Supply/extract air volumes and input powers

Abbreviations used in the table have been explained below:

A — Pressure loss in ducts. Total pressure (Pa)
B — Volume flow rate (dm³/s)
C — Recommended operating range
Continuous line (—) — Extract air
Broken line (┄) — Supply air
SFP = $\frac{Input power (total W)}{Airflow specified in the ventilation plan (extract l/s)}$

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 39. Supply and extract air volumes

Figure 40. Input power

Table 49. Input power - description of the diagram

Code	Description
A	Power (W)
B	Volume flow rate