ac filters, furnace filters, hvac filters, air filters 

Frequently Asked Questions AC Filters, Furnace Filters, HVAC Filters

Q1.     What do Free Shipping and/or shipping cost mean?

Please refer to our website for current pricing but most of our products include Free Shipping unless otherwise noted when checking out.

Q2.     Are these filters made in the USA?

Yes, all our filters are manufactured in America using supplies, materials and components that are new and that meet or exceed filter manufacturing standards.

Q3.     Does FilterClub use fiber glass in their filters?

Our filters do not contain fiberglass.  The filter media and frame are manufactured in America using new supplies, materials and components and that meet or exceed filter manufacturing standards.

Q4.     What are the standard Filter Sizes?

Please see our Filter Size Guide or individual filter options for more information. If you have a question with one of our filter sizes see our Filter Size Guide or simply email so we can help you determine the right filter size.


Q5.     How do I determine the size filter I need?

The easiest way to determine your size is to look at the currently installed filter.  Most filters have the size listed on the frame.  If this filter fits well, then simply use the same size when ordering from FilterClub.  If your filter doesn’t have a size, or doesn’t fit well, temporarily turn off your AC unit and measure the air filter opening.  If you have any questions, simply email


Q6.     Why are their 2 sizes listed on my filter?

Filters usually are listed by both their "nominal" size and their "actual" size.  “Nominal size” is the size most commonly seen on the filter borders, and “Actual size” is the actual measurement of the filter itself and is usually a little smaller than “Nominal” size.   “Nominal” size is the measure we use.  Please see our Filter Size Guide for more information.


Q7.     I have more than one AC unit – do they have to use the same filter type or filter size?

No, please select a different filter type and/or size for each AC, Furnace, or HAVC unit.


Q8.     I have more than one AC unit and/or ordered multiple filter sizes – how will my filters arrive?

They will all arrive together in the same shipping box or in multiple boxes in the same shipment.


Q9.     Will FilterClub notify me when they ship my filter?

If you supplied an email at enrollment, we will try to notify you when your first filter ships along with tracking information. If you haven’t received your filter please email so we can initiate an investigation.


Q10.   What if I get the wrong size?

Please order the right size the first time (see questions 4-7).  If for some reason you ordered the wrong size please contact us at and we will do our best to make you happy.


Q11.   What if a filter arrives damaged?

If you ever have a problem with one of our filters, simply email so we can get you a free replacement out to you right away.


Q12.   When will I get my first filter or package of filterd?

You can expect to get your order within 10 – 14 days of your order; maybe sooner, we try and hope.


Q13.   What is OGuard™ Technology?

In controlled laboratory tests the OGuard™ active ingredient included in this filter has been proven to be effective against a broad range of household odors, even tough fish odors. In fact, in a recent test against fish odors, OGuard™ technology was even more effective than baking soda.


Q14.   What is Microban® Protection?

Today's high performance filters are capable of trapping many of the micro particles, including some as small as bacteria and fungi, and are designed to last up to 90 days. Unlike some inert particles which may be trapped in your furnace/air conditioner filter, bacteria and fungi are living organisms. Under certain conditions these micro organisms can multiply on unprotected surfaces, potentially resulting in odors and adversely affecting the performance of the filter media. The presence of Microban® product protection in the filter materials is not intended to affect airborne micro organisms, but can help reduce the uncontrolled growth of odor causing microbes on the surface of the filter material itself, where you need it the most.  Microban® is not intended to affect airborne micro organisms.


Q15.   How Often Should I Change Air Filters?

Local air quality surrounding your home and the environment within your home can significantly affect the useful life of your filter.  Pets, painting, construction projects, etc. within the home reduce filter life.  For most homes, we recommend replacing your filter every 60 days or before they become completely covered with dust or other debris.  This will help prevent harmful back pressure on your HVAC system.  Even the highest-quality filter can't do its job right if it's clogged with a thick layer of particles.  Changing air filters more frequently can also help to reduce energy costs.


Q16.   What is a MERV Rating?

MERV means Minimum Efficiency Reporting Value which was developed by the American Society of Heating, Refrigeration and Air Conditioner Engineers (ASHRAE). MERV values vary from 1 to 16. The higher the MERV value is the more efficient the filter will be in trapping airborne particles.  Another consideration is air flow through your HVAC system. Leaving a dirty air filter in place or using a filter that has too high a MERV rating may result in low air flow and possibly cause the system to not function at maximum efficiency.   We recommend a minimum MERV of 8 and a maximum MERV of 11 for most residential applications.

Q17.   What is the MERV rating of the Carbon filters?

The main use of the Carbon filters is to remove odors from the air. In that the filters are made with carbon impregnated media and not from electrostatically charged filter media, the Carbon filters do not have an official MERV rating. If odor control is what you are looking for then the Carbon filters are exactly what you need. However, if you are looking for maximum filtration performance then go with the MERV 13 filters.

Q18.   What is an APR Rating?

APR stands for Accumulair Performance Rating. This rating has been established by the manufacturer of the Accumulair Filters. This rating exists to demonstrate the different levels of efficiency throughout the Accumulair filter line. Generally speaking, the higher the APR, the better the filter performs in capturing small airborne particles. This rating system is an internal rating system and applies to Accumulair filters only.

Q19.   Can Regular Replacement of Air Filters Save Energy and Reduce System Maintenance Costs?

Our air filters are suitable for most residential and commercial cooling systems that use 1” air filters of this type. High quality rigid frames are used to prevent unfiltered air from seeping around the filter and moving into your home or business.  Our filters not only help protect your indoor environment, but also protect your cooling system.  According to the United States Department of Energy “Keeping the filter clean can lower your air conditioner’s energy consumption by 5 to 15%.”  For additional information on how air filters may save energy and reduce system maintenance costs please review information from the U.S. Department of Energy or Energy Star®.


Q20.   Where do I find my air filter?

For most AC systems the filter is located in one of three locations.  If the Air Conditioning return unit (blower) is located in a closet area, often the AC filter slides into a slot on the bottom of the AC unit.   The second location is in a return located on a wall – there is a removable grill and the filter sits behind it.  The final common location for filters is in a return grill in the ceiling.  Don’t forget that if you have two or three inside units, you likely need to replace two or three filters at the same time.


Q21.   How do I install an air filter?

Remove your filter from the shrink wrap and remove the paper wrapper.  Then simply remove your old air filter and replace with your new one – make sure the arrow matches the direction of air flow.


Q22.   How much energy will you save changing your AC filter?

This is impossible to determine for a specific home.  However, the U.S. Department of Energy has stated that keeping the AC filter clean can lower your air conditioner’s energy consumption by 5% to 15%.