DuraVent Hepa Tower User manual

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Thank you for purchasing an
DuraVent® HEPA TOWER.
Your HEPA TOWER has been designed to quietly filter the
air in a room for many years to come.
Please take a few minutes to read over this manual and its
accompanying documents.
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HEPA TOWER Installation and Operation Manual, 03-15-2021
DuraVent ®, Inc., 2021. All Rights Reserved. Page 2
THEORY OF OPERATION
DuraVent’s HEPA Tower was designed to greatly minimize exposure to airborne pathogens, pollen and
dust by quietly filtering the air in the room. The design intent was to create a mobile HEPA filter unit that
would quietly filter any room, work space, office space, conference room or waiting room to minimize
the airborne transmission of viruses, viral particles, and removal of pollen, fungal spores and dust, that
can accumulate in indoor air. This portable unit recirculates and filters the air (HEPA=99.95%) in the
space it has been placed.
It works by pulling in contaminated air from low in the room, passing the air through a Merv 11 pre-filter
and Medical Grade HEPA Filter and pushing the air up high thus creating an airflow pattern (High to
Low) that reduces human exposure to contaminants.
The HEPA TOWER Design Requirements:
•Pre-filter: High quality MERV 11 pre-filter
• This HEPA Filter is rated at 99.95% efficiency [individual test certificate] which offers 99.95%
arrestance at 0.3 micron particle size. HEPA standard uses 0.3 microns as the "lowest point". This
means that the filtration efficiency increases for particle diameters both less than and greater than
0.3 microns.
• ECM Motor (High Efficiency) to quietly produce high volume airflow in ten speed steps (with optional
remote control) capable of medical grade room air changes per hour.
• Adjustable Louvered Air Exit, which allows you to direct the filtered air in 4 directions to create the
optimum airflow pattern through the room. Correct Air Flow will minimize Low Flow Areas in the room.
PURCHASE OPTIONS (not included)
A wireless remote is an available accessory option for DuraVent’s HEPA Tower. The wireless remote is
NOT included as part of this fan’s standard control package. The yellow manual included with these
accessories provides specific instructions for the installation and operation of the remote.
If purchased , the wireless remote receiver is connected to the fan electrical box at the blue RMT RJ45
port. Installation means removal of the rear panel, installation of the remote receiver and blue Cat5E
cable, a operational test and reinstalling the rear panel.
SAFETY INFORMATION
• The HEPA TOWER does NOT remove gasses.
• The HEPA TOWER is not for use in professional kitchens.
• Before servicing the Tower, unplug the fan from the wall receptacle to reduce the risk of damaging
circuit boards, fire, electrical shock, or injury.
• A used HEPA Filter should be treated as “infected” or contaminated and discarded taking
precautions. Avoid touching the filter material.
• Perform periodic checks of the air flow pattern, physically feel air moving in and out of the HEPA
Tower and around the room.
• When installing a new HEPA Filter avoid touching the filter material as this may damage (create a
hole in) the HEPA Filter and thus nullify the HEPA standard.

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THE HEPA TOWER
HEPA Tower
HEPA FILTER !
H13 (99.95%) Certified !
!
MERV 11 Pre-Filter !
2-3 month lifespan !
Micro-Droplets !
Viruses !
Airborne Organisms !
Fungal Spores !
Pollen, Dust !
Magnetic Inlet Grille !
Filter Frame
!
Screws in
Filter Frame to hold HEPA Filter, !
Press-
Fit Pre-Filter !
• Mobile!
• Clean air is supplied high in the room!
• Contaminated air returns to the Tower low!
• Creates a current of clean air to push contaminants !
down and away
– no short cycling!
• High efficiency ECM Motor
!
• Large Air Flow of 940 CFM
!
• Large HEPA Filter for long life!

HEPA TOWER Installation and Operation Manual, 03-15-2021
DuraVent ®, Inc., 2021. All Rights Reserved. Page 4
START-UP AND OPERATION
Before starting this Fan for the first time, verify that:
1. The HEPA Tower is standing on its wheels
2. The HEPA Tower’s power cord has been plugged into a ground tested, 120-volt outlet with
uninterrupted power.
3. The area in front of the towers inlet (grille) is as unobstructed as possible.
4. The Air Exit Louvers have been adjusted for proper Air Direction (see operational tips)
When running the HEPA Tower for the first time, make sure to observe it turning on, running at all of its
speed settings, and turning off, also verify Timer works at 1 Hour Setting.
As shown above, there are four “buttons” on your fan’s control interface:
When the Digital Touch Controller (DTC) is connected to power, a red LED will illuminate.
See the Power Indicator shown above.
The DuraVent Unit has ten speed settings. Turn on the fan by touching FAN UP or TIMER UP. The fan will
start at minimum speed. Green LED’s will illuminate to indicate the speed setting.
If the Fan was turned on by TIMER UP, the timer will be set to one hour and blue LED’s will illuminate to
indicate the timer setting. Press or hold FAN UP to increase the fan’s speed to maximum. Press or hold
TIMER UP to increase the length of time the Fan stays on in one hour increments until the desired time,
or the maximum time of 12 hours, is achieved.
If the fan is already operating at minimum speed, touch FAN DOWN/OFF to turn off the fan; any time
remaining on the timer will be canceled. If the fan is at maximum speed, press or hold FAN DOWN/OFF
to decrease the speed to minimum and once again to turn the fan off.
Press or hold TIMER DOWN/CANCEL to reduce the time on the timer by one hour increments until the
desired time is achieved or the timer is canceled. When the timer expires, the fan will turn off
automatically. If the timer is canceled, the fan will remain on at its current speed.
* Note: If untouched after a moment the selection LED’s will dim.
** Note: If the Fan is on without a timer, the fan will run indefinitely.

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OPERATING TIPS
• Make sure the Pre-Filter and inlet Grille are installed correctly. Change the Pre-Filter and HEPA Filter
when loading requires.!
• Use your HEPA Tower’s fan higher speed settings to clean your room quickly, then switch to its lower !
settings to run it quietly and efficiently through the day.!
• The Front of the Tower MUST remain unobstructed, with no objects closer than 24” to the face of the!
Inlet Grille.
• Airflow through the room is very important and some time should be taken to visualize airflow!
patterns to find the best spot for the Tower. Note: Since the Inlet Grille of the Tower is low to the!
ground it is wise to place the tower with it’s back against a wall leaving the Inlet Grille open to the
entire room and minimizing the airflow dead zone behind the unit.
• You can control where your tower’s airflow is directed by adjusting the louvers on the Air Exit!
Grille (on top of the Tower) and increasing the speed of the fan. Visualize the path air will travel from!
the Air Exit Grille to the far corners of the room, downward over the floor and back into the Tower Inlet!
Grille. (see Airflow in a room below)
• Objects in the room will “interfere” with (or redirect) the airflow. An open door or window can change !
the airflow pattern.
AIRFLOW IN A ROOM
This room simulation shows the HEPA Tower (back against the wall) placement and shows a possible
airflow pattern. These images can be used to comprehend the flow through a space.!
The HEPA Tower’s fan speed allows for audible and airflow adjustments. The higher the speed, the
higher the airflow through the Tower. The image below shows the changes in airflow pattern with a
higher velocity.
Note that the higher CFM airflow representation penetrates further into the room.

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Higher CFM airflow reaches further in
the room.
Dead zones or area’s of air stagnation occur:!
- in upper and lower corners of a room.
- behind the HEPA Tower, more so if not placed against a wall.
- when the airflow is too low for the room size.
- when there is furniture in the room obstructing the air path.!
Proper operation and placement of the HEPA Tower can be achieved by applying the basic information,
previously described. Physically “feeling” the reach of the airflow and direction should give the
operator a good idea about the airflow through the room. Use speed adjustment in conjunction with a
directing the exhaust louvers to create a proper airflow path that fills the room flowing from high to low.

HEPA TOWER Installation and Operation Manual, 03-15-2021
DuraVent ®, Inc., 2021. All Rights Reserved. Page 7
HEPA TOWER SPECIFICATIONS
Dimensions: 77 3/8” High x 27” Wide x 20 3/8” Deep
Weight: 172 lbs
Electrical: 120VAC, 60 Hz, Single Phase, 2.5A
Tested Airflow: 62 / 940 CFM (Low / High)
Tested Power: 10 / 272 Watts (Low / High)
Tested Noise*: 42 / 59 dBa (Low / High)
Controls: Low Voltage, Digital Touch Controller, Optional Wireless Remote.
Speed Settings: 10
Timer: 12 Hours, in increments of 1 Hour.
Warranty: 3 years mechanical & structural parts, 1 year control parts.
* Tested at 45° and 1 meter from source
MAINTENANCE
• Replace The Tower’s Pre-Filter every 2-3 Months.
Actual Size: 23 3/8” x 23 3/8” x 1 3/4” (or 3/4”) MERV11 Filter.
• Check HEPA Filter airflow and visually check Filter surface (do not touch) to determine when
needing replacement. Estimate 2-3 years depending on conditions.
Actual Size: 23 3/8” x 23 3/8” x 12” (H13) HEPA-Filter.
NOTE: Consider a used HEPA Filter “contaminated” and discard with care!
• Clean exterior paneling / wheels using mild soap and a clean cloth.
• Visually inspect the unit, wheels, paneling, air-inlet grille and air-exit louver for proper
functioning and fit.

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AIR-INLET FILTER SECTION
Hepa Filter Assembly 23.3” x 23.3” x 11.5”!
Hold Filter by edges. Do NOT touch the HEPA
Filter Material. Slide HEPA Filter into the Tower,
place the filter frame and secure it with the 4
screws!
Filter Frame Assembly!
Mounts by screwing it into the Tower
with a Philips head screwdriver.!
Tighten screws in a cross pattern.!
Inlet Grille magnetically mounts on the Tower
!
Pre
-Filter Assembly!
23.3/8” x 23.3/8” x 1 3/4”
!
(or
3/4”) Actual Size!
Press fit into the Filter Frame!
!

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ACCESS PANEL
HEPA Tower Rear Top (Access) Panel Removed
Controller!
Fan’s Electrical Box
!
Cord Wrap Box!
(removable)!

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TROUBLESHOOTING
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Your DuraVent HEPA Tower has been factory tested. If you encounter problems with the unit,!
please take a few minutes to run through the following troubleshooting procedures
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Possible causes: No power to unit or kinked Ethernet Cable
Suggestion 1: Is the Red LED on the DTC** on? Reset the DTC Power (see Start-Up & Operation).
Suggestion 2: Check the re-settable circuit breaker on fan’s electrical box.
Suggestion 3: Using another CAT5 Cable and connect it to the W/S port on the fanbox and the DTC.
Suggestion 4: Check power (115VAC) at the electrical outlet, inside the fan’s electrical box wiring at both the
power supply (115VAC) and the SCAB* (24VDC inside the fan’s electrical box).
** DTC = Digital Touch Controller
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Possible causes: Wiring issue between SCAB* and Fan
Suggestion 1: Open Fan’s electrical box and check for power (115VAC) at the fan’s power wires.
Suggestion 2: Check for pwm (control 0-24VDC, 80Hz PWM) signal at fan’s control wire connections on the SCAB*.
* SCAB = Simple Controller Attic Board / FAN BOX MOUNTED BOARD
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Possible causes: Battery, RF interference.
Suggestion 1: Check transmitter’s battery for power. Replace if necessary.
Suggestion 2: Check to see if LED on the remote receiver is lit. Open the cover and see if internal LED’s
respond by pressing a button on the remote.
Suggestion 3: Temporarily replace the CAT5 Ethernet cable.
Suggestion 4: Check for red LED response on DTC when pressing the remote buttons.
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ELECTRICAL SYSTEM SCHEMATIC SIMPLIFIED (HPT-MA-4-1)
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