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"

ASHRAE Standard 170-2008 has been accepted as an alternative to meet the requirements of Feature 3 - Ventilation Effectiveness, Part 1 - Ventilation Design for healthcare facilities.

Note that all spaces not covered in ASHRAE 170-2008 must follow ventilation rates described in ASHRAE 62.1-2010 or later.

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 4b, remove: "(Ventilation Rate Procedure or IAQ Procedure) for residential buildings of more than 3 floors above grade". Add: "for common areas and other spaces apart from dwelling units"

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"

Projects may use custom-made furniture that contain composite wood panels not tested using the CDPH v. 1.1-2010 or ANSI/BIFMA M7.1-2011 standard methods, as long as the composite wood manufacturer is listed in the 'List of TPC-Exempt NAF/ULEF Manufacturers approved by CARB' (https://www.arb.ca.gov/toxics/compwood/naf_ulef/listofnaf_ulef.htm).

The VOC emissions of all newly installed interior thermal (excluding duct) and acoustic insulation meet all limits set by the following, as applicable

Natureplus has been accepted as an alternative for the requirements of CDPH Standard Method v1.1-2010 (or later) Feature 04 Part 1, 2, 3 and 4. Note that projects must adhere to the minimum formaldehyde requirement specified in the CDPH Standard Method v1.1-2010 (or later) for VOC emissions.

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

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 Good Environmental Choice Australia (GECA) Floor Coverings issued July 2017 has been accepted as an alternative for the requirements of Feature 04, Part 3.

TÜV Rheinland LGA testing standard 2011 has been accepted as an alternative for the requirements of Feature 04, Part 5. Note that this equivalency may only be used for workstation cabinetry for projects in Europe and Asia.

RAL-GZ-430 has not been accepted as an equivalent for the ANSI/BIFMA e3-2011 Furniture Sustainability Standard sections 7.6.1 and 7.6.2, of Feature 04, Part 5.
Note that RAL-GZ-430 does not identify a comparable requirement for TVOC and 4-Phenylcyclohexene emissions for workstations and seating. Additionally, for cupboard furniture and upholstered furniture, the formaldehyde emissions threshold indicated in RAL-GZ-430 is significantly higher than that mandated by CDPH.

EU Ecolabel for Paints and Varnishes (2014) has been accepted as an alternative for the requirements of CDPH Standard Method v1.1-2010 (or later) of Feature 04 Part 1 for Europe.

Formaldehyde E1 class has been accepted as an alternative for the requirements of CDPH Standard Method v1.1-2010 (or later) Feature 04 Part 3 for Europe.

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.

REACH Standard No 1907/2006 has not been accepted as an equivalency to the requirements set in Feature 04 Part 4. Note that the Equivalency Proposal outlines a strategy for the elimination of hazardous substances through the use of REACH lists, but not an equivalency to requirements set in CDPH Standard Method v1.1-2010 (or later).

GEV-EMICODE EC1 and EC1Plus is approved as an acceptable equivalent to the requirements of Feature 4 VOC Reduction Part 1, 2, 3 and 4. Note, projects must adhere to the minimum formaldehyde requirement specified in the CDPH Standard Method v1.1-2010 (or later) for VOC emissions.

M1 (EN-717-1:2004) is approved as an acceptable equivalent to the requirements of Feature 4 VOC Reduction Part 5.

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

OEKO-TEX is approved as an acceptable equivalent to the requirements of Feature 4 Part 4.

SGS TVOC laboratory testing method has been accepted as an alternative equivalent to Feature 04 Part 4. Note, projects must adhere to the minimum VOC limit requirements of the CDPH Standard Method v1.1-2010 (or later) for VOC emissions. This equivalency may only be used for projects in India.

The Australian Carpet Classification Scheme (ACCS) has been accepted as an equivalent for CDPH Standard Method v1.1 of Feature 4 Part 1.

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 1113 for Part 1a.

MAS Certified Green® has been accepted for Feature 04 Parts 1, 2, 3, 4 and 5.

VOC ETL class 2 and 3, VOC+ ETL Environmental and Formaldehyde-Free, has been accepted for Feature 04 Part 5.

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.

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."

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

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

GreenGuard Gold is accepted as an equivalent for Feature 4, Part 5

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

For Feature 4, Part 5, as an alternative to the formaldehyde emissions thresholds cited in ANSI/BIFMA e3-2011 7.6.2, projects may use certain approved thresholds. For systems furniture laminates: CDPH Standard Method v1.1-2010 limits (9 ug/m3) may be used. For furniture substrates: CARB Phase II limits (50 ppb for hardwood plywood with veneer core, 50 ppb for hardwood plywood with composite core, 90 ppb for particleboard, 110 ppb for medium density fiberboard, and 113 ppb for thin medium density fiberboard) may be used. Additionally, note that the project will still be required to demonstrate Feature 01: Air Quality Standards.

GECA FFFv2.1i-2010 (Furniture, Fittings and Foam) 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 this standard and the allowable emission levels in GECA FFFv2.1i-2010 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.

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