WELL Performance Verification Testing (PVT)
Discover how your building truly performs in real-world conditions. WELL Performance Verification and Performance Testing provide objective, science-based data on indoor environmental quality and confirm whether health and well-being strategies work effectively in practice. As the first accredited WELL Performance Testing Provider in the Czech Republic, we deliver professional on-site testing for WELL certification and recertification projects in Prague and across the CEE region.
Lenka Matějíčková
Sector Leader
Sustainability
T: +420 602 707 457
E: lenka.matejickova@grinity.com
Petr Schorsch
Sector Leader
LEED & Energy
T: +420 725 997 207
E: petr.schorsch@grinity.com
WELL Performance Verification Testing (PVT)
WELL Performance Verification (PV) is the final stage of the WELL certification process – independent, on-site testing that confirms whether the health and well-being strategies implemented in a building function effectively in real-world conditions.
Through measurable, science-based WELL Performance Testing, our expert team assess whether your building meets the performance requirements of the WELL Building Standard and provides an indoor environment that supports the health, comfort, and well-being of its occupants.
We have been the first accredited WELL Performance Testing Provider (PTP) in the Czech Republic. Based in Prague, we provide professional WELL Performance Verification and WELL Performance Testing services for projects in Prague and across the CEE region.
What Is WELL Performance Verification?
WELL Performance Verification determines whether the design and operational strategies implemented within a building translate into actual, measurable performance. Rather than evaluating only what a building was designed to achieve, WELL Performance Testing measures the conditions that occupants experience in the building every day.
Our accredited WELL Performance Testing Agents (PTA) carry out all required on-site measurements in accordance with the WELL Performance Verification Guidebook (PVGB) methodology.
Testing covers key areas of indoor environmental quality, including:
- Air quality
- Water quality
- Lighting
- Acoustics
- Thermal comfort
Together, these parameters provide measurable evidence of how the building environment performs for the people who use it.
WELL Performance Testing for Initial Certification and Recertification
We carry out WELL Performance Testing for both initial WELL certification and recertification. Following the three-year certificate validity cycle, Performance Verification is carried out again as part of the recertification process to confirm that the building continues to meet the required WELL performance criteria.
This makes Performance Verification more than a one-time assessment. It provides objective data on whether the building continues to deliver the intended conditions for occupant health, comfort, and well-being over time.
The Entire WELL Performance Verification Process Under One Roof
Thanks to our own accreditation as a WELL Performance Testing Provider, we manage the entire Performance Verification process under one roof.
Our services include:
- Scheduling the on-site measurement date
- Coordinating the testing process with the on-site project or facility team
- Carrying out all required WELL Performance Testing
- Evaluating the measurement results
- Delivering the results
- Managing follow-up communication with IWBI
This integrated approach simplifies coordination and gives the project team a single point of contact throughout the Performance Verification process.
Why Is WELL Performance Testing Important?
The indoor environment is more than simply the place where people work, live, or spend their time. It acts as a biological interface that can influence multiple systems of the human body. By measuring actual environmental conditions within the building, WELL Performance Testing helps determine whether your indoor environment:
- Supports occupant health, comfort, and overall well-being
- Meets rigorous, science-based WELL performance thresholds
- Delivers on design and operational expectations
- Identifies opportunities for improvement and optimization
- Provides objective data on actual building environment performance
Through comprehensive building environment performance testing, we evaluate how the space performs for the people who use it and provide measurable evidence of its indoor environmental quality.
The parameters assessed during WELL Performance Verification represent essential measurable factors of building environment performance, each directly connected to human health, comfort, well-being, and productivity.
WELL Performance Testing in Prague and the Czech Republic
As an accredited WELL Performance Testing Provider in the Czech Republic, we support projects through the on-site Performance Verification process from measurement planning to final results and communication with IWBI. Whether your project is undergoing its initial WELL certification or WELL recertification, our team provides the accredited on-site testing required to verify how the building performs in practice.
The parameters below represent the essential measurable factors of building environment performance assessed during WELL Performance Testing - each directly connected to human health, comfort, well-being, and productivity.
AIR
Clean, healthy air is one of the most important components of a high-performing building environment. It is also a core indicator of overall building wellness and occupant well-being.
As part of WELL Performance Testing, we perform comprehensive indoor air quality (IAQ) assessments to measure the concentration of key pollutants, including:
- Particulate Matter: PM2.5, PM10
- Organic Gases: Formaldehyde, Toluene, Benzene
- Inorganic Gases: Carbon Monoxide (CO), Ozone (O₃), Nitrogen Dioxide (NO₂)
- Radon
Why Do We Test Air Quality in Building Environments?
Poor indoor air quality is directly associated with a range of significant health impacts, including respiratory and cardiovascular disease, headaches, dry throat and eye irritation, more frequent asthma attacks, an increased risk of certain cancers.
WELL sets strict, science-based thresholds for indoor pollutants to:
- Reduce long-term health risks
- Improve cognitive function and overall occupant performance
- Verify that building systems are delivering clean, healthy indoor air
- Support continuous improvement in building environment quality
Through precise measurement and data-driven validation, air quality testing helps ensure your building provides a safe, healthy, and high-performing environment for everyone inside.
WATER
We test both water quality indicators and drinking water quality to ensure that buildings deliver safe, clean water essential for occupant health and well-being. Through WELL Performance Testing, we verify whether water systems protect from microbial contamination, chemical pollutants, and other risks that may affect long-term health.
We measure two primary indicators:
- Turbidity
- Total coliform bacteria
These parameters help us evaluate filtration effectiveness, the sanitary integrity of the water supply, and whether supplemental filtration or disinfection may be needed. Turbidity and coliform levels can signal microbial contamination, treatment system failures, reduced disinfectant performance, and both aesthetic and safety concerns. Elevated turbidity, in particular, can shelter microorganisms and lower the effectiveness of disinfectants. Controlling these indicators is essential to maintaining safe, high-quality water for building occupants.
Drinking Water Quality
We also assess a broad range of chemical parameters, including:
- Chemical contaminants: lead, copper, arsenic, and others
- Disinfection byproducts: THMs, HAAs
- pH and free chlorine levels
- Additional regulated chemical indicators
Water chemistry can vary significantly due to natural mineral deposits, industrial or agricultural runoff, corrosion within plumbing systems, or reactions between disinfectants and organic matter that create harmful byproducts. Such contaminants may contribute to long-term cancer risks, organ damage, or exposure to heavy metals.
Comprehensive testing ensures that drinking water meets science-based health thresholds and supports a safe, reliable water supply for all building occupants.
LIGHT
We test both visual and circadian lighting conditions to ensure that building environments provide appropriate light levels that support comfort, productivity, and well-being across different age groups and activities.
Visual Lighting (Illuminance Levels)
Our evaluation includes:
- Light level measurements (lux levels) on work surfaces
- Evaluation of lighting uniformity
- Comparison to recommended illuminance levels
- Age-appropriate lighting assessment
Appropriate visual lighting enhances task accuracy, comfort, perception of space, and overall safety while helping to reduce eye strain for building occupants.
Circadian Lighting (Vertical Illuminance at Eye Level – EML)
We measure vertical illuminance at eye height, along with the spectral characteristics, timing, and duration of light exposure.
This provides insight into whether a space delivers adequate circadian stimulus to support human biological rhythms.
Proper circadian lighting plays a key role in sleep quality, hormone regulation, mood, and metabolic health. Disruptions to the circadian cycle have been linked to conditions such as obesity, diabetes, depression, increased cancer risk, and poor sleep. By validating circadian lighting performance, we help ensure that indoor environments align with occupants’ internal clocks, which are fundamental to human well-being.
THERMAL COMFORT
We measure key thermal comfort parameters to evaluate whether indoor environments provide stable, comfortable conditions for the majority of occupants. Our assessment includes:
- Air temperature
- Mean Radiant Temperature (MRT)
- Air movement
- Relative humidity
- Metabolic rate and clothing assumptions
- Thermal performance across individual zones
These measurements determine compliance with established thermal comfort models, such as the PMV/PPD and adaptive comfort standards.
Thermal comfort directly impacts productivity, cognitive performance, mood, and overall health. Poor thermal environments can lead to overheating, contributing to respiratory difficulties, fatigue, and stress, while cold conditions may cause musculoskeletal strain and persistent discomfort. In some cases, inadequate thermal control is also associated with symptoms of sick building syndrome.
Through comprehensive testing, we ensure that thermal conditions support occupant well-being, minimize discomfort, and reflect optimized building performance.
SOUND
We measure key acoustic parameters to understand how sound behaves within the building environment and how it affects occupant comfort, focus, and overall well-being. Our assessment includes:
- Ambient background noise levels
- Reverberation time (RT)
- Sound insulation and sound barriers
- Speech clarity indicators
Testing considers both internal and external noise sources that influence the acoustic experience of the space.
Excessive noise levels have been shown to reduce concentration and task performance, increase stress and cognitive fatigue, and contribute to cardiovascular issues such as hypertension and stroke. In educational settings, poor acoustics can also impair reading comprehension and learning performance.
Proper acoustic performance enhances speech intelligibility, privacy, and cognitive ease while improving overall environmental satisfaction. Effective sound management is a key component of a supportive and comfortable building environment.
