What Makes HEPA Filters So Effective?

HEPA air purifier

As a responsible homeowner, you know that air filtration is an important part of your home heating and home cooling systems.

That’s because your air filter is responsible for keeping harmful pollutants from entering your home (and your lungs), such as:

  • Dirt.
  • Dust.
  • Debris.
  • Insect waste.

So you do your best to maintain a clean air filter all year long.

However, there’s a filtration option that’s more powerful and effective than the filter which came with your air conditioner or furnace.

And that’s a HEPA filter from Anchor ClimateCare.

What is a HEPA filter, exactly?

HEPA stands for High Efficiency Particulate Air. It’s designed to capture the tiniest of particles.

HEPA isn’t just a fancy term, either. Certain criteria must be met before an air filter can earn its HEPA designation:

  • 97% of all pollutants must be trapped.
  • Anything that’s 0.3 microns (μm) must be collected.

In case you’re wondering, 1 inch equals 25,400 μm.

Now, think about that last bullet point for a moment. Here’s a list of things which 0.3 microns or bigger in size:

  • Pollen and mold sports: 7 μm.
  • Dust: 3 μm.
  • Hairspray: 3 μm.
  • Cooking smoke: 0.3 μm.
  • Human hair: 40 μm.
  • Grain of sand: 100 μm.

Remember, those are things which are BIGGER than 0.3 μm.

So you can imagine just how small the particles are which a HEPA filter will trap for you.

How does a HEPA filter work?

Traditional filters are sometimes known as “single stage filters.” They improve indoor air quality by collecting as much as it can.

HEPA filters are sometimes referred to as “three stage filters”, because there are 3 components to it:

  • Intercept: Large particles are collected in a pre-filter.
  • Impact: Smaller particles are collected in the HEPA filter itself.
  • Diffuse: A VOC (Volatile Organic Compound) filter gets rid of any gases or odours.

Once a traditional filter is “full”, it loses its effectiveness. If it’s not cleaned or replaced quickly, harmful pollutants can slip by and enter your duct work.

HEPA filters do need to be changed every so often too. But their unique design ensures more particles – and smaller particles – are caught.

HEPA filter illustration

Where are HEPA filters used?

HEPA filter technology originated in World War II. Soldiers used them to remove particles which could damage their lungs.

Since then, many homes and businesses in Central Ottawa, Embrun, and surrounding areas rely on HEPA filters:

  • Hospitals.
  • Kitchens and restaurants.
  • Nail salons.
  • Office buildings.
  • Schools.

Anyplace where air quality is vitally important should definitely consider investing in a HEPA filter.

What are the benefits for you?

In addition to providing your home with incredibly clean air, HEPA filters offer other advantages:

  • Allergy relief.
  • Less skin irritation.
  • Improved breathing for anyone with respiratory issues.
  • Better sleep.

In fact, some everyday items you use (vacuum cleaner, car air filters) may already have HEPA filtration technology in place.

How can you bring a HEPA filter into your home?


HEPA filters from Anchor ClimateCare are designed to work with your ClimateCare products:

  • Our experts can help you select the right HEPA filter for you.
  • Our installers will set it up for you.
  • Our technicians will inspect and replace it for you with a 25% discount on an ongoing ACE Protection Plan.

For more information, contact us with your questions, comments, or to request a FREE quote. We’ll get back to you quickly with the answers and guidance you need.