|   | STS-S/125x75/200 | Spiral duct diameter Ø200 mm, installation hole on duct dimensions 125x75 mm, air flow opening dimensions 110x60 mm, effective area ? m² | 
|   | STS-S/125x75/200 | 
| Spiral duct diameter Ø200 mm, installation hole on duct dimensions 125x75 mm, air flow opening dimensions 110x60 mm, effective area ? m² | 
| STS-S/225x75/200 | Spiral duct diameter Ø200 mm, installation hole on duct dimensions 225x75 mm, air flow opening dimensions 210x60 mm, effective area 0.012 m² | 
|   | STS-S/225x75/200 | 
| Spiral duct diameter Ø200 mm, installation hole on duct dimensions 225x75 mm, air flow opening dimensions 210x60 mm, effective area 0.012 m² | 
| STS-S/325x75/200 | Spiral duct diameter Ø200 mm, installation hole on duct dimensions 325x75 mm, air flow opening dimensions 310x60 mm, effective area 0.017 m² | 
|   | STS-S/325x75/200 | 
| Spiral duct diameter Ø200 mm, installation hole on duct dimensions 325x75 mm, air flow opening dimensions 310x60 mm, effective area 0.017 m² | 
| STS-S/425x75/200 | Spiral duct diameter Ø200 mm, installation hole on duct dimensions 425x75 mm, air flow opening dimensions 410x60 mm, effective area 0.022 m² | 
|   | STS-S/425x75/200 | 
| Spiral duct diameter Ø200 mm, installation hole on duct dimensions 425x75 mm, air flow opening dimensions 410x60 mm, effective area 0.022 m² | 
| STS-S/525x75/200 | Spiral duct diameter Ø200 mm, installation hole on duct dimensions 525x75 mm, air flow opening dimensions 510x60 mm, effective area 0.025 m² | 
|   | STS-S/525x75/200 | 
| Spiral duct diameter Ø200 mm, installation hole on duct dimensions 525x75 mm, air flow opening dimensions 510x60 mm, effective area 0.025 m² | 
| STS-S/625x75/200 | Spiral duct diameter Ø200 mm, installation hole on duct dimensions 625x75 mm, air flow opening dimensions 610x60 mm, effective area 0.030 m² | 
|   | STS-S/625x75/200 | 
| Spiral duct diameter Ø200 mm, installation hole on duct dimensions 625x75 mm, air flow opening dimensions 610x60 mm, effective area 0.030 m² | 
| STS-S/825x75/200 | Spiral duct diameter Ø200 mm, installation hole on duct dimensions 825x75 mm, air flow opening dimensions 810x60 mm, effective area 0.039 m² | 
|   | STS-S/825x75/200 | 
| Spiral duct diameter Ø200 mm, installation hole on duct dimensions 825x75 mm, air flow opening dimensions 810x60 mm, effective area 0.039 m² | 
| STS-S/1025x75/200 | Spiral duct diameter Ø200 mm, installation hole on duct dimensions 1025x75 mm, air flow opening dimensions 1010x60 mm, effective area 0.048 m² | 
|   | STS-S/1025x75/200 | 
| Spiral duct diameter Ø200 mm, installation hole on duct dimensions 1025x75 mm, air flow opening dimensions 1010x60 mm, effective area 0.048 m² | 
| STS-S/1225x75/200 | Spiral duct diameter Ø200 mm, installation hole on duct dimensions 1225x75 mm, air flow opening dimensions 1210x60 mm, effective area 0.057 m² | 
|   | STS-S/1225x75/200 | 
| Spiral duct diameter Ø200 mm, installation hole on duct dimensions 1225x75 mm, air flow opening dimensions 1210x60 mm, effective area 0.057 m² | 
| STS-S/125x125/250 | Spiral duct diameter Ø250 mm, installation hole on duct dimensions 125x125 mm, air flow opening dimensions 110x110 mm, effective area 0.012 m² | 
|   | STS-S/125x125/250 | 
| Spiral duct diameter Ø250 mm, installation hole on duct dimensions 125x125 mm, air flow opening dimensions 110x110 mm, effective area 0.012 m² | 
| STS-S/225x125/250 | Spiral duct diameter Ø250 mm, installation hole on duct dimensions 225x125 mm, air flow opening dimensions 210x110 mm, effective area 0.020 m² | 
|   | STS-S/225x125/250 | 
| Spiral duct diameter Ø250 mm, installation hole on duct dimensions 225x125 mm, air flow opening dimensions 210x110 mm, effective area 0.020 m² | 
| STS-S/325x125/250 | Spiral duct diameter Ø250 mm, installation hole on duct dimensions 325x125 mm, air flow opening dimensions 310x110 mm, effective area 0.029 m² | 
|   | STS-S/325x125/250 | 
| Spiral duct diameter Ø250 mm, installation hole on duct dimensions 325x125 mm, air flow opening dimensions 310x110 mm, effective area 0.029 m² | 
| STS-S/425x125/250 | Spiral duct diameter Ø250 mm, installation hole on duct dimensions 425x125 mm, air flow opening dimensions 410x110 mm, effective area 0.037 m² | 
|   | STS-S/425x125/250 | 
| Spiral duct diameter Ø250 mm, installation hole on duct dimensions 425x125 mm, air flow opening dimensions 410x110 mm, effective area 0.037 m² | 
| STS-S/525x125/250 | Spiral duct diameter Ø250 mm, installation hole on duct dimensions 525x125 mm, air flow opening dimensions 510x110 mm, effective area 0.043 m² | 
|   | STS-S/525x125/250 | 
| Spiral duct diameter Ø250 mm, installation hole on duct dimensions 525x125 mm, air flow opening dimensions 510x110 mm, effective area 0.043 m² | 
| STS-S/625x125/250 | Spiral duct diameter Ø250 mm, installation hole on duct dimensions 625x125 mm, air flow opening dimensions 610x110 mm, effective area 0.051 m² | 
|   | STS-S/625x125/250 | 
| Spiral duct diameter Ø250 mm, installation hole on duct dimensions 625x125 mm, air flow opening dimensions 610x110 mm, effective area 0.051 m² | 
| STS-S/825x125/250 | Spiral duct diameter Ø250 mm, installation hole on duct dimensions 825x125 mm, air flow opening dimensions 810x110 mm, effective area 0.068 m² | 
|   | STS-S/825x125/250 | 
| Spiral duct diameter Ø250 mm, installation hole on duct dimensions 825x125 mm, air flow opening dimensions 810x110 mm, effective area 0.068 m² | 
| STS-S/1025x125/250 | Spiral duct diameter Ø250 mm, installation hole on duct dimensions 1025x125 mm, air flow opening dimensions 1010x110 mm, effective area 0.085 m² | 
|   | STS-S/1025x125/250 | 
| Spiral duct diameter Ø250 mm, installation hole on duct dimensions 1025x125 mm, air flow opening dimensions 1010x110 mm, effective area 0.085 m² | 
| STS-S/1225x125/250 | Spiral duct diameter Ø250 mm, installation hole on duct dimensions 1225x125 mm, air flow opening dimensions 1210x110 mm, effective area 0.101 m² | 
|   | STS-S/1225x125/250 | 
| Spiral duct diameter Ø250 mm, installation hole on duct dimensions 1225x125 mm, air flow opening dimensions 1210x110 mm, effective area 0.101 m² | 
| STS-S/225x225/350 | Spiral duct diameter Ø350 mm, installation hole on duct dimensions 225x225 mm, air flow opening dimensions 210x210 mm, effective area 0.036 m² | 
|   | STS-S/225x225/350 | 
| Spiral duct diameter Ø350 mm, installation hole on duct dimensions 225x225 mm, air flow opening dimensions 210x210 mm, effective area 0.036 m² | 
| STS-S/325x225/350 | Spiral duct diameter Ø350 mm, installation hole on duct dimensions 325x225 mm, air flow opening dimensions 310x210 mm, effective area 0.051 m² | 
|   | STS-S/325x225/350 | 
| Spiral duct diameter Ø350 mm, installation hole on duct dimensions 325x225 mm, air flow opening dimensions 310x210 mm, effective area 0.051 m² | 
| STS-S/425x225/350 | Spiral duct diameter Ø350 mm, installation hole on duct dimensions 425x225 mm, air flow opening dimensions 410x210 mm, effective area 0.051 m² | 
|   | STS-S/425x225/350 | 
| Spiral duct diameter Ø350 mm, installation hole on duct dimensions 425x225 mm, air flow opening dimensions 410x210 mm, effective area 0.051 m² | 
| STS-S/525x225/350 | Spiral duct diameter Ø350 mm, installation hole on duct dimensions 525x225 mm, air flow opening dimensions 510x210 mm, effective area 0.078 m² | 
|   | STS-S/525x225/350 | 
| Spiral duct diameter Ø350 mm, installation hole on duct dimensions 525x225 mm, air flow opening dimensions 510x210 mm, effective area 0.078 m² | 
| STS-S/625x225/350 | Spiral duct diameter Ø350 mm, installation hole on duct dimensions 625x225 mm, air flow opening dimensions 610x210 mm, effective area 0.094 m² | 
|   | STS-S/625x225/350 | 
| Spiral duct diameter Ø350 mm, installation hole on duct dimensions 625x225 mm, air flow opening dimensions 610x210 mm, effective area 0.094 m² | 
| STS-S/825x225/350 | Spiral duct diameter Ø350 mm, installation hole on duct dimensions 825x225 mm, air flow opening dimensions 810x210 mm, effective area 0.126 m² | 
|   | STS-S/825x225/350 | 
| Spiral duct diameter Ø350 mm, installation hole on duct dimensions 825x225 mm, air flow opening dimensions 810x210 mm, effective area 0.126 m² | 
| STS-S/1025x225/350 | Spiral duct diameter Ø350 mm, installation hole on duct dimensions 1025x225 mm, air flow opening dimensions 1010x210 mm, effective area 0.158 m² | 
|   | STS-S/1025x225/350 | 
| Spiral duct diameter Ø350 mm, installation hole on duct dimensions 1025x225 mm, air flow opening dimensions 1010x210 mm, effective area 0.158 m² | 
| STS-S/1225x225/350 | Spiral duct diameter Ø350 mm, installation hole on duct dimensions 1225x225 mm, air flow opening dimensions 1210x210 mm, effective area 0.190 m² | 
|   | STS-S/1225x225/350 | 
| Spiral duct diameter Ø350 mm, installation hole on duct dimensions 1225x225 mm, air flow opening dimensions 1210x210 mm, effective area 0.190 m² | 
| STS-S/325x325/500 | Spiral duct diameter Ø500 mm, installation hole on duct dimensions 325x325 mm, air flow opening dimensions 310x310 mm, effective area 0.074 m² | 
|   | STS-S/325x325/500 | 
| Spiral duct diameter Ø500 mm, installation hole on duct dimensions 325x325 mm, air flow opening dimensions 310x310 mm, effective area 0.074 m² | 
| STS-S/425x325/500 | Spiral duct diameter Ø500 mm, installation hole on duct dimensions 425x325 mm, air flow opening dimensions 410x310 mm, effective area 0.098 m² | 
|   | STS-S/425x325/500 | 
| Spiral duct diameter Ø500 mm, installation hole on duct dimensions 425x325 mm, air flow opening dimensions 410x310 mm, effective area 0.098 m² | 
| STS-S/525x325/500 | Spiral duct diameter Ø500 mm, installation hole on duct dimensions 525x325 mm, air flow opening dimensions 510x310 mm, effective area 0.114 m² | 
|   | STS-S/525x325/500 | 
| Spiral duct diameter Ø500 mm, installation hole on duct dimensions 525x325 mm, air flow opening dimensions 510x310 mm, effective area 0.114 m² | 
| STS-S/625x325/500 | Spiral duct diameter Ø500 mm, installation hole on duct dimensions 625x325 mm, air flow opening dimensions 610x310 mm, effective area 0.137 m² | 
|   | STS-S/625x325/500 | 
| Spiral duct diameter Ø500 mm, installation hole on duct dimensions 625x325 mm, air flow opening dimensions 610x310 mm, effective area 0.137 m² | 
| STS-S/825x325/500 | Spiral duct diameter Ø500 mm, installation hole on duct dimensions 825x325 mm, air flow opening dimensions 810x310 mm, effective area 0.184 m² | 
|   | STS-S/825x325/500 | 
| Spiral duct diameter Ø500 mm, installation hole on duct dimensions 825x325 mm, air flow opening dimensions 810x310 mm, effective area 0.184 m² | 
| STS-S/1025x325/500 | Spiral duct diameter Ø500 mm, installation hole on duct dimensions 1025x325 mm, air flow opening dimensions 1010x310 mm, effective area 0.231 m² | 
|   | STS-S/1025x325/500 | 
| Spiral duct diameter Ø500 mm, installation hole on duct dimensions 1025x325 mm, air flow opening dimensions 1010x310 mm, effective area 0.231 m² | 
| STS-S/1225x325/500 | Spiral duct diameter Ø500 mm, installation hole on duct dimensions 1225x325 mm, air flow opening dimensions 1210x310 mm, effective area 0.282 m² | 
|   | STS-S/1225x325/500 | 
| Spiral duct diameter Ø500 mm, installation hole on duct dimensions 1225x325 mm, air flow opening dimensions 1210x310 mm, effective area 0.282 m² | 
| STS-S/425x425/630 | Spiral duct diameter Ø500 mm, installation hole on duct dimensions 425x425 mm, air flow opening dimensions 410x410 mm, effective area 0.132 m² | 
|   | STS-S/425x425/630 | 
| Spiral duct diameter Ø500 mm, installation hole on duct dimensions 425x425 mm, air flow opening dimensions 410x410 mm, effective area 0.132 m² | 
| STS-S/525x425/630 | Spiral duct diameter Ø630 mm, installation hole on duct dimensions 525x425 mm, air flow opening dimensions 510x410 mm, effective area 0.150 m² | 
|   | STS-S/525x425/630 | 
| Spiral duct diameter Ø630 mm, installation hole on duct dimensions 525x425 mm, air flow opening dimensions 510x410 mm, effective area 0.150 m² | 
| STS-S/625x425/630 | Spiral duct diameter Ø630 mm, installation hole on duct dimensions 625x425 mm, air flow opening dimensions 610x410 mm, effective area 0.181 m² | 
|   | STS-S/625x425/630 | 
| Spiral duct diameter Ø630 mm, installation hole on duct dimensions 625x425 mm, air flow opening dimensions 610x410 mm, effective area 0.181 m² | 
| STS-S/825x425/630 | Spiral duct diameter Ø630 mm, installation hole on duct dimensions 825x425 mm, air flow opening dimensions 810x410 mm, effective area 0.242 m² | 
|   | STS-S/825x425/630 | 
| Spiral duct diameter Ø630 mm, installation hole on duct dimensions 825x425 mm, air flow opening dimensions 810x410 mm, effective area 0.242 m² | 
| STS-S/1025x425/630 | Spiral duct diameter Ø630 mm, installation hole on duct dimensions 1025x425 mm, air flow opening dimensions 1010x410 mm, effective area 0.304 m² | 
|   | STS-S/1025x425/630 | 
| Spiral duct diameter Ø630 mm, installation hole on duct dimensions 1025x425 mm, air flow opening dimensions 1010x410 mm, effective area 0.304 m² | 
| STS-S/1225x425/630 | Spiral duct diameter Ø630 mm, installation hole on duct dimensions 1225x425 mm, air flow opening dimensions 1210x410 mm, effective area 0.366 m² | 
|   | STS-S/1225x425/630 | 
| Spiral duct diameter Ø630 mm, installation hole on duct dimensions 1225x425 mm, air flow opening dimensions 1210x410 mm, effective area 0.366 m² | 
| STS-S/525x525/800 | Spiral duct diameter Ø800 mm, installation hole on duct dimensions 525x525 mm, air flow opening dimensions 510x510 mm, effective area 0.185 m² | 
|   | STS-S/525x525/800 | 
| Spiral duct diameter Ø800 mm, installation hole on duct dimensions 525x525 mm, air flow opening dimensions 510x510 mm, effective area 0.185 m² | 
| STS-S/625x525/800 | Spiral duct diameter Ø800 mm, installation hole on duct dimensions 625x525 mm, air flow opening dimensions 610x510 mm, effective area 0.224 m² | 
|   | STS-S/625x525/800 | 
| Spiral duct diameter Ø800 mm, installation hole on duct dimensions 625x525 mm, air flow opening dimensions 610x510 mm, effective area 0.224 m² | 
| STS-S/825x525/800 | Spiral duct diameter Ø800 mm, installation hole on duct dimensions 825x525 mm, air flow opening dimensions 810x510 mm, effective area 0.230 m² | 
|   | STS-S/825x525/800 | 
| Spiral duct diameter Ø800 mm, installation hole on duct dimensions 825x525 mm, air flow opening dimensions 810x510 mm, effective area 0.230 m² | 
| STS-S/1025x525/800 | Spiral duct diameter Ø800 mm, installation hole on duct dimensions 1025x525 mm, air flow opening dimensions 1010x510 mm, effective area 0.377 m² | 
|   | STS-S/1025x525/800 | 
| Spiral duct diameter Ø800 mm, installation hole on duct dimensions 1025x525 mm, air flow opening dimensions 1010x510 mm, effective area 0.377 m² | 
| STS-S/1225x525/800 | Spiral duct diameter Ø800 mm, installation hole on duct dimensions 1225x525 mm, air flow opening dimensions 1210x510 mm, effective area 0.454 m² | 
|   | STS-S/1225x525/800 | 
| Spiral duct diameter Ø800 mm, installation hole on duct dimensions 1225x525 mm, air flow opening dimensions 1210x510 mm, effective area 0.454 m² | 
| STS-S/625x625/1000 | Spiral duct diameter Ø1000 mm, installation hole on duct dimensions 625x625 mm, air flow opening dimensions 610x610 mm, effective area 0.267 m² | 
|   | STS-S/625x625/1000 | 
| Spiral duct diameter Ø1000 mm, installation hole on duct dimensions 625x625 mm, air flow opening dimensions 610x610 mm, effective area 0.267 m² | 
| STS-S/825x625/1000 | Spiral duct diameter Ø1000 mm, installation hole on duct dimensions 825x625 mm, air flow opening dimensions 810x610 mm, effective area 0.359 m² | 
|   | STS-S/825x625/1000 | 
| Spiral duct diameter Ø1000 mm, installation hole on duct dimensions 825x625 mm, air flow opening dimensions 810x610 mm, effective area 0.359 m² | 
| STS-S/1025x625/1000 | Spiral duct diameter Ø1000 mm, installation hole on duct dimensions 1025x625 mm, air flow opening dimensions 1010x610 mm, effective area 0.450 m² | 
|   | STS-S/1025x625/1000 | 
| Spiral duct diameter Ø1000 mm, installation hole on duct dimensions 1025x625 mm, air flow opening dimensions 1010x610 mm, effective area 0.450 m² | 
| STS-S/1225x625/1000 | Spiral duct diameter Ø1000 mm, installation hole on duct dimensions 1225x625 mm, air flow opening dimensions 1210x610 mm, effective area 0.542 m² | 
|   | STS-S/1225x625/1000 | 
| Spiral duct diameter Ø1000 mm, installation hole on duct dimensions 1225x625 mm, air flow opening dimensions 1210x610 mm, effective area 0.542 m² |