D.C. Mun. Regs. tit. 25, r. 25-C502
Equipment rooms shall have either forced draft or cross ventilation.
All below grade equipment rooms shall have a stairway access with forced draft ventilation or a fully louvered door and louvered vent on at least one other side.
Where stairway access is not necessary to carry heavy items into the below grade room or vault, a "ship's ladder" may be used if approved by the Department.
The opening to an equipment room shall be a minimum of three feet by six feet (3 ft. x 6 ft.) and shall provide easy access to the equipment.
A hose bibb with vacuum breaker shall be located in the equipment room.
A carbon monoxide detector with local alarming, listed and labeled in accordance with UL Standard 2075, shall be installed in all equipment rooms and rooms adjacent to spaces containing fuel-burning equipment or vents carrying the products of combustion.
D.C. Mun. Regs. tit. 25, r. 25-C502