Independent directory Public ClinicalTrials.gov records United States
Clinical Trials Finder
Objective public record navigation
Search Results

Search by objective public record fields.

Search by query text, NCT ID, condition, intervention, sponsor, city, state, recruitment status, phase, study type, healthy volunteer eligibility, sex, or age. Results are retrieved from ClinicalTrials.gov and synchronized into the directory. Search pages remain noindex by default.

Clear filters
ClinicalTrials.gov public records Last synced Sep 1, 2026, 8:58 PM EDT

Data is sourced from official ClinicalTrials.gov public API records. Always review the official ClinicalTrials.gov record for the latest information.

Showing 1–24 of 25 matching trials from the live ClinicalTrials.gov search.
Local D1 index available.
Filters: Intervention: control air filter Clear all
Completed Not applicable Interventional

Indoor Air Quality and Respiratory Symptoms in Former Smokers

NCT02956213
View directory record Official record
Conditions
Chronic Obstructive Pulmonary Disease
Interventions
HEPA portable air filter, Sham Control/Active Comparator
Other
Lead sponsor
Intermountain Health Care, Inc.
Other
Eligibility
40 Years and older
Enrollment
52 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2016 – 2019
U.S. locations
1
States / cities
Salt Lake City, Utah
Source: ClinicalTrials.gov public record
Updated Jun 12, 2019 · Synced Sep 1, 2026, 8:58 PM EDT
Active, not recruiting Not applicable Interventional

AIRWEIGHS: Investigating Obesity as a Susceptibility Factor for Air Pollution in Childhood Asthma

NCT02763917
View directory record Official record
Conditions
Asthma
Interventions
Active Air Purifier, Placebo Air Purifier
Device
Lead sponsor
Johns Hopkins University
Other
Eligibility
8 Years to 17 Years
Enrollment
198 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2016 – 2027
U.S. locations
1
States / cities
Baltimore, Maryland
Source: ClinicalTrials.gov public record
Updated Oct 2, 2025 · Synced Sep 1, 2026, 8:58 PM EDT
Completed Not applicable Interventional

A Community-based Participatory Research (CBPR) Intervention for Childhood Asthma Using Air Filters and Air Conditioners

NCT00839046
View directory record Official record
Conditions
Childhood Asthma
Interventions
Community Health Worker Intervention, Air Filter, Air Filter and Air Conditioner
Behavioral · Other
Lead sponsor
University of Michigan
Other
Eligibility
6 Years to 12 Years
Enrollment
126 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2007 – 2010
U.S. locations
1
States / cities
Ann Arbor, Michigan
Source: ClinicalTrials.gov public record
Updated Jul 23, 2017 · Synced Sep 1, 2026, 8:58 PM EDT
Not yet recruiting Not applicable Interventional

Evaluation of a Novel Indoor Air Pollution Intervention Among Older Adults

NCT07539987
View directory record Official record
Conditions
Cardiovascular Diseases, Blood Pressure, Glycated Hemoglobin (HbA1c), Cholesterol, Cholesterol, HDL, Cholesterol, LDL, Indoor Air Quality, Particulate Matter, Health Behavior
Interventions
Air Improvement and Real-time Monitoring for Wellness through Interactive Strategies and Education (AIRWISE), Portable Air Cleaner (PAC) Control
Behavioral · Other
Lead sponsor
University of Montana
Other
Eligibility
55 Years to 79 Years
Enrollment
154 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026 – 2030
U.S. locations
1
States / cities
Missoula, Montana
Source: ClinicalTrials.gov public record
Updated Apr 19, 2026 · Synced Sep 1, 2026, 8:58 PM EDT
Completed Not applicable Interventional Results available

Residential Cleaning of Indoor Air to Protect COPD Patients

NCT03750292
View directory record Official record
Conditions
Chronic Obstructive Pulmonary Disease
Interventions
HEPAirX air filter, control air filter
Device
Lead sponsor
University of Rochester
Other
Eligibility
18 Years and older
Enrollment
9 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2021
U.S. locations
1
States / cities
Rochester, New York
Source: ClinicalTrials.gov public record
Updated May 31, 2022 · Synced Sep 1, 2026, 8:58 PM EDT
Not yet recruiting Phase 4 Interventional

The INTERvening for LUNG Health Trial

NCT07540000
View directory record Official record
Conditions
Spirometry
Interventions
Community health worker-delivered multi-component respiratory health intervention
Behavioral
Lead sponsor
Johns Hopkins University
Other
Eligibility
9 Years and older
Enrollment
800 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026 – 2030
U.S. locations
1
States / cities
Baltimore, Maryland
Source: ClinicalTrials.gov public record
Updated Aug 11, 2026 · Synced Sep 1, 2026, 8:58 PM EDT
Recruiting Not applicable Interventional

Project 4: ACHIEVE PATHFINDER

NCT06070428
View directory record Official record
Conditions
Heart Failure
Interventions
PAC provision at hospital discharge, Control non-intervention; PAC without filter
Other
Lead sponsor
Henry Ford Health System
Other
Eligibility
18 Years and older
Enrollment
400 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023 – 2027
U.S. locations
1
States / cities
Detroit, Michigan
Source: ClinicalTrials.gov public record
Updated Jul 6, 2026 · Synced Sep 1, 2026, 8:58 PM EDT
Recruiting Phase 3 Interventional

Multi-Center Clean Air Randomized Controlled Trial in COPD

NCT06376994
View directory record Official record
Conditions
Chronic Obstructive Pulmonary Disease (COPD)
Interventions
Air cleaner, Sham air cleaner
Device
Lead sponsor
JHSPH Center for Clinical Trials
Other
Eligibility
40 Years and older
Enrollment
770 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024 – 2029
U.S. locations
11
States / cities
Birmingham, Alabama • Los Angeles, California • Iowa City, Iowa + 7 more
Source: ClinicalTrials.gov public record
Updated Jul 30, 2026 · Synced Sep 1, 2026, 8:58 PM EDT
Completed Not applicable Interventional

Home Air Purification for Eosinophilic COPD

NCT04252235
View directory record Official record
Conditions
COPD, Eosinophilia
Interventions
Air purifier, Sham air purifier
Device
Lead sponsor
Beth Israel Deaconess Medical Center
Other
Eligibility
40 Years and older
Enrollment
178 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2026
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Mar 3, 2026 · Synced Sep 1, 2026, 8:58 PM EDT
Completed Not applicable Interventional

Family-Based Intervention Study of the Effects of Environmental Exposures on Breast Tissue Composition

NCT04265547
View directory record Official record
Conditions
Breast Cancer Risk
Interventions
Breast Cancer Risk Reduction Household Intervention
Behavioral
Lead sponsor
Columbia University
Other
Eligibility
10 Years to 65 Years · Female only
Enrollment
32 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Sep 22, 2025 · Synced Sep 1, 2026, 8:58 PM EDT
Not listed Not applicable Interventional

Indoor Air Quality Asthma Study: The Effect of Indoor Air Quality and Mitigation of Same on Persistent Asthma

NCT05843045
View directory record Official record
Conditions
Persistent Asthma
Interventions
Indoor Air Quality Mitigation
Device
Lead sponsor
Dayton Children's Hospital
Other
Eligibility
5 Years to 15 Years
Enrollment
10 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023 – 2026
U.S. locations
1
States / cities
Dayton, Ohio
Source: ClinicalTrials.gov public record
Updated Jan 7, 2024 · Synced Sep 1, 2026, 8:58 PM EDT
Recruiting Not applicable Interventional

The Airports, Air Quality, and Asthma (AAA) Study

NCT07047430
View directory record Official record
Conditions
Pediatric Asthma
Interventions
Portable air cleaner with HEPA filter, Less effective portable air cleaner (no HEPA)
Device
Lead sponsor
University of Washington
Other
Eligibility
6 Years to 12 Years
Enrollment
60 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024 – 2027
U.S. locations
1
States / cities
Seattle, Washington
Source: ClinicalTrials.gov public record
Updated Jul 1, 2025 · Synced Sep 1, 2026, 8:58 PM EDT
Completed Not applicable Interventional Results available

Motivational Interviewing and Air Cleaners for Smokers With COPD (MOVE COPD)

NCT03658538
View directory record Official record
Conditions
COPD, Chronic Obstructive Pulmonary Disease
Interventions
Active HEPA Air Cleaner, Motivational interviewing, Sham Air Cleaner
Device · Behavioral
Lead sponsor
Johns Hopkins University
Other
Eligibility
40 Years and older
Enrollment
144 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2024
U.S. locations
1
States / cities
Baltimore, Maryland
Source: ClinicalTrials.gov public record
Updated Sep 23, 2025 · Synced Sep 1, 2026, 8:58 PM EDT
Not listed Not applicable Interventional Accepts healthy volunteers

ASPIRE Health Tulare County

NCT05944770
View directory record Official record
Conditions
Respiratory Tract Diseases, Cardiovascular Diseases
Interventions
DIY portable air cleaner with a highly effective filter, DIY portable air cleaner with sham filtration
Other
Lead sponsor
Environmental Protection Agency (EPA)
Federal
Eligibility
18 Years and older
Enrollment
80 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023
U.S. locations
1
States / cities
Fresno, California
Source: ClinicalTrials.gov public record
Updated Oct 26, 2023 · Synced Sep 1, 2026, 8:58 PM EDT
Suspended Not applicable Interventional Accepts healthy volunteers

Efficacy of Respiratory Protection Against the Effects of Wood Smoke Exposure in Young Healthy Adults

NCT06066749
View directory record Official record
Conditions
Healthy
Interventions
Filtration of all PM and VOC's, Filtration of VOC's
Other
Lead sponsor
University of North Carolina, Chapel Hill
Other
Eligibility
18 Years to 35 Years
Enrollment
50 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2024 – 2027
U.S. locations
1
States / cities
Chapel Hill, North Carolina
Source: ClinicalTrials.gov public record
Updated Jun 11, 2025 · Synced Sep 1, 2026, 8:58 PM EDT
Completed Not applicable Interventional

Indoor Air Pollution and Children With Asthma: An Intervention Trial

NCT02258893
View directory record Official record
Conditions
Asthma
Interventions
NO2 Scrubber, HEPA filter, Control
Other
Lead sponsor
Yale University
Other
Eligibility
5 Years to 11 Years
Enrollment
116 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2016 – 2019
U.S. locations
1
States / cities
New Haven, Connecticut
Source: ClinicalTrials.gov public record
Updated Nov 22, 2020 · Synced Sep 1, 2026, 8:58 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Environmental Intervention to Reduce Allergens in Urban Schools and Childhood Asthma

NCT01913795
View directory record Official record
Conditions
Asthma
Interventions
integrated pest management, air purifier, Sham air purifier
Other
Lead sponsor
Boston Children's Hospital
Other
Eligibility
4 Years to 15 Years
Enrollment
29 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2013 – 2015
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Jun 6, 2022 · Synced Sep 1, 2026, 8:58 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

School Inner-City Asthma Intervention Study (SICAS-2)

NCT02291302
View directory record Official record
Conditions
Asthma
Interventions
integrated pest management, air purifier, No intervention (control)
Other
Lead sponsor
Boston Children's Hospital
Other
Eligibility
4 Years to 15 Years
Enrollment
236 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2015 – 2020
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Jan 6, 2025 · Synced Sep 1, 2026, 8:58 PM EDT
Recruiting Not applicable Interventional

Asthma Intervention With Residential Ventilation and Air Cleaner (AIRVAC) Study

NCT07196436
View directory record Official record
Conditions
Asthma Control, Pulmonary Function, Quality of Life, Stress, Sleep Quality
Interventions
Energy Recovery Ventilator, Portable Air Cleaner, Energy Recovery Ventilator (Sham), Portable Air Cleaner (Sham)
Device
Lead sponsor
The University of Texas at Arlington
Other
Eligibility
5 Years and older
Enrollment
80 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025 – 2028
U.S. locations
2
States / cities
Arlington, Texas • Plano, Texas
Source: ClinicalTrials.gov public record
Updated Oct 28, 2025 · Synced Sep 1, 2026, 8:58 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Reducing Traffic Pollution Exposure Improves Blood Pressure

NCT04029129
View directory record Official record
Conditions
Air Pollution
Interventions
Air filtration and building envelop modifications
Other
Lead sponsor
UConn Health
Other
Eligibility
40 Years to 75 Years
Enrollment
77 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2018
U.S. locations
1
States / cities
Farmington, Connecticut
Source: ClinicalTrials.gov public record
Updated Sep 27, 2023 · Synced Sep 1, 2026, 8:58 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

DRIIVE (Data and Research on Interventions to Improve the Vehicular Environment)

NCT02381626
View directory record Official record
Conditions
Vehicular Environment
Interventions
HEPA air purifier, questionnaires, Log-book, Urine sample
Device · Behavioral · Other
Lead sponsor
Memorial Sloan Kettering Cancer Center
Other
Eligibility
21 Years to 90 Years · Male only
Enrollment
39 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2014 – 2020
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Oct 4, 2021 · Synced Sep 1, 2026, 8:58 PM EDT
Not yet recruiting Phase 1Phase 2 Interventional

Randomized Clinical Trial of the Application of TrachPhone HME and the Impact on Patient Satisfaction for Tracheostomized Head and Neck Cancer Patients

NCT07798414
View directory record Official record
Conditions
Patient Satisfaction, Pulmonary Rehabilitation
Interventions
TrachPhone Heat Moisture Exchange, Trach Collar
Device
Lead sponsor
University of South Florida
Other
Eligibility
18 Years and older
Enrollment
80 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026 – 2028
U.S. locations
2
States / cities
Tampa, Florida
Source: ClinicalTrials.gov public record
Updated Aug 31, 2026 · Synced Sep 1, 2026, 8:58 PM EDT
Completed Not applicable Interventional

Clinical Trial of Air Cleaners to Improve Indoor Air Quality and COPD Health

NCT02236858
View directory record Official record
Conditions
Chronic Obstructive Pulmonary Disease (COPD)
Interventions
HEPA Air Cleaner, Sham HEPA Air Cleaner
Device
Lead sponsor
Johns Hopkins University
Other
Eligibility
40 Years and older
Enrollment
142 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2021
U.S. locations
1
States / cities
Baltimore, Maryland
Source: ClinicalTrials.gov public record
Updated Sep 13, 2021 · Synced Sep 1, 2026, 8:58 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Bronchiolitis Recovery and the Use of High Efficiency Particulate Air (HEPA) Filters

NCT05615870
View directory record Official record
Conditions
Bronchiolitis
Interventions
Winix 5500-2 HEPA filtration units
Other
Lead sponsor
IDeA States Pediatric Clinical Trials Network
Network
Eligibility
1 Week to 12 Months
Enrollment
230 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2024
U.S. locations
17
States / cities
Anchorage, Alaska • Little Rock, Arkansas • Honolulu, Hawaii + 14 more
Source: ClinicalTrials.gov public record
Updated Oct 1, 2025 · Synced Sep 1, 2026, 8:58 PM EDT