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.

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

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.

Under Part 1c, delete "VOC control" and replace with "VOC content".

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

Filters tested under the standards ISO 16890:2016 or JIS B 9908:2018 are deemed acceptable for MERV 13 (or higher) filters of Part 2, if they meet or exceed the following efficiencies:
e(PM1): 47%
e(PM2.5): 58%
e(PM10): 78%

Multifamily residential projects may achieve Feature 5, Part 1 by providing subsidized rental of purification systems to tenants via a discounted rental rate of the dwelling unit. Project teams must demonstrate that the discounted rent is lower than the market value of the dwelling unit and that the difference will cover the rental of air purification devices. Tenants are required to sign an agreement for purchasing or leasing air purifier(s) in order to receive the discounted rate.

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 Performance Testing Agent 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.'

Multifamily Residential projects may use wall-mounted HEPA filters to meet the requirements of Feature 5 Parts 1 and 2, provided the project contains a sufficient quantity of wall mounted HEPA filters in accordance with the manufacturer’s recommended area coverage. In addition, a policy document must be provided confirming Part 3 of the Feature and that the Owner will maintain the filters for the units that are located in both common and private areas.

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"

Add: "occurring within one year prior to Performance Verification" after "during construction"

In the Feature description, remove the second paragraph. Replace with the following text:
'Intent: To minimize the introduction of construction-related pollutants into indoor air and protect building products from degradation.'

In Part 3, change "To prevent building materials from absorbing and later releasing VOCs emitted by other (source) materials during construction, the following requirements are met: to "To prevent building materials from absorbing water or moisture during construction, the following requirements are met:"

Remove Parts 3b and 3c.

Projects may achieve Feature 08, Part 1 by developing and using a comprehensive floor cleaning plan at entrances which details the cleaning products and equipment that will be used to clean various surfaces on a daily basis.

In lieu of the original feature verification method, project teams submit a professional narrative which specifies cleaning products and equipment, protocols for post-inclement weather situations and a checklist with daily tasks that are completed at least two times per day.

In 24 Oct, 2016 AAP, remove: "Where projects are restricted from using an entry vestibule or revolving door (for e.g. projects in the Philippines following the National Building Code, which prohibits revolving doors or vestibules for designated exits), they". Add: "Projects"

In part description, add: ", including doors with pedestrian traffic only to/from terraces or patios (no traffic to/from surrounding grounds), " after "…occupant shoes at all regularly used entrance(s)"

For Part 3a, remove: "locker room". Add: "changing room"

For Part 1b, add: "(sum of indoor and outdoor length)" after "primary direction of travel"

Remove: "Permanent" from title of Part name.

For projects that have an entryway walk off system that is less than 10 feet in length, but no smaller than 9’6’’, temporary rollout mats may be used during potential inclement weather (i.e. a 30% chance or higher) to bring the walk-off system up to 10 feet in length. In addition, projects must commit to cleaning the entrance/lobby multiple times daily, and demonstrate this through a cleaning plan. Provide the cleaning plan as well as a narrative detailing the project policy regarding rollout mats and inclement weather.

The requirements of Part 2 (Entryway Seal) may be met by controlling building pressure according to the following requirements:

- An indoor pressure sensor must be installed in the building lobby and near any other entrance to the building from the outside. The pressure sensor must be capable of providing automatic readings on a frequency of at least one per hour.
- The project team must specify the targeted building pressurization levels for these locations for when the building is in both cooling mode and heating mode. The pressure levels must keep outside air from entering the building (more than standard practice), allow occupants to open and close doors easily, and must not cause undue condensation or other moisture problems due to exfiltration through the building envelope.

To document this alternative path, the project team must provide the following in the documentation application submission:
- A narrative describing the targeted building pressurization levels for both cooling mode and heating mode.
- A narrative (and other supporting documentation as necessary) demonstrating that the pressure levels keep outside air from entering the building (more than standard practice), allow occupants to open and close doors easily, and do not cause undue condensation or other moisture problems due to exfiltration through the building envelope.
- Indoor pressure readings demonstrating one day of pressure sensor readings from a cooling period, and one day of pressure sensor readings from a heating period. The exhaust and supply sequences must be provided to demonstrate that the desired pressure readings will be achieved.

c. Any other mMaterial manufactured as an entryway walk-off system, at least the width of the entrance and 3 m [10 ft] long in the primary direction of travel (sum of indoor and outdoor length).

The Malaysian SIRIM QAS certification scheme for cleaning products has been accepted as an alternative for the requirements of Feature 09 Part 1b.

The Global GreenTag Standard v4.0 and PhD Methodology are not accepted as alternatives for the requirements of Feature 09 Part 1 because the requirements of GreenTag do not match those of these WELL features.

In system diagram, add: "Respiratory" and "Integumentary" to diagram and to list under diagram of body system

The Eco Mark Program has been accepted for Feature 09, Part 1.

Remove: "a. A list of high-touch and low-touch surfaces in the space (See Table A1 in Appendix C)". Add: "a. The Cleaning Equipment and Training section of Table A4 in Appendix C"

Remove: "c. A cleaning protocol and dated cleaning logs that are maintained and available to all occupants". Add: "c. A list of high-touch surfaces and schedule of sanitization or disinfection as specified in the Disinfection and Sanitization section in Table A4 in Appendix C"

Remove: "e. The Cleaning Equipment and Training section of Table A4 in Appendix C". Add: "e. Dated cleaning logs that are maintained and available to all occupants"

SCS has been approved as an acceptable alternative for Feature 9 Part 1, Requirement d.

Add Part 1e with the following text: 'The Cleaning Equipment and Program Protocol section of Table A4 in Appendix C.'

The Good Environmental Choice of Australia (GECA) Standard CPv2.2i-2012 (Cleaning Products) has been deemed accepted as an alternative for the requirements of Feature 09 Part 1.

The A.I.S.E. Charter for Sustainable Cleaning has been accepted as an alternative for Requirement (d) of Feature 9 Part 1.
Note that Multifamily Residential Pilot projects are required to meet GS-49 for residential cleaning services rather than GS-42.

In Part 1 description, change “… a cleaning plan is created and presented…” to “… a cleaning plan is created in accordance with Table A4 in Appendix C and presented…”

Hong Kong's Pesticides Ordinance (Cap. 133) has not been accepted as an equivalent for the San Francisco Environment Code Integrated Pest Management (IPM) program of Feature 10 Part 1.

The San Francisco Environment Code IPM program requires least toxic pesticides to have warnings about toxicity to fish or other aquatic life, birds, wildlife, or honeybees. The proposed ordinance only states safety for warm blooded mammals.

In 17 Jan, 2017 EP, remove: "UK Regulations Directive 2009/128/EC has". Add: "UK Plant Protection Products (Sustainable Use) Regulations 2012 have"

For Part 1b, remove: "hazard-ranked". Add: "with a Hazard Tier ranking of 3 (least hazardous)" after "Use of pesticides"

Biopesticides registered with the Central Insecticides Board and Registration Committee (CIBRC) of India have been accepted as an alternative for the requirements of Feature 10 Part 1b.

Biopesticides registered with the Central Insecticides Board and Registration Committee (CIBRC) of India has been accepted as an alternative for the requirements of Feature 10 Part 1b.

Remove: "Pestcide and herbicide use is minimized by creating a use plan based on Chapter 3 of the San Francisco Environment Code Integrated Pest Management (IPM) program". Add: "The creation of a pest management plan in place of pesticide/herbicide use, based on Chapter 3 of the San Francisco Environment Code Integrated Pest Management (IPM) program"

The UK Plant Protection Products (Sustainable Use) Regulations 2012 have been approved for F10, Part 1, Requirement a. Adopting organic farming principles described in Council Regulation (EC) No 834/2007 of 28 June 2007 has been approved as an acceptable method to comply with F10 Part 1, Requirement b.
Note that:
1. Any envisaged exemptions adopted from the SF IPM program has to be listed.
2. The public has to be notified of any pesticides use under exempt conditions
3. Annual update of the IPM plan
4. Display the IPM plan in the building communal area and/or on website
5. Engage organic gardening professional for design of landscaping, and if infestation occurs
6. Ensure that ongoing use of IPM is part of any FM contract that manages the landscaping

Under Part 1b, remove "Reduced Risk Pesticide List" and replace with "Hazard Tier Review Process"