What is condensation ?

Condensation is water. Two thirds of the world’s surface is water; 100% of our little island is surrounded by water. There is no magic in it. During the cooler months of the year just take a walk around your neighbourhood and have a look at all those closed up windows with water streaming down them on the inside. Is your home one of these? This leaflet was produced to make us aware of condensation and its effects. The most obvious effect of condensation is to make the house look, feel and seem damp. Many people believe that the problems they see are the result of damp coming through walls. They think that it is impossible for condensation to look so bad or create such a mess. However, if there is water coming through the wall, the problem will be localised and will normally have a "tide mark" around it and effects are rarely as bad as those caused by condensation. The solution in this case is to repair the leak.


So if my house doesn’t leak where does all this water come from?

Water is always present in the air that we breathe and every time we ex-hale a small amount of vapour is released back into the atmosphere. The typical adult, without any great exertion, will give off almost 4 pints of water a day. This is even more noticeable on a camping holiday in a tent or caravan in the mornings when windows will be steamed up. Exactly the same happens in the home, although on a lesser scale, mainly because we are not in such a confined space; but it still will occur. Add this to all of the normal activities such as cooking, boiling kettles, showering etc. and home appliances such as bottled gas heaters and un-vented tumble dryers and the average family will produce somewhere in the region of 2 gallons of water each day which may not escape. In the modern home the fitting of plastic windows and doors, draught proofing, and sealing up air bricks in the constant endeavour to reduce fuel consumption seals in the moisture. Also gone are the days in which you could leave a window open without the fear of being burglarised. The air within the building therefore becomes stagnant, as well as being full of water it will also contain smoke, dust, pollen and foul smells.


Where will condensation appear ?


Condensation will appear in unlikely places. Sometimes wardrobes which are next to the outside wall become damp inside, perhaps mould will form; toilet cisterns and water pipes will start to drip water even though there are no leaks. Clothes may never dry properly, blankets and bed linen always seem cold and can smell musty and damp. But the most obvious signs are damp walls or water running down the inside of windows. How does condensation affect me ? A lesser known effect of a high moisture content in the air is discomfort. Firstly, our bodies are better at medium levels of humidity. Secondly, damp walls let out more heat than dry ones so making your heating system less efficient and therefore more costly. Finally, under these circumstances the levels of micro-organisms living in our homes may be higher since they prefer damp rather than dry conditions. This may increase the frequency of respiratory attacks such as asthma or hay fever which can be triggered by creatures such as dust mites. In all the effects are costly, depressing, harmful and uncomfortable.

How do the units work?

The positive pressure  loft mounted unit draws fresh air into the dwelling from outside and filters it before being delivered into the property. Moisture-laden air is diluted, displaced and replaced with clean, tempered and filtered air. This eliminates or reduces surface condensation, which causes mould growth, providing a significant improvement in the health of asthma sufferers and general indoor air quality.

How large a dwelling will your units cover?

One unit will work efficiently in houses up to approximately 2,500 square feet. Although this is not strictly limited.


How much does the unit cost to run?

As a background ventilation unit alone it will cost about a penny a day to run due to it's low voltage D.C. motor. However units installed with the automatic auxillary heater will cost more whilst the heating element is in use.