Types of Air Filters
It's important that we note here that not all filters are made equal. Your choice of air conditioner filter can make a big difference to the quality of the air in your home. Here at Metropolitan, we are familiar with all types of air filters. Among them are:
A High Efficiency Particulate Air filter, or HEPA filter, is placed on the return air grille panel of ducted air conditioning systems. They are widely considered to be one of the most effective filters for improving air quality.
HEPA filters can purify your air from mould, bacteria, dust and more. This makes them a great option for people who suffer from respiratory problems or allergies.
In a residential setting, you will need to replace them every few years; possibly even more frequently if you use your air con a lot.
As the name indicates, UV filters use ultraviolet light to kill bacteria, viruses and mould spores. They use a UV lamp set to a germicidal wavelength to very effectively purify your HVAC air by destroying harmful microorganisms.
Though they are highly effective at dealing with these airborne contaminants, UV filters aren't useful for removing common allergens like dust. They're also significantly more expensive to install. The UV radiation that they use can also react with oxygen to produce ozone which can be hazardous. They're often found in combination with HEPA filters to form a large and very effective filtration system.
Depending on the brand and model of UV filter that you use, the lamps typically need replacing every 12 months.
and other particles. These are great options for those who want to combat airborne allergens more cost-effectively.
Electrostatic air filters are available in reusable or disposable options, giving you the option to wash or replace them when they need changing. Compared to other filters, however, electrostatic filters are not as effective at removing larger pollutants and may not be effective enough for asthma sufferers.
If you’re seeking a more environmentally conscious option, washable air filters are a great way to go. The material allows you to simply wash the filter and reuse it time and time again.
Though they’re not as effective as other filter options, washable filters are great for homes where air quality is less of a concern. To keep reusing these filters, you need to follow the instructions so they continue to work as intended.
Spun Glass Filters
Spun glass filters are one of the most common aircon filters on the market. They are cost-effective, readily available, and used in many air conditioners.
It’s worth noting, however, that spun glass filters aren't the most effective at removing contaminants from the air. They can quickly become clogged which can negatively impact the airflow and efficiency of your air con system.
Pleated filters are available in cotton or polyester options. They’re exceptional at capturing debris but less capable of providing air filtration. They're also great for dampening the sound of your air con!
The nature of pleated filters, however, means that your air conditioner is forced to work harder to pull air through the unit and so can make it less efficient.
Pleated air filters are at the more affordable end of the price range. They’re a good option for people concerned about the quality of air in their homes, but who don't suffer any major respiratory illnesses. You can find reusable and disposable pleated filters too.