From respiratory issues and headaches to more serious conditions like asthma, the consequences of poor ventilation can be severe. Additionally, inadequate ventilation can also contribute to problems like condensation, mould growth, and uncomfortable living conditions.
With insufficient ventilation, warm air lingers in summer, which can lead to overheating and the need for more cooling. In winter, a lack of ventilation can allow cold air to enter, requiring more heating. This results in a higher energy consumption for both heating and cooling, and consequently higher energy bills.
It has been shown that houses with inadequate ventilation systems have reduced oxygen levels and this can result in sickness, nausea, mental and physical fatigue, and stress.
Effects of Poor ventilation can lead to a buildup of indoor air pollutants, triggering respiratory problems and allergies. Additionally, it hampers cognitive function, as increased carbon dioxide levels affect concentration and decision-making.
Occupants of homes with poor indoor air quality may complain of symptoms such as headache, eye irritation, fatigue, dry throat, sinus congestion, dizziness, and nausea. Because many illnesses can cause these symptoms, diagnosing sick building syndrome is difficult.
Benefits of Proper Ventilation
Balances Humidity: Excess moisture levels can lead to mold growth, insulation problems, and structural damage. It may also cause heating and air conditioning systems to work overtime, shortening their lifespans and increasing energy bills.
You can improve natural ventilation by fully or partly opening windows, air vents and doors. But do not prop fire doors open. You should be able to open any windows and keep vents or trickle vents open that let in fresh air. If any windows have been painted shut, they should be reopened.
CO2 levels that are higher than 1150 ppm will typically occur in bedrooms that are not fitted with a ventilation system and where windows and doors are closed. Above 2600 ppm: Insufficient ventilation—both sleep quality and next-day performance are adversely affected.
Homes with poor ventilation increase exposure to indoor air pollutants by increasing their concentrations and the length of exposure time. Poor ventilation within homes has been shown to be associated with increased risk of asthma exacerbations and respiratory tract infections in children [43].
So changes would be even smaller in most homes. Simply put, humans don't take in as much oxygen as we think we do. Based on oxygen alone, estimates are that the average person could survive in a completely sealed, airtight room for 12 full days! Running out of oxygen in a room is quite unlikely.
There are many indoor air monitors available on the market, including the Airthings Wave Plus and the uHoo Smart Air Monitor. Alternatively, you can buy another type of smart device that has air quality monitoring functionality, such as a tech-enabled air purifier, smart thermostat or indoor home security camera.
Visual signs: The visual signs specific to inadequate ventilation are the rate of breathing, abnormal chest wall movement, irregular breathing pattern, and abnormal work of breathing.
Partner With the Air Quality Experts
Your indoor air can be dangerous and unhealthy, especially if your living space has poor ventilation. Stale air exposes your household to allergens and irritants, leading to respiratory complications, illness and allergic reactions.
How, then, to keep your IAQ A-OK? Prevailing wisdom is that at least 5 minutes—and ideally 15 to 20 minutes—a day of ventilation significantly improves indoor air quality. For a strong ventilation, open the front and back door, along with windows on the path in between, to get the baddies out.
Mold and Mildew: Mold and mildew thrive in damp, poorly ventilated environments. Their presence, especially in bathrooms, kitchens, or basements, is a warning sign that your ventilation is insufficient. Not only does it look bad, but mold spores can significantly affect the indoor air quality and increase health risks.
Aggravating Allergies
Fans can spread dust. View Source and other allergens around the room. For people with allergies, breathing in these allergens can impact the quality of their sleep. View Source .
Cold air can cause your airways to narrow. This can increase the amount of mucus you produce and make it harder to breathe. Cold, dry air can also irritate your airways and make symptoms like wheezing, coughing and breathlessness worse.
Air purification cleans and recirculates the air that is present but does not introduce new air into the home. It is also not able to help with unhealthy gasses and finer particulates which are too small for many filters to capture.
If it's safe to do so, open doors and windows as much as you can to bring in fresh, outdoor air. While it's better to open them widely, even having a window cracked open slightly can help. If you can, open multiple doors and windows to allow more fresh air to move inside.
Sinus, hay fever and respiratory problems
For those prone to allergies, a poorly ventilated building will be your worst nightmare. You will notice the frequency and intensity of their symptoms increase – even a small amount of dust can cause a big reaction.
Time is very important when an unconscious person is not breathing. Permanent brain damage begins after only 4 minutes without oxygen, and death can occur as soon as 4 to 6 minutes later. Machines called automated external defibrillators (AEDs) can be found in many public places, and are available for home use.
With poor ventilation in house, the hot air concentrated at your attic's highest points stays trapped. This, in turn, can lead to uneven roof temperatures (ice dams), an overtaxed HVAC (higher energy bills), and other costly headaches.