Statutes, codes, and regulations
District Of Columbia Administrative Code
Title 25 - FOOD OPERATIONS AND COMMUNITY HYGIENE FACILITIESSubtitle 25-E - BARBERING, COSMETOLOGY, AND PERSONAL GROOMING FACILITY REGULATIONS
Chapter 25-E3 - STRUCTURE, DESIGN, OPERATING SYSTEMS, AND MAINTENANCE
Rule 25-E309 - OPERATING SYSTEMS AND DESIGN - MECHANICAL AND VENTILATION SYSTEMS, DESIGN AND OPERATION, BALANCING AND LOCATION

D.C. Mun. Regs. tit. 25, r. 25-E309

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Current through Register Vol. 71, No. 49, December 6, 2024
Rule 25-E309 - OPERATING SYSTEMS AND DESIGN - MECHANICAL AND VENTILATION SYSTEMS, DESIGN AND OPERATION, BALANCING AND LOCATION
309.1

Mechanical and ventilation systems, including but not limited to furnaces, gas- or oil-fired room heaters, and water heaters in barber, cosmetology, and personal grooming facilities shall comply with the most recent versions of the District of Columbia Construction Codes, as specified in § 102.1(g)(2), and other applicable District laws and regulations.

309.2

All barber and cosmetology facilities shall have sufficient tempered make-up air and exhaust ventilation to keep them free of excessive heat, steam, condensation, vapors, obnoxious odors, smoke, and fumes.

309.3

All personal grooming facilities shall allow for circulation of air sufficient to eliminate odors in accordance with § 102.1(g)(2).

309.4

All rooms in a barber, cosmetology, and personal grooming facilities shall be provided with at least eight (8) air changes per hour. Recirculation of air is not permitted.

309.5

Nail salons, including nail work stations within a cosmetology, or personal grooming facility that provide manicure and/or pedicure services shall be equipped with an independent exhaust or mechanical ventilation system at the source capture system to remove fumes and dust from nail stations directly to the exterior of the building and shall not be recirculated into any space. Make-up air is required and shall be considered for the entire mechanical exhaust ventilation system design, as specified in § 309.6 and Table A in § 309.7.

309.6

An independent source capture system exhaust and mechanical ventilation system shall be located at each nail station with an interlocking exhaust system and light switch to ensure the exhaust system is fully operational when nail station activities are occurring.

309.7

The minimum flow rate of outdoor air that the ventilation system must be capable of supplying during its operation shall be based on the rate per person, and the actual number of occupants' present, as specified in Table A:

TABLE A

OCCUPANCY CLASSIFICATION

OCCUPANT DENSITY #/1000 FT2a

PEOPLE OUTDOOR AIRFLOW RATE IN BREATHING ZONE,RpCFM/PERSON

AREA OUTDOOR AIRFLOW RATE IN BREATHING ZONE,RaCFM/FT2a

EXHAUST AIRFLOW RATE CFM/FT2

Barber

25

7.5

0.06

0.5

Beauty salonsb

25

20

0.12

0.6

Nail salons b, h

25

20

0.12

0.6

For SI: 1 cubic foot per minute = 0.0004719 m3/s, 1 ton = 908 kg, 1 cubic foot per minute per square foot = 0.00508 m3/(s ·m2),°C =[(°F)-32]/1.8, 1 square foot = 0.0929 m2.

a. Based upon net occupiable floor area .
b. Mechanical exhaust required and the recirculation of air from such spaces is prohibited. Recirculation of air that is contained completely within such spaces shall not be prohibited (see Section 403.2.1 of the International Mechanical Code , Item 3).
1. Where mechanical exhaust is required by Note b in Table A , recirculation of air from such spaces shall be prohibited. All air supplied to such spaces shall be exhausted, including any air in excess of that required by Table A .
c. Spaces unheated or maintained below 50°F are not covered by these requirements unless the occupancy is continuous.
d. Rates are per water closet or urinal. The higher rate shall be provided where the exhaustsystem is designed to operate intermittently. The lower rate shall be permitted only where the exhaust system is designed to operate continuously while occupied.
e. Rates are per room unless otherwise indicated. The higher rate shall be provided where the exhaust system is designed to operate intermittently. The lower rate shall be permitted only where the exhaust system is designed to operate continuously while occupied.
f. Mechanical exhaust is required, and recirculation is prohibited.
g. For nail salons, manicure and pedicure stations shall be provided with a source capturesystemcapable of exhausting not less than 50 cfm per station. Exhaust inlets shall be located in accordance with Section 502.20 of the International Mechanical Code . Where one or more required source capture systems operate continuously during occupancy , the exhaust rate from such systems shall be permitted to be applied to the exhaust flow rate required by Table A for the nail salon.

D.C. Mun. Regs. tit. 25, r. 25-E309

Final Rulemaking published at 68 DCR 13026 (12/10/2021)