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What Causes Condensation?

Through the daily routine of showers, baths, boiling kettles, cooking, drying clothes and breathing a family of 4 will contribute approximately 4 pints of water per person a day, equal to over 100 pints of water vapour a week, which has to end up somewhere.

Condensation On Window Caused By Excess Moisture

When warm, moist air comes into contact with either a surface or air that is colder than it is, the warm air is unable to retain the same amount of moisture as it did and the water is released either into the cold air or onto the colder surface, causing condensation to form.

Before the days of double glazing, wall and loft insulation this humid, stale air would find its escape route through ill-fitting windows and doors, lofts and so on. It would be replaced by fresher, colder air or to you and me - a draught.

Airtight Property Causing Condensation On Windows

Three Important Factors That Cause Condensation:

  1. The level of moisture in the air.
  2. The temperature of the air in your home.
  3. The surface temperature of the windows.

The more moisture in the air the more likely it is that you will get condensation.

Today, after the introduction of energy saving measures such as draught proofing, double glazing and cavity wall insulation there is no natural escape route for this stale, humid air, which is now trapped inside the home.

As a result, this trapped and stale air only makes the problem worse, causing condensation on windows, walls and poor indoor air quality.

Streaming Windows In Morning

Causes of Condensation

Improperly fitted washing machine - From just one load of washing two litres of water is emitted into the air. 

A flued gas heater - which has a flue or chimney to carry the combustion pollutants and water vapour to the air outside the home. An unflued gas heater has no flue and releases the combustion pollutants and water vapour directly into the room. Burning gas always produces water vapour. If there is not enough fresh air circulating in the room, water vapour can cause high humidity and wet surfaces.

Kitchens and Bathrooms - produce a lot of steam and moisture so always ensure you have extractor fans on, use pan lids when cooking, put bath mats down and keep doors closed. 

EnviroVent has a ventilation system for every kind of home, whether it be the smallest apartment, bungalow, house or a major building project. With a wide range of energy efficient and innovative ventilation systems, you can be assured that your indoor air quality will be dramatically improved, whilst having a positive effect on your health and your home.

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