Updated:
Projects may exceed 500 µg/m³ in total VOCs (part 1c), so long as the following individual component VOCs do not exceed the limits listed in CDPH/EHLB/Standard Method V1.1, Table 4.1 (one half the Chronic Reference Exposure Levels (CREL) issued by Office of Environmental Health Hazard Assessment):

For Part 1a, remove: "inside the building". Add: "inside the project"

CIBSE Guide A has been accepted as an alternative for the requirements in ASHRAE 62.1 2013 for Feature 3 Part 1

A thermal comfort survey has not been accepted as an equivalent means of achieving Feature 03 – Ventilation Effectiveness, Part 3 – System Balancing. Note that the intent of Feature 03 is to ensure adequate ventilation and high indoor air quality. While thermal comfort surveys are a commendable strategy to indicate thermal comfort, the most accurate method to ensure adequate ventilation is through testing and balancing. Additionally, the reference standard for this Feature is ASHRAE 62.1-2013: Ventilation for Acceptable Indoor Air Quality, not ASHRAE 55-2013, which was referenced in the EP submission and addresses Thermal Environmental Conditions for Human Occupancy. Therefore, methods suggested in ASHRAE 55-2013 are not applicable. Please note that although a project may comply with Part 1 – Ventilation Design using the IAQ Procedure, which requires subjective evaluation, Part 3 – System Balancing requires balancing.

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 Part 3a, change "After substantial completion and prior to occupancy, the HVAC system undergoes testing and balancing" to "After substantial completion and prior to occupancy, the HVAC system has (within the last 5 years), or is scheduled to, undergo testing and balancing."

AS 1668.2 may be used in lieu of ASHRAE 62.1 for Feature 3, Part 1: Ventilation Design. Note that all projects that wish to comply with AS 1668.2 must assume a minimum density of 16 m² per person.

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

For Part 4a, remove: "(Ventilation Rate Procedure or IAQ Procedure) for residential buildings of 3 or fewer floors". Add: "(or more recent version) for dwelling units"

Remove: "c. Projects comply with all requirements set in the Natural Ventilation Procedure…the previous year."

GreenGuard Gold has been accepted as an equivalent to California Department of Public Health (CDPH) Standard Method v1.1-2010 in Feature 04 – VOC Reduction, Part 3 - Flooring.

In part description, add: "interior" after "newly applied"

TÜV Rheinland Green Product Mark Furniture criteria, 2PfG E1992, has been accepted as an alternative for the requirements of Feature 4 Part 5.

The GB 18580-2001 Indoor Decorating and Refurbishing Materials - Limit of Formaldehyde Emission of Wood-based Panels and Finishing Products has not been accepted as an alternative for the requirements of Feature 4 Part 3, 4 and 5. Note the proposed testing method standard does not include methods for testing VOCs other than formaldehyde.

NEN-EN-ISO 17895 has been accepted as an alternative for the requirements of Feature 04, Parts 1 and 2. Note that while NEN-EN-ISO 17895 is acceptable for determining VOC content, the products must adhere to the VOC limits set forth in CARB 2007, Suggested Control Measures (SCM) for Architectural Coatings, or South Coast Air Quality Management District (SCAQMD) Rule 1113 and Rule 1168.

Headspace GC/MS has not been accepted as an equivalent for the requirements of Feature 04 – VOC Reduction, Part 4 - Insulation. The Headspace method does not test for all VOCs that are limited by CDPH v1.1 2010. Note that the Headspace GC/MS method does test for individual VOC’s, but does not test for as many VOC’s as required by CDPH v1.1 2010, including formaldehyde and mercury.

The Good Environmental Choice Australia (GECA) Paints and Coatings PCv2.2iii-2012 standard has been accepted as an alternative for the requirements of Feature 04, Part 1.

The Good Environmental Choice Australia (GECA) Building Insulation Materials (BIMv2.0-2017) standard has been accepted as an alternative for the requirements of Feature 04 Part 4.

M1 (ISO 16000) is approved as an acceptable equivalent to the requirements of Feature 4 VOC Reduction Part 1, 2, 3, 4 and 5. Note, projects must adhere to the minimum formaldehyde requirement specified in CDPH Standard Method v1.1-2010 for VOC emissions.

CRI Green Label Plus is approved as an acceptable equivalent to the requirements specified in the CDPH Standard Method v1.1-2010 for Feature 4 Part 2 and 3.

AgBB is approved as an acceptable equivalent to the requirements of Feature 4 VOC Reduction Part 1, 2, 3, 4 and 5. Note, projects must adhere to the minimum formaldehyde requirement specified in the CDPH Standard Method v1.1-2010 for VOC emissions.

The REACH standard has not been accepted as an equivalent to the CDPH Standard Method v1.1-2010 guidelines for Feature 04 Part 5. Note that the VOC limit thresholds specified in CDPH Standard Method v1.1-2010 guidelines must be met. The VOC limit thresholds for Substances of Very High Concern (SVHC) listed in REACH are not acceptable.

EN 13964:2014 emission testing method has been accepted as an alternative for the requirements of Feature 4, Part 4 for suspended ceilings. Ceilings with heating or cooling properties and walls must meet limits set by the California Department of Public Health Standard Method v1.1-2010. Formaldehyde emission should be measured in accordance with EN 717-1:2004.

Global GreenTag has been approved as an acceptable equivalent to the requirements for Feature 04 Part 1, 2, 3, 4 and 5.

IS 101.2.2.1986 and IS 101.2.1.1988 are acceptable equivalent testing method standards in order to measure in accordance with the VOC content threshold limits specified in SCAQMD Rule 1168 for Part 2a.

For Part 2a, add: "for VOC content", after "South Coast Air Quality Management District (SCAQMD) Rule 1168"

MAS Certified Green® has been accepted for Feature 04 Parts 1, 2, 3, 4, 5.
The MAS Certified Green® program integrates testing requirements of California Department of Public Health (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 for Feature 04 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.

eco-INSTITUT-Label (2015 version) has been deemed acceptable for Feature 04 Part 1 - 4 with the following requirement:
The formaldehyde limit of 9 µg/m³ at 28 days must be met for products using this label.

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.

Previously published as an AAP:
Field and Laboratory Emission Cell (FLEC) emissions testing is approved as an emissions testing methodology only for furniture and furnishings that are made up of a uniform material and have flat testing surfaces on which the FLEC emissions testing methodology may be applied. For example, flat surfaced cabinetry that is made up of a uniform material may be tested using this methodology. However, chairs that are made from a variety of materials that lack flat surfaces may not be tested using this methodology. The emissions test must be administered by a third party investigator with no affiliation with the project. The associated costs are the responsibility of the project team. Additional tests performed in accordance with ISO 16000 methodology must be performed for total aldehydes and 4-Phenylcyclohexane and must meet the thresholds specified in the WELL Building Standard.

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.

In Parts 3, 4 and 5 of this Feature, change 'VOC content' to 'VOC emissions'

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…”

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."

Projects unable to provide additional space for carbon filters may instead educate future tenants on their ability to buy and install stand-alone air purifiers with carbon filters. The project team must provide a letter signed by the project owner to confirm that if required for WELL certification in the future, the project owner will buy and install the air purifiers with filters on behalf of the tenant. It must be demonstrated that adequate wall space is accommodated to install wall-mounted air purifiers. The WELL Assessor will confirm the available wall space and examine a copy of all the information given to tenants during the project’s Performance Verification.

Change Part 1b from "The system is able to accommodate additional filters" to "The mechanical system is sized to accommodate the additional filters."

In the Feature description, remove the second paragraph. Replace with the following text:
'Intent: To remove indoor and outdoor airborne contaminants through air filtration.'

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: "newly installed" after "all"