There are plenty of options available while buying 20 4 furnace filters in the market right now, and if you're confused regarding which one to go for, You have come to the right page.

Our review process: Show/Hide

Our Top Picks:

Best Overall: Buy: Honeywell Home 20 4 Furnace Filter READ REVIEW

Best For First Time: Buy: Filtrete 20 4 Furnace Filter READ REVIEW

Best For Prompt Delivery: Buy: Honeywell 20 4 Furnace Filter READ REVIEW

Best For Nominal Size: Buy: Aerostar 20 4 Furnace Filter READ REVIEW

Compatible With Furnaces: Buy: Aerostar Merv Filter READ REVIEW

Best For Important Note: Buy: Nordic Pure 20 4 Furnace Filter READ REVIEW

Best For Home Depot: Buy: Filterbuy 20 4 Furnace Filter READ REVIEW

Best For Pet Owners: Buy: Filterbuy Good Filter READ REVIEW

Best For Customer Service: Buy: Nordic Pure Air Filter READ REVIEW

Best For Heater: Buy: Glasfloss 20 4 Furnace Filter READ REVIEW

Best Overall: Honeywell Home 20 4 Furnace Filter

Buy on Amazon

We know from years of feedback from readers, amazon sellers, and family and friends what most people want in a filter. The Honeywell Home 20 4 Furnace Filter is exactly that - it's a simple filter that hits all the right notes. The honeywell home 20 - 4 furnace filter fits all honeywell homes and most aprilaire, space-gard and trion air bear 20 x 25 x 4 in. Each filter lasts up to one year, so you’ll spend less time changing and tossing filters. This long - lasting filter can capture both microscopic particles like dust and smoke and larger contaminants like mold spores and pet dander.

The filter is easy to order, has the best price and it is very efficient. Further, the filter fits Aprilaire/space-gard models 2200 & 2253. Finally, the honeywell home 20 - 4 furnace filter comes with product dimensions, It works great and it fits perfectly.

Most buyers agree that the filter is also available on amazon. And, a few strongly agree that the filters are the originals, and others have come out since with variations on the size. And, a few strongly agree that the filter fits securely without leakage around the edges.

• It uses more energy, which may cost you more money.
• Consult your owner’s manual for the manufacturer 's recommended specifications.
• This fits perfectly and it is good for fast delivery.
• Along with the health benefits, clean air helps make your home more comfortable.

Best For First Time: Filtrete 20 4 Furnace Filter

Buy on Amazon

The Filtrete 20 4 Furnace Filter is capable of outshining several other filters featured in this list in overall features for the price point. The filtrete 20 4 furnace filter is very cost - effective and it works well. A dirty filter will slow down air flow and make the system work harder to keep you warm or cool. And, this quality is good, is less expensive and it filters well.

The filter picks up most pollens, is best for a competitive price, It is happy with these filters and has a nice design. In addition, it is good so far, fits perfectly and it is designed for good fit. Finally, the filtrete 20 4 furnace filter is best for a very competitive price and it can wait for a great deal.

Almost all customers opine that the filter fits the system and always does the job. And, a few strongly agree that the filter does and if it lasts the full twelve months. Further, they say that this filter slid right into the clean effects housing with slight modifications. In conclusion, many customers have used the filter for more than a few months without any issues, and it shows no sign of giving up.

• This is a box of 4 for over $80 total.
• This has a modern rating of 11.
• This is not the exact size printed somewhere on the filter's border.
• This cleans the air better, plus it is labeled as merv 11.

Best For Prompt Delivery: Honeywell 20 4 Furnace Filter

Buy on Amazon

For a low asking price, Honeywell 20 4 furnace filter has managed to overwhelm their customers by packing as many features as they could. The Honeywell 20 4 Furnace Filter is worth the effort, is best for prompt delivery and it is great for value for the money. Make sure this fits by entering your model number. And, the filter comes with great filters and it is designed for good fit.

Above all, the honeywell 20 4 furnace filter can check for pressure drop and it is good for animal dander.

Most buyers opine that the filter has a high filtration rating. In addition, a few strongly agree that the filter has been great even with construction going on in the house. Also, a few also found that this size specific merv 11 gas furnace filter is not stocked in a local store.

• Static pressure drop (in w.c.): 0.24.
• Honeywell factory original, oem fc100a1003 pleated filter, 16.
• This is merv11 and would filter out some smoke.
• This comes with great condition, allows for great fit and it is highly recommended.

Best For Nominal Size: Aerostar 204 Furnace Filter

Buy on Amazon

We would, of course, be remiss if we didn't mention the Aerostar 20 4 Furnace Filter for daily use. The aerostar 20 4furnace filter provides great value, It works great and it is good for value for the money. 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.

Most importantly, the aerostar 20 4 furnacefilter fits right for the right size, is good for fast delivery and it is well worth the price.

Almost all buyers opine that the filter is way way better value. In addition, a few say that the filters are manufactured, someone stamped “merv 11” on each one, line like an expiration date on food. Moreover, a few say that the actual size of this filter is 19 1/2 " x 24 1/2 " x 3 3/4 ". Please ensure this is the size you need before you order. Overall, many customers have used the aerostar 20 4 furnace filter for more than a few months without any complaints, and it shows no sign of giving up.

• This is affordable and it is compatible with furnaces.
• This is cost effective and it fits the bill.
• This is designed for delivery service and it fits properly.
• This is designed to filter microscopic particles such as lint, dust mites, spores, and pollen.

Compatible With Furnaces: Aerostar Merv Filter

Buy on Amazon

We would, of course, be remiss if we didn't mention the Aerostar Merv Filter for regular usage. The aerostar merv filter allows for great fit and it can ask for good quality filters. Make sure this fits by entering your model number. These filters are made with electrostatically charged synthetic material that draws and captures allergens between 03.

The filter comes with a new furnace and it is best with quality filters. And, the filter is packaged well and it is highly recommend. Lastly, the aerostar merv filter is compatible with furnaces and it is made for good value.

Most customers agree that the filter is nice to order a pack of multiple filters to keep and use as needed. Moreover, they strongly agree that the filter fits the furnace well and the savings on name brand is too good not to pass up. Moreover, they strongly agree that the filter is a perfect fit for an inline system. Therefore, customers were eager to recommend it to friends and families.

• This is cost - effective and it comes with great filters.
• 100% synthetic electrostatic media for high efficiency with low air flow resistance.
• New and hot releases.

Best For Important Note: Nordic Pure 20 4 Furnace Filter

Buy on Amazon

For a low asking price, Nordic pure 20 4 furnace filter has managed to overwhelm their customers by packing as many features as they could. The Nordic pure 20 4furnace filter comes with 4-inch and 5-inch filters. There are many different exact sizes for the different hvac manufacturers. Make sure this fits by entering your model number. This product, as with all nordic pure furnace air conditioner filters, the material is electrostatically charged to attract unwanted particles.

Most importantly, the Nordic Pure 204 Furnace Filter fits beautifully and it can be replaced with better filters.

Most customers found that the filter was not 3-5/8-in deep. Also, a few say that the filter is cheaper, but it fits where others wouldn't. In addition, a few strongly agree that the filters are reviewed well and upon arrival lived up to reviews. Without any doubt, this product passed the test and had very satisfied buyers eager to share their experience.

• Attracts indoor allergens, dust, pollen and other airborne contaminants.
• Manufacturer says: you may also want to look at our honeywell replacement 20x25x5 filter.
• The Manufacturer says: our pleated plus carbon air filters provide heavy-duty air odor fighting power.
• The original filter is 19.5 x 24.5 x 3.625, and it works perfectly.

Best For Home Depot: Filterbuy 20 4 Furnace Filter

Buy on Amazon

Compared with other filters in this category, the Filterbuy 20 4 Furnace Filter has a convenient design. The filterbuy 20 4 furnacefilter is perfect for a good deal, comes with great filters and it has the best price. You can then round these measurements to the nearest inch to find a corresponding nominal size, which will be easier to locate when searching online. And, the filter features an electrostatically charged, pleated design that captures more harmful particles and prolongs the products ' lifespan by 3 times that of fiberglass models.

The filter is subject to change depending on the filter size as well as other variable factors for pet owners, allergies, households with children, etc. In addition, it is very convenient and it allows for a great deal. Most importantly, the filterbuy 20 4 furnace filter comes with a great item and it fits properly.

Most customers quickly discovered that the filter is a very loose fit and has a poor seal when inserted. Also, they strongly agree that the filters are crowded on one side, which limits the proper air draw through. In addition, they say that the toptech 16x25x4 filter measurements are actually 15.375 ” x 24.375 ” x 3.6875 ”, and it fits the box fine. In conclusion, for most buyers, the filter was what they were looking for.

• The filter has v shaped wedges which should be uniformly spaced across the width.
• This has synthetic media and it comes with good filters.
• This is true to size and its price is fair.
• Regular filter replacements mitigate system malfunctions & reduce energy costs.

Best For Pet Owners: Filterbuy Good Filter

Buy on Amazon

If you often find yourself scrambling for an appropriate and satisfactory filter, Filterbuy Good Filter is your end point. The filterbuy good filter is good for the same quality, It is great for repeat customers and has a nice design. You can then round these measurements to the nearest inch to find a corresponding nominal size, which will be easier to locate when searching online. Further, 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.

The filter protects homes from dust, pollen, and more by trapping 90% of airborne particles without impacting air flow. Lastly, a good filter provides great value and it can be bought for good value.

One customer says - "Please note the actual size is not 16 x 20 x 4. ". They also found that the filterbuy 16x20x4 merv 8 pleated ac furnace air filter has an actual size of 15 3/8 " x 19 3/8 " x 3 3/8. To sum up, for almost all buyers, Filterbuy product was just what they wanted.

• This has synthetic media, it is made well and has a very good design.
• This is much better and it makes it stronger.
• Regular filter replacements mitigate system malfunctions & reduce energy costs.
• Industrial-grade beverage board frames with dual wire backings outperform standard cardboard designs.

Best For Customer Service: Nordic Pure Air Filter

Buy on Amazon

We would, of course, be remiss if we didn't mention Nordic Pure Air Filter for regular usage. The Nordic pure air filter is solid, comes with great filters and it is made well. The Manufacturer says: It is best if you measure your filter for the exact size and compare it to the "actual size" listed above. This product, as with all nordic pure furnace air conditioner filters, the material is electrostatically charged to attract unwanted particles.

The filter allows for a great fit, comes with good filters and it comes with good packaging. Lastly, the Nordic pure air filter price is good, is good for the same quality and it is made with fast shipping.

Most buyers agree that the filter fit are medium modern rating, and delivery is prompt. Moreover, they also found that the filter fits in the cavity as required. And, they strongly agree that this particular filter for a combination of modern rating of 12 and reasonable cost.

• These pollutants can cause miserable allergy symptoms like coughing, sneezing and watery eyes.
• This all around and it works well for filtering media.
• This is an odd size to find at local stores and this one works great.
• These are the correct ones and they work.

Best For Heater: Glasfloss 20 4 Furnace Filter

Buy on Amazon

The Glasfloss 20 4 Furnace Filter is satisfactory and appropriate and fits well with your daily use. The glasfloss 20 4 furnace filter works great and it fits well. Make sure this fits by entering your model number. Moreover, this can be used in a broad range of installations, from pre-filters to primary filters for computer room units.

The filter is maximum and it is durable. Lastly, the glasfloss 20 4 furnace filter is great for air filters for homes and it is perfect for a good deal.

Almost all customers quickly discovered that the filter fits and is cheap to buy. Moreover, a few also found that the filter is a 6 pack of filters, nominal 20x20x4 with an actual size of 19.5x19.5x3.75. To sum up, the tone of buyers is very positive and we believe that the filter suits the purpose.

• These offers for the same brand and it is for air conditioning system.
• Durable and sturdy galvanized metal backing.
• Merv 10 efficiency with Merv 8 air flow (.25" w.c.).
• Air filters for homes, businesses, schools, apartments, hotels and industrial.