Drolet Heat Commander Installation And Operating Instructions Manual page 21

Heat Commander Furnace Installation and Operation Manual
5.1.2 Adjustable height of the plenum
When the ceiling height, measured from the
floor, is lower than 78 1/4'' (1990 mm), it will
be possible to cut the plenum extension (A)
of at most 10" (254 mm). The plenum
extension (A) must therefore have a
minimum height of 15 1/2'' (393 mm).
Warning: The plenum extension (A) should
not obstruct the openings for the hot air
distribution of the plenum (B). The shaded
area represents the maximum cutting of
plenum extension (A).
5.1.3 Adjustable height of the plenum
(A and B); without cutting 73 1/4"
to 88" (1860 to 2240 mm).
For ceiling height from 78 1/4" (1990 mm) to
93'' (2362mm) and more.
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