Supply/extract air volumes and input powers

Figure 10. Supply and extract air volumes

Table 13. Supply and extract air volumes - description of the diagram

Code	Description
A	Pressure loss in ducts. Total pressure (Pa)
B	Volume flow rate (dm³/s)
Continuous line (—)	Extract air
Broken line (┄)	Supply air
P	Extract air fan
T	Supply air fan
SFP	$\frac{Input power (total) (W)}{Air flow (max) (l/s)}$ SFP rate (Specific Fan Power) recommended value <1.8 (kW m³/s). When a lower total pressure is used, also the SFP of the speed is lowered.

Figure 11. Input power

Table 14. Input power - description of the diagram

Code	Description
A	Power (W)
B	Volume flow rate