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14
PA-Series
ERV
SYSTEM DESIGN
FIGURE 1.3.2 OA PUSH–EA PULL BLOWER LAYOUT
(CAN BE USED WITH CAUTIONS)
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1.3.3 OA Push–EA Pull Blower Layouts
This blower layout, Figure 1.3.2, causes the supply airstream to be at a much higher static
pressure than the exhaust airstream. This may result in air leakage, which must be evaluated in
the design process. A benefit of this layout is that both blowers are isolated from the building’s
duct system by the ERV, which provides some acoustic attenuation.
The designer should always evaluate static pressure differentials between the airstreams if this
layout is used. See section 1.5 Static Pressure Differentials on page 16.
FIGURE 1.3.3 RA PUSH–FA PULL BLOWER LAYOUT,
NOT RECOMMENDED
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INSULATE
THESE
DUCTS AND
BLOWERS
