D.C. Mun. Regs. tit. 12, 12-I9.4

Current through Register Vol. 71, No. 49, December 6, 2024

Section 12-I9.4 - MANDATORY PROVISIONS

Strike Section 9.4.1.1 of ASHRAE 90.1 in its entirety and insert a new Section 9.4.1.1 in its place in the Energy Conservation Code-Commercial Provisions to read as follows:

9.4.1.1

Interior Lighting Controls. For each space in the building, all of the lighting control functions indicated in Table 9.6.1, for the appropriate space type in column A, and as described below, shall be implemented. All control functions labeled with an "REQ" are mandatory and shall be implemented. If a space type has control functions labeled "ADD1" then at least one of those functions indicated as "ADD1" shall be implemented. If a space type has control functions labeled "ADD2" then at least one of those functions indicated as "ADD2" shall be implemented. For space types not listed, select a reasonably equivalent type.

If using the Space-by-Space Method for LPD requirements, the space type used for determining control requirements shall be the same space type used to determine the LPD.

a.Local control: There shall be one or more manual lighting controls in the space that controls all of the lighting in the space. Each control device shall control an area (1) no larger than 2500 ft 2 (232.25 m2) if the space is 10,000 ft 2 (929.03 m2), and (2) no larger than 10,000 ft 2 ((929.03 m2) otherwise. The device installed to comply with this provision shall be readily accessible and located so that the occupants can see the controlled lighting when using the control device.

Exception: Remote location of this local control device or devices shall be permitted for reasons of safety or security when each remote control device has an indicator pilot light as part of or next to the control device and the light is clearly labeled to identify the controlled lighting.

b.Restricted to manual ON: None of the lighting shall be automatically turned on.

Exception: Manual ON is not required where manual ON operation of the general lighting would endanger the safety or security of the room or building occupants.

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, and none of the remaining lighting shall be automatically turned on.

d.Bilevel lighting control: The general lighting in the space shall be controlled so as to provide at least one intermediate step in lighting power or continuous dimming in addition to full ON and full OFF. At least one intermediate step shall be between 30% and 70% (inclusive) of full lighting power.

Exception: Existing and/or renovation spaces shall not be required to provide bi-level lighting control in areas where no work is to be performed or where only the existing light switch is being relocated due to door relocations.

e.Automatic daylight responsive controls for sidelighting: In any space where the combined input power of all general lighting completely or partially within the primary side- lighted areas is 150 W or greater, the general lighting in the primary sidelighted areas shall be controlled by photocontrols.

The control system shall have the following characteristics:

1. The calibration adjustments shall be readily accessible.

2. The photocontrol shall reduce electric lighting in response to available daylight using continuous dimming or with at least one control point between 50% and 70% of design lighting power, a second control point between 20% and 40% of design lighting power or the lowest dimming level the technology allows, and a third control point that turns off all the controlled lighting.

Exceptions: The following areas are exempted from Section 9.4.1.1(e):

1. Primary sidelighted areas where the top of any existing adjacent structure is twice as high above the windows as its distance away from the windows.

2. Sidelighted areas where the total glazing area is less than 20 ft .

3. Retail spaces.

4. Where the total interior lighting power (watts) of the building is no more than 80 percent of the interior lighting power allowance calculated by the Building Area Method in Section 9.5, or no more than 80 percent of the interior lighting power allowance calculated by the Space by-Space Method in Section 9.6.

f.Automatic daylight responsive controls for toplighting: In any space where the combined input power for all general lighting completely or partially within daylight areas under skylights and daylight areas under roof monitors is 105 W or greater, general lighting in the daylight area shall be controlled by photocontrols having the following characteristics:

1. The calibration adjustments shall be readily accessible.

2. The photocontrol shall reduce electric lighting in response to available daylight using continuous dimming or with at least one control point that is between 50% and 70% of design lighting power, a second control point between 20% and 40% of design lighting power or the lowest dimming level the technology allows, and a third control point that turns off all the controlled lighting.

3. General lighting in overlapping toplighted and side- lighted daylight areas shall be controlled together with general lighting in the daylight area under sky- lights or daylight areas under roof monitors.

Exceptions: The following areas are exempted from Section 9.4.1.1(f):

1. Daylight areas under skylights where it is documented that existing adjacent structures or natural objects block direct sunlight for more than 1500 daytime hours per year between 8 a.m. and 4 p.m.

2. Daylight areas where the skylight visual transmittance (VT) is less than 0.4.

3. In each space within buildings in Climate Zone 8 where the input power of the general lighting within daylight areas is less than 200 W.

4. Where the total interior lighting power (watts) of the building is no more than 80 percent of the interior lighting power allowance calculated by the Building Area Method in Section 9.5, or no more than 80 percent of the interior lighting power allowance calculated by the Space-by-Space Method in Section 9.6.

g.Automatic partial OFF (full OFF complies): The general lighting power in the space shall be automatically reduced by at least 50% within 20 minutes of all occupants leaving the space.

Exceptions: This requirement does not have to be complied with in spaces that meet all three of the following requirements:

1. The space has an LPD of no more than 0.80 W/ft

2. The space is lighted by HID.

3. The general lighting power in the space is automatically reduced by at least 30% within 20 minutes of all occupants leaving the space.

h.Automatic full OFF: All lighting shall be automatically shut off within 20 minutes of all occupants leaving the space, except for restrooms, which shall be set to a maximum of 30 minutes.

A control device meeting this requirement shall control no more than 5000 ft . Exceptions: The following lighting is not required to be automatically shut off:

1. General lighting and task lighting in shop and laboratory classrooms.

2. General lighting and task lighting in spaces where automatic shutoff would endanger the safety or security of room or building occupants.

3. Lighting required for 24/7 operation or emergency lighting.

i.Scheduled shutoff: All lighting in the space not exempted by Exception (1) to Section 9.1.1 shall be automatically shut off during periods when the space is scheduled to be unoccupied using either (1) a time-of-day operated control device that automatically turns the lighting off at specific programmed times or (2) a signal from another automatic control device or alarm/security system. The control device or system shall provide independent control sequences that (1) control the lighting for an area of no more than 25,000 ft , (2) include no more than one floor, and (3) shall be programmed to account for weekends and holidays. Any manual control installed to provide override of the scheduled shutoff control shall not turn the lighting on for more than two hours per activation during scheduled off periods and shall not 2 control more than 5000 ft .

Exceptions: The following lighting is not required to be on scheduled shutoff:

1. Lighting in spaces where lighting is required for 24/7 continuous operation or emergency lighting.

2. Lighting in spaces where patient care is rendered.

3. Lighting in spaces where automatic shutoff would endanger the safety or security of the room or building occupants.

Strike Section 9.4.1.4 of ASHRAE 90.1 in its entirety and insert a new Section 9.4.1.4 in its place in the Energy Conservation Code-Commercial Provisions to read as follows:

9.4.1.4

Exterior Lighting Control. Lighting for exterior applications not exempted in Section 9.1 shall meet the following requirements:

a. Lighting shall be controlled by a device that automatically turns off the lighting when sufficient daylight is available.

b.

All building façade and landscape lighting shall be automatically shut off between midnight or business closing, whichever is later, and 6 a.m. or business opening, whichever comes first, or between times established by the authority having jurisdiction.

c. Lighting not specified in Section 9.4.1.4(b) and lighting for signage shall be controlled by a device that automatically reduces the connected lighting power by at least 30% for at least one of the following conditions:

1. From 12 midnight or within one (1) hour of the end of business operations, whichever is later, until 6 a.m. or business opening, whichever is earlier.

2. During any period when no activity has been detected for a time of no longer than 15 minutes.

All time switches shall be capable of retaining programming and the time setting during loss of power for a period of at least ten hours.

Exceptions:

1. Lighting for covered vehicle entrances or exits from buildings or parking structures where required for safety, security, or eye adaptation.

2. Lighting that is integral to signage and installed in the signage by the manufacturer.

9.4.1.4.1

Parking Lighting. This section supersedes Section 9.4.1.4 for lighting serving uncovered parking areas. Outdoor luminaires serving uncovered parking areas shall be controlled by all of the following:

a. Luminaires shall be controlled by a device that automatically turns off the luminaire during daylight hours.

b. Luminaires shall be controlled by a timeclock or other control that automatically turns off the luminaire according to a timed schedule.

c. For luminaires having a rated input wattage of more than 50 W and where the bottom of the luminaire is mounted 24 ft (7.3 m) or less above the ground, the luminaires shall be controlled by one or more devices that automatically reduce lighting power of each luminaire by a minimum of 40% when there is no activity detected in the controlled zone for a period no longer than 15 minutes. No more than 1500 input watts of lighting power shall be controlled together.

Exceptions to 9.4.1.4.1(c):

1. Lighting serving uncovered parking areas does not include lighting for outdoor sales, including vehicle sales lots.

2. Lighting for covered vehicle entrances or exits from buildings or parking structures where required for safety, security, or eye adaptation.

TABLE 9.4.2-2 INDIVIDUAL LIGHTING POWER ALLOWANCES FOR BUILDING EXTERIORS

Zone 0	Zone 1	Zone 2	Zone 3	Zone 4
Base Site Allowance (base allowance may be used in tradable or non-tradable
surfaces) No b in Zone 0	ase site 500 W	600 W	750 W	1300 W
Tradable Surfaces (LPDs for uncovered parking areas, building grounds, building entrances, exits and loading docks, canopies and overhangs, and outdoor sales areas may be traded.)
Uncovered Parking Areas
Parking areas and drives	No allowance	0.03 W/ft2	0.05 W/ft2	0.09 W/ft2	0.12 W/ft2
Building Grounds
Walkways less than 10 ft wide	No allowance	0.63 W/linear foot	0.63 W/linear foot	0.76 W/linear foo	t .95 W/linear foot
Walkways 10 ft wide or greater	Plaza areas	Special	feature	areas
No allowance 0.12	0.12 W/ft2	0.15 W/ft2	0.19 W/ft2
W/ft2
Stairways	No allowance	0.67 W/ft2	0.9 W/ft2	0.95 W/ft2	0.95 W/ft2
Pedestrian tunnels	No allowance	0.13 W/ft2	0.13 W/ft2	0.19 W/ft2	0.28 W/ft2
Landscaping	No allowance	0.03 W/ft2	0.04 W/ft2	0.04 W/ft2	0.04 W/ft2
Building Entrances, Exits, and Loading Docks
Main entries width	No allowance	18 W/lin ft of door	18 W/lin ft of door width	28.5 W/lin ft of door width	28.5 W/lin ft of door width
Other doors	No allowance	18 W/lin ft of door width	18 W/lin ft of door width	19 W/lin ft of door width	19 W/lin ft of door width
Entry canopies	No allowance	0.22 W/ft2	0.22 W/ft2	0.38 W/ft2	0.38 W/ft2
Loading docks	No allowance	0.45 W/ft2	0.45 W/ft2	0.47 W/ft2	0.47 W/ft2
Sales Canopies
Free standing and attached	No allowance	0.54 W/ft2	0.54 W/ft2	0.76 W/ft2	0.95 W/ft2
Outdoor Sales
Open areas (including vehicle sales lots)	No allowance	2 0.22 W/ft	0.22 W/ft2	0.47 W/ft2	0.66 W/ft2
Street frontage for vehicle sales lots in addition to "open area" allowance	No allowance	No allowance	9 W/linear foot	9.5 W/linear foot	28.5 W/linear foot
Nontradable Surfaces (LPD calculations for the following applications can be used only for the specific application and cannot be traded between surfaces or with other exterior lighting. The following allowances are in addition to any allowance otherwise permitted in the "Tradable Surfaces" section of this table.)
Building facades	No allowance	No allowance	0.09 W/ft2 for each illuminated wall or surface or 2.37 W/ linear foot for each illuminated wall or surface length	0.14 W/ft2 for each illuminated wall or surface or 3.56 W/ linear foot for each illuminated wall or surface length	0.19 W/ft2 for each illuminated wall or surface or 4.75 W/ linear foot for each illuminated wall or surface length
Automated teller machines and night depositories	No allowance	256.5 W per location plus 85.5 W per additional ATM per location	256.5 W per location plus 85.5 W per additional ATM per location	256.5 W per location plus 85.5 W per additional ATM per location	256.5 W per location plus 85.5 W per additional ATM per location
Entrances and gatehouse inspection stations at guarded facilities	No allowance	0.71 W/ft2 of uncovered area (covered areas are included in the "Canopies and Overhangs" section of "Tradable Surfaces")	0.71 W/ft2 of uncovered area (covered areas are included in the "Canopies and Overhangs" section of "Tradable Surfaces")	0.71 W/ft2 of uncovered area (covered areas are included in the "Canopies and Overhangs" section of "Tradable Surfaces")	0.71 W/ft2 of uncovered area (covered areas are included in the "Canopies and Overhangs" section of "Tradable Surfaces")
Loading areas for law enforcement, fire, ambulance, and other emergency service vehicles	No allowance	0.47 W/ft2 of uncovered area (covered areas are included in the "Canopies and Overhangs" section of "Tradable Surfaces")	0.47 W/ft2 of uncovered area (covered areas are included in the "Canopies and Overhangs" section of "Tradable Surfaces")	0.47 W/ft2 of uncovered area (covered areas are included in the "Canopies and Overhangs" section of "Tradable Surfaces")	0.47 W/ft2 of uncovered area (covered areas are included in the "Canopies and Overhangs" section of "Tradable Surfaces")
Drive-through windows/ doors	No allowance	380 W per drive-through	380 W per drive-through	380 W per drive-through	380 W per drive-through
Parking near 24-hour retail entrances	No allowance	760 W per main entry	760 W per main entry	760 W per main entry	760 W per main entry
Roadway/parking entry, trail head, and toilet facility, or other locations approved by the authority having jurisdiction.	A single luminaire of 60 W or less may be installed for each roadway/ parking entry, trail head, and toilet facility, or other locations approved by the authority having jurisdiction	No allowance	No allowance	No allowance	No allowance

D.C. Mun. Regs. tit. 12, 12-I9.4

Final Rulemaking published at 67 DCR 5679 (5/29/2020)