D.C. Mun. Regs. tit. 12, 12-I9.6

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

Section 12-I9.6 - ALTERNATIVE COMPLIANCE PATH: SPACE-BY-SPACE METHOD

TABLE 9.6.1 LIGHTING POWER DENSITY ALLOWANCES USING THE SPACE-BY-SPACE METHOD AND MINIMUM CONTROL REQUIREMENTS USING EITHER METHOD

Strike TABLE 9.6.1 Lighting Power Density Allowances Using the Space-by-Space Method and Minimum Control Requirements Using Either Method, in ASHRAE 90.1 and insert new Table 9.6.1 in its place in the Energy Conservation Code-Commercial Provisions to read as follows:

TABLE 9.6.1 Lighting Power Density Allowances Using the Space-by-Space Method and Minimum Control Requirements Using Either Method

Informative Note: This table is divided into two sections; this first section covers space types that can be commonly found in multiple building types. The second part of this table covers space types that are typically found in a single building type.	The control functions below shall be implemented in accordance with the descriptions found in the referenced paragraphs within Section 9.4.1.1. For each space type: (1) All REQs shall be implemented. (2) At least one ADD1 (when present) shall be implemented. (3) At least one ADD2 (when present) shall be implemented
Local Control (See Section 9.4.1.1[a])	Restricted to Manual ON (See Section 9.4.1.1[b])	Restricted to Partial Automatic ON (See Section 9.4.1.1[c])	Bilevel Lighting Control (See Section 9.4.1.1[d])	Automatic Daylight Responsive Controls for Sidelighting (See Section 9.4.1.1[e]6)	Automatic Daylight Responsive Controls for Toplighting (See Section 9.4.1.1[f]6	Automatic Partial OFF (See Section 9.4.1.1[g] [Full Off complies])	Automatic Full OFF (See Section 9.4.1.1[h])	Scheduled Shutoff (See Section 9.4.1.1[i])
Common Space Types¹	LPD, W/ft²	RCR Threshold	a	b	c	d	e	f	g	h	i
Atrium
... that is <20 ft in height ... that is >20 ft and <40 ft in height ... that is >40 ft in height 0	0.03/ft total height 0.03/ft total height . 0 + 0.02/ft total	NA NA NA	REQ REQ REQ	ADD1 ADD1 ADD1	ADD1 ADD1 ADD1	- REQ REQ	REQ REQ REQ	REQ REQ REQ	- - -	ADD2 ADD2 ADD2	ADD2 ADD2 ADD2 61
Audience Seating Area
... in an auditorium	0.63	6	REQ	ADD1	ADD1	REQ	REQ	REQ	-	ADD2	ADD2
... in a convention center	0.82	4	REQ	ADD1	ADD1	REQ	REQ	REQ	-	ADD2	ADD2
. in a gymnasium	0.65	6	REQ	ADD1	ADD1	REQ	REQ	REQ	-	ADD2	ADD2
... in a motion picture theater	1.14	4	REQ	ADD1	ADD1	REQ	REQ	REQ	-	ADD2	ADD2
... in a penitentiary	0.28	4	REQ	ADD1	ADD1	-	REQ	REQ	-	ADD2	ADD2
... in a performing arts theater	2.43	8	REQ	ADD1	ADD1	REQ	REQ	REQ	-	ADD2	ADD2
... in a religious building	1.53	4	REQ	ADD1	ADD1	REQ	REQ	REQ	-	ADD2	ADD2
... in a sports arena	0.43	4	REQ	ADD1	ADD1	-	REQ	REQ	-	ADD2	ADD2
... all other audience seating areas	0.43	4	REQ	ADD1	ADD1	-	REQ	REQ	-	ADD2	ADD2
Banking Activity Area	1.01	6	REQ	ADD1	ADD1	REQ	REQ	REQ	-	ADD2	ADD2
Breakroom
(See Lounge/Breakroom)
Classroom/Lecture Hall/Training Room
... in a penitentiary	1.34	4	REQ	ADD1	ADD1	REQ	REQ	REQ	-	REQ	-
... all other classrooms/lecture halls/ training rooms	1.24	4	REQ	ADD1	ADD1	REQ	REQ	REQ	-	REQ	-
Conference/Meeting/Multipurpose Room	1.10	6	REQ	ADD1	ADD1	REQ	REQ	REQ	-	REQ	-
Confinement Cells	0.81	6	REQ	ADD1	ADD1	REQ	REQ	REQ	-	ADD2	ADD2
Copy/Print Room	0.72	6	REQ	ADD1	ADD1	REQ	REQ	REQ	-	REQ	-
Corridor²
... in a facility for the visually impaired	0.92	width <8 ft	REQ	-	-	-	REQ	REQ	REQ	ADD2	ADD2
(and not used primarily by the staff)³	0.99	width <8 ft	REQ	-	-	-	REQ	REQ	ADD2	ADD2	ADD2
0.41	width <8 ft	REQ	-	-	-	REQ	REQ	-	ADD2	ADD2
0.56	width <8 ft	REQ	-	-	-	REQ	REQ	REQ	ADD2	ADD2
... all other corridors Courtroom	1.46	6	REQ	ADD1	ADD1	REQ	REQ	REQ	-	ADD2	ADD2
Computer Room	1.71	4	REQ	ADD1	ADD1	REQ	REQ	REQ	-	ADD2	ADD2
Dining Area
... in a penitentiary	0.96	6	REQ	ADD1	ADD1	REQ	REQ	REQ	-	ADD2	ADD2
... in a facility for the visually impaired (and not used primarily by staff)³	2.65	4	REQ	ADD1	ADD1	REQ	REQ	REQ	-	ADD2	ADD2
... in bar/lo unge or leisure dining	1.07	4	REQ	ADD1	ADD1	REQ	REQ	REQ	-	ADD2	ADD2
... in cafete ria or fast food dining	0.65	4	REQ	ADD1	ADD1	REQ	REQ	REQ	-	ADD2	ADD2
... in family dining	0.75	4	REQ	ADD1	ADD1	REQ	REQ	REQ	-	ADD2	ADD2
... all other dining areas	0.58	4	REQ	ADD1	ADD1	REQ	REQ	REQ	-	ADD2	ADD2
Electrical/Mechanical Room⁷	0.42	6	REQ	-	-	-	REQ	REQ	-	-	-
Emergency Vehicle Garage	0.56	4	REQ	ADD1	ADD1	-	REQ	REQ	-	ADD2	ADD2
Food Preparation Area	1.21	6	REQ	ADD1	ADD1	REQ	REQ	REQ	-	ADD2	ADD2
Guest Room	0.91	6	Se	e Section 9.4.1.3b.
Laboratory
... in or as a classroom	1.43	6	REQ	ADD1	ADD1	REQ	REQ	REQ	REQ	ADD2	ADD2
... all other laboratories	1.71	6	REQ	ADD1	ADD1	REQ	REQ	REQ	-	ADD2	ADD2
Laundry/Washing Area	0.57	4	REQ	ADD1	ADD1	REQ	REQ	REQ	-	ADD2	ADD2
Loading Dock, Interior	0.47	6	REQ	ADD1	ADD1	-	REQ	REQ	-	ADD2	ADD2
Lobby
... in a facility for the visually impaired (and not used primarily by the staff)³	1.80	4	REQ	-	-	-	REQ	REQ	REQ	ADD2	ADD2
... for an elevator	0.54	6	REQ	-	-	-	REQ	REQ	-	ADD2	ADD2
... in a hotel	1.06	4	REQ	-	-	-	REQ	REQ	-	ADD2	ADD2
... in a motion picture theater	0.56	4	REQ	-	-	-	REQ	REQ	-	ADD2	ADD2
... in a performing arts theater	2.00	6	REQ	-	-	-	REQ	REQ	REQ	ADD2	ADD2
... all other lobbies	0.85	4	REQ	-	-	-	REQ	REQ	REQ	ADD2	ADD2
Locker Room Lounge/Breakroom	0.75	6	REQ	ADD1	ADD1	REQ	REQ	REQ	-	REQ	-
... in a healthcare facility	0.78	6	REQ	ADD1	ADD1	REQ	REQ	REQ	-	REQ	-
... all other lounges/breakrooms	0.62	4	REQ	ADD1	ADD1	REQ	REQ	REQ	-	REQ	-
Office ... enclosed and <250 ft 2	1.05	8	REQ	ADD1	ADD1	REQ	REQ	REQ	-	REQ	-
... enclosed and >250 ft²	1.05	8	REQ	ADD1	ADD1	REQ	REQ	REQ	-	ADD2	ADD2
... open plan	0.93	4	REQ	ADD1	ADD1	REQ	REQ	REQ	-	ADD2	ADD2
Parking Area, Interior	0.19	4	See	Section 9.4.1.2	...
Pharmacy Area	1.68	6	REQ	ADD1	ADD1	REQ	REQ	REQ	-	ADD2	ADD2
Restroom
... in a facility for the visually impaired (and not used primarily by the staff)³	1.21	8	REQ	-	-	-	REQ	REQ	-	REQ	-
... all other restrooms	0.98	8	REQ	-	-	-	REQ	REQ	-	REQ	-
Sales Area⁴	1.36	6	REQ	ADD1	ADD1	REQ	-	REQ	-	ADD2	ADD2
Seating Area, General	0.54	4	REQ	ADD1	ADD1	-	REQ	REQ	-	ADD2	ADD2
Stairway	The space	containing the stair	way shall determ	ine the LPD an	d control requir	ements for the s	tairway.
Stairwell	0.69	10	REQ	-	-	REQ	REQ	REQ	REQ	ADD2	ADD2
Storage Room
... <50 ft²	1.24	6	REQ	-	-	-	-	-	-	ADD2	ADD2
... >50 ft 2 and < 1000 ft 2	0.63	6	REQ	ADD1	ADD1	-	REQ	REQ	-	REQ	-
... all other storage rooms	0.63	6	REQ	ADD1	ADD1	-	REQ	REQ	REQ	ADD2	ADD2
Vehicular Maintenance Area	0.67	4	REQ	ADD1	ADD1	REQ	REQ	REQ	-	ADD2	ADD2
Workshop	1.59	6	REQ	ADD1	ADD1	REQ	REQ	REQ	-	ADD2	ADD2
Facility for the Visually Impaired³ ... in a chapel (used primarily by residents)	2.21	4	REQ	ADD1	ADD1	REQ	REQ	REQ	-	ADD2	ADD2
... in a recreation room/common living room (and not used primarily by staff)	2.41	6	REQ	ADD1	ADD1	REQ	REQ	REQ	-	ADD2	ADD2
Automotive (See "Vehicular Maintenance Area") Convention Center- Exhibit Space	1.23	4	REQ	ADD1	ADD1	REQ	REQ	REQ	-	ADD2	ADD2
Dormitory-Living Quarters Fire	0.38	8	REQ	-	-	-	-	-	-	-	-
Station-Sleeping Quarters Facility	0.22	6	REQ	-	-	-	-	-	-	-	-
for the Visually Impaired ³
Gymnasium/Fitness Center
... in an exercise area	0.61	4	REQ	ADD1	ADD1	REQ	REQ	REQ	-	ADD2	ADD2
... in a playing area	1.20	4	REQ	ADD1	ADD1	REQ	REQ	REQ	-	ADD2	ADD2
Healthcare Facility
... in an exam/treatment room	1.41	8	REQ	-	-	REQ	REQ	REQ	-	ADD2	ADD2
... in an imaging room	1.51	6	REQ	-	-	REQ	-	-	-	ADD2	ADD2
....in a medical supply room	0.66	6	(	See "Storage R	oom" under "Co	mmon Space T	ypes" for control	requirements)
... in a nursery	0.74	6	REQ	-	-	REQ	REQ	REQ	-	ADD2	ADD2
... in a nurse's station	0.63	6	REQ	-	-	REQ	REQ	REQ	-	ADD2	ADD2
... in an operating room	2.48	6	REQ	-	-	REQ	-	-	-	ADD2	ADD2
... in a patient room	0.55	6	REQ	-	-	REQ	REQ	REQ	-	ADD2	ADD2
... in a physical therapy room	0.77	6	REQ	-	-	REQ	REQ	REQ	-	ADD2	ADD2
... in a recovery room Library	1.15	6	REQ	-	-	REQ	REQ	REQ	-	ADD2	ADD2
... in a reading area	1.06	4	REQ	ADD1	ADD1	REQ	REQ	REQ	-	ADD2	ADD2
... in the stacks	1.62	4	REQ	ADD1	ADD1	REQ	REQ	REQ	REQ	ADD2	ADD2
Manufacturing Facility
... in a detailed manufacturing area	1.29	4	REQ	ADD1	ADD1	REQ	REQ	REQ	-	ADD2	ADD2
... in an equipment room	0.74	6	REQ	ADD1	ADD1	REQ	REQ	REQ	-	ADD2	ADD2
... in an extra high bay area (>50 ft floor-to-ceiling height)	1.05	4	REQ	ADD1	ADD1	REQ	REQ	REQ	-	ADD2	ADD2
... in a high bay area (25-50 ft floor-to-ceiling height)	1.04	4	REQ	ADD1	ADD1	REQ	REQ	REQ	-	ADD2	ADD2
... in a low bay area (<25 ft floor-to-ceiling height)	1.01	4	REQ	ADD1	ADD1	REQ	REQ	REQ	-	ADD2	ADD2
Museum ... in a general exhibition area	1.05	6	REQ	ADD1	ADD1	REQ	REQ	REQ	-	ADD2	ADD2
... in a restoration room	1.02	6	REQ	ADD1	ADD1	REQ	REQ	REQ	-	ADD2	ADD2
Performing Arts Theater- Dressing Room	0.61	6	REQ	ADD1	ADD1	REQ	REQ	REQ	-	REQ	-
Post Office-Sorting Area Religious Buildings	0.94	4	REQ	ADD1	ADD1	REQ	REQ	REQ	REQ	ADD2	ADD2
... in a fellowship hall	0.64	4	REQ	ADD1	ADD1	REQ	REQ	REQ	-	ADD2	ADD2
... in a worship/pulpit/choir area	1.53	4	REQ	ADD1	ADD1	REQ	REQ	REQ	-	ADD2	ADD2
Retail Facilities
... in a dressing/fitting room	0.71	8	REQ	ADD1	ADD1	REQ	REQ	-	REQ	-
... in a mall concourse	1.10	4	REQ	ADD1	ADD1	REQ	REQ	REQ	-	ADD2	ADD2
Sports Arena-Playing Area
... for a Class I facility	3.68	4	REQ	ADD1	ADD1	REQ	REQ	REQ	-	ADD2	ADD2
... for a Class II facility	2.40	4	REQ	ADD1	ADD1	REQ	REQ	REQ	-	ADD2	ADD2
... for a Class III facility	1.80	4	REQ	ADD1	ADD1	REQ	REQ	REQ	-	ADD2	ADD2
... for a Class IV facility	1.20	4	REQ	ADD1	ADD1	REQ	REQ	REQ	-	ADD2	ADD2
Transportation Facility
... in a baggage/carousel area	0.47	4	REQ	ADD1	ADD1	-	REQ	REQ	-	ADD2	ADD2
... in an airport concourse	0.32	4	REQ	ADD1	ADD1	-	REQ	REQ	-	ADD2	ADD2
... at a terminal ticket counter	0.68	4	REQ	ADD1	ADD1	REQ	REQ	REQ	-	ADD2	ADD2
Warehouse-Storage Area
...for medium to bulky, palletized items	0.49	4	REQ	ADD1	ADD1	REQ	REQ	REQ	REQ	ADD2	ADD2
... for smaller, hand-carried items⁵	0.95	6	REQ	ADD1	ADD1	REQ	REQ	REQ	REQ	ADD2	ADD2

1. In cases where both a common space type and a building area specific space type are listed, the building area specific space type shall apply

2. In corridors, the extra lighting power density allowance is permitted when the width of the corridor is less than 8 ft and is not based on the RCR.

3. A "Facility for the Visually Impaired" is a facility that can be documented as being designed to comply with the light levels in ANSI/IES RP-28 and is licensed or will be licensed by local/state authorities for either senior long-term care, adult daycare, senior support and/or people with special visual needs.

4. For accent lighting, see Section 9.6.2(b).

5. Sometimes referred to as a "Picking Area."

6. Automatic daylight responsive controls are mandatory only if the requirements of the specified sections are present.

7. An additional 0.53 w/ft2 shall be allowed, provided that the additional lighting is controlled separately from the base allowance of 0.42 W/ft2. The additional 0.53 w/ft2 allowance shall not be used for any other purpose.

TABLE 9.6.3 Control Factors Used in Calculating Additional Interior Lighting Power Allowance

Space Type
Additional Control Method (in Addition to Mandatory Requirements)	Open Office	Private Office	Conference Room, Meeting Room, Classroom (Lecture/ Training)	Retail Sales Area	Lobby, Atrium, Dining Area, Corridors/ Stairways, Gym/ Pool, Mall Concourse, Parking Garage
Manual, continuous dimming control or programmable multilevel dimming control	0.05	0.05	0.10	0.10	0
Programmable multilevel dimming control using programmable time scheduling	0.05	0.05	0.10	0.10	0.10
Occupancy sensors controlling the downlight component of workstation specific luminaires with continuous dimming to off capabilities	0.25^a	0	0	0	0
Occupancy sensors controlling the downlight component of
workstation specific luminaires with continuous dimming to off operation, in combination with personal continuous dimming control of downlight illumination by workstation occupant	0.30^a,b	0	0	0	0
Automatic continuous daylight dimming in secondary sidelighted areas	0.10^c	0.10^c	0.10^c	0.10^c	0.10^c

a. Control factor is limited to workstation-specific luminaires in partitioned single occupant work spaces contained within an open office environment (i.e. direct-indirect luminaires with separately controlled downlight and uplight components, with the downward component providing illumination to a single occupant in an open plan workstation). Within 30 minutes of the occupant leaving the space, the downward component shall continuously dim to off over a minimum of two minutes. Upon the occupant entering the space, the downward component shall turn on at the minimum level and continuously raise the illumination to a preset level over a minimum of 30 seconds. The uplight component of workstation specific luminaire shall comply with Section 9.4.1.1(h) (automatic full off).

b. In addition to the requirements described in footnote (b), the control shall allow the occupant to select their preferred light level via a personal computer, handheld device, or similarly accessible device located within the workstation.

c. Control factors may not be used if controls are used to satisfy exceptions to Section 5.5.4.2.3

Strike Section 9.6.2 of ASHRAE 90.1 in its entirety and insert a new Section 9.6.2 in its place in the Energy Conservation Code-Commercial Provisions to read as follows:

9.6.2

Additional Interior Lighting Power. When using the Space-by-Space Method, an increase in the interior lighting power allowance is allowed for specific lighting functions. Additional power shall be allowed only if the specified lighting is installed and automatically controlled, separately from the general lighting, to be turned off during nonbusiness hours. This additional power shall be used only for the specified luminaires and shall not be used for any other purpose unless otherwise indicated.

An increase in the interior lighting power allowance is permitted in the following cases:

a. For spaces in which lighting is specified to be installed in addition to the general lighting for the purpose of decorative appearance or for highlighting art or exhibits, provided that the additional lighting power shall not exceed 5% of the lighting power allowance across the entire project space permitted in Sections 9.5.1 or 9.6.1.

b. For lighting equipment installed in sales areas and specifically designed and directed to highlight merchandise, calculate the additional lighting power as follows:

+ (For Retail Area 2, 10% base power allowance for the sales area per Table 9.5.1 or Table 9.6.1)

+ (For Retail Area 3, 30% base power allowance for the sales area per Table 9.5.1 or Table 9.6.1)

+ (For Retail Area 4, 50% base power allowance for the sales area per Table 9.5.1 or Table 9.6.1),

Retail Area 1 = the floor area for all products not listed in Retail Areas 2, 3, or 4

Retail Area 2 = the floor area used for the sale of vehicles, sporting goods, and small electronics

Retail Area 3 = the floor area used for the sale of furniture, clothing, cosmetics, and artwork

Retail Area 4 = the floor area used for the sale of jewelry, crystal, and china

Exception: Other merchandise categories may be included in Retail Areas 2 through 4 above, provided that justification documenting the need for additional lighting power based on visual inspection, contrast, or other critical display is approved by the authority having jurisdiction.

Strike Section 9.6.3 of ASHRAE 90.1 in its entirety and insert a new Section 9.6.3 in its place to read as follows:

9.6.3

Prescriptive Controls.Building projects shall comply with the prescriptive control requirements of 9.5.2, 9.5.3, 9.5.4, and 9.5.5.

D.C. Mun. Regs. tit. 12, 12-I9.6

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