When was the last time you changed the air filter in your HVAC system? If you can’t remember, it’s probably overdue.
Filters in this area should be changed or cleaned on a monthly basis. Air filters remove dust and dirt particles from the air and prevent them from clogging the mechanical components (the most expensive parts) of your HVAC system. A dirty filter will affect the HVAC system’s efficiency, forcing it to run longer and harder to keep up with the home’s cooling needs. This will not only shorten the life of the system, but it will also increase your monthly utility bills DRAMATICALLY.
Home inspectors in Arizona are required to report on filter condition and when performing home inspections I cant tell you how many times I find filters that are real nasty or missing.
This is an indication that the unit is likely not maintained properly.
Remember if you have a washable filter to allow it to dry before you re-install it.
There are lots of filters on the market in all different price ranges.
Many experts agree that a inexpensive paper filter changed monthly works better than an expensive fiber filter changed or cleaned every 2-3 months.