NOTE: Section 160.2 is not applicable to townhouses or dwellings that contain two dwelling units.
EXCEPTION to 160.2(b)1Bi: For heat recovery ventilators and energy recovery ventilators the location of the filters required by Section 160.2(b)1 may be downstream of a system thermal conditioning component, provided the system is equipped with ancillary filtration upstream of the system’s thermal conditioning component.
Systems specified in Section 160.2(b)1Ai shall be equipped with air filters that meet either Subsection a or b below:
Aface = Qfilter / Vface
Where:
Aface = air filter face area, the product of air filter nominal length x nominal width, ft2
Qfilter = design airflow rate for the air filter, ft3/min
Vface = air filter face velocity ≤ 150 ft/min
EXCEPTION to 160.2(b)1: Evaporative coolers are exempt from the air filtration requirements in Section 160.2(b)1.
EXCEPTION to Section 160.2(b)2: The following sections of ASHRAE 62.2 shall not be required for compliance: Section 4.1.1, Section 4.1.2; Section 4.1.4; Section 4.3; Section 4.6, Section 5, Section 6.1.1, Section 6.5.2, and Normative Appendix A.
EXCEPTION to Section 160.2(b)2Aiia: The Energy Commission may approve continuous operation of central fan integrated ventilation systems pursuant to Section 10-109(h).
Total Required Ventilation Rate [ASHRAE 62.2:4.1.1].
Equation 160.2-B
Qtot = 0.03Afloor + 7.5(Nbr + 1)
WHERE:
Qtot = total required ventilation rate, cfm
Afloor = dwelling-unit floor area, ft2
Nbr = number of bedrooms (not to be less than 1)
When using Table 160.2-H for demonstrating compliance, the airflow rating shall be greater than or equal to the value required by Section 160.2(b)2Avi at a static pressure greater than or equal to 0.25 in. of water (62.5 Pa). When a vented range hood utilizes a capture efficiency rating to demonstrate compliance with Section 160.2(b)2Avic2, a static pressure greater than or equal to 0.25 in. of water at the rating point shall not be required, and the airflow listed in the approved directory corresponding to the compliant capture efficiency rating point shall be applied to Table 160.2-H for determining compliance.
Use of Table 160.2-H is limited to ventilation systems that conform to all of the following three specifications:
EXCEPTION to Section 160.2(b)2Avif: Kitchen range hoods may be rated for sound at a static pressure determined at working speed as specified in HVI 916 Section 7.2.
EXCEPTION to Section 160.2(c)1A: For heat recovery ventilators and energy recovery ventilators the location of the filters required by Section 160.2(c)1A may be downstream of a system’s thermal conditioning component, provided the system is equipped with ancillary filtration upstream of the system’s thermal conditioning component.
EXCEPTION 1 to 160.2(c)2: The mechanical ventilation system shall not be required where natural ventilation openings complying with Section 160.2(c)2 are either permanently open or have controls that prevent the openings from being closed during periods of expected occupancy.
EXCEPTION 2 to Section 160.2(c)2: The mechanical ventilation system shall not be required where the zone is not served by a space-conditioning system.
EXCEPTION to Section 160.2(c)2Aiv: For ceilings that are increasing in height as distance from the opening is increased, the ceiling height shall be determined as the average height of the ceiling within 20 feet from the operable openings. [ASHRAE 62.1:6.4.1.4]
Vz = Ra x Az
Where:
Ra = Outdoor airflow rate required per unit area as determined from Table 160.2-B.
Az = Zone floor area is the net occupiable floor area of the ventilation zone in square feet.
Vz = Rp x Pz
Where:
Rp = 15 cubic feet per minute of outdoor airflow per person
Pz = The expected number of occupants. The expected number of occupants shall be the expected number specified by the building designer. For spaces with fixed seating, the expected number of occupants shall be determined in accordance with the California Building Code.
EXCEPTION to Section 160.2(c)3: Transfer air. The rate of outdoor air required by Section 160.2(c)3 may be provided with air transferred from other ventilated space if:
EXCEPTION 1 to Section 160.2(c)5A: Demand control ventilation. In intermittently occupied spaces that do not have processes or operations that generate dusts, fumes, mists, vapors or gases and are not provided with local exhaust ventilation (such as indoor operation of internal combustion engines or areas designated for unvented food service preparation), the rate of outdoor air may be reduced if the ventilation system serving the space is controlled by a demand control ventilation device complying with Section 160.2(c)5D or by an occupant sensor ventilation control device complying with Section 160.2(c)5E.
EXCEPTION 2 to Section 160.2(c)5A: Temporary reduction. The rate of outdoor air provided to a space may be reduced below the level required by Section 160.2(c) for up to 30 minutes at a time if the average rate for each hour is equal to or greater than the required ventilation rate.
EXCEPTION 1 to Section 160.2(c)5C: Where space exhaust is greater than the design ventilation rate specified in Section 160.2(c)3 minus 0.2 cfm per ft² of conditioned area.
EXCEPTION 2 to Section 160.2(c)5C: Spaces that have processes or operations that generate dusts, fumes, mists, vapors, or gases and are not provided with local exhaust ventilation, such as indoor operation of internal combustion engines or areas designated for unvented food service preparation, daycare sickrooms, science labs, barber shops or beauty and nail salons shall not install demand control ventilation.
EXCEPTION 3 to Section 160.2(c)5C: Spaces with an area of less than 150 square feet, or a design occupancy of less than 10 people as specified by Section 160.2(c)3.
EXCEPTION to Section 160.2(c)5Diii: The outdoor air ventilation rate is not required to be larger than the design outdoor air ventilation rate required by Section 160.2(c)3 regardless of CO2 concentration.
EXCEPTION to Section 160.2(c)8Bv: When using any energy recovery device, recirculation from leakage, carryover, or transfer from the exhaust side of the energy recovery device is permitted. Recirculated Class 2 air shall not exceed 10% of the outdoor air intake flow.
EXCEPTION to Section 160.2(c)8Cii: When using any energy recovery device, recirculation from leakage, carryover, or transfer from the exhaust side of the energy recovery device is permitted. Recirculated Class 3 air shall not exceed 5 percent of the outdoor air intake flow.
TMY3
|
wsf
|
Weather Station
|
Latitude
|
Longitude
|
State
|
690150
|
0.50
|
Twentynine Palms
|
34.30
|
–116.17
|
California
|
722860
|
0.43
|
March AFB
|
33.90
|
–117.25
|
California
|
722868
|
0.45
|
Palm Springs Intl
|
33.83
|
–116.50
|
California
|
722869
|
0.42
|
Riverside Muni
|
33.95
|
–117.45
|
California
|
722880
|
0.39
|
Burbank–Glendale–Pasadena AP
|
34.20
|
–118.35
|
California
|
722885
|
0.39
|
Santa Monica Muni
|
34.02
|
–118.45
|
California
|
722886
|
0.39
|
Van Nuys Airport
|
34.22
|
–118.48
|
California
|
722895
|
0.55
|
Lompoc (AWOS)
|
34.67
|
–120.47
|
California
|
722897
|
0.51
|
San Luis Co Rgnl
|
35.23
|
–120.63
|
California
|
722899
|
0.45
|
Chino Airport
|
33.97
|
–117.63
|
California
|
722900
|
0.38
|
San Diego Lindbergh Field
|
32.73
|
–117.17
|
California
|
722903
|
0.39
|
San Diego/Montgomery
|
32.82
|
–117.13
|
California
|
722904
|
0.40
|
Chula Vista Brown Field NAAS
|
32.58
|
–116.98
|
California
|
722906
|
0.39
|
San Diego North Island NAS
|
32.70
|
–117.20
|
California
|
722926
|
0.40
|
Camp Pendleton MCAS
|
33.30
|
–117.35
|
California
|
722927
|
0.38
|
Carlsbad/Palomar
|
33.13
|
–117.28
|
California
|
722930
|
0.39
|
San Diego Miramar NAS
|
32.87
|
–117.13
|
California
|
722950
|
0.42
|
Los Angeles Intl Arpt
|
33.93
|
–118.40
|
California
|
722956
|
0.38
|
Jack Northrop Fld H
|
33.92
|
–118.33
|
California
|
722970
|
0.38
|
Long Beach Daugherty Fld
|
33.83
|
–118.17
|
California
|
722976
|
0.34
|
Fullerton Municipal
|
33.87
|
–117.98
|
California
|
722977
|
0.36
|
Santa Ana John Wayne AP
|
33.68
|
–117.87
|
California
|
723805
|
0.51
|
Needles Airport
|
34.77
|
–114.62
|
California
|
723810
|
0.59
|
Edwards AFB
|
34.90
|
–117.87
|
California
|
723815
|
0.58
|
Daggett Barstow–Daggett AP
|
34.85
|
–116.80
|
California
|
723816
|
0.62
|
Lancaster Gen Wm Fox Field
|
34.73
|
–118.22
|
California
|
723820
|
0.57
|
Palmdale Airport
|
34.63
|
–118.08
|
California
|
723830
|
0.68
|
Sandberg
|
34.75
|
–118.72
|
California
|
723840
|
0.43
|
Bakersfield Meadows Field
|
35.43
|
–119.05
|
California
|
723890
|
0.45
|
Fresno Yosemite Intl AP
|
36.78
|
–119.72
|
California
|
723895
|
0.42
|
Porterville (AWOS)
|
36.03
|
–119.07
|
California
|
723896
|
0.43
|
Visalia Muni (AWOS)
|
36.32
|
–119.40
|
California
|
723910
|
0.45
|
Point Mugu Nf
|
34.12
|
–119.12
|
California
|
723925
|
0.44
|
Santa Barbara Municipal AP
|
34.43
|
–119.85
|
California
|
723926
|
0.43
|
Camarillo (AWOS)
|
34.22
|
–119.08
|
California
|
723927
|
0.45
|
Oxnard Airport
|
34.20
|
–119.20
|
California
|
723940
|
0.52
|
Santa Maria Public Arpt
|
34.92
|
–120.47
|
California
|
723965
|
0.53
|
Paso Robles Municipal Arpt
|
35.67
|
–120.63
|
California
|
724800
|
0.55
|
Bishop Airport
|
37.37
|
–118.35
|
California
|
724815
|
0.46
|
Merced/Macready Fld
|
37.28
|
–120.52
|
California
|
724830
|
0.51
|
Sacramento Executive Arpt
|
38.50
|
–121.50
|
California
|
724837
|
0.45
|
Beale AFB
|
39.13
|
–121.43
|
California
|
724838
|
0.50
|
Yuba Co
|
39.10
|
–121.57
|
California
|
724839
|
0.51
|
Sacramento Metropolitan AP
|
38.70
|
–121.58
|
California
|
724915
|
0.49
|
Monterey Naf
|
36.60
|
–121.87
|
California
|
724917
|
0.54
|
Salinas Municipal AP
|
36.67
|
–121.60
|
California
|
724920
|
0.50
|
Stockton Metropolitan Arpt
|
37.90
|
–121.23
|
California
|
724926
|
0.47
|
Modesto City–County AP
|
37.63
|
–120.95
|
California
|
724927
|
0.53
|
Livermore Municipal
|
37.70
|
–121.82
|
California
|
724930
|
0.54
|
Oakland Metropolitan Arpt
|
37.72
|
–122.22
|
California
|
724935
|
0.47
|
Hayward Air Term
|
37.67
|
–122.12
|
California
|
724936
|
0.53
|
Concord–Buchanan Field
|
38.00
|
–122.05
|
California
|
724940
|
0.60
|
San Francisco Intl AP
|
37.62
|
–122.40
|
California
|
724945
|
0.48
|
San Jose Intl AP
|
37.37
|
–121.93
|
California
|
724955
|
0.55
|
Napa Co. Airport
|
38.22
|
–122.28
|
California
|
724957
|
0.49
|
Santa Rosa (AWOS)
|
38.52
|
–122.82
|
California
|
725845
|
0.44
|
Blue Canyon AP
|
39.30
|
–120.72
|
California
|
725846
|
0.66
|
Truckee–Tahoe
|
39.32
|
–120.13
|
California
|
725847
|
0.64
|
South Lake Tahoe
|
38.90
|
–120.00
|
California
|
725905
|
0.47
|
Ukiah Municipal AP
|
39.13
|
–123.20
|
California
|
725910
|
0.50
|
Red Bluff Municipal Arpt
|
40.15
|
–122.25
|
California
|
725920
|
0.47
|
Redding Municipal Arpt
|
40.52
|
–122.32
|
California
|
725945
|
0.56
|
Arcata Airport
|
40.98
|
–124.10
|
California
|
725946
|
0.60
|
Crescent City Faa Ai
|
41.78
|
–124.23
|
California
|
725955
|
0.55
|
Montague Siskiyou County AP
|
41.78
|
–122.47
|
California
|
725958
|
0.59
|
Alturas
|
41.50
|
–120.53
|
California
|
745090
|
0.45
|
Mountain View Moffett Fld NAS
|
37.40
|
–122.05
|
California
|
745160
|
0.67
|
Travis Field AFB
|
38.27
|
–121.93
|
California
|
746120
|
0.52
|
China Lake Naf
|
35.68
|
–117.68
|
California
|
747020
|
0.50
|
Lemoore Reeves NAS
|
36.33
|
–119.95
|
California
|
747185
|
0.46
|
Imperial
|
32.83
|
–115.58
|
California
|
747187
|
0.46
|
Palm Springs Thermal AP
|
33.63
|
–116.17
|
California
|
747188
|
0.48
|
Blythe Riverside Co Arpt
|
33.62
|
–114.72
|
California
|
Occupancy Category3 | Area Outdoor Air Rate1 Racfm/ft2 | Min Air Rate for DC cfm/ft2V2 | Air Class | Notes |
Daycare (through age 4) | 0.21 | 0.15 | 2 | |
Multiuse assembly | 0.50 | 0.15 | 1 | F |
Dining rooms | 0.50 | 0.15 | 2 | |
Bars, cocktail lounges | 0.50 | 0.20 | 2 | |
Kitchen (cooking) | 0.15 | 2 | ||
Break rooms | 0.50 | 0.15 | 1 | F |
Coffee stations | 0.50 | 0.15 | 1 | F |
Conference/meeting | 0.50 | 0.15 | 1 | F |
Corridors | 0.15 | 1 | F | |
Occupiable storage rooms for liquids or gels | 0.15 | 2 | B | |
Laundry rooms, central | 0.15 | 2 | ||
Lobbies/pre-function | 0.50 | 0.15 | 1 | F |
Breakrooms | 0.50 | 0.15 | ||
Occupiable storage rooms for dry materials | 0.15 | |||
Office space | 0.15 | 1 | ||
Reception areas | 0.15 | 1 | F | |
Telephone/data entry | 0.15 | 1 | F | |
Computer (not printing) | 0.15 | |||
Freezer and refrigerated spaces (<50 o F) | - | 1 | F | |
Shipping/receiving | 0.15 | |||
Gym, sports arena (play area) | 0.50 | 0.15 | 2 | E |
Swimming (pool) | 0.15 | 2 | C | |
Swimming (deck) | 0.50 | 0.15 | 2 | C |
Disco/dance floors | 1.50 | 0.15 | 2 | F |
Health club/aerobics room/weight rooms | 0.15 | 2 | ||
Game arcades | 0.68 | 0.15 | 1 | |
All others | 0.15 | |||
General: 1 Ra was determined as being the larger of the area method and the default per person method. The occupant density used in the per person method was assumed to be one half of the maximum occupant load assumed for egress purposes in the CBC. 2 If this column specifies a minimum cfm/ft2 then it shall be used to comply with Section 160.2(c)5E. 3 For spaces not included in this table, the spaces in Table 120.1-A shall apply. Specific Notes: A – RESERVED B – Rate may not be sufficient where stored materials include those having potentially harmful emissions. C – Rate does not allow for humidity control. “Deck area” refers to the area surrounding the pool that is capable of being wetted during pool use or when the pool is occupied. Deck area that is not expected to be wetted shall be designated as an occupancy category. D – RESREVED. E – Where combustion equipment is intended to be used on the playing surface or in the space, additional dilution ventilation, source control, or both shall be provided. F – Ventilation air for this occupancy category shall be permitted to be reduced to zero when the space is in occupied-standby mode. |
Occupancy Category3
|
Exhaust Rate, cfm/unit
|
Exhaust Rate, cfm/ft2
|
Air Class
|
Notes
|
Copy, printing rooms
|
-
|
0.50
|
2
|
|
Janitor closets, trash rooms, recycling
|
-
|
1.00
|
3
|
|
Kitchenettes
|
-
|
0.30
|
2
|
|
Kitchens – commercial
|
-
|
0.70
|
2
|
|
Locker rooms for athletic or industrial facilities
|
-
|
0.50
|
2
|
|
All other locker rooms
|
-
|
0.25
|
2
|
|
Shower rooms
|
20/50
|
-
|
2
|
G, H
|
Parking garages
|
-
|
0.75
|
2
|
C
|
Pet shops (animal areas)
|
-
|
0.90
|
2
|
|
Soiled laundry storage rooms
|
-
|
1.00
|
3
|
F
|
Storage rooms, chemical
|
-
|
1.50
|
4
|
F
|
Toilets – private
|
25/50
|
-
|
2
|
E
|
Toilets – public
|
50/70
|
-
|
2..
|
D
|
General:
3 For spaces not included in this table, the spaces in Table 120.1-B shall apply. Notes: A –Reserved B –Reserved C – Exhaust shall not be required where two or more sides comprise walls that are at least 50% open to the outside. D – Rate is per water closet, urinal, or both. Provide the higher rate where periods of heavy use are expected to occur. The lower rate shall be permitted to be used otherwise. E – Rate is for a toilet room intended to be occupied by one person at a time. For continuous systems operation during hours of use, the lower rate shall be permitted to be used. Otherwise the higher rate shall be used. F – See other applicable standards for exhaust rate. G – For continuous system operation, the lower rate shall be permitted to be used. Otherwise the higher rate shall be used. H – Rate is per showerhead. |
Description
|
Air Class
|
Commercial kitchen grease hoods
|
4
|
Commercial kitchen hoods other than grease
|
3
|
Hydraulic elevator machine room
|
2
|
Application | Compliance Criteria |
Enclosed Kitchen or Nonenclosed Kitchen | Vented range hood, including appliance-range hood combinations shall meet either the capture efficiency (CE) or the airflow rate specified in Table 160.2-G as applicable. |
Enclosed Kitchen | Other kitchen exhaust fans, including downdraft: 300 cfm (150 L/s) or a capacity of 5 ACH |
Nonenclosed Kitchen | Other kitchen exhaust fans, including downdraft: 300 cfm (150 L/s) |
Bathroom | 50 cfm (25 L/s) |
Application | Airflow |
Enclosed kitchen | 5 ach, based on kitchen volume |
Bathroom | 20 cfm (10 L/s) |
Ratings According to Dwelling Unit Floor Area and Kitchen Range Fuel Type
Dwelling Unit Floor Area (ft2 ) | Hood Over Electric Range | Hood Over Natural Gas Range |
>1500 | 50% CE or 110 cfm | 70% CE or 180 cfm |
>1000 - 1500 | 50% CE or 110 cfm | 80% CE or 250 cfm |
750 - 1000 | 55% CE or 130 cfm | 85% CE or 280 cfm |
<750 | 65% CE or 160 cfm | 85% CE or 280 cfm |
Fan Airflow Rating, cfm at minimum static pressuref 0.25 in. water (L/s at minimum 62.5 Pa) | ≤50 (25) | ≤80 (40) | ≤100 (50) | ≤ 125 (60) | ≤ 150 (70) | ≤ 175 (85) | ≤ 200 (95) | ≤ 250 (120) | ≤ 350 (165) | ≤400 (190) | ≤ 450 (210) | ≤ 700 (330) | ≤ 800 (380) |
Minimum Duct Diameter, in. (mm) a,b For Rigid duct | 4 e (100) | 5 (125) | 5 (125) | 6 (150) | 6 (150) | 7 (180) | 7 (180) | 8 (205) | 9 (230) | 10 (255) | 10 (255) | 12 (305) | 12 d (305) |
Minimum Duct Diameter, in. (mm) a,b For Flex duct c | 4 (100) | 5 (125) | 6 (150) | 6 (150) | 7 (150) | 7 (180) | 8 (205) | 8 (205) | 9 (230) | 10 (255) | NP | NP | NP |
Footnotes for Table 160.2-H: a. For noncircular ducts, calculate the diameter as four times the cross-sectional area divided by the perimeter. b. NP = application of the prescriptive table is not permitted for this scenario. c. Use of this table for verification of flex duct systems requires flex duct to be fully extended and any flex duct elbows to have a minimum bend radius to duct diameter ratio of 1.0. d. For this scenario, use of elbows is not permitted. e. For this scenario, 4 in. (100 mm) oval duct shall be permitted, provided the minor axis of the oval is greater than or equal to 3 in. (75 mm) f. When a vented range hood utilizes a capture efficiency rating to demonstrate compliance with 160.2(b)2Avic2, a static pressure greater than or equal to 0.25 in. of water at the rating point shall not be required, and the airflow listed in the approved directory corresponding to the compliant capture efficiency rating point shall be applied to Table 160.2-H for determining compliance. |
NOTE: Authority: Sections 25213, 25218, 25218.5, 25402 and 25402.1, Public Resources Code. Reference: Sections 25007, 25008, 25218.5, 25310, 25402, 25402.1, 25402.4, 25402.5, 25402.8, and 25943, Public Resources Code.