Air Filter Speeds and Filter Change Misconception IQAir pre-filter life

Editor's Note: David is our in-house IQAir Air Purifier expert. We often get asked about the IQAir filter life. This is a tricky question as it depends on a number of variables which David explains below.

The life expectancy of the IQAir filters we list on our web site for the IQAir Healthpro air cleaners are dependent on three factors.
1. How many hours a day you run the IQAir cleaner?
2. On what speed do you run the machine?
3. The pollution setting you run the filter on. This is an index from 1 to 9 with 1 being for the cleanest environment and 9 being for the dirtiest conditions.
If you go to Chapter 3, page 16 in your owner's manual there is a chart for each of the three filters depicting how many hours the filter will last based on the fan speed and the dust index. As you can see, you will get variations from 2 to 18 months depending on the speed you run it on. As far as the dust pollution setting goes, the filters come from the factory set at 4 and it is recommended you leave them at 4 unless you are aware of extremes of clean or dirty air. So assuming the dust index of 4, the pre-filter will last between 2.5 and 18.25 months. You can monitor the remaining life in hours of each of your IQAir filters from the control panel on your unit. You can also program your IQAir unit to turn on or off, set it to a particular fan speed, and activate it via a timer.