# What Makes A Duct Fan Necessary In The House?

If you are considering something as important as purchasing a duct fan for your house, you might be surprised by just how many types there are to choose from. The ceiling duct fan come in many forms and do different jobs, some of which can be quite difficult to understand. That is why we have put together this article to help you make an informed decision about what type of fan is best for the job at hand.
1. Ceiling Duct Fan:
Ceiling [ec fan](https://www.hgductfan.com/best-ec-fan-for-huge-buildings/) is often the cheapest and most widely used of all kinds of duct fans. They work by pulling air in through a hole in your ceiling. The air then moves through other parts of the house, including rooms, before being exhausted into the air outside your house.
2. Attic Duct Fan:
There is a chance that you might have a ceiling that does not rise above 2 or 3 feet up from your floor level. If that is the case for you, you might choose to use a grow room fan instead of a ceiling system to get cooler air into your attic area. Instead of pulling in cool air from outside, it would just move hot air back down and out again.
3. Exhaust Fan:
You can also use an [air exhaust fan](https://www.hgductfan.com/best-air-exhaust-fan-in-2021/) to move hot air out of your house. The process for this type of fan is almost the same as that for a ceiling duct fan. The only difference is that the ductwork goes through an area that is usually hidden from view, behind your walls, or under the flooring.
4. In-Room Air Return:
In-room air returns fans are actually fans that sit on top of an air filter or some sort of humidifier unit in your house and exhaust hot or cool air into another room in your house. The grow fan is often used in bathrooms, kitchens, and similar rooms where you would have little to no space to put a permanent duct system.
5. Industrial Ventilation Fan:
If you are looking to reduce humidity levels in a room, commercial industrial grow ventilation fans are the type of fans that you will want to use. These types of ducts come with larger and stronger motors that can be used for this process.
6. Portable Duct Fan:
If you are looking for a portable duct fan like grow tent fan, there are two types that you might consider. The first is what you would use for construction purposes such as drywall repair or other indoor work on things like insulation or roofs where there is a need to keep dust and debris from moving from one place to another.
The other type we're talking about here is the one of [6inch duct fan](https://www.hgductfan.com/functions-of-6inch-duct-fan/) that uses an external power source to move air around inside your home or even your office.
7. Hydroponic Fan:
A hydroponic fan is an air filter that works on the same principle as a normal in-room air return fan, except that it draws water from a source instead of outside air. Some people use hydroponic fans to filter the air inside their house's ventilation system and pull it into their hydroponics system for use with plants.