The visible household dust particles, and nearly all pollen and spore particles, therefore, can be caught and permanently held, very easily, if you can get them to the air cleaner. With central high efficiency air cleaners, the blower of your heating/air conditioning system performs the air movement function.
Continuous air cleaning will be accomplished when your thermostat is set for continuous air circulation. If continuous air cleaning is not required, or desired, you can manually set your control for any time period you desire. Many thermostats have a switch position for manual fan. “Automatic” turns on the blower only when heating or cooling is required. “Fan” or “manual” allows you to control blower operation.
For those who choose periodic cleaning, (as opposed to continuous cleaning through continuous furnace blower operation), the most important period is during — and for several hours after — vacuuming your home. The vacuuming process (unless you have a central vacuum system) stirs up a large volume of dust particles which must be drawn into your air cleaner.
Many of the dust particles generated, while vacuuming, are so heavy they “fall” out of the airstream before they can be drawn out of your living area. This is why it is important to do household dusting several hours after vacuuming. Normally once the heavy particles “fall out”, they are only reintroduced to the air by vacuuming, or similarly vigorous activity.
Where allergy symptoms, which are aggravated by pollens and spores, are a concern, continuous cleaning is strongly encouraged.
To recap, when removing household dust is the major benefit you are seeking, you should operate your air cleaner during and following periods when dust is being generated or “stirred up”. For pollens and spores which aggravate an allergy condition, your cleaner must be operated continuously when these pollutants are in the environment. The air cleaner can only be effective when air containing the contaminants is drawn through the high efficiency media.
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