Spam: If you think your submission was unfairly caught in the spam filter, message us right away using the " message the moderators" option below so we can quickly remedy it. The mods are forever on-call here instead. There's also the HVAC discord that seems like a pretty chill place to hang out - this is not operated by the r/hvac moderation crew. R/construction (for the lols and the hahas) 4 pleated air filters manufactured by FilterBuy are a guaranteed fit for your AC of Furnace. R/airconditioners (window units, wall shakers and all related equipment) R/kitchensuppression (for commercial range hood/restaurant fire suppression) R/airbalance (for Test, Adjust and Balance professionals) By this I mean a filter box that will hold a commercial 4 filter which is a nominal size (actual size is 3 5/8). R/refrigeration (commercial refrigeration stuff) R/ProHVACR (questions about owning or operating a HVAC company) R/askanelectrician (for basic electrical questions) r/HVACAdvice (for Homeowners or others looking for HVAC advice, quote reviews and general questions from outside the trade) Message the mods with picture proof of industry involvement and your username for "Pro Flair"Īds and offers/requests for work are prohibited. This is a subreddit for hvac professionals to discuss tips, tricks and information - including humor, memes and our favorite jobsite supervisors. Any and all questions from outside the trade go in r/hvacadvice. ![]() This is not a question and answer subreddit. We will not manually approve posts that don't fit this criteria. This subreddit's spam filter requires an account older than 24 hours and positive combined karma in order to participate. If easily accessible, measure the air filter housing slot, or refer to your furnace instructions manual for more information.If you are experiencing issues with your HVAC system PLEASE call a professional. If a pre-existing filter is not available, inspect the unit for a listed size. The Actual Size is the exact size of your air filter and the true dimensions when you measure the length, width, and depth (thickness). To measure your air filter, use a tape measure to determine the width, height, and depth. An example of actual size dimensions would be: 15 ½” x 19 ¾” x ¾”. Filterbuy 16x25x4 Air Filter MERV 11 Allergen Defense (2-Pack), Pleated HVAC AC Furnace Air Filters Replacement (Actual Size: 15.38 x 24.38 x 3.63 Inches) 4. ![]() Most actual size measurements include fractions. On air filter packaging this number is typically listed under or to the side of the nominal size, and is normally in a smaller font size. ![]() These are the exact dimensions of your air filter when measuring length, width, and depth (thickness). An example of nominal dimensions would be 16” x 24” x 1”. These measurements indicate the length, height, and depth (thickness) of the air filter, rounded up to the nearest inch. The dimensions listed on the side of air filter frames and printed largest on air filter packaging are normally the nominal size dimensions. Measure your old filter to the nearest 1/8" of an inch, if the size is on a 1/16" mark, then round down to the next 1/8". ![]() It is important to understand that these dimension sets are the nominal and actual dimensions of the filter, and the differences between the two. Determining the proper air filter size can be confusing since filter packages generally display two sets of dimensions. An improperly sized filter may have limited performance. These basic tips will get you perfect air filter measurements!Ĭhoosing the correctly sized air filter is important in order to keep the air clean in your home.
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