HEPA, PM2.5, and Cardiometabolic Health

This study is investigating whether using HEPA air purifiers in the home can improve cardiometabolic health (heart health, blood sugar regulation, and related markers) in older adults in Los Angeles who are exposed to fine particle air pollution (PM2.5). Fine particulate matter from traffic and other sources has been linked to heart disease, and reducing indoor exposure may have measurable health benefits. You may be eligible if: - You are between 65 and 84 years old - You have not smoked for at least 1 year - You have a history of BMI of 25 or higher - You speak English or Spanish - You live in Los Angeles County You may NOT be eligible if: - You have diabetes (type 1 or type 2) or a degenerative brain disease such as Alzheimer's or dementia - You are currently receiving active cancer treatment - You already have HEPA filters in your home - You plan to move out of your home within 2 years, or will be away for more than one month - You have a high finger-stick blood glucose reading above 200 mg/dL Talk to your doctor to see if this trial is right for you.