HV Series
Whole House Cooling Fans
Product Manual
Coolers push hot air out of the attic while drawing cooler, fresh air into your home through open
windows and doors. When the system is
not operating, the motorized, insulated
doors automatically close and seal, preventing drafts and heat or air conditioning loss.
What’s the difference between the
different HV models? Physically all
Remember that a fan cools by
using the temperature
It can never get cooler
than the outside air.
HV products are the same size and look just
about the same. The HV 1000 series has
silver faced insulation and the HV 1600
Gold R has gold faced insulation.
Operationally, the HV 1000 moves 1000
cfm (cubic feet of air per minute) and the
HV 1600 Gold R is a two speed version
that moves 1600 cfm on high speed, just
under 1000 cfm on low speed.
Where should you locate your HV series fan? Air will always take the path of least
resistance. The HV should be located so that it is as central as possible to the area that you want
to cool. The cooler outside air should be able to move through the window, the space that needs
to be cooled, and exhausted out through the fan into the attic. The attic must have the equivalent
of 2 square feet of opening for the HV 1000
and 3.5 square feet for the HV 1600 Gold R
to the outside. This can be a combination of
ridge vents, gable, end vents or other attic
exhaust points. The fan can even be mounted
vertically, exhausting through a “knee wall”
into an under-the-eaves attic space.
What’s in the box? If you have unpacked
your HV carefully and found these instructions, you should have noticed the grille
wrapped in plastic including (6) white screws, the foam tape, the metal electrical box cover, a package
of (7) screws and these instructions. The HV1600 Gold R also has a remote control unit as does the
remote versions of the HV1000. If you have ordered a special control - timer, thermostat, or humidistat-that will also be in the box. DON’T PULL ON THE DOORS! You will strip the gears.
Tamarack Technologies, Inc.
What the HV Series of whole house cooling fans does: The HV Whole House
Do Not Pull On,
Carry By, or Stress the
Keep this area clear a minimum of 11.25 inches.
Before you start: Before you start installing the fan, you should be sure that there is enough
room for the doors to open and there aren’t any pipes, wires, or air conditioning or heating
ducts running through the space where the HV will be installed. Oh, and also - READ
Tools needed: A saw to cut the hole in the ceiling. A saw to cut two pieces of 2x stock
blocking. A hammer or screw gun to attach the blocking to the existing rafters. A screw driver
to attach the grille and for the electrical work. Sometimes owners find the installation looks
more finished if the inside of the blocking has been painted before the grille is put in place.
1. There are several methods for making the proper sized hole in the ceiling. The dimensions
of the hole should be no greater than 23 1/2" x 14".
• One way is to cut a pilot hole approximately in the center of where the fan will be
installed. Then cut toward the edge to find the rafter pattern. Then lay out the fan
opening on the ceiling. (Figure 1)
• Another way is to mark the four corners of the opening from the attic side. Draw a line
between each of the four corners to mark the fan rectangle.
• A third way is to use a Stud Finder to locate the rafters, cut a template from the fan
packaging material, and use the template to mark the opening on the ceiling.
2. With the hole cut out, add two pieces of framing to form a “box” between the rafters.
These will probably be cut from “2x” stock (2 x 6 or 2 x 8 or 2 x 10, etc.) of the same
dimension as the existing rafters. (Figure 2)
3. Install the foam gasket (supplied) on the top of the rafters and added framing. Check the
joint between the ceiling and the 2x stock. Some types of ceilings are spaced away from
the rafters. Any gap between the 2x’s and the ceiling should be sealed prior to final
installation. (Figure 3) (Note: foam sealant not supplied.)
4. Set the HV whole house fan onto the top of the gasket. The lower housing will fit into
the “box” with the mounting flanges overlapping the framing. NOTE: The HV should
not be forced into this opening. It should slip easily down onto the top of the rafters.
Forcing it into place may cause the doors not to function properly. (Figure 4)
5. If desired, secure the HV to the top of the rafters using the screws provided. (Note that
there is virtually no vibration and no way for the HV to move out of the opening so there
is little need to screw it into place unless your code requires it.)
6. Wire the unit as shown in the wiring diagram. We encourage the use of a licensed
7. Install the grille (screws included) on the ceiling below the fan. (Figure 5)
8. After wiring, check the HV for proper operation. Turn the unit on and wait 30 seconds
for the doors to fully open and the fans to start.
IMPORTANT - Because of the motorized damper doors, wiring the HV is different than a normal ON/OFF fan. Please follow the instructions carefully. Please use the correct wiring diagram for the HV product purchased.
If you are not familiar or comfortable working with wiring, refer the installation to a licensed electrician. Some State and Local
electrical codes require fan products be installed by a licensed electrician. Check with your local code officials before installation.
Please use the supplementary instructions for wiring
the HV 1600 Gold R. Call 1-800-222-5932 if these directions are missing.
HV 1000 The HV 1000 requires a constant source of power. Because the doors
are motorized, they need power to open
and power to close. (Fan operation is controlled internally.) There are three wires in
the electrical box: WHITE, BLACK, and
• The WHITE should be connected
Line Neutral, 115 VAC 60 Hz
• The RED should be connected to Line
Hot, 115 VAC 60Hz. (This is
constantly HOT.)
• The BLACK is the switched lead.
When 115 VAC Hot is applied to it,
the dampers will open. When 115
VAC Hot is removed from, the
dampers will close.
• Connect ground wire to screw in
electrical box
HV 1000
HV 1000
HV 1000R The HV 1000R requires a constant source of power.
Because the doors are motorized, they need power to open and power to
close. (Fan operation is controlled internally.) There are four wires in
the electrical box: WHITE, BLACK, and two YELLOWS that are
capped off.
• The WHITE should be connected Line Neutral, 115 VAC 60 Hz
• The BLACK should be connected to Line Hot, 115 VAC 60 Hz.
• Connect ground wire to screw in electrical box.
The two yellow leads may be used to connect to a wall mounted,
mechanical switch, timer, or thermostat. Call 800-222-5932 if you have
wiring questions.
The HV 1000R includes a wireless, wall mounted remote switch with a
“Decora” style cover plate. This switch will act like a permanently
mounted remote control and does not need to be wired and should be
mounted no more than 20 feet from the fan. This switch should only be
wall mounted. Please refer to the additional remote control instruction
sheet for switch installation and battery replacement instructions. These
batteries may need to be replaced on an annual basis.
HV 1000R
HV 1000R
Line Neutral (White)
Black (switched)
Line Hot (Black)
Line Neutral (White)
Line Hot (Black)
How to use the HV fan:
Use the HV to amplify the natural cooling process in the house. When the outside
temperature drops below the inside temperature, that cooler air can be used to cool the
Be sure to open at least
house. The HV should not be used to “cool” the house when it is hotter outside than it is
inside. The HV is a fan product and can never cool the house below the outside or source
one window when the
air temperature.
HV whole house fan is
Open the windows and/or doors as you would normally. Turn the HV on until the
temperature in the house drops to the desired level. Natural cooling is a slow process.
It may take a few hours or all night to thoroughly cool the house down.
The HV can be used any time you want to change the air in the house, but be careful not to steal the air from combustion
appliances that may back draft.
Maintenance: Very little maintenance is required. All the motors are permanently sealed and don’t require oiling. Keep the
dirt off the doors and the fans with occasional cleaning, and clear the dust off the intake grille.
The most common problem with the HV1000 is caused by mis-wiring so before you check anything else make sure:
WHITE wire in HV 1000 is connected to 115 VAC Line Neutral (white);
RED wire in HV 1000 is connected to 115 VAC Line Hot (Constant Hot Feed);
BLACK wire in HV 1000 is connected to a switch that will make it hot when the switch is closed.
Possible Cause
Don’t Open
Don’t Run
No power
Check connections or circuit breakers
(Audible “click”)
Don’t Open
Don’t Run
No constant power on RED
Check wiring connections.
There must be constant power
on the red wire.
Don’t Close
RED and BLACK are
connected together
Check wiring connections.
All three connections at the fan
must be made individually
Both Open
One fan runs
Something blocking
fan rotation
Turn off power and check
for extraneous material blocking
blade rotation
Both open
One opens
then closes then . . .
One fan runs
Door motor gears or limit
switch may have been
stressed during installation
Remove fan from between rafters.
Test operation of the HV 1000 sitting
on top of the rafters. If fan still
doesn’t work correctly, call for service.
Both close
One closes
then opens then . . .
Door motor gears or limit
switch may have been
stressed during installation
Remove fan from between rafters.
Test operation of the HV 1000
sitting on top of the rafters. If fan
still doesn’t work correctly,
call for service.
HV 1000R: If the wireless remote mounted wall switch fails to activate the fan, the switch’s batteries may need replacing. Remove the
face from the backing plate and locate the holders for the 3V button
cell batteries. Observing the polarity (plus side should face the
room), replace the batteries and the cover. Refer to additional sheet
for complete details.
If a secondary wall mounted, mechanical switch, timer or thermostat
has been connected, this mechanical control will override the remote
controls. If the mechanical control has turned on the fan, the remote
control switches will not turn it off until the mechanical control has
turned off.
Voltage ..................................................................115 VAC 60 Hz
HV 1000 Power ..............................................................112 Watts
HV 1000 Airflow @ .03” (System) ................................1000 CFM
Rough Opening ..................................................14 1/2" x 22 1/2"
Grille Dimensions ..............................................15 3/4" x 25 3/4"
R-Value through housing ..............................R-22 (Optional R-38)
Weight ............................................................................24 Pounds
Grille Color ..........................................White (“Return Air” Grille)
If you have a defective unit, call 800-222-5932 for a Return Merchandise Authorization (RMA) number.
Limited Warranty
If, within the period of three years from the date of purchase, the HV 1000 or HV
1600 Gold R(the Product) is defective or malfunctions in normal home use, Tamarack
Technologies, Inc. will repair or replace the Product at its discretion without charge for
labor or materials. Customer is responsible for shipping charges.
Conditions, Exclusions, and Limitations-This Warranty is subject to the following
conditions, exclusions and limitations:
This Warranty does not cover problems resulting from installation, operation or
maintenance that has been undertaken other than in accordance with the instructions.
This Warranty does not cover problems resulting from defects in or caused by
associated equipment (furnaces, solaria, etc.); from repairs or modifications attempted
by persons other than Tamarack Technologies, Inc.; from abuse, accidental or shipping
damage or acts of God.
This Warranty does not apply to the Product used outside the United States, its
territorial possessions, and Canada.
Except as set forth above, no express or implied Warranty is given or authorized by
Tamarack Technologies, Inc.
In no event shall Tamarack Technologies, Inc. be liable for any incidental damages
or for any consequential property or commercial damages, irrespective of the cause
thereof, occurring either during or after the warranty period, including without
limitation any damages to any part of a building or its contents.
Any Warranty or merchantability of fitness for any particular purpose shall be
limited to the Warranty thereunder.
Note: Some states do not allow the exclusion or limitation of incidental or
consequential damages and some states do not allow limitations on how long an
implied warranty lasts, so the above limitations or exclusions may not apply to you.
This Warranty gives you specific legal rights and you may also have other rights that
vary from state to state.
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