Top ventilation for top chefs

Ufojet

Ufojet is designed specifically for out blowing the moist exhaust air on the roof of the buildings.

Ufojet includes the outer casing, air flow guidance rings and top cap, which is isolated and could be used as an access door.
The air is blown upwards with a high velocity and small pressure loss.
The unique construction of the Ufojet prevents water penetrating into the duct system and the inside of the unit from freezing.

DIMENSIONS

Size ø Dø dø BACHAir flow ratePressure lossWeight
 160 555 172 320 100 180 420 100-200 l/s 30-100 Pa 5 kg
 200 555 212 320 100 180 420 150-300 l/s 25-90 Pa 5 kg
 250 555 262 320 100 180 420 200-400 l/s 25-100 Pa 5 kg
 315 850 327 495 120 270 615 400-700 l/s 25-70 Pa 10 kg
 400 850 412 495 120 270 615 700-1000 l/s 30-80 Pa 10 kg
 500 1065 512 615 120 300 735 1000-1600 l/s 30-80 Pa 15 kg
 630 1460 642 765 120 350 995 1600-2600 l/s 35-80 Pa 25 kg
 800 1460 812 765 120 350 995 2600-5000 l/s 30-120 Pa 25 kg

Ufojet is supplied as standard with a round connection and it is very easy to install on the channel.

TECHNICAL INFORMATION

Pressure loss and sound data

Effect of distance on sound pressure level

5 m sound pressure level decreases 7 dB(A)
10 m sound pressure level decreases 23 dB(A)
15 m sound pressure level decreases 29 dB(A)

Etäisyyden vaikutus äänenpainetasoon

5 m äänenpainetaso alenee 7 dB(A)
10 m äänenpainetaso alenee 23 dB(A)
15 m äänenpainetaso alenee 29 dB(A)


Velocity of out blowing

Duct sizek
 ø200 0,092
 ø250 0,120
 ø315 0.252
 ø400 0,304
 ø500 0,548
 ø630 0,852
 ø800 1,380

Formula for velocity of out blowing:

v= velocity of out blowing, m/s
d= duct diameter, m
p= total pressure loss, Pa
k= coefficient

The airs out blowing rate at the rectangular channel can be calculated using the same formula.


Sound attenuation
Sound attenuation, dB by octave bands (63-8000 Hz) ISO 7235

Size63125250500100020004000800
 200 4 3 3 5 3 2 4 6
 250 3 2 2 4 3 3 3 6
 315 2 2 1 2 2 2 2 4
 400 2 2 1 2 2 2 1 4
 500 1 2 2 1 2 1 1 4
 630 1 1 2 1 1 1 1 3
 800 1 1 2 1 1 1 1 3

Product info

  • Ufojet Out Blowing Hood

    Product Brochure

Product code

UFOJET400MAKL

Ufojet construction includes also air flow measurement tap.
The standard material for the Ufojet is marine-grade aluminum.
It is also available in stainless steel (RST) and painted (RAL colors).

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