![]() ![]() It’s important that the specific testing has been done through a company such as Home Ventilating Institute (HVI) or the ASHRAE. The only way can feel confident when shopping is to buy your fan from a company that has paid for an accurate CFM test done through an HVAC organization. Unfortunately, there is no real way to enforce these brands overreporting their fans’ performance - so they get away with it. We know how important it is for you to have accurate information to make the correct business decisions. We paid all of the fees for testing/certification with the HVI because our goal is to provide accurate information about our products. We’ve previously tested many of our biggest competitors' fans ourselves and confirmed that their CFM levels are overstated by 20-25% on average. The vast majority of brands that sell online will report incorrect CFM figures. Now, here’s where things can get convoluted for anyone shopping for fans. As you might imagine, this tends to inflate the CFM rating - sometimes by as much as 50%! This method takes into account not only the volume of air that a fan can move, but also the static pressure within your ducting system. ![]() The second way to test CFM is known as "total pressure" or TP. It tells you exactly how much movement the fan produces at zero static pressure. This is a true measure of the volume of air that a given fan can move. The first way is what's known as "free air delivery" or FAD. The fact is, there are two different ways that companies can test and advertise the CFM rating of their inline fans. Unfortunately, it's not quite that simple. You might be wondering - what's wrong with just using the CFM rating on the fan itself as a guide? After all, if a company is selling a 400 CFM inline fan, shouldn't that be enough to effectively ventilate a 400-cubic-foot grow room? Why the True CFM Meaning for Fans Can Easily Become Convoluted We'll talk more about how to do that in just a minute - but first, let's discuss the importance of truly understanding the meaning of CFM. That's why we always recommend that our customers take the time to calculate their CFM requirements before shopping for an inline fan. If you purchase an inline fan with too low of a CFM rating, it won't be able to keep up with the air changes required in your space - and if you buy one with too high of a CFM rating, it will cost more to operate than necessary while also creating more noise than necessary. When it comes to inline fans, the CFM rating is going to be one of your primary concerns because this will ultimately tell you what size room or grow space your fan can effectively ventilate. It's a unit of measurement that tells you the volume of air that a given fan can move in one minute's time. ![]() In the simplest terms, CFM stands for cubic feet per minute. What does CFM mean in fans? What Does CFM Mean in Fans? The Meaning of CFM in Air Flow Defined We don't want to waste any time - let's get right into the topic at hand. Not only will we define the meaning of CFM in air flow applications - but you'll also learn how to calculate your unique CFM requirements - no matter what you're using your fan for. And today, we're going to unveil the CFM meaning for fans so that you can size and shop for your equipment with confidence. At TerraBloom, we've earned the reputation as the most trusted source for all things ventilation components. Otherwise, you run the risk of undersizing or oversizing your inline fan - and in either case, problems will arise.įortunately, if you've been wondering - what does CFM mean for fans? - you've come to the right place. Whether you're preparing your indoor growing space or looking to improve the climate control capabilities in your home or office space, you need an in-depth understanding of the meaning of CFM in air flow. Looking to gain a deep understanding of the meaning of CFM for air flow in fans? Your search ends here! ![]()
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