Non flush-mount ceiling fans come with a downrod, which many times has a ball at the top of the downrod that pivots to accommodate a slope. You can immediately rule out any hugger or flush-mount ceiling fans - those are not meant for sloped ceilings. In fact, most ceiling fans will work on a sloped ceiling. Will a ceiling fan work on a sloped or vaulted ceiling?Ĭeiling fans for sloped or vaulted ceilings are - surprisingly - a dime a dozen. Always look at the CFMs on the label to get the airflow you’re looking for, then select how many blades you want, aesthetically speaking. The main determining factor in airflow is the pitch of the fan blade: The more exaggerated the angle, the higher the airflow. Not at all - blade number is purely aesthetic. Your average fan is around 4,000 - 5,000 CFM at high speed. The higher the CFM, the more powerful the fan. Are you looking for something powerful, or a calm, gentle breeze? Each ceiling fan comes with an Energy Information label (see below) which measures airflow in CFM. Many fans will work with vaulted and sloped ceilings, they may just require an extended downrod for clearance. You’ll also want to take into consideration the ceiling slope. Most building codes require ceiling fans be at least 7 feet above the floor. For larger, commercial applications, you’ll want an extra large (60” and over) commercial-size fan. For more open spaces, a large (50” - 60”) should do the trick, or a few fans if you’re working in a longer, more narrow layout that has more than one junction box. My rule of thumb: If a room is 11 x 11, go with a small (under 30”) or medium (30” - 50”) size. Ceiling fans are not a one-size-fits-all item. You’ll want to measure length, width and ceiling height. Nevertheless, our EnergyGuide data shows that all Modern Fan products perform at the upper range of fans on the market.įurthermore, while DC motor fans are reaching new levels of efficiency, it’s important to remember that all ceiling fans (AC or DC motors) are inherently efficient and use very little electricity to begin with, especially when used to offset or reduce use of air conditioning.What are the main things to consider when shopping for a ceiling fan? It can be challenging to rely on the reported EnergyGuide information alone to determine how the airflow might feel in a given application. It is also important to recognize that in a real world installation, there are a number of variables that can affect air movement patterns and volume, including ceiling height, down rod length, room size/layout, furnishings and airflow direction. Please contact our customer support team with questions about performance data. Many websites continue to provide “high speed” performance data instead of the more current “weighted averages”, making for large discrepancies. Because the standardized test method and the EnergyGuide format has changed over the years (with significant impacts on resulting data), be sure to only compare information which has been published based on current test methods and EnergyGuide label format. They are based on results from a standardized test gathered in a controlled environment and are furnished to help consumers and specifiers compare products. These values are “weighted averages” of high and low speed performance and are intended to represent typical use. Assumes typical use (excluding light).Ĭeiling fan manufacturers are required by federal law to publish an EnergyGuide label for all models in a standardized format, including watts used, cubic feet of air moved per minute (CFM), a resulting CFM per watt efficiency value and an estimated annual cost to use the product. Representing weighted averages of high speed and low speed performance based on DOE/FTC standardized reporting criteria. Based on DOE standardized test method (installed with 17″ down rod).
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