34
Model
1 - 16 X 25 Side or 1 - 14 X 24 Bottom Return
1 - 16 X 25 Side or Bottom Return
1 - 16 X 25 Side or Bottom Return
1 - 16 X 25 Side or Bottom Return
2 - 16 X 25 Side or 1 - 20 X 25 Bottom Return
2 - 16 X 25 Side or 1 - 20 X 25 Bottom Return¹
2 - 16 X 25 Side or 1 - 24 X 24 Bottom Return¹
2 - 10 X 20 or 1 - 14 X 25 Top Return
2 - 10 X 20 or 1 - 14 X 25 Top Return
2 - 14 X 20 or 1 - 16 X 25 Top Return
2 - 14 X 20 or 1 - 20 X 25 Top Return
2 - 14 X 20 or 1 - 24 X 24 Top Return
Larger filters may be used, filters may also be centrally located.
¹ = use 2 - 16 X 25 filters and two side returns or 20 X 25 filter on
bottom return or combination side & bottom if furnace is
connected to a cooling unit over 4 tons nominal capacity
Consider installing an air cleaner with deep-pleated media
lter at the time of furnace installation. A deep-pleated
lter with a MERV rating of 8 (minimum) will often provide
better ltration to protect equipment and the air distribution
system than a standard 1” lter and often has lower static
pressure loss than a 1” lter. Also a deep-pleated lter
will typically require less frequent replacement intervals.
Avoid using highly restrictive 1” lters which produce static
pressure loss greater than .25” W.C. In some installations
the minimum lter size required (consult lter sizing chart
above) will not lend itself to a lter installation on the side
of the furnace. The installation of a centrally installed air
cleaner cabinet or a return duct lter installation may oer
more practicality.
Clean Comfort™ brand MERV 11 air cleaners have
5¼” media lters and are available in the following
congurations. Consult your distributor for information on
our complete line of IAQ Clean Comfort™ products.
Depending on the installation and/or customer preference,
diering lter arrangements can be applied. Filters can
be installed in the central return register or a side panel
external lter rack kit (upows). As an alternative a media
air lter or electronic air cleaner can be used as the
requested lter.
The following gures show possible lter locations:
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