Aerating your home is essential if you do not want moisture to build up inside - something which can cause unwanted mould and spores to spread. The simplest way of doing this, of course, is to open your windows. Given that nearly all windows open outwards this should not be a problem if your windows overlook your own property.
However, it is not always possible to open your windows outwards to create airflow. Perhaps your windows open onto the street outside, for example? There again, they might overhang a neighbouring property if you were to open them. What can you do to overcome this problem?
Bear in mind that although commonplace, windows do not need to be made to open outwards all the time. A sliding window supplier can make fenestration units for you which will allow air to come into your home but which do not need to swing outwards on a conventional hinge. Sliding windows are manufactured in a similar fashion to patio doors, only smaller. You simply slide them left and right on a runner. The other, vertical type - which is popular in Europe - is called a sash window. These slide up and down and can be opened fully or partially, depending on your preference, locking into place under friction that so they don't fall down.
Louvred glazing is a good option if you have no room outside of your property to open your windows but you still want air to flow in. Instead of having a single pane of glass, a louvred window will have several slats made from glazing which, when pushed into a vertical position, create a weather-tight seal. However, when you rotate them towards the horizontal, they allow air to flow into your home. This sort of option is good if you don't want to open your windows because you worry about security. Louvred windows allow for plenty of air to flow, but they prevent unwarranted access into your home, too.
Window Air Vents
If neither louvred windows nor sliding windows are practical in your home, then you can always fit an air vent into your current windows. Although they don't allow for the same level of aeration as opening your windows, they are a good, pragmatic alternative. Fitting one usually involves carefully cutting out a circle of glass from your window and installing a fan-like vent which allows air into your property from the outside.