The Symptoms of an Old and Dirty Filter
When too much dust or hair collects in an HVAC filter, it's probably time to change it. But that's not something all homeowners are comfortable waiting to have happen. Thankfully numerous warning signs show it's time to change an HVAC filter at home.
In this article, air conditioning experts offer insight into the common symptoms of a dirty air filter, the benefits of replacing it, and how it can benefit homeowners at all times.
Signs the Filter Needs Replacing

The most surefire way is to check the filter. If it's dirty and dusty and clogs constantly, it needs to be replaced. If the filter is not easily accessible, other symptoms can indicate it's time to change the filter.
One of the first signs is the smell. If the smell of dust shows up when the heater or AC is running, it's time to change the filter. Another sign is finding excessive dust around the home, especially around the vents. Finally, if it's not known when the filter was last changed, it's definitely a good time to change it!
The Upsides To Changing a Filter
When the HVAC filter is replaced there are quite a few upsides. First and foremost, the air quality in the home will be improved. Since filters catch dust, hair, and debris, replacing it will allow for clean air to circulate through the home. This improves the health of the household and even provides better sleep.
Changing the filter will also help the heating and cooling systems last longer by keeping them clean, preventing breakdowns and build-ups. Changing a filter also keeps energy costs lower by allowing the unit to work within it's expected range. This reduces stress on the unit and keeps its energy usage within the expected range.
How Frequently To Change an HVAC Filter

There are many different recommendations on how often to change an HVAC filter, from one month to 6. In reality, it comes down to space, the amount of use it gets, the number of people, the number of pets, and the type of filter used.
Most filters will come with a recommended life span on them. It's usually a good idea to change the filter on or before that date. However, a few things can cause a filter to need more frequent replacement. For example, a household of three with a cat and two dogs will need to change the filter significantly more often than a single person with a goldfish due to dandruff and hair.
Other considerations include the time of year: if there isn't an AC, the furnace filter can probably sit all summer. On the other hand, it may need to be changed monthly at a minimum during the winter. There are also longer-lasting, more heavy-duty filters available that may withstand longer use, but beware: this could cause the system to work harder, shortening its life span.
As a general rule, in mild climates without excessive use, filters should still be changed every three months, and in places with heavy use or heavy traffic, at least once a month. It's always best to play it on the safe side with filters. Not only will it keep energy costs low and improve the life of the equipment, but it will also keep the air clean and safe instead of dusty and dirty.
Whatever option one chooses, it's always best to call a professional.
About Daniels Plumbing Heating and Air Conditioning
Daniels Plumbing Heating and Air Conditioning serve the Albuquerque area. With a strong commitment to providing the best service in New Mexico, Daniels has weekly education events to ensure the best service. Providing 24/7 emergency service, Daniels is committed to leaving the home as clean as when they arrived.