Indoor Air Quality Studies
Comprehensive indoor air quality assessment services that identify pollutant sources, evaluate health risks, and develop practical solutions for healthy indoor environments. From homes and schools to offices and healthcare facilities, we provide the expertise needed to ensure safe, comfortable indoor air quality where people spend most of their time.
Healthy Indoor Environments
People spend approximately 90% of their time indoors—in homes, schools, offices, healthcare facilities, and other buildings—where they are exposed to a complex mixture of air pollutants that can significantly impact health, comfort, and productivity. Indoor air pollutants originate from numerous sources including combustion appliances (gas stoves, fireplaces, heaters), building materials and furnishings (formaldehyde, VOCs), cleaning and personal care products, outdoor air infiltration, inadequate ventilation, moisture problems leading to mold growth, and emissions from HVAC systems. Poor indoor air quality has been linked to respiratory symptoms, allergies, asthma exacerbation, headaches, fatigue, and reduced cognitive performance. For vulnerable populations including children, elderly, and those with chronic health conditions, IAQ concerns are even more critical. Comprehensive indoor air quality studies identify pollutant sources, characterize exposure levels, assess health risks, and develop practical remediation strategies tailored to building type, occupancy patterns, and budget constraints.
Henddu's indoor air quality services combine advanced monitoring technology with building science expertise to deliver actionable solutions for healthy indoor environments. We conduct comprehensive IAQ assessments using real-time continuous monitors, passive samplers, and laboratory analysis to measure particulate matter, volatile organic compounds, formaldehyde, carbon monoxide, carbon dioxide, nitrogen dioxide, ozone, radon, temperature, humidity, and ventilation rates. Our building investigations include visual inspections, HVAC system evaluations, moisture assessments, and occupant interviews to identify pollutant sources and contributing factors. We provide detailed reports with clear data presentation, health risk interpretation, and prioritized recommendations for ventilation improvements, source control, filtration upgrades, moisture management, and operational changes. Whether addressing specific IAQ complaints, supporting green building certification, ensuring compliance with IAQ standards, or optimizing building performance for occupant wellbeing, our services deliver the technical rigor and practical guidance needed to create and maintain healthy indoor air quality.
Our IAQ Services
Comprehensive IAQ Assessments
Multi-parameter evaluations of indoor air quality including PM2.5/PM10, VOCs, formaldehyde, CO, CO₂, NO₂, O₃, temperature, humidity, and ventilation rates. Real-time continuous monitoring combined with laboratory analysis for complete characterization.
Building Investigations & Diagnostics
Systematic building surveys identifying pollutant sources, HVAC system performance issues, moisture problems, ventilation deficiencies, and building envelope leakage. Thermal imaging, blower door testing, and duct leakage assessments.
Mold & Moisture Assessments
Investigation of water damage, moisture intrusion, and mold growth. Visual inspection, moisture meter surveys, infrared thermography, air and surface sampling for mold spores. Identification of moisture sources and development of remediation protocols.
HVAC System Evaluations
Assessment of heating, ventilation, and air conditioning systems including ventilation effectiveness, filter condition, duct cleanliness, temperature/humidity control, and outdoor air delivery. Recommendations for system improvements and maintenance.
VOC & Chemical Testing
Measurement of volatile organic compounds from building materials, furnishings, cleaning products, and personal care items. Formaldehyde testing, total VOC screening, and compound-specific analysis supporting green building certification and healthy material selection.
Remediation & Verification
Development of remediation action plans with prioritized recommendations for ventilation improvements, source removal/control, filtration upgrades, moisture management, and operational changes. Post-remediation verification testing to confirm effectiveness.
Benefits of Professional IAQ Services
- Protect occupant health by identifying and mitigating exposure to harmful indoor air pollutants
- Improve comfort and satisfaction through optimal temperature, humidity, and ventilation control
- Enhance productivity and cognitive performance in offices and schools with better air quality
- Reduce absenteeism and healthcare costs associated with poor indoor air quality
- Support green building certification (LEED, WELL) with IAQ documentation and testing
- Resolve IAQ complaints and liability concerns through systematic investigation and remediation
- Optimize HVAC system operation reducing energy costs while maintaining healthy ventilation
- Ensure compliance with IAQ standards and building codes for new construction and renovations
Our IAQ Assessment Approach
Initial Consultation & Walk-Through
We begin with understanding your IAQ concerns, building characteristics, occupancy patterns, and project objectives. Walk-through survey documents building construction, HVAC systems, potential pollutant sources, moisture issues, and occupant activity areas. Occupant questionnaires gather symptom patterns and complaint histories.
Monitoring & Testing
Deployment of real-time continuous monitors measuring PM2.5, VOCs, CO, CO₂, temperature, humidity, and other parameters over hours to days. Collection of samples for laboratory analysis including VOC canisters, formaldehyde samplers, mold spores, radon detectors, and filter-based particulate samples. HVAC system testing including airflow measurements and ventilation rate calculations.
Source Investigation & Building Diagnostics
Systematic investigation of potential pollutant sources including inspection of HVAC equipment, ductwork, filtration systems, combustion appliances, moisture intrusion points, building materials, furnishings, and cleaning products. Thermal imaging identifies hidden moisture and insulation deficiencies. Building envelope testing quantifies air leakage and ventilation effectiveness.
Data Analysis & Health Risk Assessment
Comprehensive analysis of monitoring data, laboratory results, and building information. Comparison of pollutant concentrations against health-based guidelines (EPA, ASHRAE, WHO), building standards, and background levels. Identification of temporal patterns, pollutant sources, and contributing factors. Assessment of health implications for building occupants with consideration of vulnerable populations.
Reporting & Remediation Recommendations
Detailed report documenting findings, data, and interpretation with clear graphics and accessible language. Prioritized recommendations addressing source control (removal, encapsulation, substitution), ventilation improvements (outdoor air increase, local exhaust), air cleaning (filtration, purification), moisture management, HVAC maintenance, and operational procedures. Cost estimates, implementation timeline, and post-remediation verification plan. Follow-up support through remediation implementation and verification testing.
Create Healthier Indoor Environments
Partner with Henddu for comprehensive indoor air quality services that identify problems, protect health, and deliver practical solutions for better indoor air.
Request IAQ Assessment