Enhancements to WELL

The WELL Building Standard (WELL Standard) undergoes regular maintenance to ensure the rigor, feasibility and impact of the program. During this process, IWBI publishes changes that aim to clarify language, streamline the WELL program, enable projects to pursue novel pathways and more. The vast majority of changes made to the WELL Standard are intended to present language more clearly, based on feedback received from the WELL community. Occasionally, and often based on new evidence, we make more substantive adjustments to the program that impact the way that a feature is implemented, documented or evaluated.

We consider multiple streams of input when determining what changes to make to the WELL Standard. We learn from projects implementing the WELL program in spaces around the world; listen to input from IWBI advisors and working groups; stay abreast of evolving research, standards and best practices; and are in constant conversation with the WELL community to understand how the WELL program can be more rigorous, feasible and impactful.

This feedback is considered by IWBI’s Standard Development Team and, before changes are approved and incorporated, all proposals go through a rigorous internal review process.

You can find a detailed change log here.

Q3 2025 Addenda Overview

Performance Verification Guidebook:

This quarter, all addenda changes were made within the WELL Performance Verification Guidebook. Highlights include:

• VOC continuous monitoring devices: Updating the continuous monitoring devices requirements for resolution and lower limit of range from 1 µg/m³ to 10 µg/m³. This expands the number of eligible devices that projects can use for ongoing monitoring.

• Air monitoring devices: Updated the timeline for calibration and/or replacement of continuous monitoring devices for air quality from one year to three years. This reduces the interval at which teams must manage and document calibration of their devices, therefore reducing costs and streamlining documentation processes.*

• Thermal comfort monitoring devices: Removed the requirement for teams to document calibration and/or replacement of continuous monitoring devices for thermal comfort entirely. This change acknowledges that these devices have a longer lifespan and thus aims to reduce costs and streamline documentation.

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*Note that we made a corresponding change to WELL v2 Feature A08 Part 1 Option 2 and WELL Performance Rating Feature PM2 Part 1 Option 2. Feature language now references a three year calibration period. No other changes have been made to feature language in the WELL Standard.

If you’re looking to leverage newer language for a specific WELL feature, simply make a note in your documentation submission. To benefit from a more streamlined user experience and smoother documentation reviews, consider upgrading your entire account to a newer version. Explore our tutorial to get started or reach out to IWBI via your Support Tab in the WELL platform.

Questions?

Want to learn more about these changes? Contact our support team via your Support Tab in the WELL platform. Customers who are not yet enrolled in WELL programs (WELL) may contact us by filling out this form.