Mobile Home Furnace Filters: A Guide to Types, Sizes & Replacing

Mobile home furnace filters are vital for maintaining a clean and healthy living environment. They work hard to trap dust, pollen, pet dander, and other airborne contaminants, keeping them from circulating throughout your home. By doing so, these filters improve indoor air quality and protect your HVAC system. 

Mobile Home Furnace Filters:

A well-maintained filter ensures your furnace runs efficiently, reduces energy consumption, and extends the life of your system. So, investing in the right filter and taking care of it is a smart move for your well-being and wallet! In this guide, we’ll dive into mobile home furnace filters, helping you choose the right one and maintain it for a healthy, cozy living space.

Types of Mobile Home Furnace Filters

Ready to explore the world of furnace filters? Let’s jump right in! There are four main types of filters, each with its own perks and quirks. Understanding their differences will help you pick the perfect one for your mobile home.

1. Fiberglass Filters

First up, we have fiberglass filters. These are the most basic and budget-friendly options. Made of disposable, spun fiberglass, they’re designed to catch large dust particles. But remember, they won’t catch smaller particles like pollen or pet dander, so you’ll need to replace them more often.

2. Pleated Filters

Next, meet pleated filters. These filters are a step up from fiberglass. Made from folded polyester or cotton, they’re better at capturing smaller particles. With a higher price tag comes better air quality, which lasts longer too!

3. Electrostatic Filters

Now, let’s talk about electrostatic filters. These clever filters use static electricity to attract and trap particles. They come in two flavors: washable and disposable. Washable ones can be cleaned and reused, while disposables need to be replaced periodically. Either way, they do a great job of keeping your air clean.

4. HEPA Filters

Last but not least, say hello to HEPA filters. These are the cream of the crop when it comes to trapping airborne contaminants. With the highest efficiency rating, they can capture particles as small as 0.3 microns! Although they can be pricey, they’re a fantastic choice for allergy sufferers or those looking for top-notch air quality.

MERV Rating

Alright, let’s talk MERV ratings! No, we’re not chatting about a cool new superhero, but it’s still pretty crucial regarding furnace filters. MERV stands for Minimum Efficiency Reporting Value, which tells us how effectively a filter captures particles of different sizes.

MERV ratings range from 1 to 16. Picture it like this: the higher the number, the more particles the filter can catch, and the cleaner your air will be. Simple, right?

So, how do you choose the best MERV rating for your mobile home? It depends on your needs. A lower MERV rating (1-4) will do the trick if you want basic protection and a budget-friendly option. But if you have allergies or want to catch smaller particles like pollen and pet dander, you’ll want a filter with a higher MERV rating (5-12).

Remember that filters with the highest MERV ratings (13-16) might not best fit every mobile home HVAC system. These ultra-efficient filters can sometimes restrict airflow, making your furnace work harder. Before going all-in on a high MERV filter, check your system’s guidelines to ensure compatibility.

Filter Sizes

Choosing the right furnace filter is like finding the perfect pair of shoes – size matters! Getting the correct filter size is crucial for your mobile home’s HVAC system to work magic and clean your air.

So, how do you find the perfect fit? First, take a look at your existing filter. Most filters have their dimensions printed on the frame. You’ll see three numbers, like 16x25x1, representing the length, width, and thickness in inches.

If you can’t find the dimensions on your current filter, don’t worry – just grab a tape measure and measure it yourself. Remember to jot down the length, width, and thickness; you’re ready.

Once you know your filter’s size, you can shop with confidence. Furnace filters come in a variety of standard sizes, but if you can’t find the exact match, you can always get a custom-made filter to ensure a perfect fit.

Replacement Frequency

Changing your furnace filter is like getting a haircut – you’ve got to do it regularly to keep things looking and feeling great! But how often should you replace your filter? Well, it depends on a few factors, like the filter you’re using and your home’s air quality.

Let’s break it down by filter type:

  1. Fiberglass filters: These basic filters need a little more TLC. Plan to replace them every 30 days to keep your air fresh and clean.
  2. Pleated filters: These hardworking filters can go a bit longer between changes. Swap them out every 60 to 90 days to keep your HVAC system in tip-top shape.
  3. Electrostatic filters: For washable versions, give them a good cleaning every 30 to 90 days. If you’re using disposable electrostatic filters, replace them every 90 days.
  4. HEPA filters: These high-efficiency champs can last 6 to 12 months before needing a replacement. Impressive, right?

Of course, these are just general guidelines. If you have pets, smoke indoors, or have allergy sufferers in your home, you might need to replace your filter more often. Keep an eye on your filter and replace it when it looks dirty or clogged.

Replacing Mobile Home Furnace Filters

Replacing a filter on a mobile home furnace is a simple process that you can do yourself. Just follow these easy steps:

  1. Turn off the furnace: Before you start, switch off your furnace for safety reasons. You can usually find the power switch on the side of the furnace or the main electrical panel.
  2. Locate the filter: The filter is typically housed in a slot or compartment near the air return duct, close to the blower motor. Look for a panel or door you can easily remove to access the filter.
  3. Remove the old filter: Carefully slide the old filter out of its slot. Be gentle, as it may be covered in dust and debris. You don’t want to release all that dirt into your home’s air!
  4. Check the filter size: Before disposing of the old filter, note its dimensions (length, width, and thickness). These should be printed on the filter frame. If not, measure the old filter with a tape measure to ensure you purchase the correct size replacement.
  5. Insert the new filter: Make sure you have the right size and type of filter for your furnace. Pay attention to the airflow direction arrows printed on the filter frame. When you slide the new filter into place, these arrows should point toward the furnace or blower motor.
  6. Secure the filter: Replace the panel or door covering the filter compartment, ensuring it’s properly secured.
  7. Turn the furnace back on: Once the new filter is in place, turn the furnace power back on and enjoy your fresh, clean air!

Remember to check your furnace filter regularly and replace or clean it as needed to maintain good air quality and keep your HVAC system running efficiently.


Let’s talk about keeping your furnace filter in tip-top shape! Like you take care of your favorite houseplants, your filter also needs a little love. Regular maintenance is the key to a healthy HVAC system and fresh, clean air in your mobile home.

First, make it a habit to check your filter every month. Take a quick peek to see if it’s dirty or clogged. If it is, it’s time to clean or replace it. No one wants a dusty filter slowing down their HVAC system, right?

If you use a washable filter, gently clean it with water and mild detergent. Let it dry completely before popping it back into your furnace. This will keep your filter working like a champ and save you money in the long run.

Besides checking and cleaning, keeping track of when you last replaced your filter is essential. Write the date on the filter frame or set a reminder on your phone – whatever works for you! This way, you’ll know when it’s time for a fresh filter.


Well, there you have it – the ultimate guide to mobile home furnace filters! Now you’re a filter pro, equipped with all the knowledge you need to choose the right filter, keep it well-maintained, and breathe easy in your cozy mobile home. Remember, regular filter checks and replacements are critical to a healthy HVAC system and excellent air quality. So give your furnace filter some love, and enjoy the fresh, clean air in your happy home!