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Posted by Tony Hwang on July 20, 2005, 3:11 pm
Joseph Meehan wrote:
> Sandy K. wrote:
>
>>This may sound like a dumb question, but it's been bothering me for
>>quite a while. Our forced hot air furnace/AC unit in the basement
>>has a fan at the bottom. Filters (those carboard/blue things - ours
>>is 16x25x1) are placed between the fan and a large duct. The filters
>>have an arrow on them that show how it should be placed - given the
>>direction of the airflow. Only problem is, is that I don't know the
>>direction of the airflow. Does it flow from the fan to the duct or
>>from the duct to the fan?
>>
>>TIA,
>>Sandy K.
>
>
> Not a dumb question. The filter's main job is to protect the fan and
> furnace from too much dust. It should be placed before the fan, so the
> arrow should point towards the fan.
>
Hi,
In another word, arrow should point the flow of air.
No brainer at all. When I had my house built 10 years ago I insisted on
cleaning everything off the floors and walls any dust or fine debris
accumulated during construction. Now all I have is an electronic air
cleaner catching dust. It's clean house to begin with.
Tony
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