Questions Answered!

About Filters

The primary purpose of a filter is to block dust particles from getting onto your coil. 

Inside of your air handler you have a fan that gently pulls air across the cold coil, reducing the temperature before it is circulated back into your home.  If the coil were to get covered in dust, the air would not have direct contact with the coil, and would not cool down as much as it should.

In wall return

In ceiling return

In the the side of horizontal air handler hanging in garage

In the side of horizontal air handler in attic

In the bottom of vertical air handler, in garage or closet

In between the duct and the air handler.

First, check side of filter to find sizing..

If you can’t find the size this way,
measure your filter using a tape measure:

Measure width

Measure Hight

Measure thickness

If your unit or return does not have a filter, get one in asap.
The measurements can be found by measuring the space where the filter should be.. using the same technique as shown above.

TIP: If you find you have no filter, make sure that you check all locations listed in FAQ “where is my filter”.
It is not good to filter an AC unit twice. Make sure that your unit is not just filtered at a different location, by checking all locations.

Turn AC off and wait for fan to switch off. This will make installation much easier as you won’t be fighting the suction of the fan. 

Determine direction of airflow. (Always towards air handler, or into the wall).
Slide filter into place, or place into return.

Air is always flowing towards the air handler

Air is always flowing from the house, into the wall or ceiling

This depends on a number of factors, including the following:

• The amount of dust in your indoor air

• The presence of pets or smokers in your home

• The appearance of your filter when checked

In general, you should change your filter at least once every three months. You may require more frequent air filter changes during the summer months when your cooling system is in demand or if your filter routinely becomes dirty before three months have elapsed.

How can you tell it’s dirty? Remove the filter and visually check if it’s still white. Once you begin to see discoloration, change it!


As all three options on this website have been selected as our top picks on the market today.. You can rest assured that your AC unit is receiving the best care with any of them.
The goal is to provide sufficient protection without suffocating your air handler.

Minimum Efficiency Reporting Value

Ratings indicate how effective air filters are at trapping airborne particulates, such as dust, dirt and pollen.

The higher the MERV rating, the smaller the passage holes are, and the smaller sized particles are able to pass through.

There are varying opinions about this..

Pleated filters are the newest kid on the block, and have been made popular by large companies in order to keep you purchasing filters forever, and to up-sell “higher quality filtration”. We even spotted a “Covid-reducing-filter”.. Not possible! Just a sales tactic.

Benefit of high Merv
– traps smaller particles.

Downfall of high Merv
– less airflow can get thru, easily causing suffocation to your AC unit.


 — 3 reasons to avoid higher Merv ratings —

1. Higher Merv filters block air flow, which makes it more difficult to sufficiently heat or cool a room because the fan can’t properly circulate the air. Because they have tinier holes through which particles can pass, they get clogged up faster than lower MERV rated filters. The fan will work harder to pull air through the filter due to restriction, so if it has to work harder, it can damage your unit and make it more costly to fix over time. 

2. Higher Merv filters are more costly than lower rated ones. In fact, they can cost up to double the price, meaning you’re shelling out money unnecessarily, for all the reasons listed above. You’re better off going with a MERV 8 or 11, pocketing the difference, and changing your filters at normal intervals (usually about every three to four months).

3. Higher Merv filters need to be replaced more often. So, you have a double whammy: not only are you spending way more money than you need to per filter, you have to change them more frequently because they get dirtier faster. This means you have to stock up more often and deal with the hassle of changing the filter out every month or two as opposed to maybe just twice a winter. Who has that kind of money and time to waste? Not you!

About Best Price Air Filters

We are the best because we provide a niche service that is found nowhere else. We have a refined selection that is diverse yet simple. We have done all the leg work of  

Correct. All of our filters are handmade, starting with the highest quality materials that we can find. Constructed by the most precise technicians we can find, and sent to the best customers we can find!

Your filter will be sent into production the very next morning.  Our production team is super efficient, they always get them manufactured in less than 48 hours!
A round of applause for our production team!


We will put your filter into production the very next day!
48 hours, and your filter will be mailed to you. 3-7 days for shipping and you’ll be good to go!


It is our teams upmost priority to take care of you, your AC filter, and your data.

Absolutely, you will receive an invoice with order details listed for your convenience.

As all filters are made custom to size, therefore, we do not accept returns. Please be very precise when measuring, and entering your size, following all guidelines as listed on FAQ page.
If you have a question or concern about your filter, please contact us via the form on “contact us” page. Please contact within 7 days of receiving. Our team will try their absolute best to help solve any issues. We are here for you, and want you to be satisfied with your purchase.