More and more public and private organizations are setting ambitious goals around sustainability and well-being—reducing emissions and energy footprints or creating healthier indoor environments. Achieving LEED and WELL certifications is a tangible step to prove that commitment. These two international standards use measurable criteria to assess and communicate environmental performance and comfort levels in buildings.
This article explains LEED and WELL certifications, how they work, what’s required, and why continuous air quality monitoring plays a key role in the process.
What Defines a Green Building?
A modern design or a new structure alone doesn’t make a building green. A truly green building actively reduces environmental impact, optimizes resource use, protects health, and enhances the quality of life for its occupants.
Key characteristics of a Green Building:
- Uses energy efficiently, avoids waste, and optimizes consumption
- Ensures complete environmental comfort: temperature, humidity, lighting, air, and noise
- Chooses safe, sustainable materials for durability and low impact
- Integrates harmoniously into its urban, natural, and social context
But it’s not enough to claim these results—they must be measured. That’s where LEED and WELL certifications come in, setting shared, verifiable standards to determine whether a building truly meets sustainability goals.
What Are LEED and WELL Certifications?
Environmental certifications provide credible benchmarks for building quality, efficiency, and attention to human and ecological health. LEED and WELL are two of the most respected frameworks worldwide, allowing organizations to demonstrate a commitment to healthy, efficient, and sustainable spaces.
LEED Certification: Leadership in Energy and Environmental Design
Developed by the U.S. Green Building Council (USGBC), LEED is a globally recognized standard for assessing building sustainability.
It uses a point-based system to evaluate design, construction, and operations across several categories: energy efficiency, resource use, comfort, innovation, and regional priorities.
LEED certification levels depend on total points earned:
- Certified (40–49 points): meets basic sustainability requirements
- Silver (50–59): shows notable improvements over standard practice
- Gold (60–79): demonstrates high sustainability performance
- Platinum (80+): rewards excellence in environmental performance
Credits related to indoor air quality include:
- Enhanced Indoor Air Quality Strategies: promotes advanced ventilation and contaminant control
- Low-Emitting Materials: prioritizes low-emission materials
- Air Quality Assessment: requires testing and monitoring after construction
WELL Certification: The WELL Building Standard
Managed by the International WELL Building Institute (IWBI), WELL focuses on human health and well-being. It evaluates ten core concepts: Air, Water, Nourishment, Light, Movement, Thermal Comfort, Sound, Materials, Mind, and Community.
The “Air” concept examines pollutant levels, ventilation systems, filtration, air quality monitoring, and maintenance policies.
WELL combines mandatory features with optional optimizations—each with measurable health impacts.
Examples of minimum air quality targets:
- PM2.5 < 15 µg/m3
- CO2 < 800 ppm
- Relative humidity between 30% and 60%
- Strict limits on VOCs and formaldehyde
Why Air Quality Matters
People spend around 90% of their time indoors. According to WHO, indoor air can be 2 to 5 times more polluted than outdoor air. Energy-efficient buildings can trap harmful substances like VOCs, PM, CO2, and emissions from construction materials, furniture, electronics, and human activity.
Poor air quality causes symptoms like fatigue or headaches and, in more serious cases, respiratory issues or “sick building syndrome”—when multiple occupants experience physical symptoms linked to indoor environments that disappear once they leave.
Improving air quality is more than a key factor in certification, is a strategic investment in employee health and sustainability.
Numerous studies confirm that air quality monitoring significantly boosts health and productivity. Harvard’s Healthy Buildings team found that increases of 500 ppm CO2 or 10 µg/m3 PM2.5 reduce cognitive performance by 1–2%.
Real-time monitoring allows immediate detection of poor air conditions and quick corrective action. Harvard experts say air quality impacts performance and well-being more than lighting or noise.
How to Earn LEED Certification
The LEED certification process includes multiple steps:
- Register the project on the official LEED platform via Green Business Certification Inc. (GBCI)
- Conduct a feasibility study to identify relevant and achievable credits
- Plan and implement design, technology, and management solutions
- Collect and organize all technical documentation with expert support
- Submit documentation for GBCI review, which assigns the final score and certification level
LEED evaluates buildings across several categories:
- Site Sustainability: rewards buildings in developed areas with transit access, avoiding ecologically sensitive zones
- Water Efficiency: promotes indoor and outdoor water-saving systems, drought-resistant plants, and rainwater reuse
- Energy Efficiency and Emissions: considers insulation, use of renewable energy, and monitoring systems; higher scores go to projects with significant CO2 reductions
- Materials and Resources: favors recycled, recyclable, or locally sourced materials
- Indoor Environmental Quality: looks at clean air, ventilation, acoustic comfort, and natural light
- Innovation: awards novel solutions beyond standard criteria
- Regional Priority: grants bonus points for addressing local environmental issues (e.g., air pollution, water scarcity)
To earn indoor environmental quality credits, buildings need:
- Mechanical ventilation systems (VMV) that meet ASHRAE standards
- Low-VOC materials certified by international standards
- Continuous indoor pollutant monitoring for transparency and responsiveness
How to Earn WELL Certification
WELL focuses on real, measurable health outcomes. The main steps include:
- Register the project on the WELL Online platform
- Choose which required features and optional optimizations to pursue
- Implement strategies and gather supporting documentation
- Undergo an on-site audit by a Performance Testing Agent
- Receive certification based on verified results and scores
WELL certification evaluates performance across 10 areas:
- Air
- Water
- Nourishment
- Light
- Movement
- Thermal Comfort
- Sound
- Materials
- Mind
- Community
Under the “Air” category, key requirements include:
- Advanced ventilation and filtration systems that remove pollutants effectively
- Active temperature and humidity control to avoid mold and discomfort
- Smart sensors for real-time monitoring of CO2, VOCs, PM2.5, formaldehyde, and other pollutants, with evidence-based thresholds
How Aircare Supports the Certification Process
Aircare delivers full-featured solutions for environmental monitoring and indoor air quality optimization. We support businesses, schools, healthcare facilities, and public institutions throughout the LEED and WELL certification journey.
Our systems focus on air quality—a core requirement in both frameworks—and extend to energy efficiency and space utilization modules, helping teams earn credits related to resource management, wellness, and comfort.
Our technologies align seamlessly with certification goals, offering reliable data collection and actionable strategies for continuous improvement.
Environmental Monitoring and Smart Automation
The IAQ 2.0 device monitors environmental factors in real time: CO2, TVOC, PM1, PM2.5, PM10, temperature, humidity, atmospheric pressure, light, and noise.
These metrics are essential to verify compliance with LEED and WELL standards. IAQ 2.0 also integrates natively with Building Management Systems (BMS) and HVAC systems, enabling automatic ventilation and climate control adjustments.
This intelligent automation allows timely responses to critical conditions, improves energy efficiency, and ensures consistent comfort.
Dashboards and Data Compliance Tools
Our cloud-based platform provides customizable dashboards and reporting tools. Users can generate periodic reports tailored to certification audits.
Collected data supports compliance documentation for LEED and WELL credits, making performance tracking and reporting easier.
Space Optimization and Energy Efficiency
Beyond air quality, Aircare also offers occupancy and energy monitoring modules. These tools correlate space usage with energy consumption, helping organizations manage resources more efficiently and boost their performance in certification scoring.
Conclusion
Pursuing LEED and WELL certifications means investing in long-term health, sustainability, and organizational value.
Aircare plays a strategic role in this journey by providing advanced technologies that enhance building comfort, efficiency, and environmental responsibility.
To explore how we can help your organization, book an introductory meeting through our Contact section.