Vent Axia How to Control Condensation

The problems that condensation can cause

The British Isles has a naturally humid environment. A humidity map will show the regions that are regularly at, or in excess, of 70% RH. An estimated 4.5 million British homes suffer from the damaging effects of condensation.

Therefore we need to take extra measures in the UK to prevent the expensive consequences of condensation such as rotting window frames, peeling wallpaper, mould growth, damp and eventually, rotting of the building fabric itself.

Condensation is aggravated by a reduction in natural ventilation. This is common in today's sealed and insulated buildings which incorporate replacement windows, draught proofing and fitted carpets, etc.

If moist air is unable to escape, it will condense on cooler surfaces and migrate to colder parts of the dwelling. Problems often start in the kitchen or bathroom, where cooking, washing, drying clothes, showers and bathing generate excess moisture.

Not only does moist air cause problems to the fabric of the building but also to air quality and health. People who suffer from asthma or any other bronchial problems can have their condition aggravated by a moist environment.

The microscopic droppings of the house dust mite can cause asthma, rhinitis, bronchial and other allergic problems. Constant wholehouse ventilation can reduce the relative humidity to below 70%, which inhibits the ideal living and breeding conditions of the house dust mite.

How to Control Condensation

The results of condensation in a building can be reduced by a combination of measures: heating, correct insulation and properly sited ventilation. However, controlled mechanical ventilation removes moisture-laden air at source before it can condense, creating background level ventilation throughout the dwelling.

The Building Regulations for the United Kingdom require mechanical ventilation in all moisture-generating areas to remove humid air and odours from shower rooms, bathrooms, toilets, kitchens and utility rooms.

The regulations are to ensure that humidity is removed at source before it is able to migrate causing damage to colder parts of the dwelling. Vent-Axia manufacture a range of domestic fans for kitchens, utility rooms, bathrooms, toilets and shower rooms designed to meet the Building Regulations and help keep condensation under control.