Electrostatic Air Filter vs. HEPA: Which One Should You Choose?
When it comes to air filtration, two popular options are electrostatic air filters and HEPA filters. Both technologies have their pros and cons, and choosing between them can be confusing. In this blog, we'll compare electrostatic air filters and HEPA filters and explore their differences to help you make an informed decision.
What are Electrostatic Air Filters?
The main idea of electrostatic filters is to utilize static electricity to attract and trap particles on the charged fibres and carbon paths. So instead of getting pulled through and being blocked by filter material like standard filters, the particles are attracted to the filter media.
You will encounter two standard electrostatic technologies when searching the different types of electrostatic filters. In this article, we will be comparing the two:
- Electrostatic Ionized Technology
- Electrostatic Polarized Technology
Unlike the more common ionizing technology found in most electrostatic air filters, polarized-media air cleaners do an exceptional job of removing sub-micron (<1 micron in size) particles without the efficiency loss associated with precipitating electronic air cleaners. In addition, as each particle attaches itself to the fibre strands, it, in turn, becomes part of the collection process, thereby increasing the effectiveness of the filter as it loads. Polarized media also produces no ozone - making the filter better, not only in performance but for our health.
Pros of Electrostatic Polarized Air Filters:
- Polarized-media air cleaners do an exceptional job of removing sub-micron (<1 micron in size) particles without the efficiency loss associated with precipitating electronic air cleaners
- Increase HVAC system efficiency
- They're relatively inexpensive compared to HEPA filters.
What are HEPA Filters?
HEPA filters are made of tightly woven fibres that trap airborne particles as air passes through. They're designed to capture particles as small as 0.3 microns, including dust, pollen, pet dander, and even viruses.
HEPA filters are designed to remove 99.97% of particles that are 0.3 microns or larger in size; This includes particles such as smoke, bacteria, and viruses. Since HEPA filters are so efficient, they cause a higher pressure drop than filters with MERV ratings. Given their high efficiency, HEPA filters are best suited for rooms where air quality is a concern, such as in hospitals, laboratories, and cleanrooms. Many HVAC systems are not designed for HEPA filters, but these filters are available as portable air cleaners or vacuum cleaners. They can be used in homes to improve indoor air quality, particularly for people with allergies or respiratory issues.
Pros of HEPA HVAC Filters:
They're highly effective at capturing airborne particles, including viruses and bacteria.
They're ideal for people with allergies or respiratory issues.
Cons of HEPA HVAC Filters:
- Not as cost-effective.
- Decreased HVAC airflow.
Electrostatic Air Filter vs. HEPA: Which is Better?
Both electrostatic air filters and HEPA filters have their strengths and weaknesses. The choice between the two will depend on your specific needs. However, the Blade Air electrostatic polarized filters are the best option for businesses looking for energy savings and easier maintenance while maintaining better filtration than traditional filters. You can improve indoor air quality while lowering energy consumption by up to 75% and reducing maintenance costs by up to 35%. Utilizing active polarization fields to bind the micro-particulates together that standard filters let pass, capture and kill viruses, bacteria, mold, and removes VOCs and other harmful particulates. This field binds the micro-particulates together, deactivates the viruses/bacteria and traps them in the filter.