Air Filter Facts

Why should I routinely replace my filters?
– A dirty air filter may cause your HVAC system to work harder and may lead to avoidable maintenance issues
– A dirty air filter consumes more energy and reduces the air quality in your home
– A dirty air filter WILL increase your energy costs and make your home less efficient
– A dirty air filter WILL increase your energy bills

What kind of filter should I use?
All of our filters are pleated with enough filter media to offer you excellent filtration. We offer a MERV 8 rated pleated filter. Picking a higher MERV-rated filter is generally not the right answer. Most HVAC should use a filter with a rating of MERV 8. Older systems should use a filter with a MERV rating of NO HIGHER than 8.

What is a MERV rating?
MERV stands for Minimum Efficiency Rating Value. This rating allows you to compare filters. A MERV tells you how well the filter captures and holds dirt and dust of a certain size. At AHMKAR Filters, we’ve selected a MERV 8 that should work for most home owners.

How long will my filter last?
Your replacement schedule will vary based on your personal situation. AHMKAR Filters air filters are designed to last up to 90 days before requiring replacement. If you have pets or if you live in a dusty or pollen-rich location, you may need to replace more often. We recommend checking your filter monthly.

MERV Filter Efficiency Guide
Some of the common particles related to MERV ratings are pet dander, insecticide dust, smog, dust, viruses, wood, tobacco smoke, spores, bacteria, and pollen.
Some of the most common filters found in residential use only have a MERV rating of 1 to 4. These are typically disposable panel type filters and do not do a good job of filtering the air because they will not stop particles smaller than 10 microns.

MERV 5 to 7 rated filters are a better choice and are more commonly found in commercial applications. These filters will collect particles as small as 3 microns and are a good choice for home owners also.

Filters with a MERV rating of 8 to 12 are used in Commercial and Industrial applications and will stop particles in the 1 to 3 micron range. These filters are a great choice for home owners who want the best dust control possible. When using filters with MERV 9 ratings and above it is important to clean or replace them EVERY 3 MONTHS because they will have a negative effect on air flow when they become dirty. This can lead to performance problems and decreased operating efficiency IN RESIDENTIAL TYPE USE.

Certain filter sizes are custom and require an additional charge. Please inquire at for more details.