The three main factors governing condensation are:
- Water vapour content of the air.
- Inside room temperature.
- Outside temperature.
The first two factors are normally controllable.
1. Water vapour content of the air
This is produced by normal living activities such as washing, cooking, bathing, etc., and can be controlled by the use of extractor fans, cowlings, and ventilation at appropriate places.
2. Inside room temperature
This can be controlled by replacing single glazing with double or triple glazing, or by slightly increasing the temperature of your central heating. The increase in air temperature enables it to hold more water vapour without condensing.
3. Outside temperature
This cannot be controlled, but it can be countered when it falls by increasing the indoor heating.