior spaces. 100% of the incentive will be paid after project occupancy. 2. What are the basic project qualifications? The project must be at least 7,500 square feet. At least one (1) lighting control point must be provided for every 290 square feet of space. The project must achieve a lighting power density (LPD) not greater than 0.675 W/SF. 3. When calculating the 7,500 SF threshold, can this include connecting corridors and common areas if they are included in a lighting upgrade with a TI work? The SOD lighting applies only to individual tenant spaces. Common areas, building lobbies and corridors between discrete tenants can not be used as part of the qualifying square footage nor is that square footage eligible for the SOD incentive. 4. How is the minimum area square footage (SF) verified? SF (area square footage) is verified by examination of a signed COMcheck report. 5. Does qualifying for Sustainable Office Design Lighting incentives make me eligible for other lighting incentives? Projects that are eligible for this incentive program are not eligible for other prescriptive lighting incentives that support ballasts, occupancy sensors, photocells and time clocks. 6. Are exterior lighting projects eligible? No, exterior lighting systems are not eligible for this program. Qualifying projects must be in controlled, conditioned interior spaces. 7. Are LED lighting technologies eligible for this program? Yes, as long as the LED fixtures meet or exceed ENERGY STAR or Design Lights Consortium (DLC) technical requirements and are installed in conjunction with the program s qualifications. Other LED products should be discussed with your utility representative before use. 8. Where can I find a list of approved products? There is no requirement that specific products be used. A list of recommended products can be found at the program webpage. Please note: National Grid and Eversource do not endorse any particular manufacturers and encourages our customers to meet with different representatives to determine which system best meets their needs. Development of the Sustainable Office Design Lighting Program has been supported by the work of Waypoint Building Group and Weller & Michal Architects.