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4 inch air filter vs 1 inch. He also shares how often you should be changing each type.

  • 4 inch air filter vs 1 inch. Due to their long lifespan, they require Jun 27, 2024 · When deciding between 1-inch and 2-inch filters for your oven or HVAC system, there are several factors to consider such as thickness, MERV rating and lifespan. This usually involves modification of their furnace’s filter rack to accommodate a new, thicker air filter. The section of High-MERV filters increase the static pressure of your system, and if the ductwork is already marginal, this can cause the airflow to drop to a level where the temperature exceeds the furnace’s limit. Jan 11, 2024 · I realized recently that a 2"-thick filter would fit in there. Learn more about how 4-inch versus 1-inch oven filters compare and how they affect air quality. 5x1 8x8x1 8x12x1 8x14x1 8x16x1 8x19. Nov 13, 2023 · Using a 1-inch filter instead of a recommended 4-inch filter for your HVAC system is not advisable. 5x1 9 Oct 19, 2017 · According to AirFiltersDelivered, the 16 x 25 x 5 filter is 15 3/8" x 25 1/2" x 5 1/4", while your filter shows 15 1/2" x 24 1/2" x 3 5/8". 06 Add to Cart 08 x 14 x 4" Air Filter Price as low as $13. Find out what type of filter you need and how often you should replace it. Does furnace filter thickness make a difference to function and longevity? Learn how 5 inch and 1-inch furnace filters compare, and which is best for your home. Obviously if your filter box doesn't allow for size ranges, than this video isn't applicable May 22, 2024 · Learn why 4-inch air filters are better than 1-inch filters when it comes to improving air quality in your home or business. Aug 27, 2022 · Finding a 16x25x5 furnace filter can be hard sometimes. Jan 1, 2013 · K&N air filter 3 inch vs 4 inch height? by rally » Tue Jan 01, 2013 5:46 pm Guys any help is greatly appreciated. If you have a thick five to six-inch filter, it can last from nine to twelve months. On the other hand, you can certainly use a one-inch filter in compartments made to accommodate deeper filters. My question is, putting in a 4 inch filter, will that cause the blower to work harder and possibly burn out the blower motor causing me to replace the entire system? Thoughts and thanks! Jun 3, 2025 · The majority of residential HVAC systems use a 1” thick filter, but filters are available at 2”, 4” and 5” thick. For example, if we assume a single filter cost is approximately equal to the fan cost, then if you have a choice between 1 fan + 5 filters up on legs versus 2 fans + 2 filters, you'd go for the two fan option. Feb 24, 2023 · Thicker air filters such as 2-inch oven filters allow for better airflow than 1-inch filters due to their less restrictive nature. One 4 inch filters are far better. Nov 16, 2023 · In conclusion, the choice between a 1-inch and 4-inch furnace filter depends on various factors, including your HVAC system, air quality needs, budget, and environmental concerns. Jul 16, 2004 · Is the newer 4 inch furnace air filters really that much better then the standard 1 inch filter? I am replacing my furnace and wondering if the 4 inch filters will provide cleaner air. Jan 18, 2025 · Learn about the differences between 4-inch and 1-inch air filters from an HVAC expert. 4-inch filters are common, but some people go even bigger! Nov 18, 2024 · When it comes to improving air quality in your home, learn why opting for a 4 inch thick air filter is better than using a 1 inch filter. 2. Jul 18, 2023 · A big furnace filter is semi-effective way to get cleaner indoor air. Jun 13, 2024 · To put that into perspective, a 1-inch air filter may need to be changed every month, while a 4-inch air filter can last up to six months. Most HVAC technicians recommend changing 1-inch air filters every 30 days, while 4-inch filters can be changed every 3–6 months. The five inch filter would be 1/8" smaller in the 16" direction, not too bad, although larger might be a better direction to have a mismatch. Most of the locals sell from 1 inch to 4 inches. The cheap one will act as a pre-filter filtering large things such as cats or hair. com I started printing out papers that show charts about air flow versus resistance, how low velocity reduces resistance, and pressure drops of different filters compared to a four or five inch. You could confirm your static pressure with a manometer, but usually switching to a larger width filter actually helps increase air flow vs a 1 inch filter. 00 inches. This means that the filter’s capacity could affect the air quality negatively or positively. Apr 24, 2025 · Because 1 inch air filters are the most common, some homeowners may think it's okay to layer 1 inch air filters to fit a 2-, 3-, or 4-inch air filter slot. I prefer the MERV 11 filters (Best Air 2500 brand), which I can get for $9 each. Real quick guys, I have a Rheem furnace it’s approximately 18 to 20 years old. Remember, the size printed prominently is usually the nominal size, which differs slightly from the filter’s exact measurements. Their broader construction keeps bigger HVAC systems running smoothly, and it filters air more efficiently. It offers greater longevity, better airflow, and more effective filtration. They look like this: These filters are also a higher MERV; generally between 10 and 13. My unit takes a 20x25x4 inch filter, but it sits in there really loose and there's a lot of space around it. 5-Inch Air Filters 1-Inch Air Filters 2-Inch Air Filters 4-Inch Air Filters Custom Air Filters 5. Oct 28, 2021 · We discuss 4" vs 1" HVAC filters and considerations to keep in mind when choosing the best option for your heating system. 88x15. a dedicated air filter unit will work better, but takes up space and makes extra noise. Upgrade your air quality with top-rated one inch filters for better comfort and airflow. 88x12. These larger filters also typically come with higher MERV ratings and can capture more contaminants (e. We are looking to get a furnace and Ac through Home Depot and they supply Trane. Discussion on whether to use a 4 inch deep filter vs 1 inch deep filter, if your filter box will allow. 5x19. Oct 4, 2021 · I have the same size 1" filter and run a manometer as well. He also shares how often you should be changing each type. filterbuy. Learn more about when it's best to use a 2-inch vs 1-inch oven filter. When it comes to improving air quality, a 4-inch air filter has a clear advantage over a 1-inch filter. One thick filter can actually be cheaper than four thin ones. 75x1 9x12x1 9. 5x1 7. 5x35. Learn which type of filter is best for your needs. When it comes to air filters, the debate between 1-inch and 4-inch filters is a common one. Apr 19, 2023 · Unsure about the differences between a 1 inch vs 2 inch furnace filter? Then find out which filter is the best for your home using the guide below. Jan 4, 2023 · Firstly, 4 inches filters cover a higher range of MERV ratings, slightly overlapping with the 1-inch ones. Breathe cleaner and healthier indoor air. Dec 27, 2024 · Confused between 4 inch and 1 inch HVAC filters? Learn the differences, benefits, and which filter size is best for your system. 75 in Top, SPE-8161, Black Jan 2, 2011 · I show some 4 inch air filters that are both Merv 10. How long does a 4 inch thick furnace filter last? A three to four-inch filter can last for six to nine months. Of course they installed a fiber glass see-through filter. 75 inches thick instead of 4. Find home air filter sizes by Brand and Actual Size. So I bought a 20x25x5 inch filter but it was a bit too big to fit between the rails in the filter compartment. My filter just sits in a metal frame right in front of the the furnace. Throw one sits much more flush with the opening. I found the 3m 1900 Merv 13 had the lowest initial pressure drop new and can filter for an incredibly long time before it drops significantly. I'm worried about unfiltered air getting around the filter. The nominal size isn’t an exact measurement but it's the size that is important when you order an air filter. Aug 3, 2023 · Learn about the differences between 1 inch and 2 inch air filters, including lifespan, MERV rating, airflow restriction, and more. Just from googling it sounds like a 4 or 5 inch filter could get a higher MERV rating without restricting the airflow. 5 days ago · These standard air filter sizes often come in 1-inch, 2-inch, or 4-inch thicknesses (e. Easily purchase the right furnace and AC filters online for your home. 5x1 9. Yes, they look dirty after 6 months, but they have several times the surface area of a 1 inch filter, so a similar amount of visible darkening doesn't equate to the same amount of airflow restriction. I cant use a 4 inch high K&N air flter because it just comes up to the inside of the cowl which it seems it being restrictive. By removing allergens, dust, and pet dander, these filters make your home feel healthier and cleaner. Sep 3, 2023 · When it comes to choosing between 1 inch and 2 inch air filters for your home or business HVAC system, it's important to consider both thickness and MERV rating for optimal performance. 5x29. The thickness of the air filter ranges from 1 to 5 inches deep; some options are more common than others, and your boiler can determine what thickness it can use. Visit www. Nov 8, 2023 · When comparing the effectiveness of different filter sizes, 4-inch filters tend to be more efficient than their 1-inch counterparts. If the fit is perfect, there’s very little There is no difference between 1" and 5" filters with the same merv rating, in regards to the size of particules filtered. 6 months is considered an acceptable replacement interval, and 12 months for some models. Jan 15, 2024 · Wait, are you setting up so you can do a 4 inch filter in a filter return? Interesting. Aug 11, 2022 · Also, it’ll take more time for the heat to dissipate. Feb 16, 2022 · The 4 inch filter had vastly less restriction than the 1 inch filter when it was new, so my system was more efficient, even while I was not worrying about my filters for a year and saving money in the long term, AND filtering with a higher MERV. I think that using a 2"-thick filter instead of the 1" will be easier on the system (easier to move the air), as long as I use the same filter (Filterbuy MERV 8), since the filter's surface area will be larger. Buy discount filters for less, delivered to your door. Virtually any HVAC professional will tell you that thicker filters perform better than common 1-inch oven filters. These thick filters appeared to have the same surface area as the 1″ thick version of that filter! I say this because the 4″ thick filter had about 1/4 the number of pleats as the 1″ filter had. Another factor to consider is the filter's efficiency, measured by the MERV rating (minimum efficiency reporting value). Air Filter (Universal) 1 - 24 of 1564 results for Air Filter (Universal) Compare Sort By: Compare My house is new and it's the first time I'm replacing my filter. Feb 16, 2023 · Replacing your standard one-inch air filter with a 5-inch pleated filter can significantly improve your home's air quality. It's not recommended to do this. The main advantages of Curious on everyones opinion and facts on the difference in airflow, static pressure, & filtration levels between 1inch vs 5 inch filters. 5x9. So, if it fits your oven, then a 4-inch air cleaner is better than a 1-inch air cleaner for improving air quality. Apr 1, 2024 · Find out if using a 4-inch filter instead of a 5-inch filter can improve air quality in your home. The 4-inch thick air filter has a clear advantage over the 1-inch filter when it comes to longevity, airflow, and maximum filtration potential. Read our full guide here! Apr 4, 2022 · Nominal Size vs. 69 Camaro with a factory cowl induction air cleaner for this drag car. 5x1 8x20x1 8x24x1 8x30x1 8x35. Dec 30, 2024 · Why Do Thicker Furnace Filters Work Better? Pretty much any HVAC pro will tell you that thicker filters do a better job than the common 1-inch furnace filters. Residential filters are typically between 1-inch and 4-inch (25-102mm) in thickness. Are my thoughts correct? Nov 11, 2022 · Thicker filters have also been proven to last longer than thinner models. The 5" filter has more physical holes for air to pass through, making it easier for to push through. Jan 16, 2025 · Find out if a 4 inch thick air filter is better than a 1 inch thick one when it comes to improving indoor air quality and HVAC system efficiency. Honeywell, and some other filter makers, have a product available that uses a 1 inch header and 5 inch filter media. A thicker filter of the same MERV as a thinner one will usually have a larger face area, a lower resistance to air flow, and less pressure drop. If you try to use a four-inch air filter for a system designed for a one-inch, your efficiency will actually be worse, and components could get damaged in the process of trying to jam the four-inch into the space. The larger surface area of a 4-inch filter enables it to capture a greater volume of airborne particles, resulting in improved air quality. This allows the use a 5 inch filter in a standard return air filter grille if there is enough clearance behind the filter (no wood studs etc). First, most furnaces and air handlers are designed with 1-inch air filter slots. Also listed are the whole house air filters collections carried by Atomic Filters. We usually see four-inch or one-inch filters. The main reason is that a 1-inch filter is not equivalent to a 4-inch filter. Learn more about furnace filters and how they work. In contrast, a four-inch filter has adequate surface space to trap and filter contaminants to ensure better airflow, so a conversion from the former to the latter Tech recommended I get a 4 inch filter, but is the gap on the right too large to be effective? Can’t get it any closer due to the metal pieces at the top and bottom. com to find the best options for your home now! 4-inch filters all day long. There is a YouTube video out there comparing and it beat out even many of the thicker 4 inch filters. I have room to put in a 4 inch filter in order to get more dust and dirt out of the house. 5 in/4 in Flange ID; 2. How to Measure Your Air Filter for a Perfect Fit Accurate measurement ensures you buy the right air filter size, preventing An air filter ensures smooth airflow in an HVAC system. Few months ago I was getting quotes and the two companies I liked were quoting for 4 inch filters with a new carrier or daikin furnace. The larger filters will make the system less restrictive and put less wear on the blower motor, leading to longer Hey all, I hope this isn't an entirely stupid question but here it goes. Nov 14, 2017 · Furnace Filter Sizes Listed in Furnace Size Charts including Most Popular HVAC Filter Sizes and Brands including Lennox, Honeywell Carrier, Trion Air Bear, Goodman Trane, Rheem and Aprilaire. 5x1 5. Airflow - does it actually allow for more air to pass? The slim fit is 3. Is a 4 inch filter vs 1 inch? Well, 4-inch filters have larger pleats. My system currently has 1 inch filter. 5x24. If you measure the filter slot, and it's large enough to accommodate the thicker filter, then you can use it. Contact Us: https:// Available 1 Inch Air Filters 0. And the filters will get dirtied frequently. The furnace is a 80,000 s9xv and xr13 Ac he said it would just use the same filters as currently 1 inch. com Jul 6, 2011 · About this item 1/4-Inch NPT Standard Filter - 5 Microns Manual drain 0. The higher the rating the smaller the particles y The 1- inch and 4- inch filters cost about the same for a replacement, but you'll save money every year with the larger, more efficient filters because they don't need frequent replacement to keep your air clean. For example, a one-inch filter can easily get clogged and reduce proper airflow. Brandon shows you the difference between a 4-inch filter and a 1-inch filter. Jun 10, 2025 · How often you should change your filter depends on what size your system uses. Jun 30, 2023 · You should expect to replace your filter every three to 12 months of use, depending on the size of the filter. Learn more about how they compare. If that okay with a new furnace? Or should it be a larger filter. I'd like to get more filtration but don't want to restrict airflow too much. 38 x 4. I then found out that 4" filters can have the same MERV rating but the pressure drop isn't as severe. The installers said that a 1" filter is better than a 4" filter because static pressure, and put a 3" spacer in my filter box to install a 1" filter. I'll give you the very short answer: all other things being equal, a 4 inch filter will have something between the resistance of no filter and the resistance of a 1 inch filter. But a 4-inch filter could last longer than 6 months. 38x1 9x11. Tap here to improve your indoor air quality at Filterbuy. So that said, I've got plenty of room in my return air vent to put in a 4" filter. Aug 1, 2020 · I was at Home Depot recently and looked at some 4″ thick furnace filters they had in stock. Get a cheap 1 inch and an expensive 1 inch and put the expensive one second after the cheap one in the air flow. Quality pleated filters that trap dust and allergens effectively. The second could function normally. That means they have more surface area to catch particles, making them last 3–5 times longer than 1-inch filters. Thicker filters, known as media filters, are generally 4 to 5 inches thick as compared to the ubiquitous 1-inch filters that you can even buy in grocery stores. Nov 21, 2017 · Find the right AC or furnace filter for your HVAC system. 5x1 8x36x1 9x11x1 9x11. These filters are not only less restrictive for your system, but they last a My furnace guy recommends using the cheapest pleated filters, he says the fiberglass ones don't trap enough dust, but the expensive super-pleated ones restrict air flow too much. Is it just me, or is the version with one thick filter attached to the back of the 20-inch box fan a much better design? Because the thick filters (four or five inches deep) allow more airflow than the thin ones, you only need one instead of four. The actual size is the filter's precise dimensions, which are typically smaller than Mar 6, 2025 · Consumer Reports highlights the best air filters for your central air conditioning system and furnace to clean the air in your home. 25x1 6x14x1 6x30x1 6. 44 (Actual Size) Accumulair® 1-inch MERV 8 Replacement Filter $7. Dec 30, 2024 · 16x25x4 furnace filters are also known as media filters and last significantly longer than your average 1-inch filter. With a 20x25x4 air filter, homeowners: Have better heating and air conditioning. 4 Inch Filter A four-inch filter has larger pleats, which let air pass through easily. Dec 1, 2023 · 0 What would be the issue if I quintupled the furnace filters (16x25x1) MERV8 instead of installing the regular 5-inch (16x25x5) MERV8 in the filtration box? I'm finding the cost savings is considerably less with 5 1-inch filters versus a single 5-inch filter. Feb 21, 2023 · To put it into perspective, a 1-inch air filter may need to be changed every month, while a 4-inch air filter can last up to six months. The size matters to prevent bypassing airflow. Air Filters, Furnace Filters, Ac Filter and Air Conditional Filters are all the same filters. Need a 4-inch filter? Get deep-pleat HVAC air filters designed to last longer and trap more particles. Air filters in an HVAC system have two purposes – to maintain system performance and to improve indoor air quality (IAQ). , pet dander, smoke, allergens, and bacteria) than a 1-inch filter. Sep 9, 2017 · Listed in the chart below are the standard size 1 inch, 2 inch and 4 inch depth air conditioner filters for your AC, Furnace, HVAC at Atomic Filters. 1-16 of 398 results for "4 inch inlet air filter" Results Check each product page for other buying options. Learn about MERV ratings and how they affect air filtration. While a 4-inch-thick filter is more efficient than a 1-inch filter, the right size depends on your furnace. I am more worried about the quality of the air then anything else. If the 4 inch filter fits, keep using it as it has a bit more filter area and is a more common size. Oct 4, 2023 · Make sure you are using the proper filter for your furnace. Choose from a full range of 1 inch air filters for home HVAC and furnace units. Why Does Furnace Filter Thickness Matter? Learn more at Filterbuy. , a 16x25x1 filter). Mar 23, 2023 · When it comes to improving air quality, a 4-inch furnace filter is better than a 1-inch furnace filter. Thicker filters with more media can absorb more pollutants, meaning a 5-inch filter will need fewer replacements than a 1-inch filter. Amazon. Actual Size: How are They Different? The nominal size of an air filter is the standardized size used for labeling and marketing, which makes it easy to identify compatible filters. 5-Ounce polycarbonate bowl with guard 49 CFM › See more product details Report an issue with this product or seller ARO P39124-600-VS Air Filter-Regulator Piggyback, 1/4" NPT - 150 psi Max Inlet Next set of slides Previous page 0:20 Jun 3, 2025 · For example, most 1-inch MERV filters with a 13 rating are denser and restrict airflow a lot more than 2-inch and 4-inch MERV 13 filters. You might need to have your system modified to accommodate a thicker filter, but the $300 to $600 it will cost is a good investment compared with having to replace the blower, entire furnace or the outside . For 1-inch-thick filters, three months is the usual recommendation. One of them requires having a four inch air filter cassette and the other requires only a one inch filt The standard Corsi Rosenthal box consists of four thin filters. Jun 3, 2025 · It covers 1-inch vs 2-inch vs 4-inch furnace filters regarding how well they work, how often they must be replaced, their cost and other important areas to consider. Most HVAC technicians recommend changing 1-inch air filters every 30 days, while 4-inch filters can be changed every 3-6 months. Learn how 4-inch filters can improve your air quality better than 1-inch filters by trapping more debris without clogging up as quickly. While a 4-inch filter may cost more upfront, it can provide better air quality and a longer lifespan than a 1-inch filter. We have a 1 inch filter and I change it about every 2-3 months. Two-inch filters also exist, but they’re not common. 625 in (67 mm) Height; 6 in (152 mm) Base; 4. Learn more about 1 vs 2 vs 4 inch oven filters. 13x1 6x6x1 6x10x1 6x12x1 6x12. Oct 21, 2024 · I’ve spoken with many people that are dead set on using the thickest air filters that they can use in their home’s furnace system. 4 inch is best, 2 inch is better than a 1 inch. com: 4 inch air filterSpectre Universal Clamp-On Air Filter: High Performance, Washable Filter: Round Reverse Tapered; 3 in/3. Jun 28, 2022 · Because it is four times as thick as a 1-inch filter, it has a much greater surface area for catching household pollutants. These are widely available. Identify compatible 1-inch, 2-inch, and 4-inch filters for any manufacturer and air filter size. Buy the best four inch furnace & HVAC air conditioner filters for sale online. Nov 12, 2024 · When it comes to HVAC filters, homeowners often wonder whether a 1-inch filter or a 4-inch filter is better for their system and air quality. A 1 or 2-inch might need to be replaced every month. So the question is, Can I use 16x25x4 instead of 16x25x5 air filter? Turns out, I can use 16x25x4 instead of 16x25x5. Reliable performance, fast delivery. Find out which type is more efficient, cost-effective, and compatible with your HVAC system. Sep 3, 2023 · A 4-inch thick air filter has an advantage over 1-inch filters when it comes to improving air quality in your home. Read more What Can I Use Instead Of R22? 6 Top Alternatives There are several compelling reasons to adhere to the specified filter size. The guy rolled out the filter material and it was one of the longest. Learn what HVAC air filter nominal and actual sizes mean, why they matter, and how to buy the right size air filter for your system. Here are two keys to consider before we go further. 4 Inch Air Filters are an excellent choice if you're looking for a quick and simple solution to enhance the air quality in your living space. This is much more likely if the filter is 1” thick than if it’s thicker (2” is common, and you can get 4-5”), since thicker filters have much more surface area, which decreases the I've long thought that a two-filter wedge design is likely one optimum for capital cost + filter cost. Mar 4, 2025 · Discover the best HVAC filters for your Phoenix home! Compare 4-inch vs 1-inch filters and find out which option provides superior air quality and efficiency. 88x1 7. Filters are available in a wide range of efficiencies for removing particles from coarse dust and debris through bacteria and viruses. g. In this article, we'll explore the differences between 1-inch and 4-inch filters, as well as the importance of MERV ratings. They last longer let them load up but you have so much more surface area you can get a pretty high-efficiency filter and not worry about static pressure drop through the filter causing problems with your system. There is significantly more surface area on a 4 inch filter than a 1 inch which allows for greater dust filtration and being that there is more surface area, the air can move past easier. If it fits your oven, then a 4-inch air cleaner is better than a 1-inch air cleaner when it comes to improving air quality. Speaking of getting dirtied fast, here’s a look at the clean vs dirty 1-inch air filter- Size plays a significant role in determining how often you should replace your furnace filter. As a 4-inch filter isn’t much thinner than a 5-inch filter, it can fit easily. With a 4” filter, you will get at least an 8 MERV rating. 77 / Filter View Details Jan 22, 2024 · When it comes to oven filters, efficiency depends on size. You can double-check this by measuring the two different pressures. There is a difference in static pressure between the two. rct kxd kwmk epqwmaa etruo jfgt qxx dfkyk vzxfly mjs