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Marvair Scholar 2.0 I&S Manual 08/2021 Rev.2
The air distribution system which is field supplied and installed downstream of the specified
ducted plenum
must be engineered to assure sufficient air flow, even under adverse
conditions, such as dirty filters. The information provided in Figure 1, Appendix A should be
used to design the air distribution system duct size leaving the Scholar 2.0 unit, keeping
the external static pressure to a minimum.
Applications using duct work should be designed and installed in accordance with the
current edition of the National Fire Protection Association codes and standards 90A and
90B. The duct system must be engineered to insure sufficient air flow through the unit
to prevent over-heating of the heater element. This includes proper supply duct sizing,
sufficient quantity of supply registers, adequate return and filter area. Ductwork must be
of correct material and must be properly insulated. The duct work must be constructed
of galvanized steel with a minimum thickness of .019. Ductwork must be firmly attached,
secured and sealed to prevent air leakage. Do not use duct liner on inside of supply duct
within four feet of the unit.
Galvanized metal duct extensions should be used to simplify connections to ductwork and
grilles. Use fabric boots to prevent the transmission of vibration through the duct system.
The fabric must be U.L. rated to a minimum of 197°F.
