Now that the winter months are all but here many of us will notice an increase in condensation forming on windows, even on walls and possibly clothing and furniture. This is all due to something known as the Dewpoint. Without going into great detail this is the point where a body of air cannot retain the amount of moisture within it. When the air contains more moisture than it can hold, it reaches 'saturation point' and when this is reached, the moisture turns back into water and condensation occurs. The temperature reached saturation point is called the 'dew point'. Windows even double glazed are cold enough for condensation to form on the glass and even the frames inc double glazed PVCU windows. Toilet cisterns containing cold water attracted water molecules to condense on them causing drips and in some cases, people think their cistern has a leak. In severe cases, walls will attract this moisture and mould growth often follows. Furnishing can also suffer from mould growth along with clothing esp leather goods which appear to be ideal breeding grounds for the mould growth. So what can be done to combat condensation in our homes? Well in less severe cases the correct use of heating and adequate ventilation can help sliding glass covers will reduce evaporation on our tanks, however, these measures alone are often not enough especially with the amount of evaporation from our tanks. Some will use extractor fans and dehumidifiers but they have many disadvantages even heat recovery units can prove very expensive and well out of many peoples budgets. There is a better answer out there than all the above mentioned. I am a retired local government building projects manager and have a great deal of experience dealing with condensation problems in domestic property inc finding the cause and implementing condensation eradication schemes. Agian, without going into detail I have been involved with advice, decoration, insulation, ventilation and mechanical removal of condensation. Around 12 years ago I trailed something call positive ventilation PIV or a low-energy Positive Input Ventilation system. I used 2 companies and 5 units from each company were instaled in various age, build type and construction of public sector properties all of which had varying degrees of condensation. The results of the studies taken through the winter months (the time when condensation problems are at their worse) were quite remarkable. The tenants of the properties all completed an extensive before and after questionnaire and all either reported a large reduction in condensation or complete elimination of the problem. Apart from the positive effects experienced in the properties, all reported an improvement in the air within their homes. If anybody would like any further information just as same goes for any questions.