All homes will need ventilation accessories, it is not only required by building law but it makes for living in your home a lot more comfortable. However, all homes will require their own styles and functions. Living in the Greater Vancouver area of British Columbia is a lot different than living in Phoenix, Arizona. What your home requires in Vancouver will not be the same as the requirements of Phoenix.
That being said, there are many ventilation accessories available, some of which will be highlighted here. These can include several different areas of your home. If you have a basement, it will need a vent. If you have a ground floor, it will need vents. And if you have an attic, it will also need to be properly ventilated.