WELL Addenda

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."

CEN Standards EN 15251:2007 and EN 13779:2007 may be used in lieu of ASHRAE 62.1-2013 for Feature 03, Part 1.

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).

Projects must meet Category I and II as described in the standards.

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

All standards accepted by LEED and BREEAM based on current European (EN) and international (ISO) standards are equivalent standards for Feature 4, Part 1. Note that projects must adhere to the "Additional VOC content requirements for wet-applied products" section (found in the Low Emitting Materials Credit of LEED v4 BD+C, under Emissions and Content Requirements) or to the Volatile organic compound (VOC) emission levels for products (found in Table 18 in the BREEAM UK New Construction 2014). All newly applied paints and coatings must be in compliance.

All standards accepted by LEED and BREEAM based on current European (EN) and international (ISO) standards are equivalent standards for Feature 4, Part 2. Note that projects must adhere to the "Additional VOC content requirements for wet-applied products" section (found in the Low Emitting Materials Credit of LEED v4 BD+C, under Emissions and Content Requirements) or to the Volatile organic compound (VOC) emission levels for products (found in Table 18 in the BREEAM UK New Construction 2014). All newly applied adhesives and sealants must be in compliance.

All standards accepted by LEED and BREEAM based on current European (EN) and international (ISO) standards are equivalent standards for Feature 4, Part 3. Note that projects must adhere to the "Additional VOC content requirements for wet-applied products" section (found in the Low Emitting Materials Credit of LEED v4 BD+C, under Emissions and Content Requirements). Projects wishing to use BREEAM as an alternative must achieve BREEAM Exemplary level (2 credits) in order to be compliant. All newly installed flooring must be in compliance.

All standards accepted by LEED and BREEAM based on current European (EN) and international (ISO) standards are equivalent standards for Feature 4, Part 4. Note that projects must adhere to the "Additional VOC content requirements for wet-applied products" section (found in the Low Emitting Materials Credit of LEED v4 BD+C, under Emissions and Content Requirements). All newly installed insulation must be in compliance.

All standards accepted by LEED and BREEAM based on current European (EN) and international (ISO) standards are equivalent standards for Feature 4, Part 5. Note that projects must adhere to the "Furniture Evaluation' section (found in the Low Emitting Materials Credit of LEED v4 BD+C, under Emissions and Content Requirements). Additionally, 95% (by cost) of all newly purchased furniture and furnishing must be in compliance.

Green Star Credit 13: Indoor Pollutants is considered partially equivalent to WELL Feature 04: VOC reduction.
Compliance with the Green Star credit is sufficient to comply with Parts 1 and 2, as well as to a portion of Part 3 (only flooring that is classified as carpeting) of the WELL feature.
Projects will still need to comply with Part 3 (all non-carpet flooring), as well as with Parts 4 and 5 in order to fully comply with the Feature.

GreenGuard Certification is not an accepted equivalent standard to the California Department of Public Health (CDPH) Standard method v1.1-2010 as specified in Part 4a of this feature. Therefore Greenstuf is not an acceptable material for newly installed thermal or acoustic insulation, based on the evidence provided. The excerpt taken from GreenGuard Standard Method for Measuring and Evaluating Chemical Emissions from Building Materials, Finishes and Furnishings Using Dynamic Environmental Chambers refers to the GreenGuard Children and School certification (now GreenGuard Gold Certification), which does in fact meet/exceed CDPH standards. However, according to the Material Safety Data Sheet provided, Greenstuf is GreenGuard Certified and is not GreenGuard Gold Certified.

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"

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

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

Add Owner Letter of Assurance as required documentation.

Change Part 1b from "The system is able to accommodate additional filters" to "The mechanical system is sized to accommodate the additional filters."

Class F 7 (or higher) media filters are an acceptable equivalent to MERV 13 (or higher) media 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 Assessor will confirm the available wall space and examine a copy of all the information given to tenants during the project's Performance Verification.

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.

In the Feature description, remove the second paragraph. Replace with the following text:
'Intent: To reduce mold and bacteria growth within buildings, particularly from water damage or condensation on cooling coils.'

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.'

Change title of Part 3 from "VOC Absorption Management" to "Moisture Absorption Management"

In Part 3a, change "A secure area is designated to store and protect" to "A separate area is designated to store and protect".

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.

Where the options of an entry vestibule or revolving door are not possible for projects with regularly occupied lobbies, projects may create a healthy space by installing stand-alone air filters in the breathing zone near the primary seating of occupants, and near the entrance. A narrative must be included with documentation to describe the contaminants that will be filtered out along with an operations schedule for the maintenance of the air filters.

In areas where building vestibules and revolving entrance doors are not common architectural elements, 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.

In the Feature description, remove the second paragraph. Replace with the following text:
'Intent: To reduce occupant exposure to pathogens, allergens, and harmful cleaning chemicals.'

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"

In the Feature description, remove the second paragraph. Replace with the following text:
'Intent: To reduce the presence of pests in buildings and minimizing occupant exposure to harmful chemicals.'

In Part 1 description, change "The following conditions are met for all pesticides and herbicides used on plants:" to "The following conditions are met for all pesticides and herbicides user on outdoor plants."

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.'

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

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

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.'

In lieu of performing envelope commissioning in accordance with ASHRAE Guideline 0-2005 and NIBS Guideline 3-2012 for new construction or structural renovation), the project may complete a thermographic survey, airtightness test, and inspection and correction of defects in accordance with ATTMA TSL2 guidelines.

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.'

Change Part name from "Increased Fresh Air Supply" to "Increased Outdoor Air Supply"

In Part 1a, change "Exceed ASHRAE fresh air supply rates" to "Exceed ASHRAE outdoor air supply rates"

In the Feature description, remove the second paragraph. Replace with the following text:
'Intent: To limit the growth of pathogens, reduce off-gassing, and maintain thermal comfort by providing the appropriate level of humidity.'

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.'

In the Feature description, remove the second paragraph. Replace with the following text:
'Intent: To monitor and effectively remediate indoor air quality issues and inform building managers and occupants of the quality of the indoor environment.'

In Part 1 description, change "Monitors measure 2 of the following pollutants in a regularly occupied space" to "Monitors measure 2 of the following pollutants in a regularly occupied or common space"

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

Add Owner Letter of Assurance as required documentation, remove Architect Letter of Assurance.

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.'

In the Feature description, remove the second paragraph. Replace with the following text:
'Intent: To improve air quality in the breathing zone of the room and maintain thermal comfort by supplying low velocity outdoor air near the floor and expelling near the ceiling.'

In the Feature description, remove the second paragraph. Replace with the following text:
'Intent: To reduce the presence of pests in buildings and minimize occupant exposure to pest-related allergens.'

Change Part 1 verification type from Visual Inspection to Operations Schedule and Spot Check.

In the Feature description, remove the second paragraph. Replace with the following text:
'Intent: To improve recirculated indoor air quality through the implementation of advanced air purification strategies.'

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.'

To the last line of the first paragraph of the feature description, add: "All parts of this feature only apply to materials installed inside the weather proofing membrane of a project. (Please refer to Table A3 for additional details)"

Add Contractor Letters of Assurance as required documentation.

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

In the Feature description, remove the second paragraph. Replace with the following text:
'Intent: To reduce occupant exposure to both harmful pathogens and hazardous cleaning agents.'

In the Feature description, remove the second paragraph. Replace with the following text:
'Intent: To reduce occupant exposure to pathogens on high-touch surfaces.'