A good filter is the key to good air quality and a long-lasting HVAC system. There are many discount filters available for HVAC systems that require a filter of 18x20x1”. The standard fiberglass filters must be changed once a month and only have a MERV 4 rating. They are the economical choice, however, and 12 come in every package.

Pleated filters are up to 30 times more efficient than fiberglass and also reduce the strain on HVAC systems. The electrostatic charge added to the synthetic media also allows it to attract more dust. A pleated filter which is rated MERV 8 will remove lint, dust, mold, pollen and dust mite debris. The MERV 11 filter will remove all of these things plus auto emissions, smoke and pet dander. The MERV 13 filter is even better, and will also remove bacteria and tobacco smoke. These discount filters will not absorb moisture or support any kind of bacterial growth. They are high-capacity filters and four should last for up to a full year.

A permanent filter is an investment that will last for many years. Permanent filters are washable and can be reused indefinitely. They are only rated MERV 5, which means they will remove lint, dust, dust mite debris and pollen, but not odors, mold or bacteria. These filters are a good way to reduce your family’s waste stream while still keeping your HVAC system operating efficiently.