Commercial Indoor Air Quality Testing & Assessment

CRB investigates indoor air quality concerns in commercial and industrial buildings through targeted testing, building evaluations and clear recommendations for next steps.

34+ Years
Environmental Consulting
Nationwide
Commercial IAQ Services
Building & HVAC-Focused
Investigations
Targeted Testing.
Actionable Answers.

What Is Indoor Air Quality (IAQ)?

A woman with curly blonde hair sitting on a black chair, holding a thermal imaging camera aimed at a white wall in a room with wooden flooring.

Indoor air quality (IAQ) refers to the conditions within a building that can affect occupant comfort and the indoor environment. In commercial buildings, IAQ can be influenced by ventilation and HVAC systems, temperature and humidity, building materials, cleaning products, renovation activities, outdoor air and airborne contaminants.

Indoor air quality concerns are not always caused by a single contaminant or identified through a single air test. A commercial IAQ assessment evaluates the building as a whole, including potential pollutant sources, ventilation, HVAC operation and other building conditions, to identify factors that may be contributing to the concern.

When Is a Commercial Indoor Air Quality Assessment Needed?

Commercial indoor air quality testing may be appropriate when building occupants report recurring concerns, unexplained odors develop, ventilation or HVAC issues are suspected, or changes to the building may be affecting indoor conditions.

Occupant or Employee Complaints

Recurring complaints of stuffy air, unusual odors, irritation or discomfort may indicate building conditions that warrant further investigation.

Moisture or Mold Concerns

Water intrusion, condensation, elevated humidity or suspected microbial growth may indicate conditions requiring further evaluation.

Construction or Building Changes

Renovations, tenant improvements, new materials, furnishings or HVAC modifications
can introduce new sources or alter conditions within occupied spaces.

HVAC & Ventilation Concerns

Poor air distribution, inadequate outdoor air, filtration issues or other HVAC conditions can contribute to indoor air quality concerns.

Persistent or Unexplained Odors

Chemical, musty or other unusual odors may
originate from building materials, HVAC systems,
cleaning products, nearby operations or other sources.

Suspected Airborne Contaminants

VOCs, particulate matter, airborne dust and other contaminants may be associated with building materials, facility operations, equipment or outdoor sources.

What Does Commercial Indoor Air Quality Testing Include?

Commercial indoor air quality testing is most effective when it is part of a broader building assessment. Depending on the concern, CRB may evaluate HVAC and ventilation conditions, potential contaminant sources and building conditions alongside targeted testing and sampling.

  • Water intrusion, condensation, elevated humidity and other moisture conditions can contribute to microbial growth and indoor environmental concerns. CRB evaluates visible and suspected moisture-related conditions and can determine whether targeted mold sampling is appropriate.

  • Persistent chemical, musty or unexplained odors can require investigation of potential sources, building conditions and pathways through which odors may travel. CRB evaluates these factors and determines whether targeted air sampling can provide useful information.

  • HVAC operation, outdoor air delivery, filtration, air distribution and pressure relationships can influence indoor environmental conditions. CRB evaluates ventilation and HVAC-related factors as part of a broader IAQ investigation.

  • Volatile organic compounds (VOCs) can be released from building materials, furnishings, cleaning products, coatings, adhesives and facility operations. Targeted VOC testing can help evaluate suspected chemical sources when odors or other building conditions indicate testing may be appropriate.

  • Airborne particles and dust may originate from construction activities, building materials, outdoor air, equipment or facility operations. CRB can evaluate particulate conditions and perform targeted sampling when airborne dust or particulate matter is a concern.

  • Carbon dioxide (CO₂) measurements can provide useful information about ventilation conditions and occupancy when interpreted alongside HVAC operation, outdoor air delivery and other building factors.

  • Carbon monoxide (CO) may be associated with combustion equipment, vehicle exhaust or other combustion sources. Testing may be performed when building conditions or suspected sources indicate a potential concern.

  • Temperature and relative humidity can affect occupant comfort, moisture conditions and overall indoor environmental quality. Measurements are evaluated in the context of HVAC operation, building conditions and reported concerns.

How CRB Investigates Indoor Air Quality Problems

01. Understand the Concern

CRB reviews reported IAQ concerns, affected areas, timing, building history and other available information to help identify potential patterns and investigation priorities.

02. Evaluate Building Conditions

Our consultants assess relevant building conditions, including potential contaminant sources, moisture, HVAC and ventilation factors, recent renovations and other conditions that may be contributing to the concern.

03. Perform Targeted Testing

When testing can provide useful information, CRB selects appropriate measurements or sampling based on the conditions being investigated rather than applying the same testing package to every property.

04. Interpret the Findings

Testing results are evaluated alongside observations from the building assessment to help determine likely contributing factors and the significance of the findings.

05. Recommend Next Steps

CRB provides clear findings and practical recommendations, which may include corrective actions, additional investigation, HVAC or building improvements, remediation or follow-up testing when appropriate.

Effective indoor air quality investigations begin with the building, not a predetermined testing package. CRB evaluates the reported concern, building conditions and potential sources to develop an investigation appropriate for the property.

Indoor air quality testing can provide valuable information about conditions within a commercial building, but there is no single test that can identify every IAQ problem. The appropriate testing strategy depends on the concern being investigated, potential contaminant sources, building conditions and information gathered during the site assessment.

CRB uses targeted measurements and sampling when they can help answer a specific question about the indoor environment. Depending on the investigation, this may include real-time measurements, direct-reading instruments, air sampling or laboratory analysis for selected contaminants.

Indoor Air Quality Testing & Sampling

Targeted Testing Based on the Building

CRB selects testing parameters based on the reported concern, affected areas, building use, HVAC and ventilation conditions, potential sources and observations made during the investigation.

Field Measurements & Air Sampling

Depending on the concern, CRB may evaluate temperature, relative humidity, carbon dioxide, carbon monoxide, particulate matter or other parameters, with targeted air sampling or laboratory analysis when appropriate.

Interpreting Indoor Air Quality Test Results

CRB evaluates testing data alongside site observations, HVAC conditions and potential sources to determine what the findings mean and whether additional action is warranted.

Does Every IAQ Assessment Require Air Testing?

No. Not every indoor air quality assessment requires air sampling or laboratory testing. In some cases, the source of an IAQ concern may be identified through the building investigation, HVAC evaluation, direct measurements or other observations.

When additional testing is warranted, CRB develops a targeted sampling strategy designed to provide information relevant to the specific concern rather than collecting data without a defined investigative purpose.

Commercial Properties & Facilities We Serve

Indoor air quality concerns can vary significantly depending on how a building is occupied, operated and ventilated. CRB provides commercial IAQ assessments and testing for a range of property and facility types, with each investigation tailored to the building conditions, operations and concerns being evaluated.

  • Veterinary hospitals, animal clinics, pet care facilities and grooming environments can present unique indoor air quality challenges related to animal occupancy, odors, cleaning and disinfecting products, ventilation, humidity and high-use areas. CRB provides IAQ assessments and targeted testing to investigate building conditions and potential sources affecting these specialized environments.

    Explore Veterinary & Animal Facility IAQ Services →

  • Healthcare and medical facilities can present IAQ concerns related to ventilation, occupancy, cleaning and disinfecting products, renovations, odors and other building conditions. CRB develops targeted IAQ investigations based on the facility and specific concern being evaluated.

  • CRB supports individual retail properties and multi-site portfolios with IAQ investigations involving occupant or customer complaints, odors, HVAC and ventilation concerns, construction activities and other conditions affecting occupied spaces.

  • CRB provides IAQ assessments for schools and institutional facilities where ventilation, occupancy, building conditions, renovations, odors or reported air quality concerns warrant further investigation.

  • CRB investigates IAQ concerns in offices and commercial buildings involving occupant complaints, odors, ventilation and HVAC conditions, temperature and humidity, renovations, building materials and suspected airborne contaminants.

  • Hotels, multifamily communities and other residential hospitality properties may experience IAQ concerns affecting individual rooms, units, common areas or larger portions of a building. CRB investigates potential sources, HVAC and ventilation conditions and other building factors relevant to the concern.

  • Industrial and manufacturing environments may involve IAQ concerns associated with facility operations, equipment, materials, ventilation, particulates, odors or chemical sources. CRB develops the assessment scope around the specific building conditions and potential contaminants involved.

  • Construction and renovation activities can introduce dust, VOCs, odors and other airborne contaminants while also affecting ventilation and airflow within occupied buildings. CRB can investigate IAQ concerns that develop during or following construction, renovation and tenant improvement projects.

Indoor Air Quality Standards & Guidance

There is no single federal standard that establishes acceptable indoor air quality for every commercial building or indoor contaminant. The regulations, standards and technical guidance relevant to an IAQ investigation depend on the building, workplace conditions, contaminants being evaluated and purpose of the assessment.

OSHA does not have a specific comprehensive indoor air quality standard, although OSHA requirements may apply to specific workplace air contaminants, ventilation systems and occupational exposures. ANSI/ASHRAE Standard 62.1, Ventilation and Acceptable Indoor Air Quality, establishes minimum ventilation and other requirements for applicable nonresidential buildings and is an important industry reference for ventilation-related IAQ conditions. EPA and NIOSH also provide guidance for investigating indoor air quality concerns in commercial and workplace environments, emphasizing evaluation of pollutant sources, HVAC and ventilation conditions, building conditions and other contributing factors rather than reliance on a single air test.

CRB evaluates indoor air quality findings using the regulations, standards, technical guidance and evaluation criteria appropriate to the specific investigation rather than applying a universal pass-or-fail threshold to every building.

  • A commercial indoor air quality assessment evaluates building conditions, HVAC and ventilation systems, potential pollutant sources and environmental conditions that may be contributing to an IAQ concern. Depending on the investigation, CRB may also perform targeted measurements or testing for VOCs, particulate matter, carbon dioxide, carbon monoxide, temperature, relative humidity or other parameters relevant to the building.

  • Indoor air quality testing can evaluate contaminants and environmental parameters such as volatile organic compounds (VOCs), particulate matter, carbon monoxide, carbon dioxide, temperature and relative humidity. The appropriate tests depend on the building and the concern being investigated. CRB selects testing based on potential sources, site observations, HVAC and ventilation conditions, building use and the objectives of the assessment.

  • Persistent or unusual odors, stuffy spaces, recurring occupant complaints, temperature or humidity problems and concerns concentrated in particular areas can indicate a potential indoor air quality problem. Recent renovations, HVAC changes, construction activities or changes in building use may also contribute. An IAQ assessment can help determine whether building conditions, ventilation or potential contaminant sources warrant further investigation or testing.

  • No. OSHA does not have a specific comprehensive indoor air quality standard for general industry or construction. However, OSHA standards may apply to specific air contaminants, ventilation systems or other workplace hazards, and employers remain subject to applicable workplace safety requirements. The regulatory significance of an IAQ condition therefore depends on the contaminant, workplace and circumstances involved.

  • No. There is no single test that can identify every indoor air quality problem. An IAQ investigation may evaluate temperature, humidity, airflow, HVAC and ventilation systems, potential pollutant sources and specific airborne contaminants. CRB selects measurements and testing based on the building and reported concern rather than applying the same testing package to every property.

Frequently Asked Questions About Indoor Air Quality

  • The timeline for a commercial indoor air quality assessment depends on the size and complexity of the property, areas being investigated, nature of the concern and whether laboratory analysis is required. A focused investigation may require less time than a complex or multi-area assessment. CRB establishes the scope and anticipated schedule based on the specific property and project requirements.

  • Commercial indoor air quality problems can result from inadequate ventilation, indoor or outdoor pollutant sources, HVAC operation or maintenance issues, building materials, cleaning products, construction activities, combustion sources, moisture conditions and changes in building use. More than one factor may contribute to the same IAQ concern, which is why identifying potential sources and building conditions is an important part of the investigation.

  • Yes. HVAC and ventilation systems can contribute to indoor air quality problems when outdoor air supply, filtration, air distribution, equipment operation or maintenance are inadequate for building conditions. HVAC systems can also influence how contaminants enter, move through or are removed from occupied spaces, making HVAC and ventilation conditions an important part of many commercial IAQ investigations.

  • Elevated indoor carbon dioxide (CO2) can provide information about ventilation relative to occupancy, but CO2 is not a standalone measure of overall indoor air quality. CO2 measurements should be interpreted alongside occupancy, outdoor concentrations, HVAC operation and other building conditions. A CO2 reading alone does not determine whether other indoor contaminants are present or whether overall IAQ is acceptable.

  • VOC testing may be appropriate when building conditions indicate a potential source of volatile organic compounds, such as paints, coatings, adhesives, furnishings, cleaning products, building materials or certain commercial operations. It may also be useful when chemical odors or IAQ concerns develop following renovation or installation of new materials. CRB determines whether targeted VOC testing will provide useful information based on the specific investigation.

  • Yes. CRB provides commercial indoor air quality assessment, testing and consulting services for projects across the United States. Assessment scopes are developed based on the property, reported concern, building conditions and project objectives, allowing CRB to support individual facilities as well as commercial and institutional projects in multiple markets.