Mini split replacement filters for my heat pump are expensive, and the factory filters are a little too fine for the kind of dust and daily use they see here. So instead of buying another set of disposable replacements, I rebuilt them.
This is one of those small frugal fixes that makes a lot of sense over time. The original plastic filters work, but they tend to load up quickly and hold dust tightly. These rebuilt metal mesh filters should be easier to vacuum and maintain in place.
I was able to reuse the frame concept, cut down the new filter material, and shape it to fit the unit. They are a little tighter to install than the originals, but they fit and they should be much more durable long term.
Why I made replacement filters for this mini split
Most mini split systems come with washable, reusable intake filters from the factory. These are designed to be rinsed periodically and reused, which works well for a number of years.
However, after long term use those original filters can begin to break down. The plastic frames can crack, and the filter media can eventually become clogged or coated with residue that no longer washes out well. When that happens, airflow and efficiency can start to suffer.
Normally the simple solution would be to replace the filters. The challenge is that many mini split manufacturers do not sell replacement filters for older units. In my case, replacements are not available for this model.
To solve that problem, I used a washable filter material that is commonly used in air filter applications. The material can be trimmed to size and placed back into the original frame, creating a reusable filter that can be vacuumed or rinsed just like the original.
This approach restores proper airflow, keeps dust and debris out of the unit, and costs roughly $10 in material to replace both filters instead of relying on replacements that may cost around $60 or may not be available at all.
It is simply a practical solution for keeping an older system working well when factory parts are no longer offered.
Original and rebuilt filters installed
This photo shows the original plastic filter on one side and the rebuilt metal mesh filter on the other side so you can clearly see the difference in material and fit.
Old filters and rebuilt filters side by side
This comparison makes it easier to see how different the factory filters are from the rebuilt version. The original filters use a very fine plastic mesh. The rebuilt version uses a washable metal mesh inside a reshaped frame.
Finished rebuilt filters
These are the finished metal mesh filters before installation. I cut them down, reused the frame idea, and shaped them to fit the heat pump openings.
Why I did this
The main reason is simple. I want something reusable, durable, and easier to maintain.
- The factory filters are very fine and tend to clog faster
- The metal mesh is easier to vacuum clean
- The rebuilt filters should last much longer
- It saves money over repeatedly replacing flimsy factory filters
Because the metal mesh is more open than the original material, my plan is to leave these in place and simply vacuum them during regular cleaning. If they ever get heavily loaded, I can still remove them and wash them.
A practical frugal off grid fix
This is a small example of how I tend to approach systems on the homestead. If something can be repaired, adapted, or rebuilt into a more durable version, that often makes more sense than constantly buying replacements.
It is not always about doing things the factory way. Sometimes it is about making a system easier to live with long term using the materials you have available.
If you are trying to build a more durable off grid life, these small improvements matter. Reusable parts, easier maintenance, and lower long term replacement costs all add up.
If you like my frugal lifestyle, my off-grid homesteading videos teach more than simply how to build a sustainable homestead. The systems I use teach how to build more structure and less pressure over time, and that applies to everyone.
You can watch my videos here: Frugal Off Grid on YouTube
If you want more information on off-grid living, start here: Start Here
2 comments
Thanks Kathy. My old filters broke and after washing they started to gum up more. When I tried to order replacements, they don’t make them. So I made my own which will clean easier and plug less quickly.
You are my “go to” for homesteading just for these kind of practical tips. Thank you for sharing your journey with us.