Common Sources of Indoor Air Pollution in Wisconsin Homes and How to Fix Them

You might be breathing more than just air.

In Southeastern Wisconsin, we spend a big part of the year indoors. With long, cold winters, we seal our homes tightly to stay warm and save energy. But that same insulation can also trap harmful particles inside. According to the EPA, indoor air can be two to five times more polluted than outdoor air.

Whether you live in a modern home in Franklin or a classic ranch in West Allis, indoor air pollution is a serious concern for both your comfort and your health. The good news is that your HVAC system can help clean the air you breathe. Here is what you need to know.

What Is Indoor Air Pollution?

Indoor air pollution happens when contaminants build up in your home. These pollutants can come from things you do every day, like cooking, cleaning, or spending time with your pets.

In Wisconsin homes, the problem can be made worse by poor ventilation, especially in older houses. During winter, when we keep windows closed and furnaces running, polluted air has nowhere to go. That stale air lingers and affects your health and comfort.

Top Indoor Air Pollutants in Wisconsin Homes

Here are the most common sources of indoor air pollution found in Southeastern Wisconsin homes.

Pet Dander and Hair

Dogs and cats are part of the family, but they shed skin flakes and hair that can float through the air and collect in your ductwork. In winter, when homes are sealed up, dander builds up quickly.

Dust and Dust Mites

Dust mites thrive in warm places like carpets, bedding, and upholstered furniture. Homes with forced-air heating systems can spread dust through vents, making things worse for allergy sufferers.

Mold and Mildew

High humidity and low airflow create the perfect environment for mold. Bathrooms, basements, and window areas are common trouble spots. Mold can trigger asthma and other respiratory issues.

Volatile Organic Compounds (VOCs)

VOCs are chemicals released into the air from everyday items like paint, cleaning products, air fresheners, and even new furniture. Long-term exposure to VOCs can cause headaches and other health problems.

Smoke and Cooking Byproducts

Cooking on gas stoves, burning candles, and using fireplaces all release pollutants. Without proper ventilation, these particles stay in your air.

Radon

Radon is a radioactive gas that seeps into homes from the ground. It is common in Southeastern Wisconsin, especially in basements and older homes. You cannot see or smell it, but it can pose serious health risks over time.

Not sure what is in your air? Ask Midwest Heating and Cooling for a home air quality assessment.

How to Reduce Indoor Air Pollution in Your Home

Improving your home’s air quality is easier than you might think. Here are some simple but effective steps:

Improve Ventilation

Use exhaust fans in the kitchen and bathroom. When the weather allows, open a few windows. For better results year-round, consider a mechanical ventilation system like an ERV or HRV.

Regular HVAC Maintenance

Change your air filters regularly, clean your ducts, and schedule seasonal HVAC tune-ups. A well-maintained system does a better job filtering air and removing pollutants.

Install Air Purifiers or Whole-Home Solutions

Air purifiers with HEPA filters, UV lights, or Midwest-installed air scrubbers can trap dust, allergens, and germs before they circulate in your home.

Control Humidity

Keep your humidity between 30 and 50 percent. Dehumidifiers are great in the summer, while humidifiers can help in the dry winter months.

Choose Low-VOC Products

Buy paints, cleaners, and home goods that are labeled low-VOC or VOC-free. These options release fewer harmful chemicals into the air.

Why Indoor Air Quality Matters More in Southeastern Wisconsin

Our local climate makes air quality a bigger challenge. We keep our homes tightly sealed during the heating season, which traps pollutants inside. Add in an older housing stock, and you have the perfect recipe for poor indoor air quality.

That is why it is so important to think about air quality all year long, not just during allergy season or when something smells off.

Breathe Easier with Help from Midwest

Clean indoor air is about more than just comfort. It can help prevent long-term health issues and improve your family’s day-to-day life. Midwest Heating and Cooling offers expert services to help purify your home’s air, from advanced filtration systems to routine HVAC maintenance.

Talk to a local expert who understands Wisconsin’s air challenges. Let’s make your home a healthier place to live.

Frequently Asked Questions About Indoor Air Pollution

How do I know if I have indoor air pollution?

Common signs include frequent allergies, lingering odors, stale air, or visible dust buildup around vents. If your home feels stuffy or your family experiences more coughing or sneezing indoors, it could be a sign.

Can indoor air pollution cause serious health issues?

Yes. Long-term exposure can lead to respiratory diseases, asthma, headaches, and even more serious conditions, depending on the type of pollutant.

What are the best filters for improving indoor air quality?

High-efficiency filters such as HEPA filters trap the smallest particles. Midwest Heating and Cooling can recommend the best filter type for your system and lifestyle.

How often should I replace my HVAC filter?

Most homes should change their filter every one to three months. If you have pets or allergies, monthly changes may be better.

Is a portable air purifier enough for my home?

Portable purifiers can help in small spaces. For whole-home air purification, it is better to install a system that integrates with your HVAC.

What is the ideal indoor humidity level?

Aim for 30 to 50 percent. Too much humidity encourages mold growth. Too little can cause dry skin and respiratory discomfort.

Does cleaning my ducts really help with air quality?

Yes, especially if your ducts are clogged with dust, pet hair, or mold. Duct cleaning can reduce allergens and improve airflow.

Can Midwest Heating and Cooling test my air quality?

Absolutely. We offer indoor air quality assessments and can help you choose the right solution based on your needs.