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To determine the size of air filter
you need, simply remove the old filter and look at the sides of the filter.
A label should be affixed that indicates the nominal (or approximate) size
of the filter. A 16 x 25 x 1 air conditioner filter is fairly common, but be aware that
this is the nominal (approximate) size. The actual dimensions of the filter
will be somewhat smaller, perhaps as much as ½" an inch smaller
in both directions. Once you have found the label or printing with the
size on it, be sure to replace the old filter until you have a clean one
to replace it.
If you cannot find a size sticker
on the filter, measure it. Compare the measurements you just made against
our air filter size chart below to pick your filter size.
If there is no filter to measure,
find the track that the air filter would normally fit into. Measure the inside
of the track and compare that measurement to our filter
size chart to pick the air filter size that will fit your central air conditioner / furnace. Choose the actual size that is
up to ½" smaller than the length and width you measured so
that the air filter fits in the track.
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