THE SMART TRICK OF FLEXIBLE DUCTING FOR TUNNELS THAT NOBODY IS DISCUSSING

Mainly because of the shape with the silencers, extra silencing substance is usually applied, causing a decrease audio amount as compared to precisely the same tunnel jet fan in the spherical execution.The specified impact of FGR will be the so-called “CO2 enrichment” because the concentration of CO2 improves significantly as a result of FGR. T