The Information contained on this web page has been collected and presented as a guide. It should be used as a guide only and should not be relied upon as the sole source of information relating to ventilation requirements or legal requirements in any state or municipality. No warranty, either express or implied, is made with respect to the information contained herein. For additional information contact the specific state or municipality to obtain specific technical or legal ventilating requirements that may apply. Empire Ventilation Equipment Co., Inc. is not responsible for any loss, inconvenience, damage (whether special or consequential) or claims arising out of the use of the information contained on this page.
1.12- L. Mechanical Requirements: All spaces intended for occupancy shall be provided with either natural or
mechanical ventilation. (Building)
1. Spaces intended to be naturally ventilated shall be provided with openable doors, windows,
louvers, or other openings to the outdoors. The minimum openable area to the outdoors shall be 4
percent of the floor area being ventilated. Where rooms without openings to the outdoors are
ventilated through an adjoining room, the unobstructed opening to the adjoining room shall be at
least 8 percent of the floor area of the interior room or space, but not less than 25 square feet. The
ventilation openings to the outdoors shall be based on the total floor area being ventilated.
2. Mechanically ventilated spaces shall comply with the following:
i. Newly installed HVAC systems shall comply with the requirements of ASHRAE 62-89.
ii. Existing systems that are altered or extended shall not reduce the amount of outside air below
the existing rate per person or the rate included in ASHRAE 62-89, whichever is lower. As a
minimum, mechanically ventilated spaces shall be provided with 5 CFM per person of
outdoor air and 15 CFM of ventilation air per person unless the indoor air quality procedure
of ASHRAE 62-89 is followed and results in a lesser amount.
3. All newly-introduced devices, equipment or operations that produce airborne particulates, odors,
fumes, sprays, vapors, smoke or gases in such quantities to be irritating or injurious to health shall
be provided with local exhaust.
m. Interior finishes shall comply with 1.11.c. (Plan review - Building, Fire. Inspection - Building)
n. Specific Occupancy Areas: Specific occupancy areas within the work area, as listed in Section
1.30.h, shall comply with the requirements established in that section for separation and/or
o. Fireblocking and draftstopping: When the work being performed exposes the framing of any wall,
floor, ceiling or roof, the exposed framing shall comply with Section 716 of the North Carolina