Home Air Filters

When choosing a filter, consider the efficiency of the filter with regards to your system and the overall filter performance . . .

Is it pleated? A pleated filter provides additional surface area on which particles can be trapped.
Is it electrostatically charged? Filters with electrostatic charging can attract and capture particles that other filters can miss.
What type of particulates does it capture?
What is the filter's efficiency?
What is its MERV rating? A larger MERV (Minimum Efficiency Reporting Value) number means better filtration. (Scale for a MERV Rating is 1 to 16)
How many air changes (jump to link to definition) per hour do you want?