Updated July 16, 2026

Wildfire smoke is affecting outdoor air quality throughout Milwaukee and southeastern Wisconsin. The National Weather Service reported that smoke from fires across northern Minnesota and northwestern Ontario contributed to very unhealthy or hazardous air quality in parts of the region, with conditions expected to fluctuate as winds change.

Even when you stay inside, some outdoor smoke and fine particles can enter your home through open windows, doors, ventilation systems and small gaps in the building. Fortunately, there are steps you can take to reduce exposure and improve your indoor air quality.

What Should You Do When Air Quality Is Poor?

During periods of wildfire smoke or elevated air pollution, the Wisconsin Department of Natural Resources recommends limiting the amount of outdoor air entering your home and taking steps to keep your indoor air cleaner.

Keep Windows and Doors Closed

Keep windows and exterior doors closed as much as possible. Although opening the windows may normally help freshen your home, it can allow smoke and fine particles to enter when outdoor air quality is poor.

Run Your Air Conditioner on Recirculate

When possible, set your HVAC system to recirculate indoor air rather than bringing in additional outdoor air. Make sure the system is operating properly and that the air filter is correctly installed.

Check Your HVAC Filter

A dirty or clogged filter may restrict airflow and reduce your HVAC system’s performance. Inspect your filter and replace it when needed according to the equipment and filter manufacturer’s recommendations.

AirNow recommends using a high-efficiency filter rated MERV 13 or higher when an HVAC system can safely accommodate it. Not every furnace or air handler is designed for the same filter, however. Installing a filter that is too restrictive may reduce airflow and place unnecessary strain on the system, so speak with an HVAC professional before making a major filtration upgrade. Our Dynamic Electronic air cleaners can help keep indoor air clean without being restrictive.

Consider a Whole-Home Air Cleaner

A whole-home air cleaner works with your HVAC system to help capture airborne particles as air circulates throughout your home. Depending on the system, it may provide more consistent filtration than standard disposable filters alone. Because compatibility, airflow and installation requirements vary, an HVAC professional can help determine which option is best suited for your equipment and indoor air quality needs.

 Avoid Creating Additional Indoor Pollution

While outdoor air quality is poor, try to avoid activities that add particles to the air inside your home. This can include burning candles or incense, smoking, using aerosol products and operating wood-burning fireplaces. AirNow also recommends limiting activities such as frying food or vacuuming when smoke levels are elevated.

How Can Your HVAC System Help?

Your heating and cooling system can play an important role in circulating and filtering indoor air, but its effectiveness depends on the equipment, filter, airflow and condition of the system.

An HVAC professional can help by:

• Inspecting your current filter and filtration setup
• Determining which filter ratings are compatible with your equipment
• Reviewing system airflow and operating settings
• Evaluating whole-home air filtration or air-cleaning products
• Identifying HVAC maintenance issues that may affect indoor comfort or air circulation
• Recommending indoor air quality solutions based on your home and existing system

No single product can completely prevent outdoor smoke from entering a home. However, proper filtration, system maintenance and indoor air quality equipment can help reduce airborne particles and improve the quality of the air circulating throughout your home.

Monitor Local Air Quality Conditions

Air quality can change quickly as weather patterns and wind directions shift. Homeowners can monitor current conditions using the Wisconsin DNR Air Quality Map or the EPA’s AirNow Fire and Smoke Map. These resources provide current Air Quality Index information and updates about smoke conditions.

People who are especially sensitive to smoke should follow guidance from local health officials and consult a healthcare professional with questions about symptoms or individual health concerns.

Roman Home Services Is Ready to Help

Poor outdoor air quality is a reminder that the air inside your home matters, too. The HVAC professionals at Roman Home Services can inspect your system, review your filtration and help you explore indoor air quality solutions that are appropriate for your home.

Poor air outside? Let us help improve the air inside.

Schedule Indoor Air Quality Service

Contact Roman Home Services today to schedule an HVAC or indoor air quality evaluation for your southeastern Wisconsin home.