Air+Health Cascade Series User manual

Please retain these instructions after installation.
This device MUST be installed by a qualied agency in accordance with the manufacturer's installation instructions. The denition of
a qualied agency is: any individual, rm, corporation or company which either in person or through a representative is engaged
in, and is responsible for, the installation and operation of HVAC appliances, who is experienced in such work, familiar with all the
precautions required, and has complied with all the requirements of the authority having jurisdiction.
Installation Date:
Installed By: Phone:
P/N 780105002 01/21 Rev A
Cascade®Series
WHOLE HOUSE FAN SYSTEMS
CA6.5 MODEL
INSTALLATION MANUAL
ITEMS INCLUDED:
• (2) Fan Assembly with steel support straps, hardware and 20 foot power cord
• (2) Duct Support Straps & hardware
• (2) Acoustic Flex Duct, 7 foot length with collars
• Gravity Damper Assembly
• “Eggcrate” style Inlet Grille (white) with mounting screws
• Wall Mount Controls with (2) 2-Speed On/O Switches, White Decora duplex wall
plate, and Plastic Double Gang Wall Box

page 2 of 16P/N 780105002 01/21 Rev A
(THIS PAGE LEFT INTENTIONALLY BLANK)

page 3 of 16
SAFETY CONSIDERATIONS
•
•
Never
Never
operate this fan without a window or door opened.
operate this fan without a window or door opened.
•
•
This fan is meant for general ventilation.
This fan is meant for general ventilation.
It has NOT been designed to ventilate particle laden and/or
It has NOT been designed to ventilate particle laden and/or
explosive mixtures of air and must NOT be used for such.
explosive mixtures of air and must NOT be used for such.
•
•
This fan is NOT for use in kitchens
This fan is NOT for use in kitchens
•
•
Before installing or servicing this fan, switch power o at the home’s electrical panel to reduce the risk
Before installing or servicing this fan, switch power o at the home’s electrical panel to reduce the risk
of damaging circuit boards, re, electrical shock, or injury.
of damaging circuit boards, re, electrical shock, or injury.
•
•
Install this fan in accordance with this manual and all local codes and standards.
Install this fan in accordance with this manual and all local codes and standards.
Some of the principles of safe installation and operation of this product are not immediately obvious.
Some of the principles of safe installation and operation of this product are not immediately obvious.
Read the following safety information before continuing further:
Read the following safety information before continuing further:
Thank you for purchasing a Cascade
®ducted Whole House Fan. This fan has been designed to provide many years
of natural, quiet, and energy-ecient cooling.
Please take a few minutes to read over this manual and its accompanying documents to make sure you are
prepared to install the Whole House Fan system. In particular:
•
•
The homeowner/resident should read the WHERE TO LOCATE section so that the fan will be correctly lo-
The homeowner/resident should read the WHERE TO LOCATE section so that the fan will be correctly lo-
cated to maximize its eectiveness and eciency.
cated to maximize its eectiveness and eciency.
•
•
The VENTILATION REQUIREMENTS section is also particularly important, as it describes the minimum attic
The VENTILATION REQUIREMENTS section is also particularly important, as it describes the minimum attic
ventilation neccessary to operate the fan.
ventilation neccessary to operate the fan.
•
•
The INSTALLATION: GRAVITY DAMPER section contains important information regarding the constraints
The INSTALLATION: GRAVITY DAMPER section contains important information regarding the constraints
within which this fan’s gravity damper must be installed.
within which this fan’s gravity damper must be installed.
The Eggcrate Inlet Grille and Gravity Damper Assemblies come in dierent size openings. Verify which
The Eggcrate Inlet Grille and Gravity Damper Assemblies come in dierent size openings. Verify which
gravity
gravity
damper component design is part of your Whole House Fan Assembly by actual measurement of the gravity
damper component design is part of your Whole House Fan Assembly by actual measurement of the gravity
damper opening section before beginning installation of gravity damper section.
damper opening section before beginning installation of gravity damper section.
Before installing this fan, inspect it and all of its parts for any damage it may have sustained during shipping.
Before installing this fan, inspect it and all of its parts for any damage it may have sustained during shipping.
DO NOT
DO NOT
INSTALL DAMAGED EQUIPMENT.
INSTALL DAMAGED EQUIPMENT.
If you suspect this fan has been damaged during shipping, contact your reseller.
If you suspect this fan has been damaged during shipping, contact your reseller.
Whole House Fans are designed to be installed within a home’s attic, which makes them and their sub-
Whole House Fans are designed to be installed within a home’s attic, which makes them and their sub-
components dicult to access once installed.
components dicult to access once installed.
TEST THIS FAN OUTSIDE OF THE ATTIC BEFORE INSTALLING IT
TEST THIS FAN OUTSIDE OF THE ATTIC BEFORE INSTALLING IT
PERMANENTLY.
PERMANENTLY.
P/N 780105002 01/21 Rev A

page 4 of 16
GRAVITY DAMPER INFORMATION
ELECTRICAL REQUIREMENTS
The
Cascade
Series Whole-House Fan Systems require a 115 volt electrical power supply of minimum 15A am-
pacity and maximum 15 Amp circuit overcurrent protection. We strongly recommend providing a dedicated
circuit for this fan system.
All electrical components, whether included with the
Cascade
system or supplied by others, must be rated
for the fan system’s electrical load requirements; please refer to the
Cascade
Series specications table for the
electrical load requirements of the specic model to be installed.
All wiring and connections must be made according to this manual and all applicable electrical
wiring codes and standards. All applicable electrical codes must be followed to the satisfaction of the local
authority having jurisdiction.
Cascade Series Whole-House Fan Systems are shipped with a pre-wired 20 foot 115V power cord that may be
used to operate the fan by means of a switched or remote-controlled 115V grounded outlet mounted in the
attic. A wall switch rate for the fan system’s electrical load requirements may be mounted in the living space
and used for simple single-speed control of the fan. The power cord is pre-wired to operate the fan on high
speed only but may be re-wired for low speed operation if desired; please refer to the appropriate wiring dia-
grams for further information. If a remote-controlled outlet is used for fan control, the remote outlet must be
rated for the electrical load requirements of the specic model to be installed.
Cascade Series Whole-House Fan Systems include wall mount electrical control components including 2 multi-
speed switches, a white Decora duplex wall plate, and a plastic double gang wall box. These controls may be
installed to provide multi-speed control of the fan from within the living space. Please refer to the appropriate
wiring diagrams for further information on the proper wiring conguration.
The
The
Cascade
Cascade
Series Whole House Fan Systems have dierent gravity damper sizes, depending on the
Series Whole House Fan Systems have dierent gravity damper sizes, depending on the
specic model to be installed. Verify which gravity damper size is provided with your system prior to
specic model to be installed. Verify which gravity damper size is provided with your system prior to
beginning installation of the product.
beginning installation of the product.
The Cascade Series fan systems include gravity-closed gravity damper doors that are opened by air
pressure created by fan operation. The dampers serve to block entry of air from the attic into the living space, and
are provided with foam sealing and insulating material in the doors to reduce heat transfer from the attic space.
P/N 780105002 01/21 Rev A

page 5 of 16
VENTILATION REQUIREMENTS
It is very important that the attic be suciently ventilated for the fan system to operate properly. Without adequate
ventilation, hot air exhausted from the home cannot easily escape from the attic, which creates back-pressure that
will substantially reduce the fan’s performance. Operating this fan in an attic with less net free ventilation area
than recommended will decrease its airow and energy eciency.
If subject to the California Title 24 requirements for whole-house fan ventilation, the fan system must be installed to
the minimum ventilation requirements as found in the standard.
In the absence of applicable local code regarding whole-house ventilation, we recommend a minimum of 1 square
foot of “net free” ventilation area per 500 cfm at a fan’s highest speed for proper operation.
Refer to specication
Refer to specication
table for required Net Free Ventilation Area in Attic at HVI fan rating.
table for required Net Free Ventilation Area in Attic at HVI fan rating.
Net
Net
Free Ventilation Area
Free Ventilation Area can be provided by any combination of gable, eyebrow, roof cap, sot, or ridge
vents, or any other method of ventilating the attic space. The openings of most vents are partially obstructed by
grilles, louvers, and/or screens. A vent’s“net free”ventilation area is the surface area of its opening minus the surface
area of any grilles, louvers, or screening covering it. Dierent types of vents have dierent ratios of net free area to
total area.
While most properly constructed homes have adequately ventilated attics, not all do. Because sucient ventilation
is a very strong factor in this fan’s performance, it is important that the home’s existing ventilation be veried before
it is installed.
Manufacturers typically publish their vents’ net free ventilation areas and/or ratios in their products’
specication documents. If this information is unavailable, a ratio of 50% net free area to total area is usually a good
rule of thumb. A notable exception to this rule of thumb are ridge vents. The industry standard net free ventilation
area for ridge vents is 13% of the vent’s length in feet.
Since most attics have multiple vents, often of dierent types, it is necessary to count each vent, noting its type
and size. Apply the appropriate ratio to the dimensions of each vent to nd its net free area, and sum these
values to nd the attic’s total ventilation. An example of how these calculations are made is given in the table below:
Vent Type Dimensions Total Area
Net Free Area Ratio
(“NFA”)
Net Free Ventilation Area
(=Total Area x NFA)
Two Louvers 24” x 24” 24” x 24” / 144 = 4 ft.250% 2 x 4 ft.2x .50 = 4 ft.2
Ridge 40 feet n/a 13% 40 feet x .13 = 5.32 ft.2
Round Sot 10” diameter 3.14 x 5” x 5” / 144 = .55 ft.250% .55 ft.2 x .50 = 0.28 ft.2
Total Net Free Ventilation Area: 9.60 ft.2
Please consult a roong professional if the attic’s net free ventilation area remains uncertain. Additional ventilation may be
required for proper operation of the fan system.
P/N 780105002 01/21 Rev A
Refer to specication table for required minimum Open Window Ventilation Area in square feet when operating
Refer to specication table for required minimum Open Window Ventilation Area in square feet when operating
whole house fan. Without adequate Open Window Ventilation Area, the quantity of cooler air, pulled into the home
whole house fan. Without adequate Open Window Ventilation Area, the quantity of cooler air, pulled into the home
to be exhausted to the attic, may substantially reduce the fans overall performance.
to be exhausted to the attic, may substantially reduce the fans overall performance.

page 6 of 16
• Locate this fan in a central location, away from windows that will be opened during
its operation. Installing this fan centrally promotes an even replacement of air through-
out the home, and the longer the path of air travels from an open window to the fan,
the greater the cooling eect.
• The damper provided with this fan can only be installed in a horizontal orientation,
thereby requiring the unit to be installed in the ceiling.
• Locate this fan at the highest point possible. This exploits natural convection and helps
the fan exhaust the hottest indoor air from the home.
• Typically, the ideal location for this fan in a two-story home is in the open area at the
top of the stairs.
• Avoid locating this fan in a narrow space or over hard ooring as sound reecting o
of hard surfaces can amplify its perceived noise.
• Even though the Cascade series fan systems are engineered to be extremely quiet, we
specically recommend against installing it in a bedroom as humans’perception of noise
is far greater when the surrounding environment is quiet (such as within a bedroom at
night).
By running this fan through the night, homeowners can extract the maximum possible amount of heat from their
home’s structure and contents. This essentially “pre-cools” the home ahead of the rise in temperature the next day,
which can reduce or even eliminate the need for air conditioning. This Cascade Whole House Fan has been designed
specically for quiet and ecient operation. As such, we strongly recommend homeowners run this fan through the
night to reduce their energy expense.
With these principles of operation in mind, adhere to the following guidelines when choosing a location for this fan:
WHERE TO LOCATE THIS FAN
The best location for this fan is determined by an understanding
of its theory of operation: As a home heats up during the
day, a large amount of heat is retained in its structure and
contents. These materials give up their heat slowly and, in
doing so, continue to heat the home’s interior even though
the outdoor temperature may, in fact, be very comfortable
in the evening and at night. Thus, homeowners are forced to
either endure the hot conditions inside of their homes or turn
on their air conditioners and bear the expense thereof.
When operated properly, this whole house fan can resolve
this dilemma by forcing the hot air inside a home out and
drawing cool air from outside in. The illustration to the right
depicts how this fan exhausts hot air into the attic and draws
cool air into the house from outdoors through open windows
and/or doors.
P/N 780105002 01/21 Rev A

page 7 of 16
The ideal orientation of unit’s gravity damper is in a level position. If necessary, however, the damper can be in-
stalled at a slight angle. TIP: before beginning the installation, make sure that the fan assembly is undamaged,
and that the fan blade rotates freely. Brace or clamp the fan assembly to a secure object, and temporarily plug
in the fan’s power cord into a grounded power outlet to verify smooth and correct operation.
Be aware that the fan is quite powerful and will draw in loose objects or de
Be aware that the fan is quite powerful and will draw in loose objects or de
bris, and will blow dirt,
bris, and will blow dirt,
debris and other objects with force!
debris and other objects with force!
Use eye protection when operating the fan to avoid injury from blowing sand or debris! Keep hands
Use eye protection when operating the fan to avoid injury from blowing sand or debris! Keep hands
and other objects away from the rotating fan blade!
and other objects away from the rotating fan blade!
TIP: Before beginning the installation, verify that the damper assembly is undamaged, and that the damper
doors operate freely, opening and closing fully without binding or restriction.
INSTALLATION: GRAVITY DAMPER
GRAVITY DAMPER ORIENTATION NOTE
1. From consideration of the principles of whole-house
fan operation, determine the best general area for
installation of the gravity damper assembly. The
damper assembly is to be mounted in the attic with
its bottom edge opening into and ush with the
ceiling of the living space. The eggcrate inlet grille
is to be mounted on the ceiling of the living space,
covering and engaging with the opening of the
damper assembly.
2. Using the cardboard from the fan system’s packaging,
or other suitable material, make a rectangular tem-
plate for the rough opening of the damper assembly
to these dimensions making sure all sides are at right
angles to each other):
a. Cascade CA 6.5 model: 14-1/4” wide, 36-1/4” long FIGURE 1 - TEMPLATE
3. Take the template into the attic, above the general area for installation, and determine the exact desired
location for the rough opening for installation of the damper assembly. There must be at least 36” of
vertical clearance above the damper assembly location, and the damper assembly must be fastened to
secure framing (ceiling joist, roof truss, or additional framing) along at least one long side or both short
sides of the damper assembly! Add additional framing as required to support the weight of the damper
assembly and duct.
a. For existing construction, the anges surrounding the opening of the damper assembly may
be removed for clearance (as with 16” on-center framing) and/or to allow the side or sides of
the damper assembly to make direct contact with the framing used to support the damper
assembly. Leave anges in place if they will not be fastened to framing, if possible. Additional framing
may be added after the damper assembly is placed into the rough opening, so the anges can
remain in place if space allows.
b. For new construction, before the ceiling drywall is hung, frame in a rough opening for
installation of the damper assembly from below. Leave the assembly anges in place and
simply attach the damper assembly to the bottom of the framing using appropriate
fasteners installed through the anges. Skip all following steps regarding cutting the rough
opening into the ceiling and proceed with installation of the duct and fan assembly.
P/N 780105002 01/21 Rev A

page 8 of 16
7. Using a drywall saw or other appropriate device, carefully cut out the rough opening into the ceiling. Use
care to avoid damaging the surrounding areas of the ceiling that will not be covered by the edges of the
eggcrate inlet grille.
8. Place the fan assemblies, exible ducts, and damper assembly in the attic space. If necessary, the fan and
damper assemblies may be passed through the rough opening into the attic. It may be necessary to
detach the exible duct from the fan assembly to allow passage of the fan and duct into the attic space. It is
recommended to pre-attach the ex ductwork to fan assembly prior to placing unit in attic.
9. Move the damper assembly into place in the rough opening, with the bottom edge of the assembly
protruding into the opening. If more than two anges were removed from the damper assembly for
installation clearance, make sure that the bottom edge of the damper assembly does not protrude below
the surface of the ceiling.
10. Attach the damper assembly to the framing by installing drywall screws (as supplied) or wood screws
through the inside wall(s) of the damper assembly into the framing. If addition framing is to be added,
place the framing over the damper assembly anges and fasten in place.
If using fasteners long enough to penetrate through the framing, use extreme caution
If using fasteners long enough to penetrate through the framing, use extreme caution
to avoid drilling
to avoid drilling
into hidden wiring, plumbing, or other building elements of concern!
into hidden wiring, plumbing, or other building elements of concern!
11. From below, install drywall screws through the ceiling and through the anges of the damper assembly,
and into any addition framing positioned above the anges. Use care to avoid installing screws outside
of the area that will be covered by the eggcrate inlet grille!
12. Hold the eggcrate grille in position on the ceiling, and install the included white screws through the holes
in the ange of the grille, through the ceiling, and into the damper assembly anges and/or framing
above.
Make sure that the eggcrate grille mounting screws penetrate into either the damper box anges or
Make sure that the eggcrate grille mounting screws penetrate into either the damper box anges or
framing above, and that the grille is securely fastened in place!
framing above, and that the grille is securely fastened in place!
FIGURE 2 - DAMPER BOX INSTALLATION
4. Make sure that the exact location chosen for
the rough opening will allow installation of the
eggcrate inlet grille, and will not interfere with
any lighting xtures, smoke alarms, or other
objects installed in the ceiling.
5. Remove any insulation from the area of
the exact chosen location, and make sure that
no wiring, plumbing, bracing or other building
elements will interfere with the damper
assembly installation.
6. With the template laying on top of the
ceiling in the exact chosen location, mark the
outline of the template onto the ceiling. If the
ceiling hole is to be cut from below, drill or
punch a small hole at each corner of the
template, and mark the outline of the template
from below the ceiling.
P/N 780105002 01/21 Rev A

page 9 of 16
INSTALLATION: FAN & DUCT
NOTES:
• The fan assembly must be soundly supported by attachment to structurally sound framing. Provide
additional framing with minimum 2-by-4 lumber as needed for fan support.
• Each fan assembly should be positioned with at least 24” of free space in front of the fan, for air to be freely
blown into the attic by the fan.
• Position the fan with a slight upward angle and in a direction minimizing disturbance to attic insulation.
• The acoustical duct should be installed with a gentle bend of close to 90 degrees, from vertical to nearly
horizontal, to minimize fan sound inside the living space. It must not be kinked or bent sharply, especially
where leading into the fan.
• The acoustical duct must be installed with the air ow direction arrow (as marked on the duct) pointing
downstream (towards the fan).
1. Lay the fan assembly on top of the ceiling joists,
within a few feet of the damper assembly and
and underneath the area where the fan will be
suspended in place.
2. Rotate and brace the fan assembly so that the
electrical handy-box on the fan is in the 12-o’clock
position (on the top of the fan). This is important to
avoid twisting the duct, while having the fan’s
electrical handy-box within the 10- to 2-o’clock
position once installed.
3. Adjust the exible duct collar on the upstream end
of the duct to be as loose as possible. Squeeze
and position the exible acoustic duct collar over
the oval-shaped collar on the damper box, and attach
using 3 of the screws provided, or other suitable
screws. Note that twisting the duct will cause the
fan to try to roll out of position. Seal the joint with
approved duct tape, mastic, or other approved means.
4. Lift and support the fan assembly into position beneath the rafters, truss structure or other framing to be
used to support the fan, with the electrical handy box at approximately the twelve-o-clock position.
Attach both ends of the metal fan support strap to the framing using a minimum of two screws for each
end of the strap. 1” drywall screws and large washers are supplied; other fasteners of appropriate
strength may also be used.
5. Using the black woven poly strapping, support the acoustic ex duct by attaching the strapping to
attic framing as shown. Fold each end over a large washer 2-3 times and fasten to the framing by driving
the supplied 1” drywall screws or other appropriate fasteners through the washer and into the framing.
The strapping may be cut to length with ordinary scissors if desired.
6. Repeat steps 1-5 for the second fan assembly. The fans should be facing opposite directions.
7. Replace the insulation around and over the damper assembly. Additional insulation may be added to
further reduce heat transfer and fan noised from the attic to the living space.
FIGURE 3: FAN & DUCT STRAPS DETAIL
P/N 780105002 01/21 Rev A

page 10 of 16
INSTALLATION: WIRING & CONTROLS
P/N 780105002 01/21 Rev A
The Cascade PSC Series Whole-House Fan Systems require a 115 volt electrical power supply of minimum 15A
The Cascade PSC Series Whole-House Fan Systems require a 115 volt electrical power supply of minimum 15A
ampacity and maximum 15 Amp circuit overcurrent protection.
ampacity and maximum 15 Amp circuit overcurrent protection.
All electrical components, whether included with the Cascade system or supplied by others, must be rated
All electrical components, whether included with the Cascade system or supplied by others, must be rated
for the fan system’s electrical load requirements; please refer to the Cascade Series specications table for the
for the fan system’s electrical load requirements; please refer to the Cascade Series specications table for the
electrical load requirements of the specic model to be installed.
electrical load requirements of the specic model to be installed.
All wiring and connections must be made according to this manual and all applicable electrical wir-
All wiring and connections must be made according to this manual and all applicable electrical wir-
ing codes and standards. All applicable electrical codes must be followed to the satisfaction of the local
ing codes and standards. All applicable electrical codes must be followed to the satisfaction of the local
authority having jurisdiction.
authority having jurisdiction.
A dedicated circuit is strongly recommended for this fan system.
A dedicated circuit is strongly recommended for this fan system.
1. In the living space, install the double gang plastic outlet box (provided) in the desired location.
2. Run a 15-amp 115 VAC power circuit to the plastic outlet box installed in the living space using
romex 14-2 with ground wire (minimum). Refer to minimum ampacity and maximum overload
protection requirements listed for this power run. Note: a dedicated circuit is recommended.
Note: Romex wire is dened as“wire Gauge - # of conductors”(ie: 14-2, 14-3). Always use Romex wire with
Ground or equivalent wire to meet branch circuit ampacity.
3. For CA6.5 models WHF installation using power cord supplied with fan (reference Diagram: 1), pull
14-2 romex wire (minimum wire size) from the double gang box to separate single-gang outlet
box installed in the attic less than 10 feet away from the fan assembly. The single-gang outlet box will
require a NEMA5-15R receptacle and cover plate. The romex wire, single-gang outlet box, NEMA5-
15R receptacle and cover plate are not supplied with product. Wall switch will allow fan to operate in
single speed operation. Repeat for second fan.
For CA6.5 models WHF installation hardwired (reference Diagram: 2), pull 14-3 romex wire (minimum
wire size) from the double gang plastic box directly to the fan assembly electrical box and remove the
fan power cord. Wall switch will allow fan to operate in two speed operation. Repeat for second fan.
4. Make the wiring connections to the included switches as shown in Diagrams 1 and 2 for the fan
model, control kit provided and desired method of wiring (power cord or hardwired).
5. Install the switches into the outlet box, and install the included wall plate.
6. In the attic, make the wiring connections as shown in the appropriate wiring diagram in the fan
assembly handy-box or boxes.
7. Verify that grounding continuity is maintained properly to the fan assembly housing or housings.
8. Re-install the handy-box cover or covers.

page 11 of 16
DIAGRAM 1: For CA6.5 Models Hardwired to Fan Assembly
DIAGRAM 2: For CA6.5 Models with Dual 2-Speed Wall Controls
P/N 780202604 RevA
P/N 780202603 RevA
P/N 780105002 01/21 Rev A

page 12 of 16
FIGURE 10 : STANDARD 2 SPEED SWITCH
OPERATION
Before starting this fan for the rst time, verify that:
Before starting this fan for the rst time, verify that:
• All wiring and connection have been made according to this manual and all applicable wiring codes and
• All wiring and connection have been made according to this manual and all applicable wiring codes and
standards.
standards.
• No tools or construction debris have been left in, on or around the fan.
• No tools or construction debris have been left in, on or around the fan.
• Dedicated 115VAC, 15 AMP power outlet has been properly installed and plug terminal outlet orientation is
• Dedicated 115VAC, 15 AMP power outlet has been properly installed and plug terminal outlet orientation is
correct.
correct.
• Wall control is installed properly.
• Wall control is installed properly.
• Open windows to allow for outside air to enter space.
• Open windows to allow for outside air to enter space.
• Verify that Functional Check in INSTALLATION:
• Verify that Functional Check in INSTALLATION:
WIRING & CONTROLS
WIRING & CONTROLS
section has been completed prior to home
section has been completed prior to home
owner use.
owner use.
• Verify grille is installed below damper assembly.
• Verify grille is installed below damper assembly.
•
•
Switch the hi/o/low fan speed switches to o. Turn on power at breaker panel to whole house fan.
Switch the hi/o/low fan speed switches to o. Turn on power at breaker panel to whole house fan.
•
•
Switch the fan speed switches to the desired fan speed. Each switch controls one of the 2 fan assemblies,
Switch the fan speed switches to the desired fan speed. Each switch controls one of the 2 fan assemblies,
use them in conjunction to reach the desired speed setting.
use them in conjunction to reach the desired speed setting.
•
•
The fan will turn o if both speed switches are switched to o.
The fan will turn o if both speed switches are switched to o.
P/N 780105002 01/21 Rev A
IMPORTANT OPERATING TIPS
The following important tips for operating this fan have also been provided.
•
NEVER
NEVER operate this fan without also opening a window or door. Doing so can excessively depressurize
the home.
• Only operate this fan when the outdoor air temperature is cooler than the indoor temperature.
• Make sure the home’s air conditioner and furnace are OFF before turning on this fan. Running either of
these together with this whole house fan wastes money because the fan will force expensively
conditioned or heated air out of the home.
• We recommend running this fan through the night. The goal of using a whole house fan is to cool the
entire home, not just the air inside it. Once heated, the home’s structure and contents continue to
radiate heat until reaching the temperature of the surrounding air. Running this fan through the night
speeds up this cooling process and can then further “pre-cool” the home, reducing or eliminating the
need to use air conditioning the next day.
• If the home has a basement, extra cooling can be achieved by drawing in air through the basement windows.
• This fan’s cooling eect can be increased or concentrated in particular areas by adjusting the location of open
windows. Visualize the path air will travel from the windows to your fan’s opening. Generally, the longer the
path, the more cooling.

page 13 of 16
P/N 780105002 01/21 Rev A
MAINTENANCE & TROUBLESHOOTING
Make sure the appropriate circuit breakers at the home’s electrical panel are turned OFF before servicing this fan.
There is no routine maintenance required for this fan other than making sure the fan assembly and gravity damper
are kept clean of any possible buildup of debris.
Blocking this fan’s exhaust can cause it to fail prematurely. Keep the area in front of the fan as unobstructed as
possible: no object should be closer than 24” to the face of the fan.
This fan has been factory tested. If problems are encountered, please take a few moments to run through the
following troubleshooting procedures before calling for assistance:
• If the fan does not turn on, check power to the unit and the wiring at both ends of the switch and the
fan-mounted junction box.
• If the damper aps do not open or close, visually inspect the damper for any debris obstructing their
movement.
If the suggestions above do not work, contact your retailer for further assistance.

page 14 of 16 P/N 780105002 01/21 Rev A
Speed Settings: 3 (OFF/LOW/HIGH) - 2 Speed Motors
Gravity Damper Rough Opening Dimensions: 14.25 inches W x 36.25 inches L
Grille Construction: Aluminum Cube Core, Steel frame with White Powder Coat
Fan Diameter: 2 - 18.75 inch sections
Duct Length: 2 - 7 ft sections
Duct Diameter: 2 x 16 inches
Electrical: 115VAC, 60 Hz
Fan Motor: (HP/FLA) 2 X 1/3 HP / 4.9 (each fan assembly)
Damper Door Insulation: R5 (compiled)
Installation: Installs easily on 24” or 16” O.C. framing
Attic Net Free Ventilation Area (Sq ft) ** 9.26
Open Window Ventilation Area (Sq ft)** 18.52
SPECIFICATIONS*
*Due to our continual product improvement eorts, performance ratings and specications are subject to change without notice.
**Attic Net Free Ventilation and Open Window Ventilation Areas are listed as minimum requirements.
Actual lower ventilation areas may reduce fans overall performance at high speeds.
PART # MODEL DESCRIPTION
602604201 AH-WTT Digital Wall Timer/Temp. Ctl. w/RJ12 Cable includes FC3JF Fan Relay
602604202 AH-RTT Remote Timer/Temp. Control includes AH-WTT Control Package
602604203 AH-WFM WiFi Module includes AH-WTT Digital Wall Control Package
602604204 AH-iM3 WiFi Switch Assembly includes App, and FC3JF for Wireless install
602604205 AH-6.5CT CA/EV 6.5 Control Trim - Must order w/ control upgrade for 6.5 models
CONTROL UPGRADE OPTIONS

page 15 of 16 P/N 780105002 01/21 Rev A
FIGURE 6: CASCADE CA6.5 REPLACEMENT PARTS
P/N 780800600 RevA

P/N 780105002 01/21 Rev A
Twelve (12) Year Limited Warranty
Provisions:
1.Contact Retailer for which original purchase has been made with warranty claim
2.Valid proof of purchase
3.Provide model number, serial number, and date code
4.Labor charges are not covered as part of the limited warranty
a. IN NO EVENT SHALL COMPANY BE LIABLE FOR ANY INDIRECT, SPECIAL, INCIDENTAL,
CONSEQUENTIAL, OR SIMILAR DAMAGES (INCLUDING, BUT NOT LIMITED TO, LOST PROFITS
OR REVENUE, INABILITY TO USE PRODUCT, OR OTHER ASSOCIATED EQUIPMENT, THE
COST OF SUBSTITUTE EQUIPMENT, AND CLAIMS BY THIRD PARTIES) RESULTING FROM
THE USE OF PRODUCT. Some states do not allow the exclusion or limitation of incidental
or consequential damages, so the above limitation or exclusion may not apply to you.
b. THIS WARRANTY AND REMEDIES ARE EXCLUSIVE AND IN LIEU OF ALL OTHER WARRANTIES,
REMEDIES AND CONDITIONS, WHETHER ORAL, WRITTEN, EXPRESS, STATUTORY, OR IMPLIED.
TO THE EXTENT PERMITTED BY LAW, COMPANY DISCLAIMS ALL IMPLIED AND STATUTORY
WARRANTIES, INCLUDING WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
PURPOSE.
c. Product that has been subjected to misuse, accident, shipping or other physical
damage, improper installation or application, abnormal operation or handling, neglect,
re, water, or other liquid intrusion are not covered by the warranty.
Whole House Fans
Whole House Fans
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