VentAHood Ventilation Hood Models Equipped with K250... User manual

SPECIFICATION PROCEDURES
(also see the separate installation do’s and don’ts and installation instructions)
The purpose of any kitchen ventilation system is to completely remove the cooking contaminants of heat,
steam, grease, smoke, odors and hazardous gases, before they have a chance to mix with the air in the rest of
the home.
Range hoods and liners must be properly designed and installed in order for them to be
effective. No manufacturers exhaust system will work properly if it is poorly designed and/or
improperly installed. If a Vent-A-Hood does not seem to be working properly, there could be a
mechanical problem with the hood, but that is by far the least likely cause. Vent-A-Hood, properly
specified and installed, works - period!
Poor design and/or improper installation are the first places to look if the ventilator is not removing the
cooking pollutants.
The first step in specifying a range hood or liner (hereafter, rh/l) involves answering these two questions:
1). What type of cooking equipment is involved?
A standard gas appliance.
A standard electric appliance.
A professional-style gas appliance.
2). What type of rh/l is required?
Undercabinet
Wall Mount
Island
Metal liner for a wood hood (wall mount or island?)
The second step is to arrive at physical specifications relating to the six performance variables outlined below.
These critical variables interact with one another and a deficiency in any one of these areas can cause a rh/l to
perform poorly.
1). Height
Capture area is very important in rh/l performance, especially with professional-style appliances.
Generally, taller rh/l have more capture area than shorter ones. Rh/l height is determined by the type of
appliance under it, by the height of the ceiling and anything that may be above the rh/l such as a soffit, cabinet
or duct cover.
2). Width
A rh/l should never be narrower than the appliance it is ventilating.
Wherever possible, undercabinet and wall mount rh/l should overlap standard appliances by 3”-6” on
each side.
Island rh/l and rh/l over professional-style appliances must overlap by at least 3” on each side.
3). Depth
Rh/l should be deep enough to fully cover all burners.
6” tall undercabinet rh/l must not be used over professional-style appliances.
9” tall undercabinet hoods should not be installed over professional-style appliances exceeding 30” in
width. Some situations, such as a corner installation, may require a non-standard depth.
Wall mount rh/l should be 24” deep for standard appliances and most professional-style appliances. A
27” depth is required for some professional-style appliances. Some situations, such as a corner
installation, may require a non-standard depth.
Island rh/l should be 27” deep for standard appliances and 30” deep for professional-style appliances.
4). Proximity
For best performance, there is a maximum height at which rh/l should be installed.
6” tall undercabinet rh/l should be mounted with the bottom 21”-24” above the cooking surface.
9” tall undercabinet hoods should be mounted with the bottom 24”-27” above the cooking surface.
Wall mount and island rh/l should be mounted with the bottom no higher than 30” above the cooking
surface.
(Cont’d)

(SPECIFICATION PROCEDURES Cont’d)
5). Blower Configuration
Customers cooking habits and expectations of their ventilation equipment vary. The recommendations
in the table below will provide excellent results under a majority of situations. Customers desiring the highest
possible removal of cooking contaminants should contact a Vent-A-Hood dealer for a consultation.
HOOD/LINER
TYPE
COOKING
EQUIPMENT
TYPE
USAGES
L = Light
M = Medium
H = Heavy *
MULTI-BURNER
COOKTOP
RATING
BBQ, WOK or
GRIDDLE
MAGIC LUNG®
BLOWER(S) **
EQUIVALENT
CFM **
“K-Series”
Standard gas
Standard electric
No
L/M
12,000 WATTS
Do Not Use!
240 CFM
single blower
360 CFM
“Classic”, SLH6,
6” tall undercabinet
Standard gas
Standard electric
L
L/M
Do Not Use!
9” tall undercabinet
or wall mount
Standard gas
Standard electric
L
L/M
20,000-30,000 BTU
12,000 WATTS
20,000 BTU
12,000 WATTS
300 CFM
(B100 single blower)
450 CFM
9” tall undercabinet
Standard gas
Standard electric
30” Pro-style
M/H
H
L
Standard gas
Standard electric
30” Pro-style
36” Pro-style
M/H
H
L/M
L
40,000-60,000 BTU
24,000 WATTS
40,000 BTU
24,000 WATTS
600 CFM
(B200 dual blower)
900 CFM
36” Pro-style
48” Pro-style
M/H
L/M
60,000-90,000 BTU
36,000 WATTS
60,000 BTU
36,000 WATTS
900 CFM ( One B100
single blower plus one
B200 dual blower)
1350 CFM
Wall Mount
48” Pro-style
60” Pro-style
H
All
80,000-120,000 BTU
48,000 WATTS
80,000 BTU
48,000 WATTS
1200 CFM (Two B200
dual blowers)
1800 CFM
Standard gas
Standard electric
30” Pro-style
36” Pro-style
All
All
L/M
L
40,000-60,000 BTU
24,000 WATTS
40,000 BTU
24,000 WATTS
550 CFM
(T200 island dual blower)
900 CFM
Island
36” Pro-style
48” - 60” Pro-style
M/H
All
80,000-120,000 BTU
48,000 WATTS
80,000 BTU
48,000 WATTS
1100 CFM (T400 island
cluster blower)
1800 CFM
*Heavy usage on a standard appliance is defined as 3-4 burners frequently in use, canning, wok cooking, frying,
grill/griddle in cooktop.
*Heavy usage on a professional appliance is defined by the appliance itself and the customers cooking practices. To help
with decisions about blower capacity, a good rule of thumb is that a single, 300 CFM Magic Lung®blower will handle up to
20,000 BTU’s.
** CFM ratings, for hoods using mesh or baffle filters, are overstated by approximately 1/3 because they are tested
without the filters in place. A mesh or baffle filtered hood, rated at 450 CFM, actually delivers only about 300 CFM of
airflow after the filters are placed in the air stream.
Because it uses a centrifugal filtration system with nothing to obstruct the airflow, the Vent-A-Hood Magic Lung®
blower is much more efficient, delivering airflow equivalent to a “filtered” hood - but with a lower CFM rating. When
comparing the Magic Lung®to blower units made by other manufacturers, use the “Equivalent CFM”.
6). Make-up Air
Air is drawn from the home in many ways, including fireplaces, bathfans, ceiling fans, kitchen ventilation
etc., creating the potential for the air pressure inside the house to become significantly less than that outside
the house (negative pressure). These two pressure levels will attempt to equalize, with air infiltrating into the
home via the easiest pathway possible. In todays tighter homes, the pressure may equalize by backdrafting
water heater flues, furnace flues and fireplace chimneys.
Backdrafting is a potentially dangerous situation that can be avoided by replacing air, removed from the
home, via a safe pathway from the outside (make-up air). If it is starved of air to exhaust due to inadequate
make-up air, a rh/l may perform poorly, evidenced by cooking contaminants not being completely exhausted to
the outside. Present your appliance and ventilation choice to a qualified HVAC professional who can determine
how much, if any, make-up air is needed.
For additional assistance, at this web site: www.shadyoakdist.com - click on “Vent-A-Hood” and under
“General Information” click on “Facts to gather prior to visiting your Vent-A-Hood dealer.”
Indoor air quality begins with an appliance properly vented by !
Distributed By: Shady Oak Distributing, 616 - 13th Ave. South, Hopkins, MN 55343
Ph: [phone] Toll Free: [phone] Fax: [phone] Rev. 9/08

“K-SERIES” INSTALLATION DO'S & DON'TS
(also see the separate specification procedures and installation instructions)
Range hoods and liners must be properly designed and installed in order for them to be
effective. No manufacturers exhaust system will work properly if it is poorly designed and/or
improperly installed. If a Vent-A-Hood does not seem to be working properly, there could be a
mechanical problem with the hood, but that is far-and-away the least likely cause. Vent-A-Hood,
properly specified and installed, works - period! The problem is virtually always a violation of one or
more of the 11 items detailed below.
Poor design and/or improper installation are the first places to look if the ventilator is not removing the
cooking pollutants.
1). Use properly sized, smooth galvanized ductwork, making the duct run as short and
straight as possible.
Blower Correct Duct Size Round Equivalent
240cfm 3-1/4” x 10” 7"
(32.5 sq. in.) (38.5 sq. in.)
2). DO NOT reduce the suggested minimum duct size, (as outlined above), ANYWHERE in
the duct run. Even at the wall cap or roof jack. A 5" duct in place of a 6" duct will reduce
a 300cfm air flow to 205cfm and a 7" duct in place of an 8" duct will reduce a 600cfm air
flow to 400cfm.
3). DO NOT USE flexible ductwork. The ribbing creates resistance to air flow and reduces
exhaust efficiency tremendously.
4). DO NOT TURN SHARP CORNERS. Make gradual turns in the duct run.
Rapidly moving air cannot make sharp 90°turns.
5). IF AT ALL POSSIBLE - do not space 90°elbows closer than 6 feet to each other.
6). TAPE ALL JOINTS with duct tape in order to prevent leakage of any pollutants into the wall, joist,
basement or attic spaces.
7). DO NOT USE SCREWS to attach ductwork to the duct collar on the top/back of the hood. Protruding
screws may keep the backdraft damper from opening and closing properly.
Make sure all backdraft dampers open and close completely and freely!
8). INSULATE THE DUCTWORK in cold spaces to prevent moisture condensation in the winter, which can
run down the ductwork into the cabinet below.
9). NO SCREENING MATERIAL on the wall caps or roof jacks. Screens cut air flow by 20-50% and should
not be used.
10). THE AIR SHOULD NOT "DEAD END" into the top of wall caps or roof jacks. Openings on wall caps or
roof jacks should be wide enough and deep enough to allow the air to flow continuously and freely. Wall
caps and roof jacks should have solid, gravity dampers that will open and close freely with the air flow.
Vent-A-Hood dealers have access to all the appropriate wall caps and roof jacks.
11). Due to tighter construction techniques being used in homes today, it is important to replace any air
removed from the home via a safe pathway from the outside. If this is not done, the possibility exists that
fireplaces, furnace flues etc. may be backdrafted. If it is starved of air to exhaust due to inadequate
make-up air, a range hood or liner may perform poorly, evidenced by cooking contaminants not being
completely exhausted to the outside.To avoid these potential problems, consult an HVAC professional
who is qualified to determine if, and how much, make-up air is needed.
Thank you for choosing !
Distributed By: Shady Oak Distributing, 616 - 13th Avenue South, Hopkins, MN 55343
Ph: [phone] Toll Free: [phone] Fax: [phone]

KHSLD LINER Halogen lights only. This model not available with heat lamps.This model only available
in Black, Biscuit, Gunsmoke Gray, Stainless Steel, or White.
WALL MOUNT LINER INSERT SPECIFICATIONS
Top Vent or Back Vent
3 ¼” x 10”
The VP521 transition is available
for top vent applications
at an additional charge.
Wall Cutout for Vertical Ducting
Viewed from Above
Back of
Liner
5 ⁄"
C
L
5 ⁄"
6 ¼"
Electrical
3 ½"
⁄"
2 ⁄"
Wall Cutout for Horizontal Ducting
Viewed from Front
To p of Liner
5"
5 1⁄8" 7"
C
L
*Exceeding recommended
mounting height may
compromise performance.
UL
CUS
R
36”
8’ Ceiling
21”-24”
6”
Custom
Enclosure
7”
7 ½”
3 ¼”
10”
Conection Diagrams (22 3/8", 28 3/8", 34 3/4", & 40 3/8" Widths) Recommended
Mounting Height*
KHSLD
Electrical/Mechanical Specications For Blower Units
Model Volts Amps Hz RPM CFM
[email protected]" Equivalent CFM•CFM [email protected]" CFM [email protected]" CFM [email protected]" Minimum Round Duct Size Sones#
K250 (Top Vent) 115 3.2 60 1550 250 375 223 220 190 7" (38 in.2) 7.4
K250 (Back Vent) 115 3.2 60 1550 220 330 215 195 180 7" (38 in.2) 7.4
All K-Series hoods have two halogen lights.
• BecausetheMagicLung®blowerusescentrifugalltrationratherthanconventionalbafeormeshlters,theMagicLung®blowercanhandlecookingequipmentwithhighercubicfeetperminute(CFM)requirementsandcandeliverequivalentCFMmuchmore
efcientlythanotherthanotherltrationsystems.WhencomparingtheMagicLung®withotherblowerunitsmadebyothermanufacturers,usethe“EquivalentCFM”.
# RatingsinaccordancewiththeStandardTestCodebytheEnergySystemsLaboratoryoftheTexasEngineeringExperimentStation.
SPECIFICATIONS SUBJECT TO CHANGE WITHOUT NOTICE Rev. 0709A
22 ⁄”, 28 ⁄”, 34 ⁄”, 40 ⁄”
6”
18”
16 ½”
5” LESS THAN
BOTTOM WIDTH
2 ½”