Remove: "4 pCi/L". Add: "0.148 Bq/L [4 pCi/L]"

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.

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

UK Building Regulations Part F has been accepted as an equivalent for ASHRAE 62.2-2013 of Feature 03, Part 4a for supply air ventilation requirements.
Note that the extraction rates for kitchen and toilet exhaust must still meet the ASHRAE 62.2-2013 requirements.
This equivalency may only be used for projects in the United Kingdom.

A thermal comfort survey has not been accepted as an equivalent for the requirements of Feature 03 Part 3. Note that the intent of Feature 03 is to ensure adequate ventilation and high indoor air quality. Additionally, the reference standard for this feature is ASHRAE 62.1-2013: Ventilation for Acceptable Indoor Air Quality, not ASHRAE 55-2013.

Singapore SS 553:2016 CP Standard has not been accepted as an equivalent for ASHRAE 62.1-2013 of Feature 03. SS 553 Table 1 does not address all applicable and expected space types within an office occupancy. Note also that all Equivalencies are precedent-setting meaning that review of potential equivalent standards or codes cannot be conducted on a project-specific basis. Equivalency proposals must address the variety of project and space types present in the original code or standard. Further, in some cases, the ventilation rates listed in SS 553 Table 1 appear to be less than the default ventilation rates listed in ASHRAE 62.1-2013 Table 6.2.2.1 for the same occupancy types.
Please note that it is acceptable for the project team to bring on another individual with experience using ASHRAE standards to verify design compliance and sign the LOA (e.g. as a peer review), if they wish and/or the engineer of record is unable to do so.

Under "Air Feature 3 Ventilation effectiveness, Part 3", remove: "Testing and Balancing Report". Add: "MEP or Contractor" under "Letters of Assurance"

For Part 2a, add: "(measured at 1.2-1.8 m [4-6 ft] above the floor)" after "800 ppm" at the end of the sentence

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. Note that this equivalency may only be used for projects in Australia.

At the end of Part 1b, add "Quality Standards feature in the WELL Building Standard for at least 95% of all hours in the previous year."

Singapore SS 553 (2016) CP Standard has not been accepted as an equivalent for ASHRAE 62.1-2013 of Feature 03. Note the building/occupancy types indicated in the Outdoor Air Supply Requirements (Table 1) is not sufficient to cover all buildings and space types for all projects in Singapore.

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."

STANDARD 100 by OEKO-TEX® has not been accepted as an alternative for the requirements of Feature 4 Part 5.

The "Desirable Requirements" denomination in the Recommended Green Specifications published by the Hong Kong Environmental Protection Department (HKEPD) has been accepted as an alternative for the requirements of Feature 04 Parts 3, 4 and 5.
Note that the HKEPD thresholds for Formaldehyde and VOC are higher than WELL thresholds.
This Equivalency may only be used for projects in Hong Kong.

For Part 5a, remove: "and". Add: "or"

Headspace GC/MS has not been accepted as an equivalent for the requirements of Feature 04 Part 4. 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 VOCs but does not test for as many VOCs as required by CDPH v1.1 2010, including formaldehyde.

The level© certification has been accepted as an alternative to the ANSI/BIFMA e3-2011 Furniture Sustainability Standard sections 7.6.1 and 7.6.2, tested in accordance with ANSI/BIFMA Standard Method M7.1-2011, requirements of Feature 04. Note that section 7.6 Low Emitting Furniture credits (7.6.1 and 7.6.2) from level© certification must be achieved.

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.

The IS:13745-1993 testing method has not been accepted as an alternative for the requirements of CDPH Standard Method v1.1-2010 (or later) of Feature 04 Part 5 for projects in India. E1 class (EN 13986:2004) is an accepted alternative for the requirements of Feature 04 Part 5 for furniture substrates, although only for products aligned with protocols accepted under EN 13986:2004 for Europe.

Formaldehyde E1 class has been accepted as an alternative to the requirements of Feature 04, Part 5 for furniture substrates.
This Equivalency may only be used for projects in Europe.

CertiPUR has been accepted as an alternative for the requirements of Feature 04, Part 5. Note this only applies to polyurethane foam used in bedding and upholstered furniture. This Equivalency does not cover any other furniture or furnishing components except for the polyurethane foam.
This Equivalency may only be used for projects in Europe.

Blue Angel (Blauer Engel) is approved as an acceptable equivalent to the requirements of Feature 04, Part 5. However, please note that projects must still adhere to the formaldehyde requirements specified in ANSI/BIFMA e3-2011 Furniture Sustainability Standard.

European Union Paints Directive 2004/42/EC has been accepted as an alternative for the requirements of Feature 04, Part 1 for Europe. Please note that the European Union Paints Directive 2004/42/EC is the compliant performance standard for paints and varnishes listed within BREEAM UK New Construction: Hea 02 Indoor Air Quality.

EU Ecolabel for wooden floor coverings (2010 version) has been accepted as an alternative for the requirements of CDPH Standard Method v1.1-2010 (or later) of Feature 04 Part 3 for Europe.

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

In part description, remove: "inside the waterproofing membrane". Add: "interior" after "newly installed"

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

US EPA Method 24 has been accepted as an alternative to the requirements of Feature 04 VOC Reduction, Part 2. Please note that the products must have VOC content below the allowable limits established in SCAQMD as outlined in Part 2a. This equivalency may be used only in India.

M1 (ISO 16000) is approved as an acceptable equivalent to the requirements of Feature 4 VOC Reduction Part 1, 2, 3, 4 and 5.

CRI Green Label Plus is approved as an acceptable equivalent to the requirements specified in the CDPH Standard Method v1.1-2010 (or later) 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 (or later) for VOC emissions.

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

Conformance to the ANSI/BIFMA e3 standard by an accredited third-party product certification body is an acceptable alternative for the requirements for Feature 4, Part 5.

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

Indoor Air Comfort has not been accepted as an alternative for meeting the requirements of Feature 04 Parts 1, 2, 3, and 4.

The GUT carpet standard has been accepted for Feature 04 Part 3.

Note that products are subject to these thresholds:
Termination criteria 3 days after loading: 250 µg/m³ TVOC, 10 µg/m³ Formaldehyde.
Desired values 28 days after loading: 100 µg/m³ TVOC, 4 µg/m³ Formaldehyde.
This equivalency may only be used for projects in Europe.

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

Indoor Air Comfort Gold has been accepted as an alternative for the requirements of Feature 04 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.

Add: "b. For furnishings, California Department of Public Health (CDPH) Standard Method v1.1-2010."

The Blue Angel Label for upholstered furniture has been accepted as an equivalent for the ANSI/BIFMA e3-2011 Standard and M7.1-2011 Method of Part 5.

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

Greenstuf has been accepted as an equivalent for CDPH Standard Method v1.1-2010 of Feature 4 Part 4.

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.

Floorscore has been approved as an equivalent standard F04, Parts 2 and 3.

In the Feature description, remove the second paragraph. Replace with the following text:
'Intent: To minimize the effect of VOCs in building materials on indoor air quality.'

AFRDI Green Tick Furniture has been accepted as an equivalent for the ANSI/BIFMA e3-2011 Standard and M7.1-2011 Method of Part 5.
Note that not all the VOCs required byANSI/BIFMA e3-2011 are incorportated in Green Tick and the allowable emission levels in AFRDI Green Tick exceed those required in the ANSI/BIFMA e3-2011 Furniture Sustainability Standard.
This equivalency may only be used for projects in Australia and New Zealand.

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…”