ABSTRACT
The provision of adequate and appropriate levels of ventilation is primarily important for reasons of the health and comfort of the occupants of a house. However, because ventilation also allows warm air to leave the house, and colder air to enter it, attention needs to be paid to how that ventilation (i.e. changes in the volume of air) takes place, and the extent to which it can be controlled in order to reduce heat losses. The ability of the occupiers to control ventilation so that it provides a level of air change which is effective, yet allows the occupier to feel comfortable, is an important consideration.
