Spring Air Systems Rev Low Engineering Manual page 18

Island REV LOW Hoods
The Island Revlow Hood exhaust air formula is as follows:
Once the cooking line up has been established, the TOTAL EXHAUST (TEX) is calculated by
adding each individual NEV valve.
TEX = (NEV of appliance No. 1 + NEV of appliance No. 2 + NEV of appliance No. 3 +..)x 1.10
Refer to Chart No. 4 for NEV of various appliances.
The TOTAL EXHAUST (TEX) is determined by adding the NET EXHAUST VOLUME (NEV) CFM
(l/s) for each individual cooking appliance and then multiplying by a factor of 1.1. The NET
EXHAUST VOLUME (NEV) for individual appliances varies depending on the amount of smoke,
particulate, and grease generated, the surface temperature and whether the appliance is gas or
electric. Gas appliances require higher NEV because of the high flue gas temperatures. Chart
No.4 includes typical "NEV" values for most cooking applications. Consult the factory if an
appliance is not listed.
It is important to know the dimensions of each appliance. The NET EXHAUST VOLUME (NEV)
decreases and increases proportionally to the length of some appliances. These appliances are
indicated in Chart No. 4 with length dimensions. For lengths other than indicated prorate the
value in the chart.
Determining REV LOW Island Hood Dimensions
Hood Length:
The hood length should equal the width of all the cooking appliances to be covered by the hood
plus allow and additional 9" (230 mm) overhang on either end of the cooking line up.
NOTE 2
NOTE 2
PLAN VIEW
NOTES:
1. EXHAUST DUCT COLLAR WITH 1" (25mm) PERIMETER FLANGE.
2. MINIMUM WIDTH 54" (1372mm).
3. MAXIMUM LENGTH 14'-0" (4267mm). FOR GREATER LENGTH
USE MULTIPLE UNITS.
4. HANGER ROD BY INSTALLER.
RECOMMENDED MOUNTING HEIGHT 6'6" (1980) FROM FINISHED FLOOR.
5.
6. TYPICAL HANGER ROD BRACKET LOCATION - 4 SUPPLIED.
7. DUCT LENGTH TO SUIT EXHAUST VOLUME.
8. STAINLESS STEEL GREASE CUP.
9. REMOVEABLE GREASE INSERT.
10. VARIFLOW BAFFLES.
Typical Island REV LOW dimensional drawing model DD-B-F-I
16 ______________________________________________________________________
Spring Air Systems REV LOW Engineering Manual Revision 2.0 -021902
NOTE 3
NOTE 6
NOTE 7
Two Hoods shown Figure 17
NOTE 4
NOTE 9
NOTE 10
NOTE 8
APPLIANCES
SECTION VIEW
_
10.00 (254)
41.00
3.00 (76)
(1041)
3.00(76)
23.00
(584)
NOTE 5
APPLIANCES