Supply/extract air volumes and input powers

Figure 1. The fan's supply and extract air volumes and specific electricity consumption
Continuous line (—)Extract air
Broken line (- -)Supply air
SFP=Input power (total) (W) Air flow (max) (dm3 /s)

SFP rate (Specific Fan Power) recommended value <1.8 (kW/m3/s).

Figure 2. Fan input power