D.C. Mun. Regs. tit. 12, 12-I9.5

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

Section 12-I9.5 - BUILDING AREA METHOD COMPLIANCE PATH

9.5.1

Building Area Method Compliance Path

Strike Table 9.5.1 in ASHRAE 90.1 in its entirety and insert new Table 9.5.1 in its place in the Energy Conservation Code-Commercial Provisions to read as follows:

TABLE 9.5.1 LIGHTING POWER DENSITIES USING THE BUILDING AREA METHOD

Building Area Type^a	LPD, W/ft²
Automotive facility	0.80
Convention center	1.01
Courthouse	0.95
Dining: Bar lounge/leisure	1.01
Dining: Cafeteria/fast food	0.85
Dining: Family	0.90
Dormitory	0.54
Exercise center	0.79
Fire station	0.67
Gymnasium	0.94
Health-care clinic	0.85
Hospital	0.99
Hotel/Motel	0.87
Library	1.13
Manufacturing facility	1.17
Motion picture theater	0.76
Multifamily	0.48
Museum	1.02
Office	0.77
Parking garage	0.21
Penitentiary	0.76
Performing arts theater	1.39
Police station	0.82
Post office	0.87
Religious building	0.95
Retail	1.26
School/university	0.78
Sports arena	0.91
Town hall	0.84
Transportation	0.66
Warehouse	0.66
Workshop	1.19

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

Insert a new Section 9.5.2 in the Energy Conservation Code-Commercial Provisions to read as follows:

9.5.2

Prescriptive Control Requirements

9.5.2.1

Automatic Control of Lights in Group R-1 Occupancies. In Group R-1 occupancies with more than 50 guest rooms, automatic controls for the lighting shall be configured according to the following requirements.

9.5.2.1.1

Lighting and Switched Outlet Control. Within 30 minutes of all occupants leaving the guest room, power for lighting shall be automatically turned off.

9.5.2.2

Occupancy Sensor Controls with Multilevel Switching or Dimming. The lighting in commercial and industrial storage stack areas shall be controlled by an occupant sensor with multilevel switching or dimming system that reduces lighting power a minimum of 50% within 20 minutes of all occupants leaving the stack area.

Exception: Storage stack areas illuminated by high- intensity discharge (HID) lighting with a lighting power density of 0.8 W/ft (8.6 W/m) or less.

9.5.2.3

Automatic Controls for Egress and Security Lighting. Lighting in any area within a building that is required to be continuously illuminated for reasons of building security or emergency egress shall not exceed 0.1 W/ft (1 W/m). Additional egress and security lighting shall be allowed, provided it is controlled by an automatic control device that turns off the additional lighting.

9.5.2.4

Controls for Exterior Sign Lighting. All exterior sign lighting, including internally illuminated signs and lighting on externally illuminated signs, shall comply with the requirements of Sections 9.5.2.4.1 or 9.5.2.4.2.

Exceptions:

1. Sign lighting that is specifically required by a health or life safety statute, ordinance, or regulation.

2. Signs in tunnels.

9.5.2.4.1

All sign lighting that operates more than one hour per day during daylight hours shall include controls to automatically reduce the input power to a maximum of 35% of full power for a period from one hour after sunset to one hour before sunrise.

Exception: Sign lighting using metal halide, high-pressure sodium, induction, cold cathode, or neon lamps that includes controls to automatically reduce the input power to a maximum of 70% of full power for a period from one hour after sunset to one hour before sunrise.

9.5.2.4.2

All other sign lighting shall include the following:

a. Controls to automatically reduce the input power to a maximum of 70% of full power for a period from mid- night or within one hour of the end of business operations, whichever is later, until 6:00 am or business opening, which- ever is earlier.

b. Controls to automatically turn off during daylight hours.

D.C. Mun. Regs. tit. 12, 12-I9.5

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