WELL Rating
WELL Rating connects the quality of the indoor environment with the way people experience commercial buildings, workplaces and occupied spaces.
Quick Answer
WELL Rating relates to indoor environmental quality by providing a structured framework for understanding how buildings affect the people inside them. It considers environmental and operational conditions such as air quality, water, nourishment, light, movement, thermal comfort, sound, materials, mind and community.
In commercial buildings, WELL helps connect occupant experience with building systems, fitout decisions, ventilation, daylight, acoustic conditions, thermal comfort and ongoing operations. It is not an energy-only rating. It sits within the occupant-environment layer of commercial building performance.
Indoor environmental quality describes the conditions people experience inside a building. These conditions include the air they breathe, the temperature they feel, the daylight they receive, the noise they hear, the materials around them and the way the space supports daily use.
In a commercial building, indoor environmental quality is shaped by both design and operation. The façade, glazing, mechanical ventilation system, lighting design, acoustic treatment, material selection, internal planning and maintenance practices all influence how the occupied environment performs.
This is why indoor environmental quality cannot be treated as a soft workplace preference. It is a building performance issue. Many of the conditions occupants notice are created by technical systems and design decisions that can be modelled, reviewed, managed or improved.
The WELL Building Standard gives project teams a way to consider the relationship between people and the built environment. Rather than looking only at energy, compliance or asset performance, WELL asks how internal conditions influence the experience of occupants.
This makes WELL particularly relevant to commercial buildings, workplaces, fitouts and existing assets where occupant experience, tenancy quality and operational building performance are closely connected.
A WELL-focused review may consider whether the building supports appropriate ventilation, visual comfort, acoustic control, thermal comfort, material quality and operational management. These conditions do not exist separately. They work together to shape the way a building is used and experienced each day.
WELL is organised around concept areas that help describe different relationships between occupants and the indoor environment. For building performance teams, these concepts are useful because they translate broad ideas about health, comfort and wellbeing into more specific environmental and operational themes.
Air quality is shaped by ventilation, filtration, pollutant control, outdoor air supply, maintenance and the way spaces are occupied.
Daylight, electric lighting, glare control, façade design and visual comfort all influence how internal spaces are experienced.
Comfort depends on temperature, radiant heat, humidity, air movement, solar exposure, clothing, activity and control strategy.
Background noise, speech privacy, reverberation, mechanical noise and acoustic separation affect concentration and usability.
Commercial buildings are not only assessed by how they look or how efficiently they operate. They are also judged by how well they function as occupied environments. A building that is difficult to ventilate, uncomfortable in summer, affected by glare or acoustically disruptive may not perform well for the people using it, even if it appears strong on paper.
WELL helps bring these occupant-facing conditions into a clearer framework. It allows project teams to discuss air, light, comfort, sound, material choices and operational practices in a more structured way.
This can be useful for new commercial projects, workplace fitouts, existing building upgrades, tenant discussions and broader sustainability strategies where internal environmental quality is becoming part of the asset conversation.
One of the common misunderstandings about WELL is that it is an energy rating. WELL is related to building performance, but it is not primarily designed to measure energy efficiency, carbon emissions or code compliance.
Instead, WELL focuses on the quality of the internal environment and the conditions people experience within a building. It can sit beside frameworks such as NABERS, Green Star, Section J, JV3, thermal comfort modelling, daylight modelling and CFD as part of a broader commercial environmental performance strategy.
This distinction matters because energy performance and occupant environmental quality are connected, but they are not identical. A high-performing commercial building needs to consider both the operational performance of the asset and the experience of the people inside it.
Building performance modelling can help project teams understand indoor environmental quality before a building is occupied. Thermal comfort modelling can identify areas where temperature, radiant heat or air movement may affect comfort. Daylight modelling can help assess daylight availability, glare risk and visual comfort. CFD modelling can help review airflow, ventilation behaviour and environmental movement in complex spaces.
These modelling pathways do not replace WELL Certification, but they can support better design and coordination decisions. They help connect the WELL conversation back to the physical behaviour of the building.
Related Knowledge Hub
For a broader overview of WELL Rating, WELL Certification, WELL requirements, indoor environmental quality and commercial building performance, visit the Certified Energy WELL Rating Knowledge Hub.
Read the WELL Rating Knowledge Hub