Air Filter Sales & Services FAQ
What is the difference in filter efficiencies (MERV); trade-offs between efficiency and air resistance?
As you increase the efficiency and MERV rating of a filter, it will become simultaneously more resistant to airflow. Higher resistance requires more energy and stress on the equipment to force air through a finer filter. That is the trade-off to consider if you want to increase the MERV rating.
What’s the difference between nominal and exact measurements?
Much like a 2×4 piece of lumber is smaller then 2×4, the exact measurement of a filter is usually smaller than the nominal size. For example, a 16x25x1 standard (nominally sized) filter is closer to 15-1/2 x 24-1/2 x7/8. However, if you are ordering a custom size filter that we make for you, please tell us the exact size that you want.
How long does a filter last? And how should I know when to change my air filter?
Filter life depends almost entirely on operating conditions. You may need to change a 4” thick filter only twice a year in a home, while you might need to change it every month in an industrial application.
How do I decide what kind of air filter I need for my application?
There are countless approaches to determine the right filter for a certain application, whether government guidelines, equipment specs, industry standards, or even personal preferences. Call us if you would like our help to work through your options.
Do you provide filters for automotives?