Help! Dad just used the bathroom
It’s only human—when you use the toilet or the bathroom, you sometimes leave unpleasant odours behind. You may not notice this yourself, but the people who use the room after you may find it nauseating. That makes it important to remove odours as quickly as possible, thereby avoiding discomfort to other occupants or visitors.
The bathroom fan
Fans specifically designed for bathrooms and toilets are available to do this job. They typically measure 15 x 15 cm, and they can be installed in the wall or in the ceiling. They generally have a circular outlet at the rear to which a rigid or flexible duct can be attached.
With a wall exhaust, the outer end is finished by a cover plate with small louver vanes. The exhaust air blows the vanes open. When the fan is not running, the vanes prevent penetration by rain or wind. With a roof exhaust, a special ventilation roof tile is used.
A simple solution
The simplest option is to connect the fan in parallel with the room light. The fan runs when the light is switched on, and stops when the light is switched off. The main drawback of this option is that the odours or humidity may not be entirely removed when the occupant leaves the room.
A better solution
However, there are also fans with a built-in timer. It starts running when the light is switched on and it continues running for about two minutes after the light is switched off to remove any residual odour.
The ultimate solution
More options are available if the home has an Integrated Home System (IHS). For instance, you can choose whether or not to have the fan start running when the light is switched on. That means you can read the paper on the toilet in peace and quiet. The run-on time can also be set under software control.
For example, the fan in the bathroom can be configured to start running automatically when someone remains in the room for longer than five or ten minutes. Extended presence increases the chance that the shower or the tub will be used. Then the moist air will be removed from the room and the bathroom mirror will not fog up. Of course, you can also use a humidity sensor to control fan operation. Put an end to damp walls and unpleasant odours—your children will be grateful.