Vents TwinFresh Comfo RA-50 User manual

USER’S MANUAL
TwinFresh Comfo:
• RA-50
• RA1-50
• RA-50-2
• RA1-50-2
Single-room reversible energy
regeneration ventilator

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2
Safety requirements 3
Purpose 5
Delivery set 5
Designation key 6
Technical data 6
Unit design and operating logic 7
Mounting and set-up 9
Connection to power mains 12
Ventilator control 14
Technical maintenance 16
Fault handling 18
Storage and transportation regulations 18
Manufacturer's warranty 19
Acceptance certicate 20
Seller information 20
Installation certicate 20
Warranty card 21
CONTENTS

3
• Read the user’s manual carefully prior to installing and operating the unit.
• Full the user’s manual requirements as well as the provisions of all the applicable local and national construction, electrical and
technical norms and standards.
• The warnings contained in the user’s manual must be considered most seriously since they contain vital personal safety information.
• Failure to follow the rules and safety precautions noted in this user’s manual may result in an injury or unit damage.
• After a careful reading of the manual, keep it for the entire service life of the unit.
• While transferring the unit control the user’s manual must be turned over to the receiving operator.
Symbol legend:
WARNING!
DO NOT!
SAFETY REQUIREMENTS
This user’s manual consisting of the technical details, operating instructions and technical specication covers the installation and mounting
of the single-room energy regeneration reversible ventilator TwinFresh (hereinafter «the ventilator» or «the unit» as mentioned in the «Safety
Requirements» and «Manufacturer’s Warranty» sections as well as in warnings and information blocks).
UNIT MOUNTING AND OPERATION SAFETY PRECAUTIONS
• Disconnect the unit from power mains prior
to any installation operations. • The unit must be grounded!
• Do not lay the power cable of the unit in
close proximity to heating equipment.
• While installing the unit follow the
safety regulations specic to the use of
electric tools.
• Do not change the power cable length at
your own discretion.
• Do not bend the power cable. Avoid
damaging the power cable.
• Do not put any foreign objects on the power
cable.
• Unpack the unit with care.
• Do not use damaged equipment or cables
when connecting the unit to power mains.
• Do not operate the unit outside the
temperature range stated in the user's
manual. Do not operate the unit in
aggressive or explosive environments.
• Do not touch the unit controls with wet
hands.
• Do not carry out the installation and
maintenance operations with wet hands.
• Do not wash the unit with water.
Protect the electric parts of the unit
against ingress of water.

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UNIT MOUNTING AND OPERATION SAFETY PRECAUTIONS
• Do not allow children to operate the unit. • Disconnect the unit from power mains
prior to any technical maintenance.
• Do not store any explosive or highly ammable
substances in close proximity to the unit.
• When the unit generates unusual sounds,
odour or emits smoke disconnect it from
power supply and contact the Seller.
• Do not open the unit during operation.
• Do not direct the air ow produced by
the unit towards open ame or ignition
sources.
• Do not block the air duct when the unit is
switched on.
• In case of continuous operation of the
unit periodically check the security of
mounting.
• Do not sit on the unit and avoid placing foreign
objects on it.
• Use the unit only for its intended
purpose.

5
PURPOSE
DELIVERY SET
The ventilator is designed to ensure continuous mechanical air exchange in ats, cottages, hotels, cafes and other domestic and public
premises. The ventilator is equipped with a ceramic regenerator that enables supply of fresh ltered air heated by means of extract air heat
energy regeneration.
The ventilator is designed for through-the-wall mounting. The telescopic ventilator design enables its installation in the walls with various
thickness, see the table below:
Wall thickness Ventilator model
240 mm - 425 mm (9
7
/
16
’’- 16
3
/
4
”) • RA-50
• RA1-50
120 mm - 300 mm (4
3
/
4
’’- 11
13
/
16
’’) • RA-50-2
• RA1-50-2
The unit is rated for continuous operation.
Transported air must not contain any ammable or explosive mixtures, evaporation of chemicals, sticky substances, brous materials,
coarse dust, soot and oil particles or environments favourable for the formation of hazardous substances (toxic substances, dust, pathogenic
germs).
Name Number
Ventilator 1 item
Fastening set 1 item
Remote control 1 item
User's manual 1 item
Packing box 1 item
THE UNIT MAY NOT BE OPERATED BY CHILDREN OR PERSONS WITH REDUCED PHYSICAL,
MENTAL OR SENSORY CAPACITIES, OR LACKING THE APPROPRIATE TRAINING. THE UNIT
MUST BE INSTALLED AND CONNECTED ONLY BY PROPERLY QUALIFIED PERSONNEL AFTER
THE APPROPRIATE BRIEFING. THE CHOICE OF UNIT INSTALLATION LOCATION MUST PREVENT
UNAUTHORIZED ACCESS BY UNATTENDED CHILDREN.

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DESIGNATION KEY
TECHNICAL DATA
TwinFresh Comfo R1-50- 2
Ventilation hood type
_ — standard ventilation hood
2 — metal ventilation hood for thin walls
Comfo Series
Connecting air duct cross-section form
R - round cross-section
S - square cross-section
Integrated control system
Front panel type
_ — ventilation grille
1 - panel with a at front cover
Rated air capacity [m/h]
The ventilator is rated for indoor application with the ambient temperature ranging from -20°C (-4 °F) up to +50°C (+122 °F) and relative
humidity up to 80%.
Ingress Protection (IP) rating from solid objects and liquids IP 24.
The ventilator design is regularly improved, so some models may slightly dier from those ones described in this manual.
TwinFresh Comfo RA-50-2
TwinFresh Comfo RA1-50-2
TwinFresh Comfo RA-50
TwinFresh Comfo RA1-50
213
( 8 ⁄")
213
( 8 ⁄")
240
( 9 ⁄"")
240
( 9 ⁄"")
120-300
(4 ¾"-11 ⁄")
100
(4")
125
(5")
100
(4")
125
(5")
144
(5 ⁄")
ø 157
(ø 6 ⁄")
ø 153
(ø 6")
ø 157
(ø 6 ⁄")
ø 153
(ø 6")
300
(11 ⁄")
310
(12 ⁄")
260
(10 ¼")
300
(11 ⁄")
280
11"
240-425
(9 ⁄’’ - 16 ¾”)
133
(5 ¼")
VENTILATOR OVERALL DIMENSIONS MM INCHES

7
VENTILATOR TECHNICAL DATA
Speed I II III
Unit voltage [V /50-60 Hz] 1~100-230
Air capacity [m3/h] (CFM) 14 (8) 28 (16) 54 (32)
Power [W] 3,80 3,96 5,61
Current [A] 0,024 0,026 0,039
RPM 610 800 1450
Noise level, 1 m [dB(A)] (Sones) 22 (0,4) 29 (0,7) 32 (1,0)
Noise level, 3 m [dB(A)] (Sones) 13 (0,2) 20 (0,4) 23 (0,5)
Outdoor noise attenuation [dB(A)] (Sones) 18 (0,4)
Heat recovery eciency up to 90%
UNIT DESIGN AND OPERATING LOGIC
The ventilator consists of a telescopic air duct with adjustable length (inner part and outer part), a ventilation unit and an outer ventilation
hood. Two lters and a ceramic regenerator are located inside the inner duct of the telescope.
The air lters are designed to purify supply air and prevent foreign object ingress into the regenerator and the fan.
The ceramic regenerator utilises extract air heat energy to warm up supply air ow. The cord laid inside the regenerator is designed to pull
the regenerator from the ventilator. The regenerator is heat insulated with a specially designed insulating material.
The ventilation unit must be installed on inner side of the wall. The ventilation unit is equipped with automatic shutters that shut the air
duct o during the ventilator standby and prevent air back draft.
The ventilation hood must be installed on outer side of the wall. It is used for directed air discharge and prevention of ingress of water and
other objects to the ventilator.
VENTILATOR DESIGN
Ventilation unit
Generates air ow by means of the fan.
The ventilation unit is covered with a
ventilation grille on inner side of the wall
to prevent ingress of foreign objects into
the fan.
The ventilation unit is equipped with
automatic shutters to prevent back draft
of air. The air shutters open during
operation of the ventilator and close
when the unit is turned o.
Mounting plate
A mounting plate for
installation of the ventila-
tion unit on the wall and
connecting it to power
mains.
Air ow rectier
Eliminates air turbulence
inside the ventilator.
Outer air duct
Outer part of the
telescopic air duct.
Inner air duct
Inner part of the
telescopic air duct.
Outer ventilation hood
Prevents direct ingress of water and
foreign objects into the ventilator.
Filter
Cleans supply air ow
and prevents ingress of
dust and foreign objects
into the ventilator. Filters
also prevent regenerator
soiling.
Ceramic regenerator
The ceramic regenerator
utilises extract air heat
energy to warm up supply
air ow.

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AUTOMATIC SHUTTERS OPERATION
VENTILATOR OPERATION MODES
The ventilator has four ventilation modes:
• Natural Air Supply - the automatic shutters are opened, the fan does not run.
• Air Supply - the ventilator supplies fresh air to the premise.
• Ventilation - the ventilator operates in permanent supply or extract mode at set speed depending on CN7 jumper position.
• Regeneration - the ventilator operates in reversible mode with heat and humidity regeneration.
Ventilator is o (the shutters are closed) Ventilator is on (the shutters are opened)
A
I
R
E
X
T
R
A
C
T
I
O
N
A
I
R
S
U
P
P
L
Y
CYCLE I
CYCLE II
7
0
s
e
c
7
0
s
e
c
-10 °
(+14 °F)
-10 °
(+14 °F)
+20 °
(+68 °F)
+20 °
(+68 °F)
+17 °
(+63 °F)
-7 °
(+19.4 °F)
-7 °
(+19.4 °F)
+17 °
(+63 °F)
In Regeneration mode the ventilator operates in two cycles, 70 seconds each.
Cycle I. Warm stale air is extracted from the room. As it ows through the ceramic regenerator, it heats and moisturizes the regenerator,
transferring up to 91 % heat energy. In 70 seconds as the ceramic regenerator gets warmed the ventilator switches to Air Supply mode.
Cycle II. Fresh intake air from outside ows through the ceramic regenerator, absorbs accumulated moisture and is heated to the room
temperature. In 70 seconds as the ceramic regenerator gets cooled down, the ventilator switches to air extract mode and the cycle is
renewed.

9
MOUNTING AND SETUP
READ THE USER’S MANUAL PRIOR TO MOUNTING THE VENTILATOR.
WARNING!
THE VENTILATOR MUST NOT BE INSTALLED IN SITES WHERE THE
AIR DUCT MAY BE CLOGGED BY THE BLINDS, CURTAINS, DRAPES, ETC.
TO PREVENT THE ROOM DUST DEPOSITION AND ACCUMULATION.
BESIDES, CURTAINS CAN IMPEDE THE NORMAL CIRCULATION OF
AIR IN THE ROOM, MAKING THE OPERATION OF THE VENTILATOR
INEFFECTIVE.
VENTILATOR MOUNTING
1. Prepare a round through hole in the outer wall. The hole size is shown in the gure below. While preparing the holes consider the method
of laying the power cable.
Ø170
Ø6 ⁄"
min 500
min 19 ⁄"
min 500
min 19 ⁄"
min 500
min 19 ⁄"
AA-A
A
Ø170
Ø6 ⁄"
Inner side of the wall
Outer side of the wall
While preparing the hole provide a recess for the cable layout to enable connection of several ventilators in series.
2. Install the telescopic air duct inside the wall, centre the air duct using the mounting plate and seal it with mounting foam.
35
1 ⁄"
A
Inner side of
the wall
Outer side of
the wall
Seal the centred
air duct using the
mounting foam
Ventilator model А [mm] (inches)
TwinFresh Comfo RA-50 10 (3/8’’)
TwinFresh Comfo RA1-50 10 (3/8’’)
TwinFresh Comfo RA-50-2 10 (3/8’’)-110(4 5/16’’)
TwinFresh Comfo RA1-50-2 10 (3/8’’)-110(4 5/16’’)

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3. Install the mounting plate using the dowels (included in the delivery set).
Lean the mounting box
against the wall and mark
four holes for dowels
Lean the mounting box
against the wall and x it
with screws
Drill the holes and insert the
dowels
4. Consecutively install the lter, the ceramic regenerator, the second lter and the distance ring. Then attach the ventilation unit to the
mounting plate.
Filter
Distance ring
Ceramic regenerator Ventilation unit
Filter
OUTER HOOD MOUNTING
1. Mark the fastening holes for the outer ventilation hood and drill holes for the dowels. For convenience of marking use the back part of the
ventilation hood.
200 mm
(7 7/8")
Ø6 mm (1/4")
4 holes
220 mm
(8 11/16")
TwinFresh RA-50
TwinFresh RA1-50
194 mm
(7 ⁄")
Ø6 mm (¼")
4 holes
247 mm
(9 ¾")
TwinFresh RA-50-2
TwinFresh RA1-50-2
2. Insert the dowels from the delivery set into the holes.

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3. Disassemble the outer ventilation hood to enable access to the fastening holes.
Take o the front part of the outer ventilation hood.
1 2
Remove 5 screws and take o the front part of the ventilation hood.
4. Fix the back part of the ventilation hood on the wall with the screws from the delivery set.
5. Install the front part of the ventilation hood.

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CONNECTION TO POWER MAINS
DISCONNECT THE VENTILATOR FROM POWER MAINS PRIOR TO ANY ELECTRIC
INSTALLATION OPERATIONS.
CONNECTION OFTHE UNIT TO POWER MAINS IS ALLOWED BY A QUALIFIED ELECTRICIAN
WITH A WORK PERMIT FOR THE ELECTRIC UNITS UP TO 1000 V AFTER CAREFUL READING OF
THE PRESENT USER’S MANUAL.
THERATED ELECTRICALPARAMETERSOFTHEUNIT ARE GIVEN ONTHE MANUFACTURER’S
LABEL. ANY TAMPERING WITHTHE INTERNAL CONNECTIONS IS PROHIBITED AND WILLVOID
THE WARRANTY.
The ventilator is rated for connection to a single-phase AC
1~100-230 V / 50-60 Hz. For this purpose the power cable with a
plug is connected by the manufacturer.
Connect the ventilator to power mains through the external
automatic circuit breaker with a magnetic trip integrated into the
xed wiring system.
LN
In
LN
Out
LN
In
LN
Out
1~100-230 V / 50-60 Hz
Ground
terminals
L
N
G
D
+
+
N
L
N
G
D
+
+
N
Ventilator
controller
TB2
CN7
1
2
3
4
5
6
VENTILATION MODE SETTING
The jumper between the contacts 1 and 2 or 2 and 3 of CN7 socket connector determines air ow
direction in Ventilation mode. The circuit board of the controller is located inside the ventilation unit.
If the jumper connects the contacts 1 and 2, air is extracted from the room in the Ventilation mode
(factory setting).
If the jumper connects the contacts 2 and 3, air is supplied in the Ventilation mode.

13
CONNECTION OF SEVERAL VENTILATORS IN SERIES
When the ventilators are connected in series, all the connected ventilators are controlled with the rst ventilator and a remote control. To
connect the ventilators in series refer to the wiring diagram below. Connect the second ventilator with the third ventilator in the same way, etc.
Up to 10 ventilators may be connected in series.
For easy electric installations use a 3G AWG18 (3G 1,0) cable and a 2xAWG23 (20,25) cable (not included in the delivery set). The cable must
be rated for operation in an alternating current power supply with the country-specic mains voltage.
Disconnect the power cable while connecting the second, third, etc. ventilator in series.
CONNECTION OF SEVERAL VENTILATORS IN SERIES
BACKSIDE VIEW, THE TERMINAL BLOCK IS SHOWN SCHEMATICALLY
Input
L
G
-
D
N
Output
L
G
-
D
N
Ventilator no.2
Input
L
G
-
D
N
Output
L
G
-
D
N
Input
L
G
-
D
N
Output
L
G
-
D
N
Ventilator no.1
Control cable
2xAWG23
(2х0,25)
Control cable to the
next ventilator
Power cable
3G AWG18
(3G 1,0)
Power cable to the
next ventilator 1~100-230 V / 50-60 Hz
In case of connection of more than 10 ventilators, power is supplied to the 11th ventilator not from the previous ventilator but from power
mains (L and N terminals).
The control signals G and D from the 10th ventilator are transferred through the cable 2xAWG23 (20,25).
The ventilators no. 12…20 are connected to the ventilator no. 11 in the same way as the ventilators no. 1…10.
All the connected ventilators are controlled with the ventilator no. 1.
CONNECTION OF MORE THAN 10 VENTILATORS IN SERIES
ALL THE VENTILATORS CONNECTED IN SERIES
MUST BE GROUNDED!

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VENTILATOR CONTROL
The ventilator is operated with a remote control or the buttons on the ventilator casing, see the gure below.
The operation buttons on the ventilator casing have limited functionality: Only the second and the third speed can be activated. Three of
the four modes of ventilation may be set. The remote control has wider control capabilities.
Guaranteed range of the remote control is 1m. The receiver is located on the casing of the ventilator in the area of the control buttons , it is
necessary to take into account while using the remote control.
The ventilator stores the current operation mode and in case of power failure returns to this mode when power is restored.
Speed switch
Ventilation mode switch
Third speed
The ventilator operates with maximum air capacity.
Ventilation mode
The ventilator operates at the selected speed either in extract or supply mode
depending on the CN7 jumper position.
The fan is OFF
The ventilator does not operate. The shutters are closed.
Regeneration mode
In this mode the ventilator switches between supply and extract modes each 70
seconds with heat regeneration.
Second speed
The ventilator operates with 50% air capacity.
Supply mode
All the ventilators connected in series operate in supply mode irrespective of the CN7
jumper position.
1- operation of all the ventilators connected in series is determined by the CN7 jumper position.
Turning the ventilator on / o
Speed selection
Natural Air Supply
The shutters are open, the fan does not
run.
Night mode
The ventilator switches to the rst speed
in the darkness.
Air supply
The ventilator continually supplies fresh
air to the room irrespective of the CN7
jumper position.
Regeneration
The ventilator switches between supply
and extract modes each 70 seconds with
heat regeneration.
Ventilation
The ventilator operates at the selected
speed either in extract or supply mode
depending on the CN7 jumper position.
Humidity Set Point Setting
REMOTE CONTROL

15
REMOTE CONTROL
Set the speed switch to position and the ventilation mode switch to position to enable remote control of the ventilation unit.
1. Turning the ventilator on / o.
ON/OFF
2. Night mode.
ON/OFF
If the Night mode is activated, the ventilator switches to the rst speed in the darkness when the light is turned o. Activation of the Night
mode is conrmed by a long sound signal. Exiting the Night mode is conrmed by a short sound signal.
3. Speed selection.
First speed.
Second speed.
Third speed.
4. Operation mode.
Natural Air Supply mode. The room is ventilated in the natural way, the fan is o.
Air Supply mode. Air is supplied to the room at a set speed. All ventilators connected in series operate in air supply mode no
matter of CN7 jumper position.
Ventilation mode. Air is extracted (factory setting) or supplied at a selected speed. All the ventilators connected in series
operate depending on position of CN7 jumper.
Regeneration mode. The ventilator operates 70 seconds in supply mode and then 70 seconds in extract mode with heat
regeneration.
5. Humidity Control mode.
Humidity control is possible only in Regeneration mode by pressing one of the buttons that allow to select the humidity set point.
In the Humidity Control Mode the ventilator measures the humidity of the extract air. If the humidity exceeds the selected set point the
ventilator switches to a higher speed. After reaching the required level of humidity the ventilator switches to a lower speed.
Press one of the speed switches to deactivate the Humidity Control mode.
Setting humidity set point - 45%.
Setting humidity set point - 55%.
Setting humidity set point – 65%.
HUMIDITY CONTROL MAY BE ACTIVATED WITH THE REMOTE CONTROL ONLY!

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TECHNICAL MAINTENANCE
DISCONNECT THE VENTILATOR FROM POWER MAINS
PRIOR TO ANY MAINTENANCE OPERATIONS WITH
THE UNIT.
Maintenance of the ventilator means regular cleaning of the ventilator surfaces of dust and cleaning or replacement of the lters.
VENTILATOR MAINTENANCE
1. Fan inspection (once per year).
Take o the ventilation unit and clean the fan
blades. To remove dust use a soft brush, cloth
or a vacuum cleaner. Do not use water, abrasive
detergents, solvents, sharp objects. Clean the
impeller blades once a year.
Remove the ventilation unit Clean the impeller blades
2. Regenerator and lter maintenance (3-4 times per year).
1. Remove the air ow rectier.
2. Remove the lter upstream of the regenerator.
3. Pull the specially designed cord to remove the
regenerator from the air duct.
4. Be careful while removing the regenerator to
avoid its damage.
5. Remove the lter downstream of the
regenerator.
Filter
Distance ring
Ceramic regenerator
Filter
Clean the lters as they get soiled, but not less than
once in three months.
• After 90 days of operation the ventilator
generates a sound signal after which it is
necessary to switch o the ventilator and to
replace or clean the lters.
• Wash the lters and let them get dry. Install
dry lters in the air duct.
• Vacuum cleaning is allowed.
• The lter rated service life is 3 years.
• For new lters contact the Seller.

17
Some dust may accumulate on the regenerator
block even in case of regular maintenance of the
lters.
• Clean the regenerator regularly to ensure its
high heat recovery eciency.
• Vacuum clean the regenerator not less than
once a year.
To reset the hour meter install the lters and the regenerator into the ventilator and then press and hold the button for 10 sec.
until you hear a long sound signal.
3. Ventilation hood maintenance (once per year).
The ventilation hood may get clogged with leaves and other objects which may reduce the unit performance.
Check the ventilation hood twice per year and clean it as often as required.
To clean the ventilation hood disassemble it, then clean the ventilation hood and the air duct.
4. Replacement of the remote control battery (if necessary).
Replace the battery of the remote control after prolonged use. If
the ventilator does not respond to the commands from the remote
control it is a signal to replace the battery.
Battery type: CR2025.
To replace the battery of the remote control remove the battery
holder with a battery.
Replace the battery and install the holder with a new battery back
to the remote control.
+
CR2025
3V
+
CR2025
3V

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FAULT HANDLING
STORAGE AND TRANSPORTATION REGULATIONS
POSSIBLE FAULTS AND TROUBLESHOOTING
Fault Possible reasons Fault handling
When switching on the
ventilator the fan does not
start.
No power supply.
Make sure the power supply line is connected
correctly, otherwise troubleshoot the connection
error.
The motor is jammed, the impeller blades are soiled.
Turn the ventilator o. Troubleshoot the motor jam
and the impeller clogging. Clean the blades. Restart
the ventilator.
Circuit breaker tripping
during the ventilator start-
up.
Overcurrent as a result of short circuit in the electric
line.
Turn the ventilator o.
Contact the Seller.
Low air ow.
Low set fan speed. Set a higher speed.
The lter, the fan or the regenerator is soiled.
Clean or replace the lter, clean the fan and the
regenerator.
Refer to Technical maintenance, clause 1,2.
The ventilator generates
sound signals.
The hour meter is activated to inform of the need to
replace the lters. Refer to Technical maintenance, clause 2.
Noise, vibration.
The impeller is soiled. Clean the impeller.
The ventilator casing or ventilation hood screw
connections are too loose.
Tighten the screws of the ventilator or the outer
ventilation hood.
Store the unit in the manufacturer’s original packing box in a dry closed ventilated premise with temperature range from +5 °C to + 40°C.
Storage environment must not contain aggressive vapours and chemical mixtures provoking corrosion, insulation and sealing deformation.
Use suitable hoist machinery for handling and storage operations to prevent possible damage to the unit.
Follow the handling requirements applicable for the particular type of cargo.
The unit can be carried in the original packing by any mode of transport provided proper protection against precipitation and mechanical
damage.
Avoid sharp blows, scratches or roughhandling during loading and unloading.

19
MANUFACTURER’S WARRANTY
FOLLOWING THE REGULATIONS STIPULATED HEREIN WILL ENSURE A LONG AND
TROUBLE-FREE OPERATION OF THE UNIT.
USERS’WARRANTY CLAIMS SHALL BE SUBJECT TO REVIEW ONLY UPON
PRESENTATION OF THE UNIT, THE PAYMENT DOCUMENT AND THE USER’S MANUAL
WITH THE PURCHASE DATE STAMP.
Production meets standard operating requirements in the USA and Canada.
VENTS US warrants to the original purchaser of the TwinFresh Comfo RA-50 / RA1-50 / RA-50-2 / RA1-50-2 unit that it will be free from
defects in materials or workmanship for a period of 60 months from the date of original purchase.
The VENTS US warrants to the original purchaser of the TwinFresh Comfo RA-50 / RA1-50 / RA-50-2 / RA1-50-2 unit that the integrated
control unit will be free from defects in materials and workmanship for a period of 24 months from the date of original purchase.
During the stated warranty period, VENTS US will, at its option, repair or replace, without charge, any product or part which is found to
be defective under normal use and service. This warranty does not cover (a) normal maintenance and normal service or (b) any products or
parts which have been subject to misuse, negligence, accident, improper maintenance or repair (other than by VENTS US), faulty installation or
installation contrary to recommended installation instructions. Labor to remove and replace products is not covered.
The duration of any implied warranty is limited to the time period specied for the express warranty. Some states do not allow limitations
on how long an implied warranty lasts, so the above limitation may not apply to you.
VENTS US OBLIGATION TO REPAIR OR REPLACE, AT VENTS US OPTION, SHALL BE THE PURCHASER’S SOLE AND EXCLUSIVE
REMEDY UNDER THIS WARRANTY. VENTS US SHALL NOT BE LIABLE FOR INCIDENTAL, CONSEQUENTIAL OR SPECIAL DAMAGES
ARISING OUT OF OR IN CONNECTION WITH PRODUCT USE OR PERFORMANCE.
THERE ARE NO OTHER WARRANTIES, EXPRESS OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, IMPLIED WARRANTIES OF
MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.
Some states do not allow the exclusion or limitations of incidental or consequential damages, so the above limitation or exclusion
may not apply to you. This warranty gives you specic legal rights, and you may also have other rights which vary from state to state. This
warranty supersedes all prior warranties.
If proof of sales date is absent, warranty period is calculated from the production date.
The unit can be exchanged at the following address:
Bodor Vents, LLC DBA: Vents-US
11013 Kenwood Road Cincinnati, Ohio 45242
Phone: [phone]
e-mail: [email protected]

www.ventilation-system.com
20
Seller
Address
Phone Number
E-mail
Purchase Date
Seller’s Stamp
Unit Type Single-room reversible energy regeneration ventilator
Model TwinFresh Comfo _________________
Serial Number
Manufacture Date
Production meets standard operating requirements in the USA and Canada.
Quality Inspector’s
Stamp
This is to certify acceptance of the complete ventilator delivery with the user’s manual. The warranty
terms are acknowledged and accepted.
Customer’s Signature
The single-room reversible energy regeneration ventilator TwinFresh Comfo _________ has been
connected to power mains pursuant to the requirements stated in the present user’s manual.
Company Name
Address
Phone Number
Installation
Technician's Full Name
Installation Date: Signature: Installation Company Stamp
The ventilator has been installed in accordance with the provisions of all the applicable local and
national construction, electrical and technical codes and standards. The ventilator operates normally
as intended by the manufacturer.
Signature:
ACCEPTANCE CERTIFICATE
SELLER INFORMATION
INSTALLATION CERTIFICATE