If you have a ventilation problem and installing a wall or ceiling ducted model is not a visible option for you, a ventilation bathroom fan is a solution to your problem. And if your bathroom or if the one in the rented apartments you live in does not currently have a ventilation fan, why do you have to face the odor and the mold that is related with all of that extra moisture from your shower? So, it fair to say no bathroom should be without any form of a fan.
(1) You do not have to give yourself a headache of drilling any holes or fitting into the walls with a ventless bathroom fan.
(2) They can be set up either on the ceiling or wall, so they require no vents.
(3) They have removable 12V motors so that they can be easily cleaned.
(4) The installation of these units is usually straightforward because they have tension spring mounting.
(5) They often weigh less than 5lbs.
Why you need ventilation bathroom fan
It may be an easy thing for you to live without a bathroom heater fan, but you still need some types of units to help you with ventilation. Because when you take a shower, you create steam which leaves you with an abundance of moisture left in the air. Let me ask you a question, where exactly do you think all of the moisture goes? It does not have any place to go, so it is absorbed by your wood molding, cabinets, cloth, shower curtain, rugs, towels, decorative items and all other items that can consume in your room.
Poor ventilation makes moisture tarries in a bathroom, and it can lead to the growth of mildew and mold which of course you know they are living and growing organisms. Furthermore, apart from decay and mold growth, there is another serious problem with your wood in the room, the moisture over time will make it rots and will incur a lot of expenses in the future when you have to begin switching moldings etc. Not to mention, the odor of mold as it proceeds to get extraordinary.
Maybe your goal is to install an extractor fan that is manufactured by a trusted company such as green wood or silent that complies with all building regulations. However, if you absolutely cannot add the duct-work to your bathroom, a ventilation bathroom fans your next best option.