JSI

The Jeven JSI hood has been designed for kitchens where a comfortable, productive and healthy indoor climate is required.
JSI offers draught-free ventilation with first-class working conditions and thermal comfort.

The JSI hood is equipped with exhaust, supply and direction air, with damper plates and measurement taps. Supply air is introduced into the kitchen by supply air columns. Supply air columns ensure controlled and flexible distribution of the supply air.

Modularity makes it easy to vary both the number and positioning of the supply air columns. The actual supply air pattern can be manually adjusted when working near the canopy. In island models the supply air columns can be located on all sides of the hood. The columns and the filters are easy to wash in a dishwasher.

  • Functioning principle of JSI canopies
  • Product code
  • Technical information
  • installation
  • product selection

Functioning principle


  1. Supply air is introduced through the supply air columns
  2. The air pattern can be adjusted at the column
  3. Heat and fumes rise into the hood
  4. Direction air prevents leakage and directs heat and particles towards grease filters
  5. Grease particles are removed in the filter
  6. Clean air is exhausted

jsi functioning principle


Parts


  1. Outer casing
  2. Supply air connection and damper unit
  3. Light fixture with cable
  4. Grease filters and measurement tap for the exhaust air
  5. Direction air unit with measurement tap for the supply air
  6. Exhaust air connection and damper plate
  7. Personal supply air nozzle
  8. Supply air unit
  9. Ceiling console
  10. Hanging bracket

jsi parts img

Product code


jsi product code eng

All Jeven hoods come equipped with lights. Standard JSI hoods are equipped with cyclonic JCE grease filters.

The canopy’s base material is stainless steel AISI 304. The side panels can be made of stainless steel (JSI-R) or laminated glass (JSI-S).

Covering boards to enclose the area between the top of the hood and the ceiling.

Exhaust air


The recommended exhaust airflow rate is max. 340 l/s per 315 mm spigot, with a duct velocity of 4.4 m/s.
By default, the canopies come with a suitable number of filter units so that the pressure level will be between 40 and 60 Pa.
The nominal airflow of the filter units is 60 l/s per filter module.

 

Recommended exhaust flow/ spigot
Spigot size ø Exhaust flow
mm l/s m³/h
200 40-140 145-500
315 140-340 500-1225
400 340-530 1225-1910

Grease filter extraction rate

grease fil extract img


Pressure loss and sound data

pressure loss img

 

Sound Power level, Lw

Sound power level Lw in each octave band is computed by adding the corresponding factor, Kok to the sound power level LpA.
Lw= LpA+Kok.

Factor, Kok

Hz 125 250 500 1000 2000 4000
Kok 6 5 4 -2 -9 -16
tol. ±3 ±3 ±2 ±2 ±3 ±4

Sound attenuation

Exhaust

JCE-2, spigot= ø 200 mm.
Sound attenuation, (dB)

Hz 125 250 500 1000 2000 4000
“Damper closed” 12 7 7 10 10 10
“Damper open” 11 6 6 6 6 5

Exhaust

JCE-4, spigot= ø 315 mm.
Sound attenuation, (dB)

Hz 125 250 500 1000 2000 4000
“Damper closed” 3 5 4 11 10 10
“Damper open” 2 4 3 6 4 7

The average sound attenuation includes the end reflection of the connection spigot.
It is recommended to use “damper open” values when calculating sound attenuation.


Supply air

The canopies are supplied from the factory with suitable air flow rates for a pressure level of 25-35 Pa.

Hood height Supply air unit width, B
mm 200 mm 500 mm
330 50-90 l/s
540 40-70 l/s 100-150 l/s

Pressure loss, Sound data and Throw length / Supply air unit


Spigot ø200 mm. Unit width 500 mm. Hood height 330 mm.

img1

Hz 125 250 500 1000 2000 4000
Kok -2 7 4 -5 -19 -26
tol. ±6 ±4 ±2 ±2 ±3 ±5


Spigot ø160 mm. Unit width 200 mm. Hood height 540 mm.

img2

Hz 125 250 500 1000 2000 4000
Kok -2 1 2 1 -7 -16
tol. ±3 ±3 ±2 ±2 ±3 ±4


Spigot ø250 mm. Unit width 500 mm. Hood height 540 mm.

img3

Hz 125 250 500 1000 2000 4000
Kok 6 8 4 -5 -10 -18
tol. ±3 ±3 ±2 ±2 ±3 ±4

 

The sound power level (Lw) in each octave band is computed by adding the corresponding factor Kok to the sound pressure level (LpA),  Lw= LpA+Kok


Distribution of supply air

Jeven supply air columns deliver a controlled and flexible distribution of the supply air. It is possible to wash the supply air columns in a dishwasher and the inside of the supply air chambers is easy to clean. These columns allow individual adjustment of air patterns and air flows, which means better indoor climate for the kitchen staff.

Tuloilmanjako

  1. Unidirectional throw pattern
  2. Displacement throw pattern
  3. Bidirectional throw pattern

Supply air unit, damper open

Sound attenuation, dB
Hood height Spigot 125 Hz 250 Hz 500 Hz 1000 Hz 2000 Hz 4000 Hz
330 mm ø200 17 10 10 11 18 24
540 mm ø160 24 8 5 12 17 24
540 mm ø250 16 9 7 11 16 23

Installation


The hood shall be installed by hanging bars (f.ex. M8). These bars are not included in the delivery. Holes for the hanging bars should be drilled to the ceiling of the kitchen by using the shown fixture points.
Recommended height position of the hood is 2100-2200 mm.
Install plastic protective corner profiles on the lower end.
Hood install


K-coefficient exhaust air

jsi se img

Number of filter modules 1 pcs 2 pcs 3 pcs 4 pcs 5 pcs 6 pcs 7 pcs 8 pcs
K1(m³/h) 34,6 72,4 104 141 176 207 245 282
K2(l/s) 9,62 20,1 28,8 39,2 48,9 57,6 68,0 78,4
Q=Kx√Pm Pm=(Q/K)²Pa

 


K-coefficient supply air


 Width,mm  200  200  500  500
 Height, mm  290  500  290  500
 K1(m³/h)  45,0  77,0  96,0  192
 K2(l/s)  12,5  21,4  26,7  53,3
 Q=Kx√Pm       Pm=(Q/K)²Pa    

Cleaning


The cleaning intervals of the filters depends on the type of cooking. In general filters should be cleaned when they appear to be dirty. The filter modules should be removed (one by one) by sliding them out of the filter housing although care should be taken not to spill the contents. When handling any components of a canopy it is imperative that person wears a proper, gripping, cut-resistant work gloves for protection against metal edges.

Wall surfaces are cleaned in connection with the kitchen normal cleaning or if necessary separately. Cleaning is carried out with detergent for stainless steel surfaces.

Fascias should be cleaned during normal kitchen cleaning. About twice a year it is advisable to detach the fascias and wash them in a commercial dishwasher. Fascias are easy to detach by lifting them up, tilting the lower edge towards you and then lowering the fascia out of the canopy.

Cleaning of filters

DIMENSIONS OF JSI HOODS


Hoods length, width and C, E dimensions can be chosen freely.
Max. module size is 3000 mm x 1800 mm.
Filters require 440 mm of free space to open.

B (mm) Height (mm) F (mm) øD G (mm) E min (mm) K min(mm) M (mm)
200 540 500 160 100 400 340 65
500 330 290 200 125 550 350 110
500 540 500 250 150 550 350 110

 

Wall hood

jsi img wall placement

Island type hood

jsi island placement


Positioning of the hood

The size of the canopy is determined by the size of the kitchen equipment. The overhang depends on the type of equipment and the distance between the hood and the equipment. For this type of equipment, the overhang should be at least 300 mm. The typical distance between the hood side and the floor is 2100-2200 mm.

If the equipment has any doors that open upwards, make sure there is enough distance to the canopy.

jsi positioning img

Calculation of air flows

Design Service