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Serving Northern California Since 1946

Serving Northern California Since 1946


DeHart Plumbing, Heating, and Air Inc. Blog

“Is My HVAC Air Filter Protecting My Indoor Air Quality?”


The short answer to this is, “No.”

It’s not that the standard HVAC air filter hurts your indoor air quality. In fact, it does help a little. However, it’s not doing much to protect your indoor air quality, because that is not its purpose.

The air filter that comes standard with your HVAC system is actually in place to protect the system itself. It’s placed on the intake side, where your HVAC system draws in air. This prevents the system from sucking in dirt, dust, and other debris that can build up on its components and do the system harm. While it’s a very important component, it won’t do a whole lot to protect or help your indoor air quality in a significant way.

What will, then? A whole-house air purification system.

The Power of Whole-Home Air Purification

Even prior to the pandemic we’re currently still facing, homeowners were seeking out ways to breathe the best quality air possible within their homes. This can be reason enough to look into whole-home air purification. But you should also watch for these signs, which can be easily resolved with the right air purifier:

  • Mold and Mildew Growth
  • Dirty Ducts
  • Stuffy, Stale, or Smelly Air
  • Dust and Particles Visibly Floating in the Air
  • Allergy and Asthma Symptom Flare-Ups

Of course, the best way to figure out whether or not a whole-house air purifier will benefit you is to reach out to our professionals for guidance.

In the meantime, it is possible to buy small, portable air purifiers to use inside your home. They will have a little impact on your indoor air quality, at the very least. However, if you want to achieve comprehensive results then you’ll want to reach out to our team to see what’s best for your home’s specific needs. A whole-house air purifier is:


Sure, portable systems are relatively affordable, but one portable air purifier can typically only handle one average-sized bedroom. This means you’d have to invest in multiple systems to get results throughout your whole home. This doesn’t seem very cost-efficient, right? That’s because it’s not!

A whole-home system can be installed directly into your ductwork and addresses your entire home. This makes the system far more cost-effective than getting several portable systems. In addition, this saves space.

When you have cleaner air in your home, you won’t have to change the HVAC air filters as much either. While they’re not for your indoor air quality, having better indoor air quality will lead to less wear and tear for them.


As we mentioned above, a whole-home air purifier can be installed directly into your HVAC system’s air ducts. This means there’s no need to worry about space being taken up by smaller units or about the noise associated with all these various systems.

In addition, you will have complete and uniform indoor air quality throughout your entire household 24/7. Plus, while a whole-home air purifier can’t mitigate serious mold infestations (a UV air purifier can help!) the use of an air purifier can help keep this problem from occurring to begin with.

To start improving your Modesto, CA indoor air quality, get in touch with DeHart Plumbing, Heating, and Air Inc. today!

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