ModelAirflow (m³/h)DiameterPowerNoiseFire rating
- Airflow
- 1,845 m³/h
- Diameter
- 315 mm
- Power
- 0.12 kW
- Noise
- 81 dB(A)
- Fire rating
- —
- Airflow
- 2,145 m³/h
- Diameter
- 315 mm
- Power
- 0.12 kW
- Noise
- 81 dB(A)
- Fire rating
- —
- Airflow
- 2,145 m³/h
- Diameter
- 315 mm
- Power
- 0.12 kW
- Noise
- 81 dB(A)
- Fire rating
- —
- Airflow
- 2,145 m³/h
- Diameter
- 315 mm
- Power
- 0.12 kW
- Noise
- 81 dB(A)
- Fire rating
- —
- Airflow
- 2,145 m³/h
- Diameter
- 315 mm
- Power
- 0.12 kW
- Noise
- 81 dB(A)
- Fire rating
- —
- Airflow
- 2,559 m³/h
- Diameter
- 355 mm
- Power
- 0.12 kW
- Noise
- 85 dB(A)
- Fire rating
- —
- Airflow
- 2,613 m³/h
- Diameter
- 315 mm
- Power
- 0.18 kW
- Noise
- 72 dB(A)
- Fire rating
- —
- Airflow
- 2,613 m³/h
- Diameter
- 315 mm
- Power
- 0.18 kW
- Noise
- 72 dB(A)
- Fire rating
- —
- Airflow
- 3,074 m³/h
- Diameter
- 355 mm
- Power
- 0.12 kW
- Noise
- 85 dB(A)
- Fire rating
- —
- Airflow
- 3,074 m³/h
- Diameter
- 355 mm
- Power
- 0.12 kW
- Noise
- 85 dB(A)
- Fire rating
- —
- Airflow
- 3,074 m³/h
- Diameter
- 355 mm
- Power
- 0.12 kW
- Noise
- 85 dB(A)
- Fire rating
- —
- Airflow
- 3,745 m³/h
- Diameter
- 355 mm
- Power
- 0.18 kW
- Noise
- 75 dB(A)
- Fire rating
- —
- Airflow
- 3,946 m³/h
- Diameter
- 450 mm
- Power
- 0.37 kW
- Noise
- 63 dB(A)
- Fire rating
- —
- Airflow
- 3,946 m³/h
- Diameter
- 450 mm
- Power
- 0.18 kW
- Noise
- 63 dB(A)
- Fire rating
- —
- Airflow
- 4,578 m³/h
- Diameter
- 400 mm
- Power
- 0.18 kW
- Noise
- 82 dB(A)
- Fire rating
- —
- Airflow
- 4,578 m³/h
- Diameter
- 400 mm
- Power
- 0.18 kW
- Noise
- 82 dB(A)
- Fire rating
- —
- Airflow
- 4,578 m³/h
- Diameter
- 400 mm
- Power
- 0.18 kW
- Noise
- 82 dB(A)
- Fire rating
- —
- Airflow
- 5,118 m³/h
- Diameter
- 355 mm
- Power
- 0.75 kW
- Noise
- 97 dB(A)
- Fire rating
- —
- Airflow
- 5,118 m³/h
- Diameter
- 355 mm
- Power
- 0.75 kW
- Noise
- 97 dB(A)
- Fire rating
- —
- Airflow
- 5,118 m³/h
- Diameter
- 355 mm
- Power
- 0.75 kW
- Noise
- 78 dB(A)
- Fire rating
- —
- Airflow
- 5,118 m³/h
- Diameter
- 355 mm
- Power
- 0.75 kW
- Noise
- 78 dB(A)
- Fire rating
- —
- Airflow
- 5,149 m³/h
- Diameter
- 400 mm
- Power
- 0.25 kW
- Noise
- 69 dB(A)
- Fire rating
- —
- Airflow
- 5,149 m³/h
- Diameter
- 400 mm
- Power
- 0.25 kW
- Noise
- 69 dB(A)
- Fire rating
- —
- Airflow
- 5,149 m³/h
- Diameter
- 400 mm
- Power
- 0.25 kW
- Noise
- 69 dB(A)
- Fire rating
- —
- Airflow
- 6,148 m³/h
- Diameter
- 355 mm
- Power
- 1.1 kW
- Noise
- 100 dB(A)
- Fire rating
- —
- Airflow
- 6,148 m³/h
- Diameter
- 355 mm
- Power
- 1.1 kW
- Noise
- 100 dB(A)
- Fire rating
- —
- Airflow
- 6,148 m³/h
- Diameter
- 355 mm
- Power
- 1.1 kW
- Noise
- 76 dB(A)
- Fire rating
- —
- Airflow
- 6,148 m³/h
- Diameter
- 355 mm
- Power
- 1.1 kW
- Noise
- 76 dB(A)
- Fire rating
- —
- Airflow
- 6,334 m³/h
- Diameter
- 450 mm
- Power
- 0.25 kW
- Noise
- 74 dB(A)
- Fire rating
- —
- Airflow
- 6,334 m³/h
- Diameter
- 450 mm
- Power
- 0.25 kW
- Noise
- 74 dB(A)
- Fire rating
- —
- Airflow
- 7,115 m³/h
- Diameter
- 355 mm
- Power
- 2.2 kW
- Noise
- 83 dB(A)
- Fire rating
- —
- Airflow
- 7,115 m³/h
- Diameter
- 355 mm
- Power
- 2.2 kW
- Noise
- 83 dB(A)
- Fire rating
- —
- Airflow
- 7,308 m³/h
- Diameter
- 450 mm
- Power
- 0.37 kW
- Noise
- 72 dB(A)
- Fire rating
- —
- Airflow
- 7,308 m³/h
- Diameter
- 450 mm
- Power
- 0.37 kW
- Noise
- 72 dB(A)
- Fire rating
- —
- Airflow
- 8,050 m³/h
- Diameter
- 450 mm
- Power
- 1.1 kW
- Noise
- 78 dB(A)
- Fire rating
- —
- Airflow
- 8,050 m³/h
- Diameter
- 450 mm
- Power
- 1.1 kW
- Noise
- 78 dB(A)
- Fire rating
- —
- Airflow
- 8,050 m³/h
- Diameter
- 450 mm
- Power
- 1.1 kW
- Noise
- 77 dB(A)
- Fire rating
- —
- Airflow
- 8,050 m³/h
- Diameter
- 450 mm
- Power
- 1.1 kW
- Noise
- 77 dB(A)
- Fire rating
- —
- Airflow
- 8,882 m³/h
- Diameter
- 400 mm
- Power
- 1.5 kW
- Noise
- 91 dB(A)
- Fire rating
- —
- Airflow
- 8,882 m³/h
- Diameter
- 400 mm
- Power
- 1.5 kW
- Noise
- 91 dB(A)
- Fire rating
- —
- Airflow
- 8,882 m³/h
- Diameter
- 400 mm
- Power
- 1.5 kW
- Noise
- 80 dB(A)
- Fire rating
- —
- Airflow
- 8,882 m³/h
- Diameter
- 400 mm
- Power
- 1.5 kW
- Noise
- 80 dB(A)
- Fire rating
- —
- Airflow
- 8,986 m³/h
- Diameter
- 560 mm
- Power
- 0.25 kW
- Noise
- 69 dB(A)
- Fire rating
- —
- Airflow
- 8,986 m³/h
- Diameter
- 560 mm
- Power
- 0.25 kW
- Noise
- 69 dB(A)
- Fire rating
- —
- Airflow
- 9,180 m³/h
- Diameter
- 500 mm
- Power
- 2.2 kW
- Noise
- 87 dB(A)
- Fire rating
- —
- Airflow
- 9,635 m³/h
- Diameter
- 560 mm
- Power
- 0.75 kW
- Noise
- 76 dB(A)
- Fire rating
- —
- Airflow
- 9,635 m³/h
- Diameter
- 560 mm
- Power
- 0.75 kW
- Noise
- 76 dB(A)
- Fire rating
- —
- Airflow
- 9,774 m³/h
- Diameter
- 630 mm
- Power
- 0.25 kW
- Noise
- 63 dB(A)
- Fire rating
- —
- Airflow
- 9,774 m³/h
- Diameter
- 630 mm
- Power
- 0.25 kW
- Noise
- 63 dB(A)
- Fire rating
- —
- Airflow
- 9,989 m³/h
- Diameter
- 400 mm
- Power
- 2.2 kW
- Noise
- 84 dB(A)
- Fire rating
- —
- Airflow
- 9,989 m³/h
- Diameter
- 400 mm
- Power
- 2.2 kW
- Noise
- 84 dB(A)
- Fire rating
- —
- Airflow
- 9,989 m³/h
- Diameter
- 400 mm
- Power
- 2.2 kW
- Noise
- 82 dB(A)
- Fire rating
- —
- Airflow
- 9,989 m³/h
- Diameter
- 400 mm
- Power
- 2.2 kW
- Noise
- 82 dB(A)
- Fire rating
- —
- Airflow
- 10,514 m³/h
- Diameter
- 450 mm
- Power
- 2.2 kW
- Noise
- 89 dB(A)
- Fire rating
- —
- Airflow
- 10,514 m³/h
- Diameter
- 450 mm
- Power
- 2.2 kW
- Noise
- 89 dB(A)
- Fire rating
- —
- Airflow
- 10,514 m³/h
- Diameter
- 450 mm
- Power
- 2.2 kW
- Noise
- 81 dB(A)
- Fire rating
- —
- Airflow
- 10,514 m³/h
- Diameter
- 450 mm
- Power
- 2.2 kW
- Noise
- 81 dB(A)
- Fire rating
- —
- Airflow
- 10,800 m³/h
- Diameter
- 630 mm
- Power
- 0.37 kW
- Noise
- 72 dB(A)
- Fire rating
- —
- Airflow
- 10,800 m³/h
- Diameter
- 630 mm
- Power
- 0.37 kW
- Noise
- 72 dB(A)
- Fire rating
- —
- Airflow
- 11,251 m³/h
- Diameter
- 560 mm
- Power
- 0.37 kW
- Noise
- 79 dB(A)
- Fire rating
- —
- Airflow
- 11,251 m³/h
- Diameter
- 560 mm
- Power
- 0.37 kW
- Noise
- 79 dB(A)
- Fire rating
- —
- Airflow
- 11,600 m³/h
- Diameter
- 400 mm
- Power
- 3 kW
- Noise
- 85 dB(A)
- Fire rating
- —
- Airflow
- 11,600 m³/h
- Diameter
- 400 mm
- Power
- 3 kW
- Noise
- 85 dB(A)
- Fire rating
- —
- Airflow
- 12,375 m³/h
- Diameter
- 450 mm
- Power
- 3 kW
- Noise
- 87 dB(A)
- Fire rating
- —
- Airflow
- 12,375 m³/h
- Diameter
- 450 mm
- Power
- 3 kW
- Noise
- 87 dB(A)
- Fire rating
- —
- Airflow
- 12,375 m³/h
- Diameter
- 450 mm
- Power
- 3 kW
- Noise
- 85 dB(A)
- Fire rating
- —
- Airflow
- 12,375 m³/h
- Diameter
- 450 mm
- Power
- 3 kW
- Noise
- 85 dB(A)
- Fire rating
- —
- Airflow
- 12,415 m³/h
- Diameter
- 560 mm
- Power
- 1.1 kW
- Noise
- 76 dB(A)
- Fire rating
- —
- Airflow
- 12,415 m³/h
- Diameter
- 560 mm
- Power
- 1.1 kW
- Noise
- 76 dB(A)
- Fire rating
- —
- Airflow
- 12,415 m³/h
- Diameter
- 560 mm
- Power
- 11 kW
- Noise
- 76 dB(A)
- Fire rating
- —
- Airflow
- 13,254 m³/h
- Diameter
- 710 mm
- Power
- 0.37 kW
- Noise
- 66 dB(A)
- Fire rating
- —
- Airflow
- 13,254 m³/h
- Diameter
- 710 mm
- Power
- 0.37 kW
- Noise
- 66 dB(A)
- Fire rating
- —
- Airflow
- 13,954 m³/h
- Diameter
- 450 mm
- Power
- 4 kW
- Noise
- 89 dB(A)
- Fire rating
- —
- Airflow
- 13,954 m³/h
- Diameter
- 450 mm
- Power
- 4 kW
- Noise
- 89 dB(A)
- Fire rating
- —
- Airflow
- 14,298 m³/h
- Diameter
- 630 mm
- Power
- 0.55 kW
- Noise
- 71 dB(A)
- Fire rating
- —
- Airflow
- 14,298 m³/h
- Diameter
- 630 mm
- Power
- 0.55 kW
- Noise
- 71 dB(A)
- Fire rating
- —
- Airflow
- 14,446 m³/h
- Diameter
- 630 mm
- Power
- 1.1 kW
- Noise
- 73 dB(A)
- Fire rating
- —
- Airflow
- 14,446 m³/h
- Diameter
- 630 mm
- Power
- 1.1 kW
- Noise
- 73 dB(A)
- Fire rating
- —
- Airflow
- 14,968 m³/h
- Diameter
- 800 mm
- Power
- 0.37 kW
- Noise
- 78 dB(A)
- Fire rating
- —
- Airflow
- 14,968 m³/h
- Diameter
- 800 mm
- Power
- 0.37 kW
- Noise
- 78 dB(A)
- Fire rating
- —
- Airflow
- 15,570 m³/h
- Diameter
- 630 mm
- Power
- 0.75 kW
- Noise
- 75 dB(A)
- Fire rating
- —
- Airflow
- 15,570 m³/h
- Diameter
- 630 mm
- Power
- 0.75 kW
- Noise
- 75 dB(A)
- Fire rating
- —
- Airflow
- 15,698 m³/h
- Diameter
- 710 mm
- Power
- 0.55 kW
- Noise
- 79 dB(A)
- Fire rating
- —
- Airflow
- 15,698 m³/h
- Diameter
- 710 mm
- Power
- 0.55 kW
- Noise
- 79 dB(A)
- Fire rating
- —
- Airflow
- 16,936 m³/h
- Diameter
- 630 mm
- Power
- 1.5 kW
- Noise
- 80 dB(A)
- Fire rating
- —
- Airflow
- 16,936 m³/h
- Diameter
- 630 mm
- Power
- 1.5 kW
- Noise
- 80 dB(A)
- Fire rating
- —
- Airflow
- 18,200 m³/h
- Diameter
- 710 mm
- Power
- 0.75 kW
- Noise
- 76 dB(A)
- Fire rating
- —
- Airflow
- 18,200 m³/h
- Diameter
- 710 mm
- Power
- 0.75 kW
- Noise
- 76 dB(A)
- Fire rating
- —
- Airflow
- 18,535 m³/h
- Diameter
- 800 mm
- Power
- 0.75 kW
- Noise
- 78 dB(A)
- Fire rating
- —
- Airflow
- 18,535 m³/h
- Diameter
- 800 mm
- Power
- 0.75 kW
- Noise
- 78 dB(A)
- Fire rating
- —
- Airflow
- 19,403 m³/h
- Diameter
- 630 mm
- Power
- 1.5 kW
- Noise
- 78 dB(A)
- Fire rating
- —
- Airflow
- 19,403 m³/h
- Diameter
- 630 mm
- Power
- 1.5 kW
- Noise
- 78 dB(A)
- Fire rating
- —
- Airflow
- 19,889 m³/h
- Diameter
- 710 mm
- Power
- 2.2 kW
- Noise
- 75 dB(A)
- Fire rating
- —
- Airflow
- 19,889 m³/h
- Diameter
- 710 mm
- Power
- 2.2 kW
- Noise
- 75 dB(A)
- Fire rating
- —
- Airflow
- 19,889 m³/h
- Diameter
- 710 mm
- Power
- 2.2 kW
- Noise
- 75 dB(A)
- Fire rating
- —
- Airflow
- 21,465 m³/h
- Diameter
- 900 mm
- Power
- 0.75 kW
- Noise
- 77 dB(A)
- Fire rating
- —
- Airflow
- 21,465 m³/h
- Diameter
- 900 mm
- Power
- 0.75 kW
- Noise
- 77 dB(A)
- Fire rating
- —
- Airflow
- 21,938 m³/h
- Diameter
- 630 mm
- Power
- 2.2 kW
- Noise
- 81 dB(A)
- Fire rating
- —
- Airflow
- 21,938 m³/h
- Diameter
- 630 mm
- Power
- 2.2 kW
- Noise
- 81 dB(A)
- Fire rating
- —
- Airflow
- 22,433 m³/h
- Diameter
- 710 mm
- Power
- 1.1 kW
- Noise
- 80 dB(A)
- Fire rating
- —
- Airflow
- 22,433 m³/h
- Diameter
- 710 mm
- Power
- 1.1 kW
- Noise
- 80 dB(A)
- Fire rating
- —
- Airflow
- 22,963 m³/h
- Diameter
- 710 mm
- Power
- 2.2 kW
- Noise
- 89 dB(A)
- Fire rating
- —
- Airflow
- 22,963 m³/h
- Diameter
- 710 mm
- Power
- 2.2 kW
- Noise
- 89 dB(A)
- Fire rating
- —
- Airflow
- 22,963 m³/h
- Diameter
- 710 mm
- Power
- 2.2 kW
- Noise
- 89 dB(A)
- Fire rating
- —
- Airflow
- 23,715 m³/h
- Diameter
- 900 mm
- Power
- 2.2 kW
- Noise
- 80 dB(A)
- Fire rating
- —
- Airflow
- 23,715 m³/h
- Diameter
- 1,000 mm
- Power
- 3 kW
- Noise
- 83 dB(A)
- Fire rating
- —
- Airflow
- 23,715 m³/h
- Diameter
- 900 mm
- Power
- 2.2 kW
- Noise
- 80 dB(A)
- Fire rating
- —
- Airflow
- 23,715 m³/h
- Diameter
- 1,000 mm
- Power
- 3 kW
- Noise
- 83 dB(A)
- Fire rating
- —
- Airflow
- 26,095 m³/h
- Diameter
- 800 mm
- Power
- 4 kW
- Noise
- 81 dB(A)
- Fire rating
- —
- Airflow
- 26,095 m³/h
- Diameter
- 800 mm
- Power
- 4 kW
- Noise
- 81 dB(A)
- Fire rating
- —
- Airflow
- 26,638 m³/h
- Diameter
- 800 mm
- Power
- 1.1 kW
- Noise
- 77 dB(A)
- Fire rating
- —
- Airflow
- 26,638 m³/h
- Diameter
- 800 mm
- Power
- 1.1 kW
- Noise
- 77 dB(A)
- Fire rating
- —
- Airflow
- 26,956 m³/h
- Diameter
- 900 mm
- Power
- 1.1 kW
- Noise
- 79 dB(A)
- Fire rating
- —
- Airflow
- 26,956 m³/h
- Diameter
- 900 mm
- Power
- 1.1 kW
- Noise
- 79 dB(A)
- Fire rating
- —
- Airflow
- 28,900 m³/h
- Diameter
- 900 mm
- Power
- 3 kW
- Noise
- 81 dB(A)
- Fire rating
- —
- Airflow
- 28,900 m³/h
- Diameter
- 900 mm
- Power
- 3 kW
- Noise
- 81 dB(A)
- Fire rating
- —
- Airflow
- 29,069 m³/h
- Diameter
- 1,000 mm
- Power
- 1.1 kW
- Noise
- 78 dB(A)
- Fire rating
- —
- Airflow
- 29,069 m³/h
- Diameter
- 1,000 mm
- Power
- 1.1 kW
- Noise
- 78 dB(A)
- Fire rating
- —
- Airflow
- 29,373 m³/h
- Diameter
- 800 mm
- Power
- 1.5 kW
- Noise
- 78 dB(A)
- Fire rating
- —
- Airflow
- 29,373 m³/h
- Diameter
- 800 mm
- Power
- 1.5 kW
- Noise
- 78 dB(A)
- Fire rating
- —
- Airflow
- 29,679 m³/h
- Diameter
- 800 mm
- Power
- 4 kW
- Noise
- 84 dB(A)
- Fire rating
- —
- Airflow
- 29,679 m³/h
- Diameter
- 800 mm
- Power
- 4 kW
- Noise
- 84 dB(A)
- Fire rating
- —
- Airflow
- 31,906 m³/h
- Diameter
- 900 mm
- Power
- 1.5 kW
- Noise
- 80 dB(A)
- Fire rating
- —
- Airflow
- 31,906 m³/h
- Diameter
- 900 mm
- Power
- 1.5 kW
- Noise
- 80 dB(A)
- Fire rating
- —
- Airflow
- 31,990 m³/h
- Diameter
- 710 mm
- Power
- 4 kW
- Noise
- 89 dB(A)
- Fire rating
- —
- Airflow
- 31,990 m³/h
- Diameter
- 710 mm
- Power
- 4 kW
- Noise
- 89 dB(A)
- Fire rating
- —
- Airflow
- 31,990 m³/h
- Diameter
- 710 mm
- Power
- 4 kW
- Noise
- 89 dB(A)
- Fire rating
- —
- Airflow
- 32,674 m³/h
- Diameter
- 1,000 mm
- Power
- 4 kW
- Noise
- 83 dB(A)
- Fire rating
- —
- Airflow
- 32,674 m³/h
- Diameter
- 1,000 mm
- Power
- 4 kW
- Noise
- 83 dB(A)
- Fire rating
- —
- Airflow
- 34,047 m³/h
- Diameter
- 900 mm
- Power
- 4 kW
- Noise
- 85 dB(A)
- Fire rating
- —
- Airflow
- 34,047 m³/h
- Diameter
- 900 mm
- Power
- 4 kW
- Noise
- 85 dB(A)
- Fire rating
- —
- Airflow
- 34,798 m³/h
- Diameter
- 710 mm
- Power
- 5.5 kW
- Noise
- 88 dB(A)
- Fire rating
- —
- Airflow
- 35,000 m³/h
- Diameter
- 900 mm
- Power
- 4 kW
- Noise
- 85 dB(A)
- Fire rating
- —
- Airflow
- 35,000 m³/h
- Diameter
- 900 mm
- Power
- 4 kW
- Noise
- 85 dB(A)
- Fire rating
- —
- Airflow
- 35,804 m³/h
- Diameter
- 800 mm
- Power
- 5.5 kW
- Noise
- 86 dB(A)
- Fire rating
- —
- Airflow
- 35,804 m³/h
- Diameter
- 800 mm
- Power
- 5.5 kW
- Noise
- 86 dB(A)
- Fire rating
- —
- Airflow
- 36,994 m³/h
- Diameter
- 1,000 mm
- Power
- 2.2 kW
- Noise
- 81 dB(A)
- Fire rating
- —
- Airflow
- 36,994 m³/h
- Diameter
- 1,000 mm
- Power
- 2.2 kW
- Noise
- 81 dB(A)
- Fire rating
- —
- Airflow
- 37,368 m³/h
- Diameter
- 900 mm
- Power
- 2.2 kW
- Noise
- 81 dB(A)
- Fire rating
- —
- Airflow
- 37,368 m³/h
- Diameter
- 900 mm
- Power
- 2.2 kW
- Noise
- 81 dB(A)
- Fire rating
- —
- Airflow
- 39,732 m³/h
- Diameter
- 1,000 mm
- Power
- 5.5 kW
- Noise
- 85 dB(A)
- Fire rating
- —
- Airflow
- 39,732 m³/h
- Diameter
- 1,000 mm
- Power
- 5.5 kW
- Noise
- 85 dB(A)
- Fire rating
- —
- Airflow
- 40,000 m³/h
- Diameter
- 900 mm
- Power
- 5.5 kW
- Noise
- 99 dB(A)
- Fire rating
- —
- Airflow
- 40,000 m³/h
- Diameter
- 900 mm
- Power
- 5.5 kW
- Noise
- 99 dB(A)
- Fire rating
- —
- Airflow
- 42,404 m³/h
- Diameter
- 900 mm
- Power
- 3 kW
- Noise
- 83 dB(A)
- Fire rating
- —
- Airflow
- 42,404 m³/h
- Diameter
- 900 mm
- Power
- 3 kW
- Noise
- 83 dB(A)
- Fire rating
- —
- Airflow
- 44,027 m³/h
- Diameter
- 1,000 mm
- Power
- 3 kW
- Noise
- 82 dB(A)
- Fire rating
- —
- Airflow
- 44,027 m³/h
- Diameter
- 1,000 mm
- Power
- 3 kW
- Noise
- 82 dB(A)
- Fire rating
- —
- Airflow
- 45,966 m³/h
- Diameter
- 900 mm
- Power
- 5.5 kW
- Noise
- 86 dB(A)
- Fire rating
- —
- Airflow
- 45,966 m³/h
- Diameter
- 900 mm
- Power
- 5.5 kW
- Noise
- 86 dB(A)
- Fire rating
- —
Showing 150 of 161 models — use the selector to filter.
Data per the official NOVOVENT catalogue. Maximum free-air values; final selection at the duty point is confirmed by an IMETCO engineer.