Hardware stores stock standard filter sizes, but what if your HVAC system needs something different? Thousands of homeowners struggle with ill-fitting filters that let dust bypass filtration. Discover why custom sizing matters and how to measure correctly. To learn more, visit: https://unitedfilter.com/pages/custom-size-furnace-filters
You know that moment when you buy a new furnace filter, slide it into your HVAC system, and realize it's just slightly too small? There's a gap on one side. Maybe you try forcing it at an angle or even consider using duct tape to seal the space. If this sounds familiar, you're not alone, and your HVAC system probably isn't weird either.
The filter industry standardized around common dimensions like sixteen by twenty, sixteen by twenty-five, and twenty by twenty-five inches. These sizes work for millions of homes, but plenty of HVAC systems were built before these standards existed or were designed for specific applications that require different dimensions. When your system needs a nineteen and one-half by twenty-two and three-quarters inch filter, you won't find it at the hardware store.
Here's why this matters more than you might think. Air takes the path of least resistance, so when your filter doesn't fit snugly, air flows around it instead of through it. That gap is letting dust, pollen, and pet dander bypass your filtration system entirely. Your HVAC works harder, your indoor air quality drops, and you're still changing filters on schedule while breathing contaminated air.
Most people buy the closest size and live with the gap. Some try to compress a larger filter into the slot, which damages the pleats and restricts airflow. Neither solution actually works.
The fix is simpler than you'd expect. You need to measure your filter correctly in three dimensions: length, width, and depth. Pull out your existing filter and measure each side to the nearest one-eighth inch. Don't round those measurements. If you get fifteen and seven-eighths inches, write that down exactly. The printed dimensions on your old filter might be nominal rather than actual, so trust your tape measure over the printed numbers.
Once you have accurate measurements, custom filter manufacturers can build filters to your exact specifications. These companies operate just like standard filter suppliers, except they cut and assemble each filter to order with tolerances of plus or minus one-eighth inch. You input your measurements online, select your preferred MERV rating based on whether you need basic filtration or something stronger for allergies, and they ship the filter directly to you. Turnaround time is typically just a few business days.
If you're tired of dealing with gaps and bypassed air, check out the link in the description to learn more about custom filter sizing. United Filter Company Ltd. City: Oakville Address: 2150 Winston Park Dr., Unit 15 Website: https://www.unitedfilter.com Phone: +1-905-403-0160 Email: sales@unitedfilter.com