IF
YOU ARE SELECTING
ONE OF OUR HOOD
PACKAGES, WE
ENCOURAGE YOU
TO CONSULT
WITH OUR TECHNICAL
STAFF.
However,
you will find
the following
guidelines
useful if you
feel confident
that you know
your technical
criteria.
The information
in this section
will help you
understand the
basic information
required
to spec your
project.
|
TECHNICAL
PROCEDURE FOR
HOOD SELECTION AND
INSTALLATION |
1. |
Determine
the overall length
and depth of hood(s)
by adding the
lengths of all
the appliances
and using the
width of the deepest
appliance that
will be set
under the hood
in the cooking
area. Add a minimum
of 6" to
front dimension
and 6" left
and right (total
12") beyond
the actual equipment
total length.
This is the length
of hood you will
need, the width
is generally standard
48", but
if you have a
wider appliance
than 42" you
will need a custom
hood width. |
2. |
Measure
the height from
floor to room
ceiling (not roof
ceiling). This
measurement will
determine whether
you will need
a low profile
hood or can utilize
the standard box
style design.
Typically you
will require a
minimum clearance
of 9' from floor
to ceiling for
a standard installation. |
3. |
Select the appropriate
model (wall or
island). Next
consider the benefits
of Make Up Air
for your project,
figuring utility
cost savings and
comfort, and
actual air change
available (size
of kitchen). Make
Up Air is always
a recommended
option, and may
be required by
Code compliance
for some projects. You
may consider at
this point the
efficiency
and desirability
of Heated (Tempered)
Make Up Air. |
|
To select
the correct
exhaust fan
and supply
unit, it is
advisable to
consult with
our technical
staff. They
know how to
analyze variables
in static pressure,
HP, weight and
air flow to
create the most
efficient ventilation
for your kitchen.
Also, chargrilling
and deep grease
fryers require
more exhaust
than for stoves,
ovens and dishwashers.
However,
you can determine
a preliminary
CFM range required
for your exhaust
and supply
air using the
following information:
A basic CFM
calculation
approximates 250 CFM
required per foot
length of
Hood.
Example: A 10' Hood
will require an Exhaust
Fan that can move
2500 CFM (250 x 10=2500).
Your Supply
Air CFM requirement
is approximated
at 80% of
the Exhaust CFM.
Example: A
10' Hood requires
2500 CFM Exhaust and 2000
CFM Supply Air (2500x80%=2000). |
5. |
Determine if
the fan curb must
be insulated,
and if insulated
paneling is required
by Code compliance,
by analyzing the
combustibility
of wall or roof
using Combustibility
Chart  |
6. |
Determine relative
length of duct
by measuring the
length of space
between the top
or back of hood
to point of exhaust
(roof deck or
wall). |
7.
|
Select Optional equipment
and materials
(pre-piped automatic
fire suppression
system, stainless
steel and/or
diamond pattern
backsplash,
any additional
trim or skirting).
Most local fire
codes and NSF
require a cleanable
surface behind
the cooking appliances.
If fire suppression
system is selected,
you will need
a certified
fire system
technician for
final hookup.
The installer
will need to
know your gas
line size
and a completed
equipment schedule
and/or drawing
of the equipment
types and
their placement
in the kitchen
to be protected.
Click here for
an easy Equipment
Schedule Form for you to print
and complete
for your installer. |
| |