The example shown most certainly is correct. Joined Jan 13, 2008 Messages 74. Fans are typically not very expensive but can be very cost-effective in many applications. Fortunately, it's usually possible to reverse the direction of a vent fan using some basic tools. The image above is a great example of a common fan you might run across. But did you know? Airflow through the case is important, so yes, it matters. Once you’ve got the basics down it’s not hard at all! Firstly, the wind normally blows only in one direction IF you’ve noticed. Question- I have the corsair H110 mounted EXACTLY as shown in the picture, (top-mounted) with the fans mounted to the bottom of the radiator. Have a good day and thanks for dropping by. Please use our contact form for any further queries. If not, I’m thoroughly confused. They’re helpful for many common uses and problems, but there are some things you might not know about them. If the direction was counter-clockwise, then yes it would be the opposite. The only problem is i cant remember which way the rear case fan was facing. Right now, they are set as intake fans, so they blow air in, and not out. 2. Neutral pressure – Air pressure in the case is equal to air pressure outside of the case. It blows from the convex side to the concave side, sort of scooping the air. Copyright © Copyright © 2017-2021 AFresherHome.com. Conversely, run a fan clockwise to amplify the heat from a fireplace or any other heat source in a room. If the fan’s direction is reversed, the air will go the opposite direction as it would be forced downward (towards the rear) instead of the front. Centrifugal fans can only blow air radially outwards. You can also look at the curve of the fan’s blades to determine how it’s carving the air, or spin by hand and feel for airflow. A heat sink that is both active and passive blows air through the finned radiator to help the heat escape faster.. Case fans. Now obvious, winds don’t blow from both directions right? The fan’s purpose is to give additional airflow when the vehicle is moving slowly- at high speed, the forward motion of the vehicle pushes enough air through. Doing so allows you to reinstall it facing the opposite direction, thus changing whether it is "sucking" or "blowing." Be sure you’re using fans to improve your quality of life (and save money) as much as possible! I have replaced the evaporator fan of my refrigerator (Chinese generic brand). Left: This fan is the most common type, as it can be mounted backward if you need to reverse airflow. Or, you could watch the fan as your computer is powering off (the fan accelerates too fast due to electricity as it's starting up which makes it impossible to tell unless you're Ted Williams, but when it's slowing down, it's just friction and some magnets). I have a Define Mini C and it comes with 2 stock fractal design fans. Determine where the PSU is intended to fit; this is typically at the bottom of the case in most modern chassis designs. As I have also advised many times. Generally, you want the case fans in front of the case drawing in air while the fans at the rear blow air out. Do not mount exhaust fans on the bottom of the case; since hot air rises, a bottom-firing exhaust fan will be working against physics by expelling slightly cooler air instead of warmer air. Grab a small piece of paper and lay it across the fan when PC is on. 23 posts - 20 authors - Last post: 24 Jul 2007How do you tell which way a fan blows?. Which direction is the evaporator fan supposed to spin? save. Since you only supply power, there is a controller in the fan that senses rotor position and commutates the motor accordingly. Likewise, if the blade is angled down and the fan turns the opposite direction, the reverse is true. Should the fans be set to blow air through the radiatior and out to the top of the case? Ceiling fans are the must-have home appliance for summer, but did you know that ceiling fans are also handy in the fall and winter? Long story but i had to take it off and put it back on and don't know if i hooked the leads back up correctly. Before the advent of electrical fans for cooling radiators, the mechanical fan was exclusively driven by a fan belt attached to the front of the engine. The wisest course is to remove the fan and install a GM supplied part. One set of twin fans sucks while another other set of twins blows. I appreciate this site, but in the “every day example” you have of a PC case fan, isn’t that reversed? The fan’s purpose is to give additional airflow when the vehicle is moving slowly- at high speed, the forward motion of the vehicle pushes enough air through. alot of times it doesnt matter which way the fan goes, but just put it to blow air towards the heatsink if you're not sure. It’s best to run the fan on a low speed so that it doesn’t create too much of a cooling breeze. report. In this video, I explain how to setup your cooling fans to create neutral movement air flow. The direction a fan blows air is always determined by (A) the shape of the blades (sometimes called propellers) and (B) the direction they turn. I often find that people don't explain how a fan works, and instead they just go off how fans are assembled, so I figured I'd add this: case fans will usually have a side shaped like the inside of a scoop. You can tell: - Apply power and put your hand in front of it. As I'm sure any rockstar could tell you - the bigger the fan, the better the blow. How can I tell which sides expelling air? The Intake-exhaust direction should go front-to-back and bottom-to-top. In simple terms, a computer case can either have: Positive pressure – The case fans push more air into the case than then pull out, so there is more air pressure inside of the case. it does matter. This causes air to blow upwards (to the front of it). Not only that, I’ll help you better understand how fans work along with sharing some helpful facts to know. How do I determine in which direction the fan in my NH-D15S should face? Close. I used an Universal Evaporator Fan that can run both in a clockwise or anticlockwise direction. Fans are everywhere it seems! By looking at the fan and knowing which way the blades are angled, and knowing that it normally turns clockwise, I can see that it will blow air forward. As the fan spins, it can be thought as chopping at the air. I can’t stop laughing, an article which trying to teach other people, had it wrong itself. Wanted to connect it only in hot weather. Then I thought of putting a computer fan on the desk for hot summer days but I couldn't tell from the picture in which direction the fan would rotate. When looking at our fans, the Front or Intake side of the fan will always be the side that has the Cooler Master Logo in the center of the blades. But do you know how to tell which way a fan blows? The built-in electronic circuit manages "commuting" the magnetic field that causes the rotor to turn. This morning i stripped the PC to clean out all the dust. Once you’ve located where the PSU will sit, check the case for any grills or vents directly beneath this location. If the fan is not OEM, the air volume may be off and the electrical characteristics could be different. So, with that said, does anyone know if the direction the fan spins is a standard? If the fan is attempting to blow into a restriced area (like into a PC heatsink with little clearance) the air can't be thrown outward and away efficiently and instead creates pressure waves and the fan ends up pushing those pressure waves around in a circle in the cavity and moving much less air in total. The fan at the bottom of most laptops blow air out, so wouldn't a cooler that blows air onto the laptop work against the laptop fans? As I have also advised many times. To determine which is the correct orientation for the fan, observe the location of the manufacturer’s sticker on said fan – that’s the direction into which the air is blowing. Fans powered by alternating current (AC) such as common household 120V or 220V fans typically can only blow forward. Suck into the case, blow out. If a blade is angled down and the fan turns in the same direction as the blade angle, it will blow forward. They work off of the principle known as forced convection. So you mount the fan in the direction you want the air to go. Therefore, unless the power polarity is reversed, it will blow air forward. should the fan blow air into the freezer or draw air into the coils? Here the rear 80mm fan works as an exhaust fan for the PSU. Thanks. If not, or if you want to be sure, turn the computer on with the fan connected, and put a piece of paper against it to see if it blows away or gets pulled to it. Keep the fan direction in mind when you’re looking to cool down or warm up a room. Since the old fan was broken, I couldn't know on which direction it was set to run. How do most people have it? That’s because a fan always has the same basic design in one form or another: fans use angled and slightly curved blades to cut through the air and force it forward or backward depending on the direction of rotation. It should draw air through the radiator from front to back. First I wanted to buy a new computer case fan in eBay. However, from time to time it can be found on others. Radiator Fan direction, Suck or blow, in or out? (can't test as waiting for motherboard). How to Tell Which Direction the Ceiling Fan Is Going for Heat. Here’s a helpful post with some of the best tower fans you’ll find today. Electric fans can run and help cool you and your room with up to an amazing 60% less power than air conditioning units! AFAIK, most 80mm fans have an "arrow" imprinted somewhere on the fan housing which points the direction of airflow Quick rule of thumb: the fan will blow the air across the motor 'always'. Perry, To make it short, Yes, the evaporator fan should be blowing the air into the freezer compartment. Air should travel in clear path through the case. 2 Observe the direction the fan blades are turning. Try checking that. Hello Tony. Works a treat with fan pulling air into case onto graphics card. Heat sink and CPU fan. In this post, I’ll share with you the details you need to do so. Question- I have the corsair H110 mounted EXACTLY as shown in the picture, (top-mounted) with the fans mounted to the bottom of the radiator. You will also be able to identify the Exhaust side as you will see power wires entering the fan motor. Just remember these basic tips: Do you have suggestions, more questions, or wish I covered some topics in more detail? While many variations of fans exist, nearly all fall into just a few basic categories as the most important design principles are the same. If you want the fan to cool the liquid running through the system the fan pulls (sucks) air through the surface area fins to dissipate heat. Some fans will have arrows on the side pointing in the direction that air flows through them when turned on. If you look at a PC fan case with directional arrows you’ll see it matches what I’m describing. Reversing the direction of rotation will be difficult. However, direct current (DC) fans are often reversible. The fan should blow air toward the engine (i.e., same direction as the air flow when the vehicle is in motion). That coupled with the dynamics of a condenser unit design, the ambient air is going to balloon or mushroom inside the unit rather than go out through the coils effectively. Hi Don. If that doesn't work, try holding a tissue paper or something else breezy up to the fan - If it gets sucked towards the fan, it shows you that the fan is intaking from that direction, and if it blows outward, then it's exhausting air. Being able to tell which way a fan blows isn’t difficult in most cases. Basic methods to work changing the direction of a fan blows? through finned! Or `` blowing. this causes air to go in to the front of it DC ) and used many! Now obvious, winds don ’ t cool a room, offering a continual effect that makes you comfortable. Fans work along with sharing some helpful facts to know how much energy a fan blows isn ’ have... 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