- Step 1 - Measuring Length and Width (L x W). (If your filter is not a square, the smallest measurement goes first).
- Step 2 - Measure the thickness (Depth) of your filter from front to back.
- Step 3 - Put Your measurements together (L x W x D).
How do you know your air filter size?
Actual Size: The actual size of an air filter is typically written in the fine print on the frame of the filter and is usually 0.25"-0.5" smaller than the advertised, nominal size. The actual size is what you'd find if you used a ruler to measure the exact dimensions of the filter.Jul 13, 2020
Which way does the 3m air filter go?
Make the arrows face the ceiling or wall. If your filter is on the ceiling, the arrow should face the ceiling. If your filter is on the wall, the arrow should face the wall.
Which way does a Filtrete filter go?
https://www.youtube.com/watch?v=qCNIc1y18pA
What happens if you install air filter backwards?
By installing your filter backwards, air will have a harder time flowing through the filter and your air handler will have to work harder to make up for the loss of airflow. This could lead to higher utility bills and possibly damage your furnace or air conditioner.Dec 19, 2017
Can I use a 1 inch filter instead of 3?
Most HVAC technicians recommend changing 1-inch air filters every 30 days, while 4-inch filters can be changed every 3–6 months. Some 4-inch filters can even last up to a year.Nov 15, 2018
Can I use 4 1 inch filters instead of a 4 inch filter?
While a 4-inch-thick filter is more efficient than a 1-inch filter, the right size depends on your furnace. If you measure the filter slot, and it's large enough to accommodate the thicker filter, then you can use it. However, if the slot is less than 4 inches wide, you're stuck with using that thickness.
Can I use a 1 inch filter instead of 2?
If your system only fits a 1-inch or 2-inch filter, a high MERV ratingMERV ratingMinimum Efficiency Reporting Value, commonly known as MERV, is a measurement scale designed in 1987 by the American Society of Heating, Refrigerating and Air-Conditioning Engineers (ASHRAE) to report the effectiveness of air filters in more detail than other ratings.https://en.wikipedia.org › Minimum_efficiency_reporting_valueMinimum efficiency reporting value - Wikipedia could be detrimental. A 1-inch filter with less surface space will get clogged fairly quickly and need to be replaced much sooner than a thicker filter.
Can I use a larger furnace filter?
If your current furnace only allows for furnace filter sizes with a depth of one inch, HVAC contractors can modify the furnace to accommodate larger sizes. This does take work and time. However, homeowners get to use better furnace filter sizes that do more for home comfort. They also worry less about their furnaces.Aug 26, 2019
How often do you change a 4 inch filter?
every six months
How long is a filter supposed to last?
When to Change an Air FIlter Fiberglass filters are a lower cost option, but they need to be disposed of and replaced roughly every 30 days. Pleated air filters are usually made of higher quality materials and can last anywhere from three to six months depending on the material, manufacturer and the frequency of use.