Performance Data Curves - Trane GRAA Installation, Operation And Maintenance Manual

Performance Data Curves

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Figure 3. High Temperature Rise Duct Furnace — 30–90°F (17–50°C)
Pressure drop through the heat exchanger is based on the CFM throughput. The desired data
is obtained in the following manner:
– Select heater size based on heat loss of the building to be heated.
– Select temperature rise desired.
–
Based on temperature rise, the horizontal line intersects heater temperature vs. CFM
curve.
–
Follow vertical line down to select CFM.
– For pressure drop selection, follow vertical CFM line until it intersects the selected heater
performance curve vs. pressure drop.
– Follow the horizontal pressure drop line to the left, and read pressure drop of the selected
heater.
MUA-SVX004B-EN