You normally should look for a filter that can remove 75% to 85% of particulates down to as small as 1 to 1.5 microns. Keep in mind, the reason you cannot remove particles any smaller is because in most cases you would need a HEPA filter to attain these efficiencies…requiring too much strain on your current system, unless you made a significant financial investment into a system that was powerful enough to handle HEPA. The reason for this is that a HEPA filter is very thick and offers a great deal of resistance to the air movement.
Along these lines, you should be careful of filters with a pre-filter and final filter, as the airflow may be greatly reduced. A good filter can remove up to 50% of all the dust and particles circulating through your ducting. In shopping for a filter, you should always ask what the airflow resistance is when the filter is clean and what it is when the filter is dirty. The clean airflow resistance should be between 0.1 to 0.5. If it is close to 1.0 or higher, it will be too much resistance for your HVAC system.
— Source: AllergyBuyersClub.com
You save by changing your filter at properly timed intervals, because efficient air flow results in less energy usage and less wear and tear on equipment. According to NAFA (National Air Filtration Association), a clogged filter can cost up to $26 per month in energy costs.
Research shows that dirt build-up reduces airflow and decreases the efficiency of your HVAC system, resulting in increased operating costs.
Standard 1” filters consist of media in a cardboard frame. They are cheap, but you get what you pay for. These filters usually have to be changed every other month at the maximum.
Forgetting to change the filter is the leading cause of heating and cooling system problems and expensive repairs. The Whole House Filtration System will help to protect your HVAC system in several vital ways. The system helps to increase the efficiency of your system, therefore reducing the wear and tear on system parts. The reduced wear and tear, in turn, reduces the need for maintenance on your system. In the long term, the Whole House Filtration System helps to reduce maintenance costs and extend the life of your heating and cooling system.
The Whole House Filtration System carries a renewable lifetime warranty. The original purchaser of the system may extend this warranty for successive additional year(s) by purchasing and using during each year genuine system filter cartridges.