4.3.2 Air Exchange Rates in Differently Sized Rooms
Any air cleaner can only be effective if it filters a sufficient amount of air in an indoor environment. For general air
cleaning purposes,the IQAir® system should be able to filter the room air volume at least twice every hour on the set
fan speed to achieve a significant air quality improvement. If the intensity of the pollution source is high or a high
degree of purification is needed, more air changes may become necessary. In order to achieve the desired number
of air changes, more than one air cleaner may be required.
The number of air changes that are necessary to attain a certain level of indoor air quality will depend on a variety
of factors, including:
• Intensity of air pollution source: The higher the rate at which air pollutants are produced or enter the indoor
environment, the higher the air cleaning rate in the room needs to be.
• Filtration efficiency for specific air pollutants: The lower the filtration efficiency for certain pollutants, the more
air changes are required to reduce these pollutants.
• Desired improvement in air quality: The higher the desired improvement in air quality, the more air changes are
required.
The number of air changes per hour (ACH) produced by an IQAir® system in a specific environment are calculated as
follows:
hourly air delivery of the IQAir® system (cfm)
= air changes per hour (ACH)
air volume of the room (cu.ft.)
N.B. The air delivery rates of the IQAir® system at the various fan speeds settings are listed on the “Technical
Specifications”sheet.
Example calculation: A room with the dimensions of 13 x 14 x 8.5 ft. has an air volume of 1,547 cu.ft.With an air
delivery rate of 140 cfm, the room air volume will be circulated over 5.4 times per hour by the
IQAir® system (140 cfm = 8,400 cu.ft/h; 8,400 cu.ft/h ÷ 1,547 cu.ft = 5.43 ACH).
4.4 Using the Menu Functions
The IQAir® control panel offers a choice of several menu options which allow access to the advanced features of the
system. In total there are ten active menu functions.The functions can be accessed in standby or running mode.
4.4.1 Menu Overview
Pressing the Menu key accesses the menu functions in the following order:
1. Filter Life Monitor
Allows the viewing of the remaining filter life of the individual filters
within the system.
2. Setting the Timer ON period
Allows to activate the timer and set the Timer ON period.
3. Automatic Timer
Allows to deactivate the Timer ON period on certain days of the week.
4. Timer ON Speed Selection
Allows to set the fan speed for the Timer ON period.
5. Timer OFF Speed Selection
Allows to set the fan speed outside the Timer ON period.
6. Time & Day Setting
Allows to set the current time and day setting.
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Chapter 4 – Using the Control Panel
