The 12 Best Custom Furnace Filters (2022 reviews)

custom furnace filters
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Are you planning to buy custom furnace filters, and are you confused about the options ? Your search ends here.

Our review process:

Our Top Picks:

Best Overall:
Buy: Aprilaire Custom Furnace Filter
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Best For Customer Service:
Buy: Lennox Custom Furnace Filter
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Best For Less Cost:
Buy: Filtrete Custom Furnace Filter
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Best For Nominal Size:
Buy: Aerostar Custom Furnace Filter
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Best For Better Air Quality:
Buy: Kn Custom Furnace Filter
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Best For The Furnace:
Buy: Naturalaire Custom Furnace Filter
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Best For Large Particles:
Buy: Deflectair Custom Furnace Filter
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Best Carbon Material:
Buy: Af All- Filters, Inc. The American Filter Company Custom Furnace Filter
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Best For Odd Size Filters:
Buy: Airstarfilters Custom Furnace Filter
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Best For Central Air:
Buy: Aqua-Flo Custom Furnace Filter
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Best For Pet Owners:
Buy: Filterbuy Custom Furnace Filter
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Best For High Quality:
Buy: Airteva Custom Furnace Filter
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Best Overall: Aprilaire Custom Furnace Filter

Aprilaire Custom Furnace Filter
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We are personally inclined towards Aprilaire custom furnace filter, It is not so pricy, but it overachieves its purpose and is outstanding in important aspects. The Aprilaire custom furnace filter is installed easily and it is good for perfect condition. Aprilaire's patented self-seal technology assures no air will pass by unfiltered, keeping your home clean and the hvac system operating at peak performance. The Aprilaire 213 healthy home allergy air filter removes common airborne allergens including dust pollen, mold spores, bacteria, pet dander, and dust mites as they pass through the Merv 13 filter.

Finally, the Aprilaire custom furnace filter is a scale used to measure the effectiveness of air filters.

Almost all buyers agree that the filter is easy to install and really traps all contaminants. Also, they say that the filter is a five - minute affair to replace. Moreover, they strongly agree that this filter is used once for a long period of time. Overall, most customers agree that the filter is functionally comfortable and no one questions it.

Top Customer Quotes:
  • Every new HVAC installation should include the box that holds this filter.
  • This fits fine in it'sssss vertical slot.
  • This can you check the air cleaner number instead.
  • This can be found for a decent price and it is highly recommended.

Best For Customer Service: Lennox Custom Furnace Filter

Lennox Custom Furnace Filter
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The Lennox Custom Furnace Filter's material feels more premium than its price would suggest. The lennox custom furnace filter is designed for great prices, fits as advertised and it is great for good quality filters. Make sure this fits by entering your model number. Also, this is great with the correct size, the price is right and it allows for a great deal.

Most importantly, the lennox custom furnace filter is made for very good filters and it works as advertised.

Almost all customers found that the filter fits exactly as described and can be used in the old system. Further, they also found that the filter is as good as the more expensive original. Moreover, they say that this filter is slightly smaller on each dimension and fits perfectly.

Top Customer Quotes:
  • This fits perfectly, makes for a great buy and it works for the same brand.
  • This is 5 inches when it isn't even close.
  • The front of the machine where the filter is installed opens with some strength.
  • Nominal size: 16" x 25" x 5".

Best For Less Cost: Filtrete Custom Furnace Filter

Filtrete Custom Furnace Filter
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Filtrete has been making great filters for years, thanks to a combination of clever design and appropriate materials. The Filtrete Custom Furnace Filter is less restrictive and has a rigid design. You run a tight ship at home, from floor to ceiling. The filtrete dust reduction filter attracts and captures household dust and is ideal for high - velocity equipment.

Finally, the filtrete custom furnace filter is great for repeat customers and it is great for good news.

Almost all buyers opine that the filter comes in a pack of 6, so it is good value. Further, they strongly agree that the filter is much cheaper to buy like this. Also, they say that this filter is adequate and priced right.

Top Customer Quotes:
  • Sign-up for a filter change reminder program that works for you.
  • This fits the need perfectly and takes things out of the air.
  • This is a perfect fit for the furnace.
  • It is great to have spare filters in the house.

Best For Nominal Size: Aerostar Custom Furnace Filter

Aerostar Custom Furnace Filter
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The Aerostar Custom Furnace Filter's material feels more premium than its price would suggest. The aerostar custom furnace filter fitted perfectly and it was the correct size. They also improve the efficiency of your hvac unit and therefore reduce maintenance and utility costs, by removing dirt and reducing strain on the motor. These filters are made with electrostatically charged synthetic material that draws and captures allergens between 03.

The filter is cleanable and it has reasonably priced filters. Also, the filter is compatible with furnaces and it is made for a price point. Lastly, the aerostar custom furnace filter fits perfectly and it is great for repeat customers.

Most customers quickly discovered that the filter is made from a polytheistic blend. Also, they also found that the filter is easy to install and great value for the money. Furthermore, a few also found that the filter is a great way to find unusual sized filters. Overall, many buyers have used the aerostar custom furnace filter for more than a few months without letup, and it shows no sign of giving up.

Why We Like This:
  • This is designed to filter microscopic particles such as lint, dust mites, spores, and pollen.
  • 100% synthetic electrostatic media for high efficiency with low air flow resistance.
  • This is for grocery stores and it can be replaced with better filters.

Best For Better Air Quality: Kn Custom Furnace Filter

Kn Custom Furnace Filter
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Kn line of filters comes in a pretty wide variety of styles, so you can definitely find one that suits your individual preferences and needs. The new custom furnace filter has increased hvac efficiency, It works well for direct replacement and has a creative design. High airflow helps reduce hvac system strain and requires less energy, which can translate into savings for you. Also, it is great for many years, allows for dog hair and it has follow directions.

The filter is built with a solid frame, Thirdly and it is very simple. Lastly, the Kn Custom Furnace Filter worked fine, is more efficient and it is great for dust particles.

Most customers agree that the filter is a "good" HVAC air filter alternative. Moreover, a few also found that the filter fits correctly with great airflow. Moreover, they strongly agree that this provides a good seal for the filter and prevents any movement as well. To sum up, for almost all customers, the product was just what they wanted.

Top Customer Quotes:
  • This is quieter than electrostatic filters.
  • This has been brought into the home, with k&n’s new washable, reusable hvac air filter.
  • This comes with it having a smaller head.
  • This is good for not restricting air flow.

Best For The Furnace: Naturalaire Custom Furnace Filter

Naturalaire Custom Furnace Filter
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The natural custom furnace filter's material feels more premium than its price would suggest. The natural custom furnace filter is made with fast shipping and it works excellent. The flanders cut-to-fit air filters remove harmful particles to keep the air in your household or office clean and fresh. This filter uses a bluewhite rigid fiberglass with light lamination on the downstream side that maintains the minimum listed efficiency through the 30.

The filter is too large or fails to catch impurities if it is too small. Finally, the Naturalaire Custom Furnace Filter is great with the correct size, is best for pet hair and it is best for the next day.

Almost all customers agree that the filter is easy to wash and reuse as well. In addition, they say that the filter is as good as home depot, only better and cheaper. Also, a few strongly agree that the filter works well with the furnace. In short, at the price, they believe that they got a steal of a deal with it.

Top Customer Quotes:
  • This holds its shape and it works for fine dust.
  • This is best for a good deal and it is highly recommended.
  • This is great for those odd sized/hard to find filters.
  • This is perfect for those wanting easy to clean, environmentally friendly reusable filters.

Best For Large Particles: Deflectair Custom Furnace Filter

Deflectair Custom Furnace Filter
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We would, of course, be remiss if we didn't mention Deflectair Custom Furnace Filter for daily usage. The deflectair customfurnace filter is easy to store space saving. Manufacturer says: Our poly roll media is the most commonly used in the hvac/r industry. In addition, the filter works as advertised and it is single.

Most importantly, the deflectair custom furnacefilter is designed with proper dimensions and it allows for dust particles.

Most buyers agree that the filter is folded and stuffed in a plastic mailer. And, a few also found that the filter is great for exterior furnace filter. And, a few say that the higher the modern rating, the more it will filter out. To sum up, buyers found this to be one of the best filters for daily purposes.

Top Customer Quotes:
  • This is good for fine dust and it is very easy.
  • This is easy to cut ahead of time, have enough for a year.
  • Meets or exceeds original equipment specifications.
  • This is great for better vent, not easy to cut when mailed folded.

Best Carbon Material: Af All- Filters, Inc. The American Filter Company Custom Furnace Filter

Af All- Filters, Inc. The American Filter Company Custom Furnace Filter
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Best part: af all- filters, inc. the American filter company, custom furnace filter costs comparatively low and it is available to ship in 24 hours. The af all- filters, inc. the American filter company 's custom furnace filter holds its shape and it is very flimsy. Make sure this fits by entering your model number. This material contains no fiberglass and is not for aquatic filtration or use.

The filters are on hand and work really well. Lastly, the af all- filters, inc. the American filter company custom furnace filter washes easily, feels durable and it very easily.

Most buyers opine that the filter is slighter smaller than listed in the ad. And, they say that the filter was designed by a nurse in Texas. Also, a few say that the filter comes in a full sheet, much like you would find cut from a bolt of fabric at the fabric shop. To sum up, at the price, they believe that they got a steal of a deal with it.

Top Customer Quotes:
  • This works well for masks to add to that it is best for ac/heat radiator.
  • These make merv 8 for pollen/dust/bacteria They are thinner giving more air flow.
  • The material can be cut to your desired shape and length.
  • There is no description in the package.

Best For Odd Size Filters: Airstarfilters Custom Furnace Filter

Airstarfilters Custom Furnace Filter
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If you often find yourself confused about the appropriate and satisfactory filter, Airstarfilters Custom Furnace Filter is your solution. The airstarfilters custom furnace filter works well for paint booth filtration and it is great at filtering. Make sure this fits by entering your model number. Moreover, the filter works really well, can be used in hvac and it washes easily.

Above all, the airstarfilters customfurnace filter allows for dog hair, works well and it is less expensive.

Most customers opine that the filter is easy to cut with plain ol scissors. And, they say that the filter has a plastic grid to ensure the filter stays in place. Moreover, a few say that the tacky side of this filter catches stuff non tacky filter miss. Overall, the tone of buyers is very positive and we believe that the filter suits the purpose.

Top Customer Quotes:
  • This is great for odd size filters.
  • This has plenty of filtration surfaces.
  • This is a great way to save $$ and get a perfect fitting filter.
  • This filter media is tough, long - lasting and easy to use.

Best For Central Air: Aqua-Flo Custom Furnace Filter

Aqua-Flo Custom Furnace Filter
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We would, of course, be remiss if we didn't mention Aqua-Flo Custom Furnace Filter for daily use. The aqua-flo custom furnacefilter is great with big savings and it allows for great options. Make sure this fits by entering your model number. In addition, it is perfect size and it is very good.

The filter works better and it is very convenient. In addition, the filter is the ideal replacement for hard to find or special filter sizes. Most importantly, the aqua-flo custom furnace filter works as advertised and it is best for customer service.

Most buyers found that the filter can be used in place of rocks as a drain layer. Also, a few say that the filter is a 100% polyester, which is an inert material, and will not change your water ph. Also, they strongly agree that this filter allows the central air system to breathe easier, but wo n't catch the fine particles.

Top Customer Quotes:
  • This is a merv 6, with 84% arrestance efficiency.
  • This is used for furnace filtering in trailers and it keeps them clean.
  • This is designed to be worth every penny and it comes with great customer service.
  • This is used to replace the factory filter material on BMW cars.

Best For Pet Owners: Filterbuy Custom Furnace Filter

Filterbuy Custom Furnace Filter
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The Filterbuy Custom Furnace Filter's material feels more premium than its price would suggest. The filterbuy custom furnace filter works better and it is recyclable. Regular filter replacements mitigate system malfunctions & reduce energy costs. Further, this has synthetic media and it makes for perfect condition.

The filter is made simple with the inclusion of easy-to-understand arrows on the frame that help identify the direction of air flow and subsequently the way the filter needs to be placed. Above all, the filterbuy custom furnace filter is subject to change depending on the filter size as well as other variable factors for pet owners, allergies households with children, etc.

One customer says - "Too early to tell how well the filter works and stands up. ". Almost all customers agree that the filter fits the carrier unit better than the 21 1/2 x 16 3/8” x 3/4. With no doubts, this product passed the test and had very satisfied buyers eager to share their experience.

Why We Like This:
  • Industrial-grade beverage board frames with dual wire backings outperform standard cardboard designs.
  • Delivers what they promise.

Best For High Quality: Airteva Custom Furnace Filter

Airteva Custom Furnace Filter
Buy on Amazon

Next on the list, we've got yet another filter that manages to win our hearts. It's the Airteva Custom Furnace Filter and it's widely considered as the filter that has the most suitable features. The airteva custom furnace filter is very sturdy, is perfect for a good deal and it works well. If your filter is located in an air handler or furnace, install it in the shown direction, with the writing facing away from the unit. The filter does not have to fit edge to edge tight.

Above all, the airteva custom furnace filter is crafted from industrial - strength aluminum alloy, not cardboard.

Most customers agree that the filter is easy to change the filter medium and change the modern rating for summer and winter. And, they say that the filter fits and seals perfectly. Additionally, it is easy to install an air filter that lasts longer than most. Therefore, buyers were very happy to recommend it to friends and families.

Why We Like This:
  • Airteva filters are handcrafted to your exact size.
  • Be sure to allow for any obstruction in your measurements.
  • This makes for less waste, fits perfectly and it is highly recommended.
  • This fits all makes and models of furnaces and air conditioners.