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Ultra-Aire 90H Installer’s & Owner’s Manual
FOR HVAC INSTALLER ONLY
4.4F Ducting for High Efficiency Filtration
The standard filter included with the UA-90H is a very effective
MERV 11 media filter. Additional filtering options, including charcoal
filtration and 95% efficient filtration, are available with an optional
external filter housing that may be installed with the UA-90H. The
filter box is ducted to the intake of the UA-90H, and the intake
ducting is then connected to the intake side of the filter box. See the
optional accessories list or call the factory for details.
4.5 Quiet Installation
A length of 10 feet or more of acoustical flex ducting on the outlet
of the Ultra-Aire will reduce air noise from the blower. A length of
flexible ducting on all Ultra-Aire duct connections is recommended
to reduce noise and vibration transmitted to rigid ductwork in the
structure.
