You may want to consider some of both the ionization and photovoltaic type throughout your house as they detect different types of fires. The Ionization detectors will detect a fast burning fire while the photovoltaic type is better suited to detect a slow burning smoldering type fires. I have 12 located throughout my house.
Five of each type and 2 combination smoke and carbon monoxide detectors. The CO detectors are located one in the basement near the furnace and one at the top of the stairs.
You should always have one in each bedroom and one just outside the bedroom.
The combo 9V & 110V types are the best as they use a 12/3 romex between them and work as a network. In essence giving you a whole house alarm system similar to commercial systems. When one goes off they all go off. I use the BRK brand as it uses a latching relay to indicated which detector went off after you silence the system. Probably more info than you were looking for. Very good product.
Linkie here.
I have never heard of a type that uses a fan in residential applications. Personally I would stick with a type that has a proven track record in residential application such as BRK or First Alert. Just MHO.