Projects located in areas where annual average ambient PM2.5 levels are 35 µg/m³ or higher may utilize one of the following alternative strategies to satisfy Part 2.- Replace the PM2.5 level in part 2b with 25 µg/m³. Projects using this option are limited in WELL Certification level to Gold, no matter how many optimizations are achieved.- Replace the PM2.5 level in part 2b and the PM10 level in part 2c with a level equal to 30% of the 24- or 48-hr average of ambient outdoor levels on the day(s) of Performance Verification. Projects using this option are limited in WELL Certification level to Silver, no matter how many optimizations are achieved.

In the Feature description, remove the second paragraph. Replace with the following text:
'Intent: To deter smoking, minimize occupant exposure to second hand smoke, and reduce smoke pollution.'

For Part 2b, add: "(measured at 1.2-1.8 m [4-6 ft] above the floor)" after "below 800 ppm" and add: "maximum" after "at"

EN 13779, section A. 15. 2, Table A.10 may be used to comply with Feature 03, Part 2. Note, projects must adhere to Indoor Air Category IDA 1 or 2.

In the Feature description, remove the second paragraph. Replace with the following text:
'Intent: To ensure adequate ventilation and high indoor air quality.'

Under Part 2, after “For all spaces” insert the following: “46.5 m² [500 ft²] or larger”

Exemplary level emission criteria for BREEAM International New Construction 2016 scheme has been accepted as an equivalent standard to the California Department of Public Health (CDPH) Standard method v1.1-2010 as specified in Part 4 of this feature. The thresholds are as follows:- Formaldehyde limit of 10µg/m3- TVOC limits of ≤ 0.3 mg/m3The insulation materials may be tested using one of the following methodologies:- ISO 16000-9- CEN/TS 16516- CDPH Standard Method v1.1

MAS Certified Green has been accepted for Feature 4 Part 1, 2, 3, 4, 5.The MAS Certified Green® program integrates testing requirements of CDPH Standard Method V1.1, the BIFMAM7.1 Test Method and Formaldehyde emission testing requirements of the Cal EPA – ARB with chemical emission limits referenced by the USGBC LEED, CHPS and CARB organizations. The MAS Certified Green® program is ISO/TEC 17025 and 17065 compliant and recognized by LEED, CDPH, BIFMA and CHPS.MAS Certified Green is also accepted for LEED v4 EQ Credit Low-Emitting Materials Third Party Certifications and Labels. It meets CDPH for emissions, CARB or SCAQMD for VOC content (wet-applied), and ANSI/BIFMA for furniture.

VOC ETL class 2 and 3, VOC+ ETL Environmental and Formaldehyde-Free, has been accepted as equivalent for Feature 4 Part 5.2nd class: VOC+ certificate states conformance to ANSI/ BIFMA e3 standard credits 7.6.1, 7.6.2 and / or credit 7.6.3 which includes California Department of Public Health (CDPH) Standard Method v1.1 01350 (2010).3rd class: Formaldehyde-Free program includes compliance to the second class listed above, VOC+ ETL Environmental, and compliance to formaldehyde requirements for ultra-low-emitting formaldehyde (ULEF) and no added formaldehyde resins.

Remove: "July 1, 2005 for VOC content". Add: "Volatile organic compound (VOC) limits correspond to an effective date of July 1, 2005 and rule amendment date of January 7, 2005."

Previously published as an AAP:
The following referenced standards may be used in lieu of ANSI/BIFMA e3-2011 Furniture Sustainability Standard Section 7.6.1 and 7.6.2, testing in accordance with ANSI/BIFMA Standard Method M7.1-2011:
- the Finnish M1 label for non-upholstered furniture
- the Blue Angel label for upholstered furniture
If these standards are used, the furniture must also be separately tested for 4-phenylcyclohexane and total aldehydes and held to the same limits specified in ANSI/BIFMA e3-2011 section 7.6.1 and 7.6.2

Previously published as an AAP:
Products and materials that have an A or A+ class rating under the French legislation on VOC emissions meet the requirements of Parts 1, 2, 3, and 4.

Updated:LEED v4 EQc Low-emitting materials credit is deemed equivalent for Part 1. Please note that the project must adhere to the ""Additional VOC content requirements for wet-applied products"" section (found in LEED v4). Additionally, all newly applied paints and coatings must be in compliance.BREEAM UK NC/RFO 2014, INC. 2016 and IRFO 2015 Hea 02: Indoor air quality - Volatile organic compound (VOC) emission levels (products) credit is deemed equivalent for Part 1. Please note the project must adhere to the Volatile organic compound (VOC) emission levels for products (found in Table 18 in the BREEAM UK New Construction 2014, Table 20 in the UK RFO 2014, Table 17 and 18 in the INC 2016). Additionally, all newly applied paints and coatings must be in compliance.LEED v4 EQc Low-emitting materials credit is deemed equivalent for Part 2. Please note that the project must adhere to the ""Additional VOC content requirements for wet-applied products"" section (found in LEED v4). Additionally, all newly applied adhesives and sealants must be in compliance.BREEAM UK NC/RFO 2014, INC 2016 and IRFO 2015 Hea 02: Indoor air quality - Volatile organic compound (VOC) emission levels (products)credit is deemed equivalent for Part 2. Please note the project must adhere to the Volatile organic compound (VOC) emission levels for products (found in Table 18 in the BREEAM UK New Construction 2014, Table 20 in the UK RFO 2014, Table 17 and 18 in the INC 2016). Additionally, all newly applied adhesives and sealants must be in compliance.LEED v4 EQc Low-emitting materials credit is deemed equivalent for Part 3. Please note that the project must adhere to the ""General emissions evaluation"" section (found in LEED v4). Additionally, all newly installed flooring must be in compliance.BREEAM UK NC/RFO 2014, INC 2016 and IRFO 2015 Hea 02: Indoor air quality - Volatile organic compound (VOC) emission levels (products) credit is deemed equivalent for Part 3. Please note the project must adhere to the Volatile organic compound (VOC) emission levels for products (found in Table 18 in the BREEAM UK New Construction 2014, Table 20 in the UK RFO 2014, Table 17 and 18 in the INC 2016). Additionally, all newly installed flooring must be in compliance.LEED v4 EQc Low-emitting materials credit is deemed equivalent for Part 4. Please note that the project must adhere to the ""General emissions evaluation"" section (found in LEED v4). Additionally, all newly installed insulation must be in compliance.LEED v4 EQc Low-emitting material credit is deemed equivalent for Part 5. Please note that the project must adhere to the ""Furniture evaluation"" section (found in LEED v4). Additionally, 95% (by cost) of all newly purchased furniture and furnishing must be in compliance.Note BREEAM equivalency is only applicable for Feature 4 Parts 1-3.

Indoor Advantage Gold has been approved as an acceptable alternative for F04, Parts 1, 2, 4, and 5.

CalGreen 2013 Title 24, Part 11, California Green Building code has been approved as an equivalent for F04, Parts 1 and 2. For Part 3, projects are required to meet 100% of the resilient flooring requirements according to CalGreen 2013 Title 24 in order to fully comply with WELL requirements.

Green Star Credit 13: Indoor Pollutants is considered partially equivalent to WELL Feature 04: VOC reduction.Compliance with the Green Star credit is sufficient to comply with Parts 1 and 2, as well as to a portion of Part 3 (only flooring that is classified as carpeting) of the WELL feature.Projects will still need to comply with Part 3 (all non-carpet flooring), as well as with Parts 4 and 5 in order to fully comply with the Feature.

Indoor Advantage Gold is accepted as an equivalent for F04, Parts 1, 2, 4, and 5.

Change “The VOC content of all newly installed thermal and acoustic insulation in ceilings and walls…” to “The VOC content of all newly installed thermal and acoustic insulation inside the waterproofing membrane…”

The following referenced standards may be used in lieu of ANSI/BIFMA e3-2011 Furniture Sustainability Standard Section 7.6.1 and 7.6.2, testing in accordance with ANSI/BIFMA Standard Method M7.1-2011:- the Finnish M1 label for non-upholstered furniture- the Blue Angel label for upholstered furnitureIf these standards are used, the furniture must also be separately tested for 4-phenylcyclohexane and total aldehydes and held to the same limits specified in ANSI/BIFMA e3-2011 section 7.6.1 and 7.6.2

Under Part 2c, delete "VOC control" and replace with "VOC content".

Add Contractor Letters of Assurance as required documentation.

Remove: "Rack space and fan capacity is in place for future carbon filters or combination particle/carbon filters." Add: "Rack space is available and rack location identified for future implementation of carbon filters or combination particle/carbon filters."

Add "or combination particle/carbon filters." to the end of Part 1a. Part 1a now reads "Rack space and fan capacity is in place for future carbon filters or combination particle/carbon filters."

Class F 7 (or higher) media filters are an acceptable equivalent to MERV 13 (or higher) media filters.

In a project with a split-system air conditioning unit that does not allow for accommodating MERV 13 filters, the following measures may be implemented as an alternative. For Parts 1 and 2a of this feature, a standalone air purifier with carbon filter and HEPA filter performing equivalent to MERV 17-20 may be used in accordance with manufacturer’s guidelines. Installation of the HEPA filters may not be conditional based on the criteria in Part 2b. A sufficient quantity of stand-alone air purifiers and carbon filters and HEPA filters must be provided in accordance with the manufacturers recommended area coverage. Provide a policy document to confirm Part 3 of this Feature, and a policy document that confirms that the project owner will maintain and replace the filters and filter units located within the project as per manufacturer specifications.

In lieu of installing rack space for future carbon filters, an execution plan for future modifications to the HVAC system to create rack space for carbon filters may be provided in the event that the installation of carbon filters is a requirement of the WELL Building Standard in the future. To follow this approach, it must be confirmed that the system would be able to physically accept carbon filters should the necessary rack space be created, the plan must identify the cost estimates of renovating the HVAC system to include the necessary rack space to confirm that it is considered a capital improvement item, and the owner must commit to making the upgrades should the WELL Building Standard require carbon filters in a future recertification of the project.

As an alternative to the quarterly inspection of cooling coils required in Feature 6, Part 1b, projects may sample 25% of the project’s cooling coils per quarter (representative of all building orientations and equal to 100% of cooling coils per year) through either visual inspection or performance inspection tests. Policy documentation must be provided that includes a detailed description of the inspection protocols for cooling coils and drain pans, and confirming that cleaning will be provided if mold is found before the annual inspection. The inspection and analyses must be performed in accordance with ISO 16000-18 and ISO 16000-17.Note that dated photos must still be provided to IWBI on a yearly basis.

Add annotated operations schedule OR MEP drawing as required documentation, remove MEP Letter of Assurance, remove on-site spot checks.

Add: "occurring within one year prior to Performance Verification" after "building construction"

Add: "occurring within one year prior to Performance Verification" after "building construction"

Green Star Credit 7: Construction Environmental Management, and Credit 9: Indoor Air Quality are considered partially equivalent to WELL Feature 07: Construction Pollution Management. Compliance with the Green Star credit is sufficient to comply with Parts 1 and 2 of the WELL Feature. Note that projects will still need to comply with Parts 3 and 4 of Feature 7 in order to fully comply with the Feature.

In Part 3, change "To prevent building materials from absorbing and later releasing VOCs emitted by other (source) materials during construction, the following requirements are met: to "To prevent building materials from absorbing water or moisture during construction, the following requirements are met:"

Remove Parts 3b and 3c.

For Part 1a, add: "(sum of indoor and outdoor length)" after "primary direction of travel"

For Part 1c, add: "(sum of indoor and outdoor length)" after "primary direction of travel"

For projects that have an entryway walk off system that is less than 10 feet in length, but no smaller than 9’6’’, temporary rollout mats may be used during potential inclement weather (i.e. a 30% chance or higher) to bring the walk-off system up to 10 feet in length. In addition, projects must commit to cleaning the entrance/lobby multiple times daily, and demonstrate this through a cleaning plan. Provide the cleaning plan as well as a narrative detailing the project policy regarding rollout mats and inclement weather.

Where the options of an entry vestibule or revolving door are not possible for projects with regularly occupied lobbies, projects may create a healthy space by installing stand-alone air filters in the breathing zone near the primary seating of occupants, and near the entrance. A narrative must be included with documentation to describe the contaminants that will be filtered out along with an operations schedule for the maintenance of the air filters.

In areas where building vestibules and revolving entrance doors are not common architectural elements, the requirements of Part 2 (Entryway Seal) may be met by controlling building pressure according to the following requirements:

- An indoor pressure sensor must be installed in the building lobby and near any other entrance to the building from the outside. The pressure sensor must be capable of providing automatic readings on a frequency of at least one per hour.
- The project team must specify the targeted building pressurization levels for these locations for when the building is in both cooling mode and heating mode. The pressure levels must keep outside air from entering the building (more than standard practice), allow occupants to open and close doors easily, and must not cause undue condensation or other moisture problems due to exfiltration through the building envelope.

To document this alternative path, the project team must provide the following in the documentation application submission:
- A narrative describing the targeted building pressurization levels for both cooling mode and heating mode.
- A narrative (and other supporting documentation as necessary) demonstrating that the pressure levels keep outside air from entering the building (more than standard practice), allow occupants to open and close doors easily, and do not cause undue condensation or other moisture problems due to exfiltration through the building envelope.
- Indoor pressure readings demonstrating one day of pressure sensor readings from a cooling period, and one day of pressure sensor readings from a heating period. The exhaust and supply sequences must be provided to demonstrate that the desired pressure readings will be achieved.

Remove: "d. A cleaning schedule that specifies the extent and frequency that a surface is cleaned, sanitized, or disinfected in accordance with the Disinfection and Sanitization and Entryway Maintenance sections of Table A4 in Appendix C". Add: "d. A cleaning schedule that specifies the extent and frequency of cleaning, including the Entryway Maintenance section of Table A4 in Appendix C"

Projects registered as New and Existing Interiors that can demonstrate that aspects of the base building operation is outside of their control are not required to achieve Feature 09, Part 1: Cleaning Plan for Occupied Spaces.

Remove: "a. A list of high-touch and low-touch surfaces in the space (See Table A1 in Appendix C)". Add: "a. The Cleaning Equipment and Training section of Table A4 in Appendix C"

Remove: "c. A cleaning protocol and dated cleaning logs that are maintained and available to all occupants". Add: "c. A list of high-touch surfaces and schedule of sanitization or disinfection as specified in the Disinfection and Sanitization section in Table A4 in Appendix C"

Add Part 1e with the following text: 'The Cleaning Equipment and Program Protocol section of Table A4 in Appendix C.'

GECA and SCS have been approved as acceptable alternatives for F09, Part 1, Requirement d.

In the Feature description, remove the second paragraph. Replace with the following text:
'Intent: To reduce occupant exposure to pathogens, allergens, and harmful cleaning chemicals.'

For Part 1b, add “and entryway walk off mats (if applicable)” after “each high-touch and low-touch surface” in the first sentence.

Remove: "The following conditions are met for all pesticides and herbicides used on outdoor plants". Add: "Pesticide and herbicide use on outdoor plants is eliminated, or hazards are minimized through one of the following:"

Remove: "Only pesticides with a hazard tier ranking of 3 (least hazardous) as per the City of San Francisco Department of the Environment's (SFE) Hazard Tier Review Process are used. Refer to Table A2 in Appendix C for more details". Add: "Use of hazard-ranked pesticides based on screening lists described in Table A2 in Appendix C."

Under Part 1b, remove "Reduced Risk Pesticide List" and replace with "Hazard Tier Review Process"