THE EVIDENCE BEHIND THE ADVICE
Understand what the research says about indoor air, moisture, health, and HVAC care. Every finding comes with its source and the context you need.
These are findings from published research and technical guidance. Individual home results depend on the conditions, the investigation, and any work performed.
Sources checked September 24, 2026 · Educational draft · Clinical review pending for health content.
Everyday exposure
Agency exposure summary
Americans, across indoor settings
Historical exposure research cited by EPA
EPA estimates that Americans spend about 90% of their time inside buildings.
Keep the context. This includes homes, workplaces, schools, and other buildings. It is not a measure of time at home alone.
For your home. Pay attention to the places where you spend your day, including your home.
Agency exposure summary
Indoor versus outdoor concentrations of some pollutants
Historical exposure research cited by EPA
EPA reports that concentrations of some pollutants are often 2 to 5 times higher indoors than outdoors.
Keep the context. The comparison applies to certain pollutants. It is not an overall air-quality score or a finding about your home.
For your home. Investigate sources, ventilation, and filtration instead of assuming indoor air is clean.
National survey analysis
NHANES participants, dust from nearly 7,000 U.S. bedrooms, eight allergens tested
2005–2006 data · published 2018
At least one allergen was detectable for more than 99% of participants. At least one was classified as elevated for 72.9%.
Keep the context. “Elevated” used study percentile cutoffs, not a universal danger level. Dust measurements do not establish airborne dose, allergy, or illness.
For your home. Look at relevant sources and personal sensitivities. A general particle monitor cannot identify a specific allergen.
Moisture & equipment
Agency prevention guidance
Indoor spaces
EPA guidance checked September 2026
EPA recommends keeping indoor relative humidity below 60%, ideally between 30% and 50% where possible.
Keep the context. These are moisture-control guidelines. A reading within the range does not rule out a leak, damp material, or condensation on a cold surface.
For your home. Review persistent humidity changes with moisture sources and HVAC operation.
Agency prevention guidance
Materials made wet or damp by a leak or spill
EPA guidance checked September 2026
EPA advises acting quickly and drying wet or damp materials within 24 to 48 hours to help prevent mold growth.
Keep the context. Start promptly. This is not a safe waiting period or a guarantee that mold will not develop.
For your home. Address the water source and arrange appropriate drying. Do not wait for a monitoring baseline.
Equipment maintenance guidance
Residential heating and cooling equipment
ENERGY STAR guidance checked September 2026
Dirty coils can reduce cooling, increase runtime and energy costs, and shorten equipment life. A blocked condensate drain can cause water damage and affect indoor humidity.
Keep the context. These are equipment conditions that need inspection. A room particle or humidity reading cannot identify a failed component.
For your home. Check coils, filter condition, drainage, and airflow as part of HVAC care.
Physical example in technician training manual
Illustrative air and surface conditions
Mainstream Engineering · eighth edition, January 2016 · PDF page 49
At 80°F and 50% relative humidity, the dew point is approximately 60°F. Surfaces colder than that can collect condensation.
Keep the context. This is a physical example, not a mold detection threshold or a recommended thermostat setting.
For your home. Look at cold surfaces and insulation as well as the room humidity reading.
Scaringe · Indoor Air Quality and Mold Remediation Service Techniques, p. 49
Health research
National health statistics
U.S. adults age 18+ and children under 18
2024 estimates
CDC reports current asthma in 8.6% of U.S. adults and 6.5% of children for 2024.
Keep the context. These figures describe asthma prevalence. They do not show how many cases were caused by home air.
For your home. Discuss symptoms with a clinician and investigate relevant indoor triggers alongside medical care.
Meta-analysis of observational studies
11 cohort studies and 21 case-control studies of childhood asthma
Published online 2024 · journal issue 2025
The pooled odds ratio was 1.15 in cohort studies (95% CI 1.01–1.31) and 1.53 in case-control studies (1.42–1.65).
Keep the context. The cohort results varied substantially. Odds ratios are not an individual child’s probability of asthma, and these observations do not diagnose a cause.
For your home. Take moisture and visible mold seriously while a clinician evaluates health concerns.
Randomized controlled trial
937 children ages 5–11 with allergic asthma in seven U.S. cities
Published 2004 · one-year intervention
Children receiving tailored education and home allergen and tobacco-smoke remediation averaged 3.39 symptom days per two weeks, compared with 4.20 in the control group during the intervention year.
Keep the context. The difference was 0.81 symptom days per two weeks. This tested a comprehensive program, not a monitor, and does not establish an Aeritas result.
For your home. Connect identified exposures with appropriate action and follow-up, alongside asthma care.
Randomized controlled trial
116 former smokers with moderate-to-severe COPD, active HEPA/carbon air cleaners versus sham units
Online 2021 · journal issue 2022 · six months
The trial found no statistically significant difference in its primary overall respiratory quality-of-life outcome. Some secondary symptom measures improved. The moderate-exacerbation rate ratio was 0.32 (95% CI 0.12–0.91).
Keep the context. Report the primary result alongside the secondary findings. Results apply to this population and intervention, not all filters or Aeritas monitoring.
For your home. Choose equipment for a documented need and evaluate its results without promising a medical outcome.
Measurements & action
Agency monitor guidance
Low-cost indoor air monitors
EPA guidance checked September 2026
Low-cost monitors measure selected pollutants or environmental conditions. They do not give a complete assessment of indoor air quality.
Keep the context. A room reading cannot establish that a home is free of every hazard, identify every pollutant, or diagnose illness.
For your home. Confirm supported sensors and placement, then interpret trends alongside inspection findings.
EPA · Low-Cost Air Pollution Monitors and Indoor Air Quality
Agency air-cleaning guidance
Homes and indoor pollutant sources
EPA guidance checked September 2026
EPA prioritizes reducing pollutant sources and ventilating with clean outdoor air. Filtration can supplement those measures.
Keep the context. A filter does not remove every pollutant or correct a moisture source. Suitability depends on the home, equipment, and conditions outdoors.
For your home. Ask what a proposed solution addresses and how the result will be checked.
Agency national estimate
U.S. homes
EPA national estimate, checked September 2026
EPA estimates that nearly one in 15 U.S. homes has an elevated radon level.
Keep the context. This is a national estimate, not a Jacksonville rate or a result for your home. Radon requires a radon-specific test or sensor.
For your home. Ask what is included in an assessment. Do not assume a general air monitor measures radon.
HOW WE USE EVIDENCE
We keep the study population and date beside each finding. An association, a patient survey, a laboratory test, and a controlled trial answer different questions.
These sources do not establish Aeritas medical outcomes or predict equipment failure. Our home stories document observations, actions, and follow-up separately.
For persistent symptoms, speak with a healthcare professional. An environmental assessment investigates the home and does not diagnose illness.
View the structured source recordTell us what you’re noticing. We’ll help you choose an air assessment, HVAC visit, or monitoring conversation.