Probably for appearance sake.

Filter in front would clog regularly, and rapidly. Most
people would never clean the filter, as like most people
never brush and vacuum the coils as it is. Filter would lead
to more warranty calls, as the units overheat sooner.

--
Christopher A. Young
Learn more about Jesus
www.lds.org
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wrote in message
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My complaint is that they should then include
a filter which is at the front and accessible.