10 Everyday Sources of Indoor Air Pollution That Could Affect Your Health

The air inside your home may look clean, but that does not always mean it is clean. Everyday activities such as cooking, cleaning, showering, and heating can release pollutants into the air. For families, this matters because children can spend a large part of their day indoors, where poor indoor air quality may contribute to irritation, allergies, and respiratory discomfort.

Irish homes can be particularly affected when moisture, pollutants, and stale air become trapped indoors. Improving ventilation is therefore not simply about making a room feel fresher. It can help remove pollutants, manage moisture, and create a more comfortable living environment.

Here are the 10 common sources of indoor air pollution that homeowners should know about.

Cooking can release fine particles, grease, nitrogen dioxide, and other pollutants, particularly when frying, grilling, or using a gas hob.

Without adequate extraction, these pollutants can spread from the kitchen into bedrooms, living areas, and other parts of the home.

What you can do: Use your cooker hood or extractor while cooking and allow it to run for a short period afterwards. Good ventilation can help remove airborne cooking pollutants more effectively.

Bathrooms, kitchens, utility rooms, and poorly ventilated bedrooms can accumulate moisture. Over time, persistent damp conditions can encourage mould growth.

Mould spores can become airborne and may irritate the eyes, nose, and airways, particularly for people who are sensitive to them.

Look for warning signs such as condensation, musty smells, damp patches, or recurring mould.

What you can do: Control moisture at its source and ensure humid rooms have effective extraction and continuous airflow.

Disinfectants, sprays, bleach, air fresheners, and other cleaning products can release chemicals and volatile organic compounds (VOCs) into indoor air.

Using several products in a poorly ventilated room can increase exposure.

What you can do: Follow product instructions, avoid unnecessary overuse, and ventilate rooms while cleaning. The EPA also recommends keeping homes adequately ventilated when using household chemicals.

Concerned about stale air, condensation, or indoor pollutants? Speak with our team about a ventilation solution for your home.

GET EXPERT ADVICE

Household dust can contain a mixture of particles, including dust mite debris, pollen, skin flakes, and pet dander.

For families with allergies or respiratory sensitivities, these particles can become a persistent indoor irritant, especially when dust is disturbed during cleaning or everyday activity.

What you can do: Vacuum regularly, wash bedding, clean soft furnishings, and avoid allowing dust to accumulate. Ventilation can complement cleaning by helping maintain healthier airflow.

Candles and incense may create a pleasant atmosphere, but burning them releases smoke and fine particles into the room.

Using several candles in a small or poorly ventilated space can increase the concentration of airborne particles.

What you can do: Use them sparingly and provide adequate ventilation. Never treat a pleasant fragrance as evidence that indoor air is clean.

Open fires and solid-fuel stoves can introduce pollutants into the home, particularly when fuel is burnt inefficiently or ventilation and appliances are not properly maintained.

The Irish EPA identifies solid-fuel burning as a major source of fine particulate matter and notes that burning coal, peat, and wood can also affect indoor air quality.

What you can do: Use appropriate fuels, maintain combustion appliances correctly, and ensure rooms have suitable ventilation.

Gas cookers, boilers, fires, and other combustion appliances can produce pollutants if they are poorly maintained, incorrectly installed, or inadequately ventilated.

Carbon monoxide is particularly dangerous because it is colourless and odourless. The HSE recommends appropriate ventilation, regular appliance maintenance, and carbon monoxide alarms in relevant rooms.

What you can do: Never block ventilation openings, have appliances serviced by qualified professionals, and install suitable carbon monoxide alarms.

Fresh paint, adhesives, varnishes, flooring products, and some furniture can release VOCs into indoor air.

These emissions may be more noticeable after decorating or renovating, when multiple new materials are introduced into a home at once.

What you can do: Follow manufacturer guidance, allow products to cure appropriately, and ventilate newly decorated rooms. During renovation, consider ventilation as part of the project rather than an afterthought.

Indoor air pollution does not always start indoors. Outdoor traffic pollution, pollen, and other airborne particles can enter through open windows, doors, and ventilation openings.

This creates a challenge for homeowners: you need fresh air, but simply opening a window is not always the most controlled solution.

A properly designed ventilation strategy can help provide continuous fresh-air exchange while controlling how air enters and leaves the property.

Radon is one of the most important indoor pollutants for Irish homeowners to understand. It is a naturally occurring radioactive gas that can enter buildings from the ground.

You cannot see, smell, or taste radon, so testing is the only way to know whether levels are elevated. The EPA states that radon is responsible for around 350 lung cancer cases in Ireland each year.

The Irish EPA recommends testing homes and provides guidance on reducing elevated levels, including improving indoor ventilation and, where necessary, installing radon remediation measures.

What you can do: Test your home for radon, particularly if you live in a higher-risk area, and follow professional advice if elevated levels are detected.

Looking for a better way to manage moisture and indoor air quality? Our team can help you find the right solution.

Get in touch

Cooking, showering, cleaning, and everyday life can add moisture, fumes, and pollutants to your home. Without good airflow, these can build up and make rooms feel stuffy.

This is where the benefits of proper ventilation come in:

• Removes stale and humid air
• Brings in fresh air
• Helps reduce condensation and mould
• Keeps rooms more comfortable

Opening windows can help, but it may not always provide consistent airflow. Modern home ventilation systems can continuously remove stale air and bring fresh air into your home.

If your home often feels stuffy or has condensation, improving your airflow could make a real difference to your family’s comfort and improve air circulation.

Your home should be a place where your family can breathe comfortably. From cooking fumes and cleaning chemicals to mould, combustion pollutants, and radon, everyday sources can affect indoor air quality without being obvious. Identifying these sources is the first step. The next is creating consistent, effective airflow that removes unwanted pollutants while maintaining comfort.

Ermen Systems provides ventilation solutions for Irish homes designed to support healthier indoor air, manage moisture, and improve comfort. Explore practical ventilation options suited to your property and family’s needs.