For Part 5b, remove: "Project develops a plan to upgrade current mercury-containing lamp". Add: _“Project does not install any lamps not compliant with the low-mercury limits specified in Appendix C, Table A5. Project develops a plan to upgrade any existing non-compliant lamps to low-mercury or mercury-free lamps.”

PCB directive NRW- RdErl. d. Ministry of construction and housing v. 3.7.1996 - II B 4 - 476.101 has been accepted as an alternative for the requirements of Feature 11 Part 4a.

Asbestos inspection every three years through an agency/lab accredited by the 'National Accreditation Board for Testing and Calibration Laboratories (NABL), India' has been accepted as an alternative to the requirements of Feature 11 Part 3a.
An on-site investigation of the commercial space conducted by an agency/lab accredited by the 'National Accreditation Board for Testing and Calibration Laboratories (NABL), India', has been accepted as an alternative to the requirements of Feature 11 Part 2a. Note that projects must maintain a copy of the records produced by the asbestos investigator/abatement contractor, which should be made available to the building occupants.

Add "c. Not more than 100 ppm (by weight) added lead in all other building materials."

In the Feature description, remove the second paragraph. Replace with the following text:
'Intent: To reduce or eliminate occupant exposure to lead, asbestos, and PCBs from building materials.'

In the Feature description, remove the second paragraph. Replace with the following text:
'Intent: To limit the potential for bacteria and mold growth within buildings from water infiltration and condensation.'

In system diagram, add: "Immune" to list under diagram of body system

In the Feature description, remove the second paragraph. Replace with the following text:
'Intent: To remediate construction-related indoor air contamination.'

NEN-EN 13829 has been accepted as an equivalent for ASHRAE Guideline 0-2005 and the NIBS Guideline 3-2012 of Feature 14 Part 1 and 2.

In 26 Jul, 2017 Equivalency, remove: "Thernal". Add: "Thermal"

Previously published as AAP:
The ISO 9972-2015 - Thermal performance of buildings - Determination of air permeability of buildings - Fan Pressurization method is an acceptable alternative to meet WELL Feature 14 Part 1a.

In the Feature description, remove the second paragraph. Replace with the following text:
'Intent: To minimize air quality and thermal comfort issues resulting from the infiltration of untreated air through the building envelope.'

CIBSE Guide A is not accepted as an alternative to the requirements of Feature 15 Part 1. Note that the ventilation rates specified are generally not 30% above those required in ASHRAE 62.1-2013.

Remove: "Exceed ASHRAE outdoor air supply rates met in the WELL Ventilation Effectiveness feature by 30%". Add: "Exceed outdoor air supply rates met in Feature 03, Part 1a by 30%".

CEN Standards EN 15251:2007 and EN 13779:2007 may be used in lieu of ASHRAE 62.1-2013 for Feature 15, Part 1. ​​​​

The project must meet Category I ​or II​ (described in Table 1)​ and must calculate the ventilation rate based on ​either of the below calculation methods​,​ referenced in EN 15251: 2007​, ​section B.1.3​ ""Method based on ventilation rate per person or per m² floor area​:"" ​
​1​) the addition of the ​occupant and building ​values ​(see section B.1.2)
2​) the highest value (maximum of the calculated value based on per person and the value based on per m² floor area from Table B.3)

​Additionally, the requirements of CEN Standard EN 15251-2007 must be met and the performance requirements of CEN Standard EN 13779:2007 related to ventilation and room conditioning systems must be met (excluding section 7.3, Thermal Environment; section 7.6, Acoustic Environment; section A.16; and section A.17).

In the Feature description, remove the second paragraph. Replace with the following text:
'Intent: To expel internally-generated pollutants through an increased supply of outdoor air.'

In Part 1, change "The following is required in terms of the rate of fresh air supply to all regularly occupied spaces:" to "The following is required in terms of the rate of outdoor air supply to all regularly occupied spaces:"

In part description, remove: "locker rooms". Add: "changing rooms"

Projects situated in countries where local or regional standards do not pose strict requirements for relative humidity control (e.g. EN-15251) cannot earn points by not complying with the requirements of Feature 16, Part 1. Projects without dehumidification or humidification systems may earn points through Part 1b.

Eco Mark No. 155 has been accepted as an equivalent to the low-emission criteria for printers and copiers for Feature 17, Part 1. Note that this equivalency may only be used for projects in Japan.

Low emission criteria of EPEAT has been accepted as an alternative to Ecologo CCD 035, Blue Angel RAL- UZ 171 or Green Star in Feature 17 Part 1.

In the Feature description, remove the second paragraph. Replace with the following text:
'Intent: To preserve air quality in occupied spaces through the isolation and proper ventilation of indoor pollution sources and chemical storage areas.'

For Part 2a, remove: "the Air Quality Standards feature". Add: "Part 1: Indoor Air Monitoring"

Add: "(measured at 1.2-1.8 m [4-6 ft] above the floor)" after "once an hour"

The requirements of Part 3 (Environmental Measures Display) may be met by hosting the required data on a website accessible to occupants and in locations where the physical display would be located, placing signage indicating the website where the data may be accessed.

Add on-site spot checks as required verification.

In 27 Apr, 2017 AAP, remove: "tenant space" after "a. Must be directly accessible from the". Add: "project"

For Feature 19, Part 1, a dedicated outdoor terrace can be provided. The terrace must satisfy the following requirements:
a. Must be directly accessible from the project
b. Must have seating for a minimum of 15% of the total regular project occupants
c. Must be adequately shaded to allow occupants to perform their work without significant glare
d. Feature 19, Part 2 and Part 3 must be addressed

In the Feature description, remove the second paragraph. Replace with the following text:
'Intent: To increase the supply of high quality outdoor air and promote a connection to the outdoor environment by encouraging occupants to open windows when outdoor air quality is acceptable.'

Add policy document as required documentation, remove Architect Letter of Assurance.

Add Architect Letter of Assurance as required documentation, remove annotated architectural drawing.

For Part 1, remove: "Dedicated outdoor air systems are used for heating and/or cooling systems". Add: "Dedicated outdoor air systems are used for ventilation"

In the Feature description, remove the second paragraph. Replace with the following text:
'Intent: To allow buildings to control the outdoor air supply independently from the heating/cooling needs of the building.'

REHVA Guidebook No. 1 (Displacement Ventilation in non-industrial premises) may be used in lieu of the System Performance Evaluation and ASHRAE Guidelines RP-949 for Feature 21, Part 1.

Replace “One of the following is met for projects implementing a displacement ventilation system for heading and/or cooling:” with “Projects implement a displacement ventilation system for heating and/or cooling in which one of the following is met:”

For Part 1c, add: "(except paper recycling bins)" after "cans"

Remove: "Inspections". Add: "Visual inspections during performance verification"

Inquiry: For Part 1b, our garbage cans are integrated into casework. The casework has a 6 inch opening at the top for users to insert waste. The garbage is collected from the garbage cans daily to minimize the time that waste remains in the garbage cans. Will this design meet the requirements of Part 1b?

Ruling: No, the design as described is not approved. The openings are large enough to allow pests to gain access to the garbage and allow for discarded trash to fall outside the garbage receptacle within the casework.

In introduction language, remove "and furniture be covered in washable covers" from the last sentence in the second paragraph. The last sentence becomes: "To minimize allergenic pests, this feature requires that pest inspections be conducted regularly and food be stored and sealed."

For Part 1a, add: "or combination particulate/carbon filters" after "Activated carbon filters"

In part description, remove: "(whether primary or back-up) must meet" after "...heating or power generation". Add: "(including back-up if used more than 200 hours per year) meets"

China's GB 6932-2015 Domestic gas instantaneous water heater, Class 5 has been approved for Feature 24 Part 2. It should be noted that the testing protocols in China GB 6932-2015 for humidity and oxygen percentage differ from the requirements in California's South Coast Air Quality Management District rule 1121. However, GB 6932-2015 Domestic gas instantaneous water heater, Class 5 is currently deemed best in class within China.

The following equivalencies have been approved for Feature 24 Part 4:
1. Non-road diesel engine vehicles - Euro Stage IIIA, US Tier 3 and 2, Japan MoE standards.
2. On road diesel engine vehicles - Euro V (2012) standard.
It should be noted that Euro Stage IIIA, US Tier 3 and 2, Japan MoE and Euro V (2012) standard's allowable emission levels exceed those required in US Tier 4 and US EPA 2007. However, Euro Stage IIIA, US Tier 3 and 2, Japan MoE and Euro V are currently deemed best in class within Hong Kong at this time.
It should be noted that Euro Stage IIIA, US Tier 3 and 2, Japan MoE and Euro V (2012) standard's allowable emission levels exceed those required in US Tier 4 and US EPA 2007. However, Euro Stage IIIA, US Tier 3 and 2, Japan MoE and Euro V are currently deemed best in class within Hong Kong at this time.

The following China local standards have been approved as an acceptable alternative for F24, Part 4:
1. China local standard GB20891-2014 for non-road diesel engine vehicles
2. China local standard GB17691-2005 for passenger vehicles and heavy duty trucks
Note that that NOx limits in the China standards are higher then US EPA limits.

In the Feature description, remove the second paragraph. Replace with the following text:
'Intent: To reduce occupant exposure to combustion-related air pollution from heating and transportation sources.'

Global GreenTag Standard v4.0 and PhD Methodology have been accepted as an alternative for the requirements of Feature 25 Part 1. However, Global GreenTag Standard v4.0 and PhD Methodology have not been accepted as an alternative for the requirements of Feature 25 Part 2, 3, 4 and 5.

Products certified under the Good Environmental Choice Australia (GECA) Furniture & Fittings (Level B) (FF v3.0-2017) standard are considered to meet the toxic material reduction restrictions of Feature 25 Part 1, 2 and 5. Note, however, that any products certified under Good Environmental Choice Australia (GECA) Furniture & Fittings (Level B) (FF v3.0-2017) standard have not been accepted as alternatives for the requirements of Feature 25 Part 3, Phthalate (Plasticizers) Limitation. Feature 25 Part 3 requires the limitation of DEHP, DBP, BBP, DINP, DIDP and DNOP phthalates, while GECA requires the ban of only DEHP, DBP, DAP and BBP phthalates. Since GECA does not account for the limitation of DINP, DIDP and DNOP, products certified under this GECA standard cannot be deemed as in compliance with Feature 25 Part 3.

Remove: "(Please refer to Table A3 for additional details.)"

In the Feature description, remove the second paragraph. Replace with the following text:
'Intent: To minimize the impact of hazardous building material chemicals on indoor air quality and protect the health of manufacturing and maintenance workers.'

Add Contractor Letters of Assurance as required documentation.

Projects may meet Feature 26 Part 1 through the application of REACH Optimization. Specifically, use of furnishings, built-in furniture, interior finishes and finish materials that document their material ingredient optimization for at least 25% (by cost) via the following paths:

• Projects meet REACH criteria for all Substances of Very High Concern (SVHC) as listed on the REACH Authorization or Candidate list.
• Projects have fully inventoried all Substances of Very High Concern (SVHC) as listed on the REACH Authorization or Candidate list to 100 ppm (0.01%).

The Good Environmental Choice Australia (GECA) Furniture & Fittings, Foam & Mattresses (Level B) (FFF&M v3.0-2017) standard has not been accepted as an alternative for the requirements of Feature 26 Part 1. Note that while most LBC Red List substances are prohibited in the GECA Furniture Level B standard, the GECA Furniture Level A standard allows products that contain formaldehyde-based additives subject to a certain air emissions limit, whereas the Red List prohibits the use of added formaldehyde (Section 4.1 Criterion 13).