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.

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.'

Where projects are restricted from implementing a demand-controlled ventilation system or are unable to retrofit the existing ventilation system to be demand-controlled, the requirements of Feature 03 Part 2 may be met through the following conditions for outdoor air supply rate, whichever is more stringent:
1. Exceed the ventilation rates set in ASHRAE 62.1-2013 (Ventilation Rate Procedure or IAQ Procedure) by 40%. Note that if this feature part applies to more than 50% of the total floor area at the project site, projects are not eligible to receive points for Feature 15 Part 1a.
2. Provide a ventilation supply rate of 12 L/s (25 CFM) per person or higher.

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.

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.

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."

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"

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) Adhesives, Fillers and Sealants (AFSv4.0i-2014) standard has been accepted as an alternative for the requirements of Feature 04 Part 2a.

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.

GreenGuard Gold has been accepted as an equivalent for California Department of Public Health (CDPH) Standard Method v1.1-2010 of Feature 04 Part 3.

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.

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.

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.

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

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

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

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.

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 for VOC emissions.

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

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.

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 4a of this feature. The thresholds are as follows:
Formaldehyde limit of 9 µg/m³
TVOC limits of ≤ 0.3 mg/m³
The insulation materials may be tested using one of the following methodologies:
ISO 16000-9
CEN/TS 16516
CDPH Standard Method v1.1

BREEAM-NL New Construction 2014, Hea 09 - Volatile Organic Compounds, is an approved alternative to BREEAM UK New Construction 2014 Hea 02 - Indoor Air Quality to meet WELL Feature 04 Parts 1-3.

GUT has been accepted for Feature 04 Part 3.

The GUT standard was created by the European carpet industry, and aims ""to improve continuously all environmental and consumer protection aspects throughout the life cycle of a textile floor covering (from production to installation, to use phase and recycling"".

This standard is only applicable to Part 3, and thresholds are as follows:

Termination criteria 3 days after loading:
TVOC: 250 µg/m³
Formaldehyde: 9 µg/m³

Desired values 28 days after loading:
TVOC: 100 µg/m³
Formaldehyde: 4 µg/m³

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."

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.

AFRDI Green Tick Furniture is compliant with Feature 4, Part 5.
It should be noted that GECA's allowable emission levels exceed those required in the ANSI/BIFMA e3-2011 Furniture Sustainability Standard, and GECA does not address the VOC emission concentration thresholds required by the ANSI/BIFMA e3-2011 Furniture Sustainability Standard. However, GECA is currently deemed a best in class within its market at this time.

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.'

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 Owner Letter of Assurance as required documentation.

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

Projects registered as New and Existing Interiors that can demonstrate that aspects of the base building design is outside of their control are not required to achieve Feature 05, Part 1: Filter Accommodation.

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.