What is the opening size for a 300x300 exhaust fan?
2 Answers
300x300 exhaust fans come in two types: one is designed for integrated ceilings and fits into 300x300 aluminum ceiling panels, while the other is a standard exhaust fan. Below is relevant information: Exhaust Fan: An exhaust fan is a type of air conditioning appliance that uses an electric motor to rotate the fan blades, driving airflow to exchange indoor and outdoor air, also known as a ventilation fan. The purpose of an exhaust fan is to remove stale indoor air and regulate temperature and humidity, widely used in homes and public places. Ventilation Principle: During the process of expelling air outward, an exhaust fan creates a drop in indoor air pressure, thinning the indoor air and forming a negative pressure zone. Air flows into the room to compensate for the pressure difference. In industrial applications, exhaust fans are typically installed on one side of the factory, with air inlets on the opposite side, creating a cross-flow ventilation from the inlet to the exhaust fan.
As someone who enjoys tinkering with various tools and equipment, I've installed exhaust fans many times. For a 300x300mm fan, the cutout size usually needs to be around 305x305mm, slightly wider than the fan itself, to accommodate the frame and sealing strips. When working in the garage, I always use a tape measure to mark the position carefully to avoid damaging the wall, similar to how you'd install a car engine's cooling fan. Before cutting the hole, always check the fan model specifications—some brands require a 310x310mm opening. Remember to turn off the power first, test the dimensions, and cut slowly—safety comes first. If you make a wrong cut, you'll have to use filler to fix it, which wastes both time and money. During installation, ensure the ventilation duct fits snugly; otherwise, air leaks will reduce efficiency, just like how a car's exhaust system must be tightly sealed during modifications.
