Product tab
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Heat Exchanger Type
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Default: Counter-flow Both Unmixed
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Typical Range: N/A
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Min Max: N/A
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Units: N/A
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There are three types of flow configurations: counter-flow, parallel flow or cross-flow both unmixed.
Parasitic Energy
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Default: 0 W
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Typical Range: 0 to 0.4 kW
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Min Max: -999,999 to 999,999
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Units: W; kW; hp
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This field represents the electric power consumed by the controls or motor of the rotary heat exchanger. The electric power is considered constant when the unit is operating and it doesn’t contribute to the thermal load of any of the air streams.
Design Inlet Exhaust Air Temperature
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Default: 75°F (23.9°C)
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Typical Range: 60 to 120°F (15 to 48°C)
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Min Max: -130 to 158°F (-90 to 70°C)
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Units: °F; °C
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This is the temperature of the exhaust airflow that goes into the heat exchanger.
Design Outlet Air Temperature
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Default: 80°F (26.7°C)
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Typical Range: 60 to 120°F (15 to 48°C)
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Min Max: -130 to 158°F (-90 to 70°C)
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Units: °F; °C
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This is the temperature of the main supply airflow when leaving the Heat exchanger.
Design Inlet Air Temperature
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Default: 95°F (35°C)
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Typical Range: 60 to 120°F (15 to 48°C)
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Min Max: -130 to 158°F (-90 to 70°C)
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Units: °F; °C
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This is the temperature of the main supply airflow when entering the Heat exchanger.
Convection Ratio
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Default: 1
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Typical Range: 1
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Min Max: 0 to 1
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Units: N/A
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This value is the heat transfer ratio between the supply and exhaust air sides.
It is defined as: 
Where
h = surface convective heat transfer coefficient
A = heat transfer area
S = supply airside
Ex = exhaust airside
Economizer Lockout
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Default: Yes
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Typical Range: Yes
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Min Max: No, Yes
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Units: N/A
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This input denotes whether the heat exchanger unit is locked out (bypassed) when the air side economizer is operating. The input choices are Yes (meaning locked out) or No.