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INTRODUCTIONDynamic. Resilient. Validated.WELL v2 has graduatedThe WELL Building Standard version 2 (WELL v2 ) is a vehicle for buildings and organizations to deliver morethoughtful and intentional spaces that enhance human health and well-being. WELL v2 includes a set of strategies—backed by the latest scientific research—that aim to advance human health through design interventions andoperational protocols and policies and foster a culture of health and wellness. Built upon the pioneering foundation ofthe first version of the WELL Building Standard (WELL v1), WELL v2 draws expertise from a diverse community of WELLusers, practitioners, public health professionals and building scientists around the world.HOW DID WE GET HERE?The role buildings can play in human health and well-being has never been more evident or more important. Thanks toan evolving evidence base, we understand more about the relationship between the physical environment and humanhealth than ever before. We know how to create spaces that enhance – rather than hinder – health and well-being. Wecan measure – and then improve – the quality of our air, water and light. We can design environments that fuel ourbodies, move us, keep us connected, inspire our best work and facilitate a good night's sleep.With WELL as our vehicle, IWBI helps to translate what we know into what we practice. We aspire to transform buildingsand organizations in ways that advance health and well-being to help people thrive. This has been our mission since welaunched WELL in 2014. And today, we know much more about how to achieve our goals. We’ve channeled all that wehave learned into a more accessible, adaptable and equitable rating system, which continues to be anchored by thelatest scientific research and industry best practices and serves as the foundation upon which the entire WELL ecosystemis built.Since the launch of the WELL v2 pilot in 2018, we’ve worked tirelessly to incorporate feedback from thousands ofmembers of our global community. During the two-year pilot phase, WELL v2 underwent improvement and refinementthrough a rigorous process, including a six-month public comment period and a final stakeholder review, garneringhundreds of market insights across the two phases. Throughout the pilot, we also published quarterly addenda to clarifyand streamline implementation for projects around the world. In addition, the IWBI Task Force on COVID-19, comprisedof 16 co-chairs and nearly 600 leaders and experts from 30 countries, collectively crowdsourced hundreds of commentsduring a 40-day sprint to assess how WELL v2 could be further strengthened to better support prevention andpreparedness, resiliency and recovery.The evolution of WELL v2 was supported by more than 150 WELL concept advisors. Concept advisors have expertise inone or more of the ten WELL concepts and provide input on solutions to health and wellness concerns, best practicesfor localization, case studies to fill research gaps and innovative topic areas. Their expertise and input supported IWBI’sStandard Development team, comprised of experts in each of the ten WELL concepts, at every turn, and helped takeWELL to new heights.In 2020, IWBI formed our Governance Council comprised of key global thought leaders, doctors, public healthprofessionals and business executives. The IWBI Governance Council is tasked with a dual purpose to uphold theintegrity of the WELL Building Standard development process and accelerate market transformation at a global scale.The first task of the Governance Council was to vote to confirm that WELL v2 met defined best practices for standarddevelopment and that each WELL feature met four tenets:1. Evidence-based. Each WELL feature is underscored by available evidence that links design, policy and builtenvironment strategies to health and well-being outcomes. Features are substantiated by a diverse and rigorousevidence-base, including peer-reviewed literature; academic research; and leading design standards, laws, codesand best practices.2. Verifiable. All WELL features are third-party verified by GBCI through documentation and/or performance testing.3. Implementable. All WELL v2 features haves been tested through WELL v1 and/or WELL v2 pilot demonstratingadoption and uptake by projects across the world. Copyright 2020 International WELL Building Institute, pbc. All Rights Reserved.Page 1 of 365

4. Presented for outside input. At every step of the way, IWBI gathered feedback from a diverse community ofpractitioners, subject matter experts, users and other third parties to inform the development and evolution ofWELL.When put to the vote, in June 2020, the esteemed members of the IWBI Governance Council unanimously agreed thatevery single feature in WELL v2 meets the tenets outlined above. Following this rigorous review process leveraginginternationally recognized standard development best practices, WELL v2 has demonstrated it is resilient, verified anddynamic.PRINCIPLES OF WELL V2This latest version of WELL has proven itself to be a scalable and globally applicable feature set that’s responsive,inclusive and adaptable to fit any environment or organization seeking to elevate human health and promote wellnessfor all.WELL v2 is founded on the following principles:Equitable: Aims to benefit a variety of people, including and especially disadvantaged or vulnerable populations.Global: Proposes interventions that are feasible, achievable and relevant across many applications throughout theworld.Evidence-based: Draws upon a diverse and rigorous body of research across varying disciplines, validated by acollaborative body of experts, including IWBI advisors.Technically robust: Defines industry best practice and validates strategies through performance verification and arigorous third-party verification process.Customer-focused: Sponsors the success of WELL users through dedicated coaching services, dynamic resourcesand an intuitive platform for navigating the journey.Resilient: Keeps pace with advances in research, science, technology and society, continuously improving byintegrating new findings.ARCHITECTURE OF THE RATING SYSTEMWELL v2 consolidates previous iterations and pilots into a single rating system that is designed to accommodate allproject types and sectors. The system is intended to grow in specificity and specialty over time, adapting toaccommodate diverse project types and geographies and in response to new evidence and ever-evolving public healthimperatives.TEN CONCEPTSThere are ten concepts in WELL v2:Each concept consists of features with distinct health intents. Features are either preconditions or optimizations.UNIVERSAL PRECONDITIONSPreconditions define the fundamental components of a WELL Certified space and serve as the foundation of a healthybuilding. WELL v2 offers a universal set of preconditions for all projects.All preconditions – including all parts within them – are mandatory for certification. Copyright 2020 International WELL Building Institute, pbc. All Rights Reserved.Page 2 of 365

FLEXIBLE OPTIMIZATIONS WITH MEANINGFUL WEIGHTINGSOptimizations are optional pathways for projects to meet certification requirements in WELL. Project teams may selectwhich optimizations to pursue and which parts to focus on within each optimization.WELL v2 operates on a points-based system, with 110 points available in each project scorecard. All optimizations areweighted with varying point values. The maximum point value of a feature is determined by the sum of its parts. A part isweighted by its potential for impact, defined as the extent to which a feature addresses a specific health and wellnessconcern or opportunity for health promotion, and the potential impact of the intervention.Note: for some optimizations, achieving points in one part is contingent upon achieving points in another part.DYNAMIC SCORECARDThe WELL digital platform guides project teams through the development of a unique scorecard. The digital platformrecommends a selection of features based on project-specific parameters that can be further defined and refined by theproject team.PERFORMANCE VERIFIED FEATURESWELL is a performance-based system. Every WELL project is verified through on-site testing of building performance.This practice is fundamental to high-performing buildings and helps project teams better understand the relationshipbetween the physical environment and human health.The process for on-site assessments and testing is called Performance Verification. On-site measurements are taken forvarious air and water quality parameters, as well as sound and light levels. It is a distinct process from traditional buildingcommissioning and assures that the building performs as intended, according to WELL requirements.Performance Verification is completed by an authorized WELL Performance Testing Agent, who usually spend one tothree days in the building to validate the project's documentation and complete a series of performance tests, spotchecks and measurements covering all WELL concepts. Testing is completed according to IWBI's sampling protocolsavailable in the WELL Performance Verification Guidebook.PROJECT TYPESWELL v2 projects fall into one of two main groups, determined primarily by ownership type:Owner-occupied: The project is mainly occupied by the project owner (which may be different than the buildingowner).WELL Core: The project owner occupies a small portion of the project area and rents/leases most of the space toone or more tenants.OWNER-OCCUPIED PROJECTSOwner-occupied projects are owned or leased by the project owner, and regular occupants (e.g., employees) areaffiliated with the project owner. Owner-occupied projects are awarded WELL Certification at the Bronze, Silver, Gold orPlatinum level (see Scoring and Certification Levels below).Interiors represent a particular case of owner-occupied projects, where the project owner rents/leases space within alarger building (the "base building") that is less than half the size of the base building. Interiors projects operate like otherowner-occupied projects, but in some cases, they can receive credit for amenities within the base building (see ProjectBoundary below). In other instances, interiors projects may be required to collaborate or work with the building owneror landlord to meet feature requirements that apply to building systems or spaces outside of the project owner's control,such as the HVAC system.WELL CORE PROJECTSWELL Core is a distinct pathway for core and shell buildings (also known as base buildings) seeking to implementfundamental features to benefit tenants. In these projects, the majority of regular occupants are not affiliated with theproject owner. Any building type can register for WELL Core, provided that at least 75% of the project area is occupiedby one or more tenants and/or serves as common space in the building accessible to all tenants. Note that officesaffiliated with the project owner but unrelated to the management of the project property may be considered a tenant, Copyright 2020 International WELL Building Institute, pbc. All Rights Reserved.Page 3 of 365

as long as additional tenants unaffiliated with the project owner occupy at least 60% of the net leased area. WELL Coreprojects are awarded WELL Core Certification at the Bronze, Silver, Gold or Platinum level (see Scoring and CertificationLevels, below)Mixed-use buildings where WELL Core is appropriate for at least 60% of the project area may register the entire buildingfor WELL Core. Areas operated/occupied by the project owner are considered "non-leased space" (see Scope andApplicability below). Non-leased spaces include the common areas of the building and private spaces directly under thecontrol of the building management team. Mixed-use buildings where WELL Core is appropriate for less than 60% of theproject area should register one or more portions of the building as individual projects for WELL Certification or WELLCore Certification, as appropriate.FEATURE APPLICABILITY AND SCORINGFeatures have varying scopes of applicability for WELL Core projects, depending on the relevant population and projectarea. For example, some features, such as daylighting (L05) or bicycle storage (V04), must be met across the entirebuilding. Other features apply only to spaces or personnel under the purview of the project owner, such as offeringhealthcare (C06) or childcare (C10) benefits.Applicability designations are defined as follows:Whole Building : Includes all areas within the project boundary. Some features indicate that projects can achieve afeature by providing a tenant budget. To use this pathway, project teams need to submit as part of documentationreview, design assumptions and sample cut-sheets (as applicable) that justify the budget and can be used by thetenant during their design and construction process.Extent of Developer Buildout: Includes all non-leased space and all construction within the leased space for whichthe project team is responsible.Leased Spaces: All areas within the project boundary that are leased to or owned by tenants, including areas forlease or for sale that are not currently occupied.Non-leased Spaces: All areas within the project boundary that are not considered leased space.Building Management Staff: Individuals responsible for maintaining and operating the building, includingcontractors and sub-contractors. Workers who spend less than 30 hours per month in the building (i.e., who arenot regular occupants) are not considered building management staff.Direct Staff: Building staff under direct employment by the project owner. Note: If a project has no direct staff onsite (i.e., the building is entirely operated by contracted building management staff), the project is allowed to earnpoints by meeting feature requirements for all or a defined subset of building management staff. Projects must usea single consistent population across all