Customer Service FAQ

Q: How often should I change my air filter?

A good rule of thumb is to replace pleated filters every 90 days . If you have pets, kids, or allergy sufferers in your space, we recommend changing your filters more often. Regularly replacing your air filters has many benefits, including keeping particles out of your air, lowering your energy bills, maintaining a properly working HVAC, and more. To learn more about how often to replace your air filter, click here .

Question 1

What size filter do I need?

Accepted Answer

To start, check the filter in your unit to find the measurements you need. Most filters have the size written on the frame. Generally, the nominal size will be in large print, and the actual size in small print. If there’s no size listed on your filter, use a tape measure to find out the exact length, width, and depth.
If you don’t see your size, check out our custom tool and create a filter that’s built to your exact specifications.
For more information on finding the air filter size you need, click here.

Question 2

How do I change my air filter?

Accepted Answer

Changing your air filter takes just 90 seconds!

First, make sure you have the correct size. Remember that the nominal size is different from the actual size.
Second, turn off the power supply. You can find a power switch next to your unit. If you don’t see one, you can turn off the power in your fuse box.
Next, remove the old air filter and dispose of it. Make sure you have a trash bag handy since the filter will contain all the pollutants filtered from your air!
Insert the new filter by ensuring the arrows are pointed in the right direction.
Finally, pop (or screw) the cover back in place!

Want more in-depth instructions on how to change your air filter? Click here.

Question 3

What is a MERV rating?

Accepted Answer

MERV stands for Minimum Efficiency Reporting Value and rates the effectiveness of air filters to trap air particles. The higher the number, the smaller the microns the filter can capture, leading to a higher percentage of air particles being blocked from circulating in your home.
At Filterbuy, we offer MERV 8, 11, and 13 air filters. Our MERV 8 and 11 filters are perfect for homes; if there are kids, pets, or allergy sufferers in your home, we recommend opting for a MERV 8 or 11 filter. Our hospital grade MERV 13 filter traps 98% of bacteria without restricting air flow, so it’s a great option for larger homes and businesses.
For a more thorough breakdown of MERV ratings, click here.

Question 4

What is the difference between nominal size and actual size?

Accepted Answer

Nearly all filters go by the nominal size, which is the actual size rounded up to the nearest inch measurement. Usually, the nominal size is printed on the filter frame in larger print, while the actual size is in smaller print.
Want more information about nominal and actual sizes? Click here.

Question 5

What is the difference between a furnace filter and an AC Filter?

Accepted Answer

As if finding the right size isn’t confusing enough, it’s easy to get stuck on exactly what type of filter you need! Not to worry, though, because there is no difference between furnace filters and AC filters. They are the same exact type of product and are always interchangeable.

Question 6

How to install my air filter in the right direction?

Accepted Answer

Find the arrows on the side of the filter frame. The arrows should always face in the airflow direction, so the filter should be inserted with the arrows facing toward the unit.

If you’re having trouble installing your air filter, give our team a call at 855-345-8289.

Question 7

How often should I change my air filter?

Accepted Answer

A good rule of thumb is to replace pleated filters every 90 days. If you have pets, kids, or allergy sufferers in your space, we recommend changing your filters more often.
Regularly replacing your air filters has many benefits, including keeping particles out of your air, lowering your energy bills, maintaining a properly working HVAC, and more.
To learn more about how often to replace your air filter, click here.

Question 8

Are Filterbuy filters electrostatically charged?

Accepted Answer

Yes! Our filters are electrostatically charged, meaning they attract dust, debris, and bacteria more effectively.
To find out more about what it means to have an electrostatically charged filter, click here.

Question 9

What is the difference between fiberglass filters and Filterbuy pleated filters?

Accepted Answer

Not all air filters are equal. At Filterbuy, we manufacture pleated air filters, which are designed to last 90 days and capture over 85% of air particles in your space.
Fiberglass filters, made of spun glass, last an average of 30 days. Since these types of filters allow smaller microns to pass through, they capture a much smaller percentage of air particles than pleated filters can.
While fiberglass filters are less expensive than pleated filters, they last only 1/3 as long and don’t block as many particles from your air.

Question 10

What gets trapped by home air filters?

Accepted Answer

Air filters trap dust, which includes: dirt, dander, mold spores, pollen, toxins released by cleaning products, and small fibers. The MERV rating of the filter determines what percentage (and how small) of dust gets captured.

For more information about what air filters capture, click here.

Question 11

What are Filterbuy’s shipping and return policies?

Accepted Answer

At Filterbuy, we want you to breathe easily with the perfect air filter. That's why we offer a hassle-free exchange and return policy:

Did you order the Wrong Size or MERV Rating?
- We'll gladly help you find the right fit. Simply contact us for a free exchange within 90 days. Our friendly team will guide you to the perfect air filter for your needs. If you decide that you’d prefer a refund, you’ll be responsible for the cost of return shipping.
Change Your Mind Within 90 Days?
- We understand. You can return your unopened and unused air filter for a full refund. However, you'll be responsible for the return shipping cost.
Prefer an Exchange? We Recommend It!
- Exchanges are free and often much faster than returns. Plus, you'll get the perfect air filter for your needs right away.
What if I ordered my filter from Amazon?
- If you purchased your air filters through Amazon, please follow Amazon’s return process. All returns must be authorized by Amazon, and products should not be sent back directly to Filterbuy.
Other reasons for returns or exchanges
- While we've covered common reasons for exchanges and returns, we know situations can vary. If you encounter an issue with your order or need to return or exchange your air filter for another reason, don't hesitate to contact us! Our friendly customer service team is here to help you find a solution promptly.

Shop with Confidence.

We're committed to your satisfaction. If you have any questions about our return or exchange policy, feel free to contact us. We’re always happy to help.

Question 12

How does Filterbuy’s subscription service work?

Accepted Answer

Tired of remembering to replace air filters? We've all been there. Clogged filters mean poor air quality and higher energy bills. Our subscription service takes the hassle out of clean air:

Set it and forget it (or adjust it!): Choose auto-delivery every 1, 2, 3, 6, or 12 months. We'll send you fresh filters right when you need them.
- Need a break? Easily skip a shipment, pause, or cancel your subscription at any time through your account.
Breathe easy, save money: Enjoy clean air and optimal HVAC performance, all year long, plus get 5% off every subscription order!
Convenience delivered: Skip the store! High-quality air filters arrive conveniently at your doorstep.
- Example: If you order 6 air filters to be delivered every 6 months, you’ll receive 6 air filters at your doorstep twice a year. Easy as that!

Learn more about recurring orders and the 5% subscription discount [here]

Need help setting up your subscription? Our friendly customer service team is happy to assist you! Call us at [(888) 955-3740].

Question 13

How do I track my order?

Accepted Answer

We send a shipping confirmation email when your order ships! Check your inbox to easily access your tracking number(s).

You can also track your order here or give us a call at 855-345-8289.

Question 14

Does Filterbuy offer wholesale?

Accepted Answer

Yes, we do! If you’re looking to purchase large quantities of air filters, you can contact us here and a wholesale specialist will be happy to assist you!

Question 15

Do you offer any promo codes?

Accepted Answer

At Filterbuy, we’ve chosen to skip the promotions and discounts, and instead provide quality products at fair, transparent prices. The price you see is the price you’ll always get. Remember you always get 5% off when you sign up for a subscription!

frequently asked questions

What size filter do I need?

How do I change my air filter?

What is a MERV rating?

What is the difference between nominal size and actual size?

What is the difference between a furnace filter and an AC Filter?

How to install my air filter in the right direction?

How often should I change my air filter?

Are Filterbuy filters electrostatically charged?

What is the difference between fiberglass filters and Filterbuy pleated filters?

What gets trapped by home air filters?

What are Filterbuy’s shipping and return policies?

How does Filterbuy’s subscription service work?

How do I track my order?

Does Filterbuy offer wholesale?

Do you offer any promo codes?

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