Why is ventilation so important?

Our homes are becoming better insulated, which is obviously good news for energy consumption, which is steadily decreasing. However, these well-insulated homes also bring a risk: a possible shortage of ventilation. In this article, we will explain why ventilating your home is essential.

Why is ventilating your home important?

More and more contractors are providing central ventilation systems in new-build homes yet this is not always done for every room. An example: basements are often a forgotten place when it comes to ventilation. The result: an increase in humidity and an increased risk of condensation (which in turn can cause mould).

Moral of the story: ventilation is important to moisture problems help prevent heat loss. In this article, we explain why ventilation can make a huge difference and which ventilation systems you can all have installed - without heat loss.

Four good reasons to ventilate your home

Were you looking for a reason why ventilation is important? We give you four key reasons.

Why you need to ventilate

1. Good air quality

Of course, the most obvious benefit of proper ventilation in the home is high air quality. When air circulates effectively, it automatically optimises the air quality in the home, which is essential for a healthy indoor environment. This prevents the accumulation of too much CO2, which can otherwise lead to symptoms such as headaches, drowsiness and fatigue.

It is highly recommended to ventilate regularly, especially at venues where many people congregate, to ensure a healthy and fresh living environment.

2. Drainage against moisture problems

An average person produces about 10 litres of water vapour in a day that increases humidity. This is not little, especially if you share the house with several people! This includes all human and non-human activities such as breathing, showering, washing or cooking. Without proper ventilation, that moisture can do nothing but to condense against cold surfaces such as walls or windows. Over time, this can lead to moisture problems such as mould and wetness in the house, with all its consequences.

The ventilating your home is usually the only method to effectively remove these amounts of moisture from a home. Especially in new homes, which in most cases are well insulated and airtight, well-designed ventilation is crucial to prevent moisture problems with condensation and mould. In other words, controlled ventilation must to keep the air clean and healthy.

3. No more musty smell

It is common knowledge that damp, non-ventilated rooms can smell very musty. This is, of course, a normal consequence of the lack of air circulation. In non-ventilated rooms, everything smells less fresh than in ventilated rooms.

4. Allergic? Then ventilation is definitely a must

Those with allergies like hay fever or have asthma, know well that fresh air is extremely important. Poor air quality can exacerbate asthma and some allergies, as well as cause additional complaints such as headaches or fatigue.

What happens if you do not ventilate your home (sufficiently)?

Several air quality problems can arise in homes where there is little or no ventilation:

  • Recently installed building boards, building materials and adhesives can release volatile organic compounds (VOCs) into indoor air (source: Vision on Technology - VITO).
  • Damp air can lead to condensation against cold surfaces (windows, walls). Condensation moisture can further cause mould and it affects painting and plastering.
  • In a non-ventilated house with high insulation, the air pressure inside is almost never the same as outside. This also allows the indoor air to either too dry or too humid become, depending on temperature differences.
  • In homes where ventilation is inadequate, it can be challenging to achieve and maintain a comfortable temperature. This affects your energy bills.
  • Finally, an inadequately ventilated home also has a negative impact on the health. Common consequences are:
    • Increased risks of respiratory diseases such as asthma and allergies,
    • Developing respiratory problems
    • Possible adverse effects on the immune system.
    • You may also notice an impact on your sleep and mood, leading to a lack of energy and concentration.

So how can you adequately ventilate your home?

Some tips

You can do all sorts of things to properly ventilate your home. We list some of them:

  • Open your windows regularly. We recommend doing this for about 15 minutes every day, even in winter.
  • Preferably cook with lids and dry your laundry outside as much as possible.
  • Also, always turn on your cooker hood while cooking.

The ultimate tip: a mechanical ventilation system

A good ventilation system helps control the humidity and air pressure in your home automatically. It uses pressure differences and ensures regular ventilation without heat loss:

  • The Belgian ventilation standard for passive houses gives as a guide number an n50 value of 1 if you opt for ventilation system D with heat recovery. This is a system with mechanical supply and return. Specifically, it allows the air in the house to be changed once per hour at a pressure difference of 50 Pa (Pascal) between inside and outside.
  • Do you work with ventilation system C, where there is a natural supply through window grilles and a mechanical exhaust, the standard prescribes an n50 value of 3. So here you have three air changes per hour.

Mechanical ventilation

If you have ventilation system C, airtightness is very important for good air circulation. With ventilation system D, airtightness is mainly important for heat recovery efficiency.

Suffering from moisture in your home?

Are you suffering from a condensation damp somewhere in Flanders? Or are you facing another moisture problem? Contact Aquaconsult now and our experts will be happy to help you.

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