The most expensive A/C filter is not always the best for your air conditioning system. Ask a professional which filter will work best for your system.
Do you have an odd sized filter?
Are you unsure which type of filter you should use?
Are you using the right size filters?
Do you know how often you need to change your filter?
If your filter is in the indoor machine, you may have an odd sized filter.
There are many types, but washable, poly, and pleated are the most common.
Sometimes we find that a filter is half an inch too short, allowing particles to pass by.
This depends a number of things, like how well your house is insulated, if you have pets—how many pets and the kind of pets— and if you have people coming in and out of the house all day. Pleated filters last up to 90 days, but some people have to change these filters every few weeks.