Here’s the detailed process on how to figure out the CFM easily: Method 1: Using the Air Changes Calculation to Determine Room CFM Now that we know the significance of measuring the CFM, let’s move on to the next step – “how do we measure the measure the CFM?” Quantifying the CFM can be a bit tricky if you’re bad at math, but we have you covered! You just have to follow our instructions, and you’re good to go. Calculating CFM: How to Calculate CFM (Cubic Feet Per Minute) Try to keep both of these aspects in mind when purchasing a fan with the CFM you need. So, air-efficient fans need to have both high CFM along with relatively lower wattage consumption. In such cases, the standard or minimum CFM to label a fan as an efficient one is considered to be 75.Ī drawback to high CFM fans to be considered as an inefficient one is when it consumes high watt energy. But why is that? Does a higher CFM always mean that the fan is more air efficient?įor determining the airflow efficiency, the measured CFM is divided by the amount of energy (in Watts) that is used up when the fan is being operated at its maximum speed level. What Is the Correlation between CFM and Air Efficiency?Īs we already mentioned, top-rated fan manufacturers focus on producing the most air-efficient fans by focusing on the CFM. The measurement of CFM is of immense significance when choosing the right fans for your room to guarantee the perfect balance of airflow, helping you stay healthy and cool at all times.Įven the manufacturers regard the CFM as a key issue in product manufacturing to compete against different brands and come up with the most air efficient fans. When a fan is set to its maximum speed, the CFM is calculated by utilizing both the volume of air and the rate at which the fan blades move. What Is CFM?ĬFM or its elaboration “cubic feet per minute” is referred to as the amount of air that can be moved per cubic foot in a minute.
Let’s dive a bit deeper into what CFM is before we get into how you can use this number to figure out your own needs. The higher the CFM rating, the more airflow there will be to cool or heat your space.
CFM is the amount of air that moves through an area in one minute. It is a measure of how much air can be moved in one minute. In the world of HVAC, CFM stands for Cubic Feet per Minute. How in the world do we calculate CFM for our uses.įor example, how to determine the amount of CFM you need for the size of the room you want better circulated. After you have a firm understanding of what it is, we are going to tackle the how. What the heck it is and what that has to do with air efficiency.