ad--2010-00079_0002.jpg VENTILATION
TABLE 403.3- continued TABLE 403.3- continued •
REQUIRED OUTDOOR VENTILATION AIR REQUIRED OUTDOOR VENTILATION AIR
ESTIMATED ESTIMATED
MAXIMUM OUTDOOR AIR MAXIMUM OUTDOOR AIR
OCCUPANT (Cubic feet per OCCUPANT (Cubic feet per
LOAD, PERSONS minute (cfm) LOAD, PERSONS minute (cfm)
OCCUPANCY PER 1,000 per person) OCCUPANCY PER 1,000 per person)
CLASSIFICATION SQUARE FEETa UNLESS NOTEDe CLASSIFICATION SQUARE FEETa UNLESS NOTED
Private dwellings, single and Specialty shops - continued
multiple 50 cfm
intermittent or 20
Garages, common for -
1.5 cfm/ft2 cfm continuous
multiple units Nail salon ' per station
Garages, separate for - 100 cfm per car Pet Shops - 1.00 cfm/ft
each dwelling
Reducing salons 20 15
Kitchensg - 100 cfm
intermittent or 25 Supermarkets 8 15
cfm continuous Sports and amusement
Ballrooms and discos 100 25
Living areas` Based upon Bowling alleys (seating areas 70 25
number of 0.35 air changes g Y ( g )
bedrooms. fast per hour or 15 cfm Game rooms 70 25 2
bedroom: s. each per person, Ice arenas - 0.50 cfm/ft
additional whichever is Playing floors (gymnasiums) 30 20
bedroom: 1 greater Spectator areas 150 15
Swimming pools (pool and deck
' Toilet rooms and - Mechanical
area) 0.50 cfm/f
bathroomsg• exhaust capacity of Storage
50 c in cfm Repair garages, enclosed
or -
parking garages 1.5 cfm/ft?
continuous Warehouses - 0.05 cfm/ft
Public spaces Theaters
Corridors and utilities - 0.05 cfm/ft Auditoriums 150 15 •
Elevator cars 1.00 cfm/ft Lobbies 150 20
Locker rooms 0.5 cfm1ft Stages, studios 70 15
Shower rooms 50 cfm Ticket booths 60 20
(per shower head)g• intermittent or 20
cfm continuous Transportation
Smoking lounges 70 60 Platforms
100 15
Toilet roomsg 75 cfm per water Vehicles 150 15
Waiting rooms 100 15
closet or urinal
Workrooms
Retail stores, sales floors and
Bank vaults 5 15
showroom floors Darkrooms - 0.50 cfm/ft
Basement and street - 0.30 cfm/f2 Duplicating, printing - 0.50 cfm/f0
Dressing rooms - 0.20 cfm/ft' 2 Meat processing` 10 15
Malls and arcades - 0.20 cfm/ft Pharmacy 20 15
Shipping and receiving - 0.15 cfm/ft Photo studios 10 15
Smoking lounges 70 60
Storage rooms - 0.15 cfm/ft For SI: 1 cubic foot per minute = 0.0004719 m /s, l ton = 908 kg,
Upper floors - 0.20 cfm/ft 1 cubic foot per minute per square foot = 0.00508 m /(s • m
Warehouses - 0.05 cfm/ft2 °C = [(°F) - 321/1.8, 1 square foot = 0.0929 m
a. Based upon net floor area.
Specialty shops b. Mechanical exhaust required and the recirculation of air from such spaces as
Automotive motor- permittedby Section403.2.1 isprohibited (see Section 403.2.1, Items 1 and 3).
fuel- dispensing stations - 1.5 cfm/ft c. Spaces unheated or maintained below 50 °F are not covered by these require -
Barber 25 15 ments unless the occupancy is continuous.
Beauty 25 25 d. Ventilation systems in enclosed parking garages shall comply with Section '
Clothiers, furniture - 0.30 cfm1f1? 404.
' Embalm /ft
Embalming room 2.0 cfm e. Where the ventilation rate is expressed in cfm/ft such rate is based upon
Florists 8 15 cubic feet per minute per square foot of the floor area being ventilated.
Hardware, drugs, fabrics 8 15 f. The sum of the outdoor and transfer air from adjacent spaces shall be suffi-
cient to provide an exhaust rate of not less than 1.5 cfm/ft
g. Transfer air permitted in accordance with Section 403.2.2.
h. Mechanical exhaust is required and recirculation is prohibited except that
recirculation shall be permitted where the resulting supply airstream con -
(continued) sists of not more than 10 percent air recirculated from these spaces (see Sec-
tion 403.2.1, Items 2 and 4).
i. The required exhaust system shall capture the contaminants and odors at
their source.
32 2006 INTERNATIONAL MECHANICAL CODE"