I am confused about changing the Pad D filter in this furnace. There are 2 sides to the pad - on side is denser and seems that it would not allow as much dust to pass through. Which side faces the inside of the furnace?
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Tepierce; Welcome to the Forum... Are you sure there is no "air-flow" arrow? Normally the DENSER side will be closest to the INTAKE side of the FAN. Hube -
There is an arrow pointing down that says "fan direction". This filter is a large unframed piece of filter that goes around a u-shaped metal screen which slides in and out of the furnace. One side would be closest to the fan and one side would be farthest away.
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The arrow should be installed pointing into the fan intake. HubeComment
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