Your Ultimate Buying Guide For HVAC Air Filters

‘Tis the season to be ready and on-the-alert as you welcome the upcoming seasonal changes with arms wide open, and eyes peeled for replacement air filters for your HVAC. What’s amazing is that this industry has been seeing a number of advancements so that air filter functions have broadened significantly. In parallel to this, installation and filter replacement is achievable today with much more ease.

Whether you’re eyeing a 19x19x1 Air Filter from Filter King, or any size that’s a perfect fit for your HVAC at home or in the office, this buying guide will help you understand what to take note of regarding air filters. 

Air Filter Buying Guide: 3 Main Air Filter Types

1. Fiberglass Air Filter 

Considered as one of the most economical types of filters, fibreglass air filters have the basic purpose of acting as a sieve against dust, debris, and similar particles. Their main and sole responsibility is to trap large-sized contaminants. 

It’s important to remember that fibreglass air filters are limited to visible particles. This implies that it has no function whatsoever when it comes to being able to improve air quality as a whole. So, it’s recommended that should you choose this, you are to have a secondary air-purifying machine. 

2. Pleated And Polyester Filters 

Pleated and polyester filters, when compared to their fibreglass cousin, have a broader surface area. Although they’re similar to fibreglass air filters, what makes them distinct is their high resistance to airflow. High-resistance against airflow simply means that should the air flow through at a rapid rate while carrying contaminants, pleated and polyester filters will retain their integrity and catch said contaminants easily. 

Studies show that these are able to trap somewhere between 80% to 90% of particles that have a diameter of at least 5 microns (1 micron = 1 millionth of a meter). In addition to this, it offers better safeguarding against pollutants that cause breathing difficulties and/ or diseases. 

It’s also said to offer very strong resistance to acid— a characteristic that not all air filters have. This is among that which accounts for its tensile strength. Even when put through a maximum of 300-degrees Fahrenheit, it will remain just as sturdy and efficient. Plus, it’s got elongating properties that serve as support against corrosion and quick-tearing.

3. HEPA Filters 

High-Efficiency Particulate Air filters are mechanical in nature. Aside from ensnaring pollutants, it’s an aid against contaminants that cause allergies. HEPA filters are manufactured and then assembled so that its mesh is extremely fine yet durable. Dust mites, pet dander, pollen, smoke (from cigarettes, tobacco, etc.) are conveniently captured. 

Moreover, it rids the air of 99.97% of harmful impurities. Due to the standards that board associations across the globe have for air quality (i.e. the IOS or the International Organization for Standardization, etc.), HEPA filters have been tried, tested, and approved for their power and performance. 

It has the capacity to sift 0.3 microns. To put this into the right perspective, note that particles visible to the human eye which are 10 microns in size can enter the throat and lungs. Those that are 2.5 microns in size can still pass through the alveoli. Thus, with a filtering enhancement of up to 0.3 microns, HEPA filters will protect you and your family from inhaling almost-invisible detrimental pollutants.