![]() ![]() ![]() Next up you need to select the nominal dimensions (length and width) of your filter. In the example picture above the size is "1 inch". The relationship between inch and cm is that one inch is exactly equal to 2.54 cm in the metric. It's the last number written on your filter, usually between 1 to 6. 1 centimetre 0.01 meter 10 millimeter 0.3937 inches. On the home page, first select the product type (furnace filters), then select the nominal furnace filter size (thickness) of your filter. ![]() Finding Your Filter Size on PureFiltersĪfter you have both your nominal size and actual size handy, head over to our website. Our website categorizes filters by the nominal size, making it easier to navigate and find your filter. If you can't find the actual size, it's a good idea to measure it just in case. Your filter or HVAC unit should have both the nominal and the actual size written on it. But taking a closer look at the exact dimensions, the actual size is 19¹¹/¹⁶ x 19¹¹/¹⁶ x ¾. įor example, 20x20x1 is considered the nominal size. Nominal size is the nice "rounded" number that makes it easy to market and categorize filters.Īctual size is the exact dimensions of the filter. The most common mistake we see is customer confusing nominal size and actual size. So in order to avoid selecting the incorrect filter, follow the simple steps below. Too big - your filter may not even fit where it is supposed to go.Įither mistake - can be quite costly because you would have to ship the incorrect filters back to us (and believe us, it's not cheap to ship filters). Too small - air can leak out the sides of your filter, meaning dust/particles will not be trapped. Why is it so important to choose the correct filter size? Some of our customers either accidentally purchase the incorrect filter size or worse, do not even realize they have the incorrect filter size. Actual Size)Ĭhoosing the correct filter size seems straight forward but there actually some common traps that can be a bit misleading. Furnace Filter Upgrade/Maintenance KitsĪ Guide To Furnace Filter Sizes (Nominal Size vs.Please do not hesitate to contact us if you need further assistance or clarification. The table below shows conversion into inches to make it easier for those that live in the USA to visualize. While this chart serves as a great starting point, the best way to get an accurate picture of how large your hoops will be is to break out your ruler and use it as a reference.Īll of our sizes are listed in mm as it is the universal measurement for jewelry. To give you a bit of a benchmark, the largest pair of hoops we carry is 90mm in diameter and the smallest pair we carry is just 10mm in diameter. In order to help you see just how big the hoops you want to order are before you order them, we put together the nice millimeter to inches comparison chart below. Even the images can be misleading at times. We understand that it can be difficult to visualize how big some of the hoops are when all you have is a picture and a number of millimeters. SPECIAL OFFER: 15% OFF your next order with discount code SIZEĪs a thank you for visitng our size guide, we are happy to provide you 15% off your order today! Simply enter the discount code at checkout. ![]()
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