Single-family residential buildings shall comply with the applicable requirements of Sections 150(a) through 150.0(v).
NOTE: The requirements of Sections 150.0(a) through 150.0(r) apply to newly constructed buildings. Sections 150.2(a) and 150.2(b) specify which requirements of Sections 150.0(a) through 150.0(r) also apply to additions or alterations.
The opaque portions of roof decks separating attic spaces from ambient air, and ceilings or rafter roofs separating conditioned spaces from unconditioned spaces or ambient air shall meet the requirements of Items 1 through 4 below:
EXCEPTION to Section 150.0(a)1:
EXCEPTION to Section 150.0(a)2: Ceilings and rafter roofs in an alteration shall be insulated to achieve an area-weighted average U-factor not exceeding 0.054 or shall be insulated between wood-framing members with insulation resulting in an installed thermal resistance of R-19 or greater.
When loose-fill insulation is installed, the minimum installed weight per square foot shall conform with the insulation manufacturer's installed design weight per square foot at the manufacturer's labeled R-value.
Opaque portions of above grade walls separating conditioned spaces from unconditioned spaces or ambient air shall meet the following requirements:
EXCEPTION to Section 150.0(c)1: Existing walls already insulated to a U-factor not exceeding U-0.110 or already insulated between framing members with insulation having an installed thermal resistance of R-11 or greater.
EXCEPTION to Section 150.0(d): A building with a controlled ventilation or unvented crawl space may omit raised floor insulation if all of the following are met:
If a masonry or factory-built fireplace is installed, it shall comply with Section 110.5, Section 4.503 of Part 11, and shall have the following:EXCEPTION to Section 150.0(e)2: An outside combustion-air intake is not required if the fireplace will be installed over concrete slab flooring and the fireplace will not be located on an exterior wall.
EXCEPTION to Section 150.0(e)3: When a gas log, log lighter, or decorative gas appliance is installed in a fireplace, the flue damper shall be blocked open if required by the CMC or the manufacturer's installation instructions.
Material used for slab edge insulation shall meet the following minimum specifications:
The cooling and heating loads are two of the criteria that shall be used for equipment sizing and selection.
NOTE: Heating systems are required to have a minimum heating capacity adequate to meet the minimum requirements of the CBC. The furnace output capacity and other specifications are published in the Commission's directory of certified equipment or other directories approved by the Commission.
All heating or cooling systems, including heat pumps, not controlled by a central energy management control system (EMCS) shall have a setback thermostat, as specified in Section 110.2(c).
EXCEPTION 1 to Section 150.0(j)1: Factory-installed piping within space-conditioning equipment certified under Section 110.1 or 110.2.
EXCEPTION 2 to Section 150.0(j)1: Piping that penetrates framing members shall not be required to have pipe insulation for the distance of the framing penetration. Piping that penetrates metal framing shall use grommets, plugs, wrapping or other insulating material to assure that no contact is made with the metal framing. Insulation shall butt securely against all framing members.
EXCEPTION 3 to Section 150.0(j)1: Piping installed in interior or exterior walls shall not be required to have pipe insulation if all of the requirements are met for compliance with (QII) as specified in the Reference Residential Appendix RA3.5.
EXCEPTION 4 to Section 150.0(j)1: Piping surrounded with a minimum of 1 inch of wall insulation, 2 inches of crawlspace insulation, or 4 inches of attic insulation, shall not be required to have pipe insulation.
EXCEPTION 1 to Section 150.0(k)1A: Integrated device lighting. Lighting integral to exhaust fans, kitchen range hoods, bath vanity mirrors, and garage door openers.
EXCEPTION 2 to Section 150.0(k)1A: Navigation lighting such as night lights, step lights, and path lights less than 5 watts.
EXCEPTION 3 to Section 150.0(k)1A: Cabinet Lighting. Lighting internal to drawers, cabinetry, and linen closets with an efficacy of 45 lumens per watt or greater.
EXCEPTION to Section 150.0(k)1Cii and iii: Recessed luminaires marked for use in fire-rated installations extruded into ceiling space and recessed luminaires installed in noninsulated ceilings.
A. Lighting shall have readily accessible wall-mounted controls that allow the lighting to be manually turned ON and OFF.
EXCEPTION to Section 150.0(k)2A: Ceiling fans may provide control of integrated lighting via a remote control.
EXCEPTION 1 to Section 150.0(k)2F: Ceiling fans may provide control of integrated lighting via a remote control.
EXCEPTION 2 to Section 150.0(k)2F: Luminaires connected to a circuit with controlled lighting power less than 20 watts or controlled by an occupancy or vacancy sensor providing automatic-off functionality.
EXCEPTION 3 to Section 150.0(k)2F: Navigation lighting such as night lights, step lights, and path lights less than 5 watts, and lighting internal to drawers and cabinetry with opaque fronts or doors or with automatic-off controls.
In addition to meeting the requirements of Section 150.0(k)1A, luminaires providing residential outdoor lighting shall meet the following requirements, as applicable:
Controls that override to ON shall not be allowed unless the override automatically returns the automatic control to its normal operation within 6 hours. An energy management control system that provides the specified lighting control functionality and complies with all requirements applicable to the specified controls may be used to meet these requirements.
Internally illuminated address signs shall either:
Lighting for residential parking garages for eight or more vehicles shall comply with the applicable requirements for nonresidential garages in Sections 110.9, 130.0, 130.1, 130.4, 140.6, and 141.0.
EXCEPTION to Section 150.0(m)1Bi: Portions of the duct system located in conditioned space below the ceiling separating the occupiable space from the attic are not required to be insulated if all of the following conditions are met:
- The noninsulated portion of the duct system is located entirely inside the building’s thermal envelope as confirmed by visual inspection.
- At all locations where noninsulated portions of the duct system penetrate into unconditioned space, the penetration shall be draft stopped compliant with CFC sections 703.1 and 704.1 and air-sealed to the construction materials that are penetrated, using materials compliant with CMC section E502.4.2 to prevent air infiltration into the cavity. All connections in unconditioned space are insulated to a minimum of R-6.0 as confirmed by visual inspection.
EXCEPTION to Section 150.0(m)1: Ducts and fans integral to a wood heater or fireplace.
EXCEPTION 1 to Section 150.0(m)12A: Evaporative coolers are exempt from the air filtration requirements in Section 150.0(m)12.
EXCEPTION 1 to Section 150.0(m)12Bi: For heat recovery ventilators and energy recovery ventilators the location of the filters required by Section 150.0(m)12 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 150.0(m)12Ai 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 × nominal width, ft2
Qfilter = design airflow rate for the air filter, ft3/min
Vface = air filter face velocity £150, ft/min
EXCEPTION to 150.0(m)13A: Systems that cannot conform to the specifications for hole location in Reference Residential Appendix Figure RA3.3-1 shall not be required to provide holes as described in Figure RA3.3-1.
EXCEPTION 1 to Section 150.0(m)13B and D: Standard ducted systems without zoning dampers may comply by meeting the applicable requirements in TABLE 150.0-B or 150.0-C as confirmed by field verification and diagnostic testing in accordance with the procedures in Reference Residential Appendix Sections RA3.1.4.4 and RA3.1.4.5. The design clean-filter pressure drop requirements specified by Section 150.0(m)12Div for the system air filter(s) shall conform to the requirements given in TABLES 150.0-B and 150.0-C.
EXCEPTION 2 to Section 150.0(m)13B and D: Multispeed compressor systems or variable speed compressor systems shall verify airflow (cfm/ton) and fan efficacy (Watt/cfm) for system operation at the maximum compressor speed and the maximum air handler fan speed.
EXCEPTION 3 to Section 150.0(m)13B: Gas furnace air-handling units manufactured prior to July 3, 2019 shall comply with a fan efficacy value less than or equal to 0.58 w/cfm as confirmed by field verification and diagnostic testing in accordance with the procedures given in Reference Residential Appendix RA3.3.
EXCEPTION 1 to Section 150.0(m)13C: Multispeed or variable speed compressor systems, or single speed compressor systems that utilize the performance compliance approach, shall demonstrate compliance with the airflow (cfm/ton) and fan efficacy (Watt/cfm) requirements of Section 150.0(m)13C by operating the system at maximum compressor capacity and system fan speed with all zones calling for conditioning, rather than in every zonal control mode.
EXCEPTION 2 to Section 150.0(m)13C: Gas furnace air-handling units manufactured prior to July 3, 2019 shall comply with a fan efficacy value less than or equal to 0.58 w/cfm as confirmed by field verification and diagnostic testing in accordance with the procedures given in Reference Residential Appendix RA3.3.
All dwelling units shall meet the requirements of ASHRAE Standard 62.2, Ventilation and Acceptable Indoor Air Quality in Residential Buildings subject to the amendments specified in Section 150.0(o)1 below. All dwelling units shall comply with Section 150.0(o)2 below.
EXCEPTION to Section 150.0(o): 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.
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)
Q50 = Vdu × 2 ACH50 / 60 min
where
Q50 = leakage rate at 50 Pa
Vdu = dwelling unit conditioned volume, ft3
ACH50 = air changes per hour at 50 Pa (0.2 inch water)
Q50 = Vdu × Verified ACH50 / 60 min
where
Q50 = leakage rate at 50 Pa
Vdu = dwelling unit conditioned volume, ft3
ACH50 = air changes per hour at 50 Pa (0.2 inch water)
Qinf = 0.052 × Q50 × wsf × [H/Hr]z
where
Qinf = effective annual infiltration rate, cfm (L/s)
Q50 = leakage rate at 50 Pa from equation 150.0-C, or equation 150.0-D
wsf = weather and shielding factor from Table 150.0-D
H = vertical distance between the lowest and highest above-grade points within the pressure boundary, ft (m)
Hr = reference height, 8.2 ft (2.5 m)
z = 0.4 for the purpose of calculating the Effective Annual Average Infiltration Rate
The Required Mechanical Ventilation Rate (Qfan) shall be calculated using Equation 150.0-F
Qfan = Qtot – F (Qinf × Aext)
where
Qfan = required mechanical ventilation rate, cfm (L/s)
Qtot = total required ventilation rate, cfm (L/s) from Equation 150.0-B
Qinf = effective annual average infiltration rate, cfm (L/s) from Equation 150.0-E
Aext = 1 for single-family detached homes, or the ratio of exterior envelope surface area that is not attached to garages or other dwelling units to total envelope surface area for attached dwelling units not sharing ceilings or floors with other dwelling units, occupiable spaces, public garages, or commercial spaces.
F = 1 for balanced ventilation systems and Qinf/Qtot otherwise
- A readily accessible occupant-controlled ON-OFF control.
- An automatic control that does not impede occupant ON control.
When using Table 150.0-H for demonstrating compliance, the airflow rating shall be greater than or equal to the value required by Section 150.0(o)1G 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 150.0(o)1Giiib, 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 150.0-H for determining compliance.
Use of Table 150.0-H is limited to ventilation systems that conform to all of the following three specifications:
- Total duct length is less than or equal to 25 ft (8 m),
- Duct system has no more than three (3) elbows, and
- Duct system has exterior termination fitting with a hydraulic diameter greater than or equal to the minimum duct diameter and not less than the hydraulic diameter of the fan outlet.
EXCEPTION to Section 150.0(o)1Gvi: Kitchen range hoods may be rated for sound at no less than 100 cfm at a static pressure determined at working speed as specified in HVI 916 section 7.2.
Any residential pool system or equipment installed shall comply with the applicable requirements of Section 110.4, as well as the requirements listed in this section.
H = C × F2
where:
H is the total system head in feet of water.
F is the flow rate in gallons per minute (gpm).
C is a coefficient based on the volume of the pool:
0.0167 for pools less than or equal to 17,000 gallons.
0.0082 for pools greater than 17,000 gallons.
EXCEPTION to Section 150.0(p)1E: Pumps less than 1 hp may be single speed.
Fenestration separating conditioned space from unconditioned space or outdoors shall meet the requirements of either Item 1 or 2 below:EXCEPTION 1 to Section 150.0(q)1: Up to 10 square feet of fenestration area or 0.5 percent of the conditioned floor area, whichever is greater, is exempt from the maximum U-factor requirement.
EXCEPTION 2 to Section 150.0(q)1: For dual-glazed greenhouse or garden windows, up to 30 square feet of fenestration area is exempt from the maximum U-factor requirement.
Shall meet the requirements of Section 110.10 applicable to the building project.
All single-family residences, that include one or two dwelling units shall meet the following. All electrical components shall be installed in accordance with the California Electrical Code:
Light sources in this column other that those installed in ceiling recessed downlight luminaires are classified as high luminous efficacy and are not required to comply with Reference Joint Appendix JA8. |
Light sources in this column are required to comply with Reference Joint Appendix JA8 and shall be certified and marked as required by JA8. |
1. LED light sources installed outdoors. 2. Inseparable Solid State Lighting (SSL) luminaires containing colored light sources that are installed to provide decorative lighting. 3. Pin-based linear fluorescent or compact fluorescent light sources using electronic ballasts. 4. High intensity discharge (HID) light sources including pulse start metal halide and high pressure sodium light sources. 5. Luminaires with hardwired high frequency generator and induction lamp. 6. Ceiling Fan Light Kits subject to federal appliance regulations. |
7. All light sources installed in ceiling recessed downlight luminaires. Note that ceiling recessed downlight luminaires shall not have screw base sockets regardless of lamp type as specified in Section 150.0(k)1C. 8 . Any light source not otherwise listed in this table. |
Return duct length shall not exceed 30 feet and shall contain no more than 180° of bend. If the total bending exceeds 90°, one bend shall be a metal elbow. Return grille devices shall be labeled in accordance with the requirements in Section 150.0(m)12Biv to disclose the grille's design airflow rate and a maximum allowable clean-filter pressure drop of 25 Pa (0.1 inches water) for the air filter when tested using ASHRAE Standard 52.2, or as rated in accordance with AHRI Standard 680 for the design airflow rate for the return grille. | ||
System Nominal Cooling Capacity (Ton)* | Return Duct Minimum Nominal Diameter (inch) | Minimum Total Return Filter Grille Nominal Area (inch2) |
1.5 | 16 | 500 |
2.0 | 18 | 600 |
2.5 | 20 | 800 |
* Not applicable to systems with nominal cooling capacity greater than 2.5 tons or less than 1.5 ton |
Each return duct length shall not exceed 30 feet and shall contain no more than 180° of bend. If the total bending exceeds 90°, one bend shall be a metal elbow. Return grille devices shall be labeled in accordance with the requirements in Section 150.0(m)12Biv to disclose the grille's design airflow rate and a maximum allowable clean-filter pressure drop of 25 Pa (0.1 inches water) for the air filter when tested using ASHRAE Standard 52.2, or as rated in accordance with AHRI Standard 680 for the design airflow rate for the return grille. | |||
System Nominal Cooling Capacity (Ton)* | Return Duct 1 Minimum Nominal Diameter (inch) | Return Duct 2 Minimum Nominal Diameter (inch) | Minimum Total Return Filter Grille Nominal Area (inch2) |
1.5 | 12 | 10 | 500 |
2.0 | 14 | 12 | 600 |
2.5 | 14 | 14 | 800 |
3.0 | 16 | 14 | 900 |
3.5 | 16 | 16 | 1000 |
4.0 | 18 | 18 | 1200 |
5.0 | 20 | 20 | 1500 |
* Not applicable to systems with nominal cooling capacity greater than 5.0 tons or less than 1.5 tons. |
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
|
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 150.0-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) |
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 pressure f 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 | 4e (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 150.0-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 150.0(o)1Giiib, 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 150.0-H for determining compliance. |
NOTE: Authority: Sections 25213, 25218, 25218.5, 25402 and 25402.1, Public Resources Code. Reference: Sections 25007,