Uncovering the Pros and Cons of Using Washable Furnace Filters: How It Impacts Your Furnace Filter Sizes

If you're tired of constantly buying disposable furnace filters and looking for a more eco-friendly option, washable furnace filters may seem like the perfect solution. But are they really worth the investment? In this article, we'll uncover the pros and cons of using washable furnace filters and how it can impact your furnace filter sizes.

First, we'll look at the benefits of using washable furnace filters. Not only do they reduce waste and save you money in the long run, but they're also more effective at filtering out pollutants and allergens from the air in your home. Plus, you don't have to worry about constantly replacing them, since you can simply wash and reuse the same filter multiple times.

However, there are also some drawbacks to consider. Washable filters require regular cleaning and maintenance, which can be time-consuming and may even affect the lifespan of your furnace if not done properly. And depending on the type of filter you choose, it may not be able to filter out all types of pollutants and particles, which could impact your indoor air quality.

Types of Washable Furnace Filters and Their Benefits

Washable furnace filters come in various types, each designed to fulfill specific needs. Here are some of the most popular:

Electrostatic Filters

These filters produce an electrostatic charge that attracts and traps airborne particles. They don't require any ongoing maintenance, apart from regular washing.

Pleated Filters

Pleated filters have multiple layers of filtration material, providing excellent protection against allergens, dust, and other small particles. They are highly effective but need changing more frequently than other types of filters.

Permanent Filters

Permanent filters are made of washable materials like aluminum or metal mesh. They can last for many years with proper maintenance, making them a cost-effective option in the long run.

Activated Carbon Filters

Activated carbon filters are designed to remove odors and VOCs (volatile organic compounds) from the air. They are not as effective at trapping larger particles like dust, but they are excellent for eliminating unpleasant smells and hazardous chemicals.

The benefits of using washable filters are many, from saving money in the long run to being more environmentally friendly. By choosing the right type of filter for your needs, you can enjoy clean and fresh indoor air without the added expense of disposable filters.

Maintenance and Cleaning Requirements

One advantage of washable furnace filters is that they can be reused multiple times, saving you money in the long run. However, they require regular cleaning to maintain their efficiency. To clean a washable furnace filter, you simply remove it from the furnace, rinse it with water, and let it air dry. Depending on the level of pollutants in your home, this may be required once a month or every few months. It's important to note that washing your filter too infrequently can lead to a buildup of dirt and allergens, making the filter less effective. On the other hand, washing it too frequently can cause the filter fibers to break down, reducing its lifespan. Overall, washable furnace filters require more attention than disposable filters, but can pay for themselves with proper maintenance. Before making the switch, consider your lifestyle and home environment to determine whether the additional maintenance is worth it.

Lifespan of Washable Furnace Filters

One of the major advantages of washable furnace filters is their longevity. These filters can be reused multiple times, which helps you save money in the long run. The lifespan of washable furnace filters varies depending on several factors:

  • Maintenance: Proper maintenance is critical to extend the lifespan of washable filters. Cleaning them regularly and following the manufacturer's recommendations can help keep them in good condition for longer.
  • Type of filter: The type of filter you choose will also affect its lifespan. Some filters are designed to last longer than others.
  • Environmental factors: The environment in which you live can impact the lifespan of your furnace filter. If you live in an area with high levels of pollutants or if you smoke indoors, your filter may need to be cleaned or replaced more frequently.

On average, washable furnace filters can last anywhere from six to twelve months. However, this may vary depending on the factors mentioned above. It's essential to monitor your filter's condition regularly and clean or replace it when necessary.

Remember, using a dirty or clogged filter can cause your HVAC system to work harder, leading to higher energy bills and potentially damaging your furnace. So, ensure you're using a clean and properly maintained filter to get the most out of your furnace and air conditioning system.

To conclude, the lifespan of washable furnace filters is mostly dependent on how well they're maintained and the environmental conditions they are exposed to. With proper care and regular cleaning, they can last for months, protecting your HVAC system and indoor air quality.

Air Quality Improvement Potential

Using washable furnace filters can potentially improve the air quality in your home. Traditional disposable air filters are made of materials such as fiberglass, which can only capture larger particles. Washable filters, on the other hand, can capture smaller particles, including pet dander, pollen, and dust mites. By using a washable filter, you can prevent these particles from circulating in the air and potentially causing health issues such as allergies, asthma, and respiratory problems. However, it's important to note that the effectiveness of a washable filter depends on how well it is maintained and cleaned. In addition to improving air quality, washable furnace filters are environmentally friendly since they can be reused multiple times. This means that you won't have to dispose of them as often as disposable filters, reducing the amount of waste that ends up in landfills. Overall, using a washable furnace filter can potentially improve your indoor air quality and have a positive impact on the environment. If you do decide to switch to a washable filter, be sure to properly clean and maintain it to ensure its effectiveness.

Washable Vs. Disposable Furnace Filters: A Quick Comparison

When it comes to furnace filters, there are two popular options you can choose from – washable filters and disposable filters. While washable filters have their benefits, they may not be suitable for every homeowner's need. Let's compare them to disposable filters to help you choose the right one for you.

Cost: One of the most significant differences between the two filters is their cost. Washable filters cost more upfront but will last for several years. On the other hand, disposable filters are inexpensive but need to be replaced often, which could add up over time.

Maintenance: Washable filters require regular cleaning to maintain their efficiency, and the maintenance should be done correctly to avoid damage to the filter. On the other hand, Disposable filters do not need any maintenance, and they can easily be disposed of after use.

Efficiency: Washable filters are more efficient at trapping large particles, dust, and pollen than disposable filters, primarily if they are washed regularly. However, disposable filters do a better job of trapping small particles like bacteria or mold spores, which may improve your indoor air quality.

Furnace Performance: Because washable filters are more robust and provide better airflow, they can improve your furnace's performance. On the other hand, disposable filters can restrict airflow, which can affect your furnace's efficiency.

Conclusion: Depending on your needs, either washable or disposable filters can be an excellent option. For those with allergies, washable filters may be a better choice to reduce contaminants in the air. However, if you're on a tight budget or don't want to bother with cleaning, disposable filters may be a better option. Make sure to check your furnace filter size before buying to ensure compatibility.

Conclusion: To Wash or Not to Wash?

Washable furnace filters offer many advantages, including cost-effectiveness, eco-friendliness, and convenience. They also have a longer lifespan than disposable filters and can reduce your carbon footprint. However, they do require more maintenance, may not be as effective at filtering out small particles, and may not fit all types of furnaces.

Ultimately, the decision to use a washable furnace filter depends on your individual needs and preferences. If you are looking for a low-cost, environmentally friendly option that requires minimal replacements, a washable filter might be the way to go. However, if you prioritize maximum filtration and ease of use, you may want to stick with a disposable filter.

Whichever option you choose, be sure to carefully research the appropriate furnace filter sizes for your system and regularly clean or replace your filter to maintain optimal performance and energy efficiency. Happy filtering!

Frequently Asked Question

It's important to know the size and type of furnace filter you need before replacing it. This is because different furnaces require different sizes of filters. Your brand of furnace may need an electrostatic or media filter of a particular size - so make sure to check your old filter for these details.


Replacing your filter regularly can save you money in the long run. It helps your HVAC system become more efficient, and also keeps the air quality high. So, what are the most common furnace filter sizes?


The most popular furnace filters come in the following dimensions: 10x20, 14x20, 16x24, 18x30, 12x12, 14x24, 16x25, 20x20, 12x20, 14x25, 18x18, 20x24, 12x24, 14x30, 18x20, 20x25, 12x30, 15x20, 18x24, 20x30, 12x36, 16x20, 18x25, 24x24 and 25x25. You can use your existing filter as a reference guide to find the perfect size for your furnace. The filter dimensions should be printed on its frame as length x width x height.


In conclusion, it's important to know your furnace filter size before you replace it. Doing so will improve your HVAC system's efficiency and save you money in the long run. Plus, a clean filter is key to keeping your air quality high.

When it comes to furnace filters, exact size matters. If you get a filter that is too small or too big, air will flow around it instead of through it, meaning not all of the air will be filtered. That's why it's essential to use the right size filter for your HVAC unit.


Here's what you need to know: the size of the air filter is typically listed in the big, bold font on the packaging, which is known as the nominal size. This is a rounded-up whole-number version of the actual size, which is written in the fine print on the filter's frame. That's usually 0.25'-0.5' smaller than the nominal size, and the actual measurements of the filter may vary slightly depending on the brand.


In some cases, less common sizes come true to size, meaning the nominal size is the same as the actual size. When that's the case, it's usually noted with “actual size” in parentheses on the filter's frame.


So, the verdict is in: the answer to the question 'Do furnace filters have to be exact size?' is a resounding yes! Be sure to get the right size air filter for your system to ensure it runs smoothly and that you reap all the benefits your filter has to offer.

Are you looking for the best furnace filter? Look no further! Our team of experts at This Old House Reviews have researched the top five furnace filters on Amazon to help you find the perfect one for your HVAC system. Plus, these products are available at local home centers or online retailers like Amazon.


A great furnace filter can make all the difference. It will keep your HVAC system running smoothly, potentially leading to lower electricity bills and better air quality. That's why we've taken the time to compile a list of the best furnace filters for you.


At the top of our list is the Filtrete furnace air filter. It promises to last up to three months and outperform filters made with fiberglass. Plus, it can capture 64% of airborne particles like pet dander and pollen. This filter also comes with instructions for easy installation on HVAC systems that require filters 20 by 25 by 1 inches in size.


Customers love this furnace filter. They find it easy to install, sturdy, and a great value. However, some customers have faced difficulties with Filtrete’s app.


When choosing a furnace filter, make sure to take into account its size, filtration level, and material. That way, you can get the best filter for your specific needs.

Changing or replacing your furnace filter is one of the best ways to maintain a healthy, efficient HVAC system. But you need to make sure that you're using the right filter for your system. Here's a step-by-step guide to help you pick the perfect one!


First, measure the dimensions of your existing filter. This will tell you the length, width, and depth you need. The easiest way to do this is to look at the existing filter and buy the same size.


Next, you need to choose the right MERV rating. The MERV scale ranges from 1-20 and measures the filter's effectiveness at catching particles in the air. The higher the value, the more effective the filter is at trapping particles, but it also means less airflow.


Now it's time to decide on the type of filter. There are many options available, so take some time to research the best type for your system.


Once you have everything you need, it's time to install the filter in your furnace/air handler slot. Remove the old filter to make room for the new one.


Finally, make sure to replace your filter regularly. If it clogs up with dust and particulate, it can reduce airflow and become ineffective.

Furnace air filters are essential for your heating system. You should replace your filter at least once every three months. So, how do you select the best furnace filter for your needs? Let us help you out!


Generally, furnace filters are made up of a cardboard frame, fiberglass filter, and metal mesh. These materials work together to strengthen the filter and protect your HVAC components from dust and debris. Plus, they also help improve the air quality in your home. Without a filter, your HVAC system could become dirty and its performance would suffer.


As air passes through the furnace filter, it traps and catches any contaminants. If you don't replace or clean your filter regularly, it can obstruct airflow and cause damage to your HVAC system. In most cases, you should change your furnace filters every three months. However, you may want to replace them more or less often depending on the situation.