ModelAirflow (m³/h)DiameterPowerNoiseFire rating
- Airflow
- 1,906 m³/h
- Diameter
- 315 mm
- Power
- 0.12 kW
- Noise
- 54 dB(A)
- Fire rating
- —
- Airflow
- 1,906 m³/h
- Diameter
- 315 mm
- Power
- 0.12 kW
- Noise
- 54 dB(A)
- Fire rating
- —
- Airflow
- 2,075 m³/h
- Diameter
- 315 mm
- Power
- 0.09 kW
- Noise
- 57 dB(A)
- Fire rating
- —
- Airflow
- 2,075 m³/h
- Diameter
- 315 mm
- Power
- 0.12 kW
- Noise
- 57 dB(A)
- Fire rating
- —
- Airflow
- 2,075 m³/h
- Diameter
- 315 mm
- Power
- 0.12 kW
- Noise
- 57 dB(A)
- Fire rating
- —
- Airflow
- 2,451 m³/h
- Diameter
- 315 mm
- Power
- 0.12 kW
- Noise
- 56 dB(A)
- Fire rating
- —
- Airflow
- 2,451 m³/h
- Diameter
- 315 mm
- Power
- 0.12 kW
- Noise
- 56 dB(A)
- Fire rating
- —
- Airflow
- 2,535 m³/h
- Diameter
- 315 mm
- Power
- 0.12 kW
- Noise
- 61 dB(A)
- Fire rating
- —
- Airflow
- 2,732 m³/h
- Diameter
- 355 mm
- Power
- 0.09 kW
- Noise
- 58 dB(A)
- Fire rating
- —
- Airflow
- 2,732 m³/h
- Diameter
- 355 mm
- Power
- 0.09 kW
- Noise
- 58 dB(A)
- Fire rating
- —
- Airflow
- 2,732 m³/h
- Diameter
- 355 mm
- Power
- 0.09 kW
- Noise
- 58 dB(A)
- Fire rating
- —
- Airflow
- 3,512 m³/h
- Diameter
- 355 mm
- Power
- 0.12 kW
- Noise
- 60 dB(A)
- Fire rating
- —
- Airflow
- 3,512 m³/h
- Diameter
- 355 mm
- Power
- 0.12 kW
- Noise
- 60 dB(A)
- Fire rating
- —
- Airflow
- 3,512 m³/h
- Diameter
- 355 mm
- Power
- 0.12 kW
- Noise
- 60 dB(A)
- Fire rating
- —
- Airflow
- 3,545 m³/h
- Diameter
- 500 mm
- Power
- 0.25 kW
- Noise
- 73 dB(A)
- Fire rating
- —
- Airflow
- 3,832 m³/h
- Diameter
- 400 mm
- Power
- 0.09 kW
- Noise
- 62 dB(A)
- Fire rating
- —
- Airflow
- 3,832 m³/h
- Diameter
- 400 mm
- Power
- 0.12 kW
- Noise
- 62 dB(A)
- Fire rating
- —
- Airflow
- 3,832 m³/h
- Diameter
- 400 mm
- Power
- 0.12 kW
- Noise
- 62 dB(A)
- Fire rating
- —
- Airflow
- 3,946 m³/h
- Diameter
- 450 mm
- Power
- 0.18 kW
- Noise
- 62 dB(A)
- Fire rating
- —
- Airflow
- 3,946 m³/h
- Diameter
- 450 mm
- Power
- 0.18 kW
- Noise
- 62 dB(A)
- Fire rating
- —
- Airflow
- 4,012 m³/h
- Diameter
- 315 mm
- Power
- 0.8 kW
- Noise
- 74 dB(A)
- Fire rating
- —
- Airflow
- 4,754 m³/h
- Diameter
- 450 mm
- Power
- 0.18 kW
- Noise
- 60 dB(A)
- Fire rating
- —
- Airflow
- 4,754 m³/h
- Diameter
- 450 mm
- Power
- 0.18 kW
- Noise
- 65 dB(A)
- Fire rating
- —
- Airflow
- 4,754 m³/h
- Diameter
- 450 mm
- Power
- 0.18 kW
- Noise
- 65 dB(A)
- Fire rating
- —
- Airflow
- 4,783 m³/h
- Diameter
- 400 mm
- Power
- 0.12 kW
- Noise
- 64 dB(A)
- Fire rating
- —
- Airflow
- 4,783 m³/h
- Diameter
- 400 mm
- Power
- 0.12 kW
- Noise
- 64 dB(A)
- Fire rating
- —
- Airflow
- 4,783 m³/h
- Diameter
- 400 mm
- Power
- 0.12 kW
- Noise
- 64 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
- 0.8 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
- 5,361 m³/h
- Diameter
- 560 mm
- Power
- 0.37 kW
- Noise
- 76 dB(A)
- Fire rating
- —
- Airflow
- 5,800 m³/h
- Diameter
- 500 mm
- Power
- 0.3 kW
- Noise
- 62 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
- 6,148 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
- 66 dB(A)
- Fire rating
- —
- Airflow
- 6,334 m³/h
- Diameter
- 450 mm
- Power
- 0.25 kW
- Noise
- 66 dB(A)
- Fire rating
- —
- Airflow
- 6,508 m³/h
- Diameter
- 450 mm
- Power
- 0.37 kW
- Noise
- 62 dB(A)
- Fire rating
- —
- Airflow
- 6,508 m³/h
- Diameter
- 450 mm
- Power
- 0.37 kW
- Noise
- 67 dB(A)
- Fire rating
- —
- Airflow
- 6,508 m³/h
- Diameter
- 450 mm
- Power
- 0.37 kW
- Noise
- 67 dB(A)
- Fire rating
- —
- Airflow
- 6,657 m³/h
- Diameter
- 560 mm
- Power
- 0.18 kW
- Noise
- 56 dB(A)
- Fire rating
- —
- Airflow
- 6,884 m³/h
- Diameter
- 560 mm
- Power
- 0.37 kW
- Noise
- 74 dB(A)
- Fire rating
- —
- Airflow
- 6,995 m³/h
- Diameter
- 630 mm
- Power
- 0.75 kW
- Noise
- 70 dB(A)
- Fire rating
- —
- Airflow
- 6,995 m³/h
- Diameter
- 630 mm
- Power
- 0.75 kW
- Noise
- 70 dB(A)
- Fire rating
- —
- Airflow
- 7,308 m³/h
- Diameter
- 450 mm
- Power
- 0.37 kW
- Noise
- 70 dB(A)
- Fire rating
- —
- Airflow
- 7,308 m³/h
- Diameter
- 450 mm
- Power
- 0.37 kW
- Noise
- 70 dB(A)
- Fire rating
- —
- Airflow
- 7,464 m³/h
- Diameter
- 560 mm
- Power
- 0.3 kW
- Noise
- 68 dB(A)
- Fire rating
- —
- Airflow
- 7,648 m³/h
- Diameter
- 500 mm
- Power
- 0.18 kW
- Noise
- 64 dB(A)
- Fire rating
- —
- Airflow
- 7,648 m³/h
- Diameter
- 500 mm
- Power
- 0.18 kW
- Noise
- 71 dB(A)
- Fire rating
- —
- Airflow
- 7,648 m³/h
- Diameter
- 500 mm
- Power
- 0.18 kW
- Noise
- 71 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
- 8,118 m³/h
- Diameter
- 560 mm
- Power
- 0.25 kW
- Noise
- 57 dB(A)
- Fire rating
- —
- Airflow
- 8,740 m³/h
- Diameter
- 500 mm
- Power
- 0.37 kW
- Noise
- 65 dB(A)
- Fire rating
- —
- Airflow
- 8,740 m³/h
- Diameter
- 500 mm
- Power
- 0.37 kW
- Noise
- 70 dB(A)
- Fire rating
- —
- Airflow
- 8,797 m³/h
- Diameter
- 560 mm
- Power
- 0.55 kW
- Noise
- 74 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
- 8,882 m³/h
- Diameter
- 400 mm
- Power
- 1.5 kW
- Noise
- 80 dB(A)
- Fire rating
- —
- Airflow
- 8,986 m³/h
- Diameter
- 560 mm
- Power
- 0.3 kW
- Noise
- 67 dB(A)
- Fire rating
- —
- Airflow
- 9,180 m³/h
- Diameter
- 500 mm
- Power
- 2.2 kW
- Noise
- 87 dB(A)
- Fire rating
- —
- Airflow
- 9,230 m³/h
- Diameter
- 560 mm
- Power
- 0.37 kW
- Noise
- 57 dB(A)
- Fire rating
- —
- Airflow
- 9,276 m³/h
- Diameter
- 630 mm
- Power
- 0.25 kW
- Noise
- 60 dB(A)
- Fire rating
- —
- Airflow
- 9,635 m³/h
- Diameter
- 560 mm
- Power
- 0.75 kW
- Noise
- 75 dB(A)
- Fire rating
- —
- Airflow
- 9,635 m³/h
- Diameter
- 560 mm
- Power
- 0.75 kW
- Noise
- 75 dB(A)
- Fire rating
- —
- Airflow
- 9,774 m³/h
- Diameter
- 630 mm
- Power
- 0.3 kW
- Noise
- 63 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
- 9,989 m³/h
- Diameter
- 400 mm
- Power
- 2.2 kW
- Noise
- 82 dB(A)
- Fire rating
- —
- Airflow
- 10,087 m³/h
- Diameter
- 560 mm
- Power
- 0.55 kW
- Noise
- 65 dB(A)
- Fire rating
- —
- Airflow
- 10,328 m³/h
- Diameter
- 710 mm
- Power
- 0.37 kW
- Noise
- 63 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
- 10,598 m³/h
- Diameter
- 560 mm
- Power
- 0.75 kW
- Noise
- 74 dB(A)
- Fire rating
- —
- Airflow
- 10,800 m³/h
- Diameter
- 630 mm
- Power
- 0.55 kW
- Noise
- 68 dB(A)
- Fire rating
- —
- Airflow
- 10,925 m³/h
- Diameter
- 500 mm
- Power
- 0.55 kW
- Noise
- 66 dB(A)
- Fire rating
- —
- Airflow
- 10,925 m³/h
- Diameter
- 500 mm
- Power
- 0.55 kW
- Noise
- 55 dB(A)
- Fire rating
- —
- Airflow
- 11,430 m³/h
- Diameter
- 500 mm
- Power
- 3 kW
- Noise
- 87 dB(A)
- Fire rating
- —
- Airflow
- 11,589 m³/h
- Diameter
- 630 mm
- Power
- 0.37 kW
- Noise
- 61 dB(A)
- Fire rating
- —
- Airflow
- 12,048 m³/h
- Diameter
- 560 mm
- Power
- 1.1 kW
- Noise
- 66 dB(A)
- Fire rating
- —
- Airflow
- 12,300 m³/h
- Diameter
- 560 mm
- Power
- 0.75 kW
- Noise
- 66 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
- 3.1 kW
- Noise
- 85 dB(A)
- Fire rating
- —
- Airflow
- 12,384 m³/h
- Diameter
- 630 mm
- Power
- 0.55 kW
- Noise
- 61 dB(A)
- Fire rating
- —
- Airflow
- 13,254 m³/h
- Diameter
- 710 mm
- Power
- 0.55 kW
- Noise
- 67 dB(A)
- Fire rating
- —
- Airflow
- 13,629 m³/h
- Diameter
- 630 mm
- Power
- 0.75 kW
- Noise
- 69 dB(A)
- Fire rating
- —
- Airflow
- 13,985 m³/h
- Diameter
- 560 mm
- Power
- 1.1 kW
- Noise
- 66 dB(A)
- Fire rating
- —
- Airflow
- 14,183 m³/h
- Diameter
- 500 mm
- Power
- 3 kW
- Noise
- 83 dB(A)
- Fire rating
- —
- Airflow
- 14,298 m³/h
- Diameter
- 630 mm
- Power
- 0.55 kW
- Noise
- 69 dB(A)
- Fire rating
- —
- Airflow
- 14,446 m³/h
- Diameter
- 630 mm
- Power
- 1.1 kW
- Noise
- 72 dB(A)
- Fire rating
- —
- Airflow
- 14,446 m³/h
- Diameter
- 630 mm
- Power
- 1.1 kW
- Noise
- 72 dB(A)
- Fire rating
- —
- Airflow
- 14,968 m³/h
- Diameter
- 800 mm
- Power
- 0.55 kW
- Noise
- 70 dB(A)
- Fire rating
- —
- Airflow
- 15,095 m³/h
- Diameter
- 630 mm
- Power
- 1.1 kW
- Noise
- 74 dB(A)
- Fire rating
- —
- Airflow
- 15,095 m³/h
- Diameter
- 630 mm
- Power
- 1.1 kW
- Noise
- 74 dB(A)
- Fire rating
- —
- Airflow
- 15,208 m³/h
- Diameter
- 630 mm
- Power
- 1.5 kW
- Noise
- 77 dB(A)
- Fire rating
- —
- Airflow
- 15,208 m³/h
- Diameter
- 630 mm
- Power
- 1.5 kW
- Noise
- 77 dB(A)
- Fire rating
- —
- Airflow
- 15,648 m³/h
- Diameter
- 710 mm
- Power
- 1.1 kW
- Noise
- 72 dB(A)
- Fire rating
- —
- Airflow
- 15,652 m³/h
- Diameter
- 710 mm
- Power
- 0.75 kW
- Noise
- 62 dB(A)
- Fire rating
- —
- Airflow
- 15,698 m³/h
- Diameter
- 710 mm
- Power
- 0.55 kW
- Noise
- 73 dB(A)
- Fire rating
- —
- Airflow
- 16,577 m³/h
- Diameter
- 790 mm
- Power
- 0.37 kW
- Noise
- 67 dB(A)
- Fire rating
- —
- Airflow
- 16,936 m³/h
- Diameter
- 630 mm
- Power
- 1.5 kW
- Noise
- 77 dB(A)
- Fire rating
- —
- Airflow
- 16,936 m³/h
- Diameter
- 630 mm
- Power
- 1.5 kW
- Noise
- 77 dB(A)
- Fire rating
- —
- Airflow
- 17,088 m³/h
- Diameter
- 630 mm
- Power
- 1.1 kW
- Noise
- 70 dB(A)
- Fire rating
- —
- Airflow
- 17,481 m³/h
- Diameter
- 560 mm
- Power
- 1.5 kW
- Noise
- 65 dB(A)
- Fire rating
- —
- Airflow
- 18,200 m³/h
- Diameter
- 710 mm
- Power
- 0.75 kW
- Noise
- 74 dB(A)
- Fire rating
- —
- Airflow
- 18,535 m³/h
- Diameter
- 800 mm
- Power
- 0.75 kW
- Noise
- 72 dB(A)
- Fire rating
- —
- Airflow
- 18,700 m³/h
- Diameter
- 630 mm
- Power
- 1.5 kW
- Noise
- 70 dB(A)
- Fire rating
- —
- Airflow
- 19,403 m³/h
- Diameter
- 630 mm
- Power
- 1.5 kW
- Noise
- 76 dB(A)
- Fire rating
- —
- Airflow
- 19,403 m³/h
- Diameter
- 630 mm
- Power
- 1.5 kW
- Noise
- 76 dB(A)
- Fire rating
- —
- Airflow
- 19,547 m³/h
- Diameter
- 710 mm
- Power
- 1.5 kW
- Noise
- 71 dB(A)
- Fire rating
- —
- Airflow
- 19,614 m³/h
- Diameter
- 800 mm
- Power
- 1.1 kW
- Noise
- 64 dB(A)
- Fire rating
- —
- Airflow
- 19,889 m³/h
- Diameter
- 710 mm
- Power
- 2.2 kW
- Noise
- 76 dB(A)
- Fire rating
- —
- Airflow
- 19,889 m³/h
- Diameter
- 710 mm
- Power
- 2.2 kW
- Noise
- 76 dB(A)
- Fire rating
- —
- Airflow
- 20,295 m³/h
- Diameter
- 710 mm
- Power
- 1.5 kW
- Noise
- 62 dB(A)
- Fire rating
- —
- Airflow
- 20,963 m³/h
- Diameter
- 630 mm
- Power
- 1.5 kW
- Noise
- 70 dB(A)
- Fire rating
- —
- Airflow
- 21,465 m³/h
- Diameter
- 900 mm
- Power
- 0.75 kW
- Noise
- 75 dB(A)
- Fire rating
- —
- Airflow
- 21,938 m³/h
- Diameter
- 630 mm
- Power
- 2.2 kW
- Noise
- 79 dB(A)
- Fire rating
- —
- Airflow
- 21,938 m³/h
- Diameter
- 630 mm
- Power
- 2.2 kW
- Noise
- 79 dB(A)
- Fire rating
- —
- Airflow
- 22,139 m³/h
- Diameter
- 560 mm
- Power
- —
- Noise
- 4 dB(A)
- Fire rating
- —
- Airflow
- 22,963 m³/h
- Diameter
- 710 mm
- Power
- 2.2 kW
- Noise
- 82 dB(A)
- Fire rating
- —
- Airflow
- 22,963 m³/h
- Diameter
- 710 mm
- Power
- 2.2 kW
- Noise
- 82 dB(A)
- Fire rating
- —
- Airflow
- 23,499 m³/h
- Diameter
- 630 mm
- Power
- —
- Noise
- 3 dB(A)
- Fire rating
- —
- Airflow
- 23,529 m³/h
- Diameter
- 900 mm
- Power
- 1.1 kW
- Noise
- 67 dB(A)
- Fire rating
- —
- Airflow
- 23,559 m³/h
- Diameter
- 800 mm
- Power
- 1.5 kW
- Noise
- 66 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
- 84 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
- 710 mm
- Power
- 2.2 kW
- Noise
- 71 dB(A)
- Fire rating
- —
- Airflow
- 24,423 m³/h
- Diameter
- 710 mm
- Power
- 2.2 kW
- Noise
- 81 dB(A)
- Fire rating
- —
- Airflow
- 24,423 m³/h
- Diameter
- 710 mm
- Power
- 2.2 kW
- Noise
- 81 dB(A)
- Fire rating
- —
- Airflow
- 24,599 m³/h
- Diameter
- 560 mm
- Power
- 5.5 kW
- Noise
- 81 dB(A)
- Fire rating
- —
- Airflow
- 25,580 m³/h
- Diameter
- 800 mm
- Power
- 3 kW
- Noise
- 79 dB(A)
- Fire rating
- —
- Airflow
- 26,087 m³/h
- Diameter
- 710 mm
- Power
- 2.2 kW
- Noise
- 71 dB(A)
- Fire rating
- —
- Airflow
- 26,095 m³/h
- Diameter
- 800 mm
- Power
- 4 kW
- Noise
- 79 dB(A)
- Fire rating
- —
- Airflow
- 26,095 m³/h
- Diameter
- 800 mm
- Power
- 4 kW
- Noise
- 79 dB(A)
- Fire rating
- —
- Airflow
- 26,638 m³/h
- Diameter
- 800 mm
- Power
- 1.1 kW
- Noise
- 74 dB(A)
- Fire rating
- —
- Airflow
- 26,956 m³/h
- Diameter
- 900 mm
- Power
- 1.1 kW
- Noise
- 77 dB(A)
- Fire rating
- —
- Airflow
- 27,291 m³/h
- Diameter
- 800 mm
- Power
- 2.2 kW
- Noise
- 65 dB(A)
- Fire rating
- —
- Airflow
- 27,542 m³/h
- Diameter
- 800 mm
- Power
- 2.2 kW
- Noise
- 73 dB(A)
- Fire rating
- —
- Airflow
- 27,858 m³/h
- Diameter
- 900 mm
- Power
- 1.5 kW
- Noise
- 68 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
- 28,928 m³/h
- Diameter
- 560 mm
- Power
- 7.5 kW
- Noise
- 81 dB(A)
- Fire rating
- —
- Airflow
- 28,970 m³/h
- Diameter
- 990 mm
- Power
- 0.75 kW
- Noise
- 69 dB(A)
- Fire rating
- —
- Airflow
- 28,997 m³/h
- Diameter
- 710 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
- 29,645 m³/h
- Diameter
- 800 mm
- Power
- —
- Noise
- 3 dB(A)
- Fire rating
- —
- Airflow
- 29,679 m³/h
- Diameter
- 800 mm
- Power
- 4 kW
- Noise
- 82 dB(A)
- Fire rating
- —
- Airflow
- 29,679 m³/h
- Diameter
- 800 mm
- Power
- 4 kW
- Noise
- 82 dB(A)
- Fire rating
- —
- Airflow
- 30,544 m³/h
- Diameter
- 800 mm
- Power
- 4 kW
- Noise
- 80 dB(A)
- Fire rating
- —
Showing 150 of 246 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.