The air in New York City has been hazy, with a red sun hanging in the sky, and residents are struggling to find relief from the Canadian wildfire smoke that's been invading their lungs. While getting inside might provide some comfort, it's not always enough to protect ourselves from the harmful effects of the smoke-filled air. So, how can air conditioning (AC) units help, and what are the limitations?
AC Units: A Double-Edged Sword
The Environmental Protection Agency (EPA) recommends keeping windows and doors closed to prevent outdoor air from entering the building. Using AC units instead of opening windows is generally advised, as they recirculate indoor air, which is less likely to be contaminated with smoke. However, it's crucial to maintain these units properly.
For window AC units, regular maintenance is key. Rinsing and replacing the filters every four to six weeks is essential, as suggested by Cole Goldklang, founder of Breasy. This simple task can significantly improve air quality. Additionally, Goldklang recommends checking for any gaps between the AC unit and the window frame and sealing them with foam to prevent outdoor air from seeping in. This not only improves air quality but also helps control utility bills and reduces noise.
Central AC units, however, present a different challenge. Renters often rely on landlords to maintain these systems, which can be problematic during emergencies. William Bahnfleth, a professor at Penn State University, expresses skepticism about the readiness of central AC systems to handle wildfire smoke. Regular maintenance and filter checks are crucial for both central and window AC units to ensure optimal performance.
Limitations of AC Units
It's important to note that AC units alone cannot clean the air once it's inside. They are designed to cool and circulate air, not to filter out pollutants. For effective air purification, air purifiers or other specialized air cleaning devices are necessary. Portable AC units with single-hose vents may even draw more smoke inside, so they should be used sparingly. If you have a dual-hose unit, ensure a tight seal to the window to prevent outdoor air from entering.
Beyond AC Units
While AC units can provide some relief, it's essential to take additional measures to protect yourself. Avoid activities that produce indoor air pollutants, such as smoking, vaping, or using gas stoves. Opt for HEPA-filtered vacuums and minimize strenuous activities to reduce the risk of inhaling smoke. The EPA provides valuable resources, including a guide to choosing effective air cleaners and even a DIY option for those in a pinch.
In conclusion, while AC units can help maintain indoor air quality during periods of poor outdoor air, they are not a standalone solution. A combination of proper maintenance, sealing gaps, and using air purifiers or DIY solutions can significantly contribute to a healthier living environment in the face of wildfire smoke and other air quality concerns.
