Airtecnics RUND User manual

Please, read these instructions carefully before attempting installation
Deliver this manual to the nal user.
SECURITY ADVISE SYMBOLS
¡Attention, Danger, Safety Advice! Danger from electric current or high voltage!
Injuries risk! Danger! Do not stay underneath: Heavy load.
Important information.
INSTALLATION, OPERATION AND MAINTENANCE MANUAL
Air curtain: RUND

Instructions manual - Air curtain Rund
2

Instructions manual - Air curtain Rund 3
INDEX
INSTALLATION ��������������������������������������������������������������������������������������������������������������������������������4
TRANSPORTATION AND STORAGE �������������������������������������������������������������������������������������������� 11
WORKING INSTRUCTIONS���������������������������������������������������������������������������������������������������������� 11
ELECTRICAL SQUEMES �������������������������������������������������������������������������������������������������������������� 15
DATA SHEET����������������������������������������������������������������������������������������������������������������������������������19
INSTRUCCIONES DE MANTENIMIENTO�������������������������������������������������������������������������������������21
REPAIRS AND REPLACEMENTS �������������������������������������������������������������������������������������������������25
FAULTS AND SOLUTIONS ������������������������������������������������������������������������������������������������������������30
DECLARATION OF CONFORMITY �����������������������������������������������������������������������������������������������32
IDENTIFICATOR ����������������������������������������������������������������������������������������������������������������������������34
GUARANTEE ���������������������������������������������������������������������������������������������������������������������������������34

Instructions manual - Air curtain Rund
4
INSTALLATION
CENTERED/ HEIGHT
DOOR DISTANCE
(*) Unless it has been de-
signed to be installed at that
height.
*
Tips and recomendations for a good installation
LENGTH

Instructions manual - Air curtain Rund 5
AIR DISCHARGE AIR ASPIRATION
CONTROL (CLEVER)
MAINTENANCE ACCESSIBILITY

Instructions manual - Air curtain Rund
6
Rund model
H MAX� Maximum recommended range, MIN� Recommended minimum distance
(*) Standard equipment� Upon request, this distance can be reduced to 10 mm when the connections are
located inside the unit and the tube outlet is at the rear� In this case, dimension B will be 10 mm�
The minimum recommended distance between the suction grille and any obstacle is 200 mm (Dimension A)
Dimension D: service opening distance�
Installation work, connection, disconnection, electrical wiring, mechanical
maintenance and service must be done by qualied people observing these
instructions and in accordance with all applicable norms and standards.
If the unit is operated with additional controller, please consider its specic
instructions.
There is no need to open the service panel to connect the air curtain. All
connections (power supply, control, water pipes when existing) and xations
are external. They are placed on top or lateral of the units. See how to open
service panel at repairs section.
For safety, the air curtains never have to be stopped by disconnecting them
from the main supply, always through the controller and waiting 10 minutes at
least to disconnect the main supply. In case to not follow these instructions, the
internal parts of the air curtain can be damaged.

Instructions manual - Air curtain Rund 7
Connexion diagram
Standard without heating, with water and electric heating 400V x 3

Instructions manual - Air curtain Rund
8
Rund EC model 0 - 10V external regulation 230 50/60 Hz

Instructions manual - Air curtain Rund 9
Fixings
To connect the device to power, there is a black junction box inside the air curtain�
For curtains without heating or with water heating, the curtain must only be connected to a 230V single-phase
current for the operation of the fans�
In the case of a curtain with an electric battery, connect the 400Vx3 three-phase power supply from the
electric battery� Optionally, the battery power can be 230Vx3 three-phase or 230Vx1 single-phase (special
diagram included)�
Thesingle-phase currentisonly connectedto onephase ofthethree-phase lines,plus aconnection totheneutral�
Recommended maximum number of curtains connected to the same di󰀨erential:
Each installation must be reviewed by a specialist to ensure that there is no incompatibility with the selected
di󰀨erential and the connected curtains.
The curtain has several external fastening points
depending on the weight and length (see situa-
tion in the model characteristics section)�
Generally, air curtains are installed horizontally�
For vertical installation, use the feet kit (see ac-
cessories section)�
The anchor must be sized according to the
weights of each curtain indicated on the techni-
cal data page� The installation can be done using
threaded rods, tensioners or other supports (see
available supports in the accessories section)�
Board and regulator
To connect the controller to the curtain, there is a connector located on the inside of the air curtain� It is ne-
cessary to open the curtain to connect it, except for internal connections�
Use the 7 meter RJ45 cable supplied with the equipment� The communication between the controller and the
board is digital and low voltage�
Power supply
Model Di󰀨erencial 30mA Di󰀨erencial 300mA
M-G 20 uts� 20 uts�
ECG 2 uts� 20 uts�

Instructions manual - Air curtain Rund
10
Water coils
The air curtains with water coil have a 230Vx1 output to optionally connect a solenoid valve (it opens or clo-
ses the water inlet to the heat exchanger of the coil)� This outlet can also be used for other low amperage
electrical appliances (10A)�
Recomendations:
• Close the hot water circulation (valve) to avoid overheating of the motors while the equipment is o󰀨. Op-
tionally, we have solenoid valves�
• In the installation of the building, two shut-o󰀨 valves (outlet and return) should be provided to be able to
disassemble the equipment without problems�
• Mount a purge valve at the highest point of the heating section�
The ambient temperature must always be higher than +4º C� Otherwise, the equipment must be provided
with a frost protection device (antifreeze sensor)�
The water coils have a drain screw in the collector area�
Electric coils
The electric battery has nine resistances in the form of a bar that, combined with each other, provide 3 stages
of heating� Control is carried out by 3 PRBEOs up to 27kW included� From there, the control is carried out
by two contactors�
All the batteries are electrically and electronically protected against overheating (see section “operating ins-
tructions”)�
Electric controllers have the option of including an external thermostat to control heating on and o󰀨 based on
temperature�
During the rst uses, the electric battery can give o󰀨 some odor that disappears in a few days.
According to battery power, the regulation is carried out by:
Coil power (kW) Regulation type
9 / 12 / 15 / 18 / 22,5 / 24 PRBEO
30 CONTACTORS

Instructions manual - Air curtain Rund 11
Store in a dry place protected from the environment� If the package is opened, cover the curtain
to protect it from the dust� Do not step on or place heavy loads on it to avoid damage to the material�
Storage temperature between -20 ⁰C and +40 ⁰C.
When transporting the material, you must ensure that it is not damaged by the forklift�
(possible penetration of the fork in the packaging)� Observe the instructions on the packaging for correct
manipulation of the product�
Warning! Heavy load.
Do not stand under the suspended load during transportation or assembly.
For safety, the air curtains must never be stopped by disconnecting the
current, always do it through the controller. If the power is turned o to
turn o the shade, or within ten minutes of turning it o with the controller,
internal components may be damaged.
TRANSPORTATION AND STORAGE
WORKING INSTRUCTIONS
There are various regulator models depending on the customer’s needs: timers, antifreeze detectors,
thermostats, etc�
- 5 fan speeds�
- Memory: guarantees that, in the event of a power outage, the selected speed is maintained when
service is restored� This function can be activated/deactivated using the ON/OFF switch located inside the
regulator�
Common characteristics to all regulators
Characteristics of regulation boards
Depending on the type of fan, the air speed is regulated by:
- AC (MG): 110 - 230 V voltage range�
- EC (ECM - ECG): from 0 - 10V DC voltage range�
- Remote control: all standard dimmers have an IR receiver that allows them to use a remote control�
- External start-stop: inside the regulator there is the possibility of connecting a normally open contact (1,2)
that governs the on/o󰀨 of the equipment through any external device. The contact is potential free. When the
contact is closed, the curtain has a 30-second delay before stopping� It can be used for a timer, temperature
sensor,  re alarm, PLC, etc.
- RJ45 cable and digital communication: they have a fast connection with a telephone type cable and
digital communication between the regulator and the curtain� This type of communication is reliable even
over long distances (up to 20 meters)�

Instructions manual - Air curtain Rund
12
There are various regulator models depending on the customer’s needs: timers, antifreeze detectors,
thermostats, etc�
- 5 fan speeds�
- Memory: guarantees that, in the event of a power outage, the selected speed is maintained when
service is restored� This function can be activated/deactivated using the ON/OFF switch located inside the
regulator�
Common characteristics to all regulators
Characteristics of regulation boards
Depending on the type of fan, the air speed is regulated by:
- AC (MG): 110 - 230 V voltage range�
- EC (ECM - ECG): from 0 - 10V DC voltage range�
- Remote control: all standard dimmers have an IR receiver that allows them to use a remote control�
- External start-stop: inside the regulator there is the possibility of connecting a normally open contact (1,2)
that governs the on/o󰀨 of the equipment through any external device. The contact is potential free. When the
contact is closed, the curtain has a 30-second delay before stopping� It can be used for a timer, temperature
sensor,  re alarm, PLC, etc.
- RJ45 cable and digital communication: they have a fast connection with a telephone type cable and
digital communication between the regulator and the curtain� This type of communication is reliable even
over long distances (up to 20 meters)�
System with 5 fan speeds and 3 heating stages (C1, C2, C3 = [C1+C2])�
Common characteristics of the regulators for curtains with water battery
• Heating ON/OFF: With the “HEAT” ON/OFF button, the 230Vx1 power supply to the solenoid valve is
manually activated or deactivated so that it opens or closes the passage of water to the coil� This 230x1
output is located in the upper part of the unit, next to the regulator’s RJ45 cable connection�
• External thermostat (regulator solenoid valve): If you want to control the water inlet to the coil by
means of a thermostat, the thermostat must be installed in series with the solenoid valve� In this way,
when the set temperature is reached, the solenoid valve closes the passage of water�
• Segurity thermostat: If the interior temperature reaches 60 ºC and the maximum speed of the curtain
is not selected, the ventilation speed automatically increases by 1 speed every 2 minutes to evacuate
the excess of thermal energy inside� It will continue at full speed until the inside temperature drops below
50°C�
Safety operation is indicated by a  ashing LED. If security is activated on a regular basis, you need to  nd
out the cause� It is most likely that the frequency of cleaning the suction grille will have to be increased� For
example, an obstruction in the suction grille, the motor stopped, a high room temperature in an installation
without a room thermostat, etc�, would cause the curtain to speed up automatically� It also prevents the air
expelled by the curtain from exceeding 60ºC (excessive thermal sensation for people)�
Common characteristics to all regulators for electric batteries
3 heating powers: C1=1/3 Total, C2=2/3 Total, C3=C1+C2=Total�
Limited heating: for reasons of equipment safety, the heating power is limited by the ventilation speed that
we have selected, as follows:
Regulator for curtains with water battery
Selected speed Heating máx power
V1 1st stage heating
V2 2nd stage heating
V3 2nd stage heating
V4 3rd heating stage (1st stage + 2nd stage)
V5 3rd heating stage (1st stage + 2nd stage)

Instructions manual - Air curtain Rund 13
There are various regulator models depending on the customer’s needs: timers, antifreeze detectors,
thermostats, etc�
- 5 fan speeds�
- Memory: guarantees that, in the event of a power outage, the selected speed is maintained when
service is restored� This function can be activated/deactivated using the ON/OFF switch located inside the
regulator�
Common characteristics to all regulators
Characteristics of regulation boards
Depending on the type of fan, the air speed is regulated by:
- AC (MG): 110 - 230 V voltage range�
- EC (ECM - ECG): from 0 - 10V DC voltage range�
- Remote control: all standard dimmers have an IR receiver that allows them to use a remote control�
- External start-stop: inside the regulator there is the possibility of connecting a normally open contact (1,2)
that governs the on/o󰀨 of the equipment through any external device. The contact is potential free. When the
contact is closed, the curtain has a 30-second delay before stopping� It can be used for a timer, temperature
sensor,  re alarm, PLC, etc.
- RJ45 cable and digital communication: they have a fast connection with a telephone type cable and
digital communication between the regulator and the curtain� This type of communication is reliable even
over long distances (up to 20 meters)�
System with 5 fan speeds and 3 heating stages (C1, C2, C3 = [C1+C2])�
Common characteristics of the regulators for curtains with water battery
• Heating ON/OFF: With the “HEAT” ON/OFF button, the 230Vx1 power supply to the solenoid valve is
manually activated or deactivated so that it opens or closes the passage of water to the coil� This 230x1
output is located in the upper part of the unit, next to the regulator’s RJ45 cable connection�
• External thermostat (regulator solenoid valve): If you want to control the water inlet to the coil by
means of a thermostat, the thermostat must be installed in series with the solenoid valve� In this way,
when the set temperature is reached, the solenoid valve closes the passage of water�
• Segurity thermostat: If the interior temperature reaches 60 ºC and the maximum speed of the curtain
is not selected, the ventilation speed automatically increases by 1 speed every 2 minutes to evacuate
the excess of thermal energy inside� It will continue at full speed until the inside temperature drops below
50°C�
Safety operation is indicated by a  ashing LED. If security is activated on a regular basis, you need to  nd
out the cause� It is most likely that the frequency of cleaning the suction grille will have to be increased� For
example, an obstruction in the suction grille, the motor stopped, a high room temperature in an installation
without a room thermostat, etc�, would cause the curtain to speed up automatically� It also prevents the air
expelled by the curtain from exceeding 60ºC (excessive thermal sensation for people)�
Common characteristics to all regulators for electric batteries
3 heating powers: C1=1/3 Total, C2=2/3 Total, C3=C1+C2=Total�
Limited heating: for reasons of equipment safety, the heating power is limited by the ventilation speed that
we have selected, as follows:
Regulator for curtains with water battery
Selected speed Heating máx power
V1 1st stage heating
V2 2nd stage heating
V3 2nd stage heating
V4 3rd heating stage (1st stage + 2nd stage)
V5 3rd heating stage (1st stage + 2nd stage)
Delay thermostat:
When the equipment is stopped with the heating on, there is an increase in temperature
inside it that could damage it due to the thermal inertia of the electrical resistors� To avoid this, the curtain
continues to work up to 90 seconds after stopping; and if when stopping the curtain, the temperature rises
above 50 ºC, the equipment goes to maximum speed and does not stop until the excess thermal energy is
evacuated�
Segurity thermostat
when the curtain works with heating and the internal temperature rises above 60 ºC,
the safety function is activated: it increases 1 air speed every two minutes until reaching the maximum speed�
Then, it starts down 1 stage of heating until it stops� If it persists, after two minutes, it blocks the heating�
To unlock it you have to remove the current from the curtain� If at any time the internal temperature does
not reach the limit of 60 ºC and a downward trend begins, this process is interrupted and returns to normal�
A delay in cleaning the suction grille or a high ambient temperature could temporarily activate this function�
Ambient thermostat:
the curtain is equipped with the necessary contacts to be able to install, if desired, a
room thermostat that stops the heating when the set temperature is reached� It is recommended when the
equipment is installed in a closed area of reduced dimensions� If you install the room thermostat, remove the
jumper between terminals 4 and 5 of the controller and connect the thermostat there�
The air speed and heating stage are indicated by a continuously lit LED, while the safety speed is indicated
by a  ashing LED. The heating lockout is indicated by its OFF LED  ashing at a faster rate.
Special regulators
If there is a need to be able to control more parameters (intelligent proactive regulation, automatic/manual
operation, door delay, time programmer, energy saving mode, multi-device management and BMS Modbus
connection, among others) ), there are two controllers that allow much more possibilities than the standard
controller, especially the Clever� The following regulators have their own manual:
• Hand Auto
• Clever control
Remote Control Features
Turn the air curtain on and o󰀨 .
Infrared system�
Increase or decrease the
speed of the fans
It works with batteries
of type AAA / LR03�
In air curtains with electrical heating,
it modi es the power of the heating.
On air curtains with water heating, it
opens and closes the solenoid valve�

Instructions manual - Air curtain Rund
14
Delay thermostat: When the equipment is stopped with the heating on, there is an increase in temperature
inside it that could damage it due to the thermal inertia of the electrical resistors� To avoid this, the curtain
continues to work up to 90 seconds after stopping; and if when stopping the curtain, the temperature rises
above 50 ºC, the equipment goes to maximum speed and does not stop until the excess thermal energy is
evacuated�
Segurity thermostat when the curtain works with heating and the internal temperature rises above 60 ºC,
the safety function is activated: it increases 1 air speed every two minutes until reaching the maximum speed�
Then, it starts down 1 stage of heating until it stops� If it persists, after two minutes, it blocks the heating�
To unlock it you have to remove the current from the curtain� If at any time the internal temperature does
not reach the limit of 60 ºC and a downward trend begins, this process is interrupted and returns to normal�
A delay in cleaning the suction grille or a high ambient temperature could temporarily activate this function�
Ambient thermostat: the curtain is equipped with the necessary contacts to be able to install, if desired, a
room thermostat that stops the heating when the set temperature is reached� It is recommended when the
equipment is installed in a closed area of reduced dimensions� If you install the room thermostat, remove the
jumper between terminals 4 and 5 of the controller and connect the thermostat there�
The air speed and heating stage are indicated by a continuously lit LED, while the safety speed is indicated
by a  ashing LED. The heating lockout is indicated by its OFF LED  ashing at a faster rate.
Special regulators
If there is a need to be able to control more parameters (intelligent proactive regulation, automatic/manual
operation, door delay, time programmer, energy saving mode, multi-device management and BMS Modbus
connection, among others) ), there are two controllers that allow much more possibilities than the standard
controller, especially the Clever� The following regulators have their own manual:
• Hand Auto
• Clever control
Remote Control Features
Turn the air curtain on and o󰀨 .
Infrared system�
Increase or decrease the
speed of the fans
It works with batteries
of type AAA / LR03�
In air curtains with electrical heating,
it modi es the power of the heating.
On air curtains with water heating, it
opens and closes the solenoid valve�

Instructions manual - Air curtain Rund 15
ELECTRICAL SQUEMES
Curtain with water coil or only air with standard regulator (AIRDOE09051)
In case there is a need to connect the curtain to a PLC, the corresponding diagram is attached�

Instructions manual - Air curtain Rund
16
Curtain with water battery or without heating with Hand Auto (AIRDOE09251)
In case there is a need to connect the curtain to a PLC, the corresponding diagram is attached�

Instructions manual - Air curtain Rund 17
Electric curtain <27kW with PRBEO and standard regulator (AIRDOE09110)
In case there is a need to connect the curtain to a PLC, the corresponding diagram is attached�

Instructions manual - Air curtain Rund
18
30kW electric curtain with standard regulator (AIRDOE09101)
In case there is a need to connect the curtain to a PLC, the corresponding diagram is attached�

Instructions manual - Air curtain Rund 19
DATA SHEET
RUND |
• Decorative rounded air curtain for vertical or horizontal installation.
• Faceted self-supporting casing construction made of galvanized plated steel, nis-
hed in structural epoxy-polyester painting white RAL9016 or silver grey RAL9006
as standard. Other colours or stainless steel are available on request.
• Large perforated inlet grille avoiding intensive maintenance.
• Anodized aluminium outlet vanes, airfoil shaped, adjustable from 0 to 15º each
side.
• Double-inlet centrifugal fans driven by an external rotor motor and low noise level.
5-speed selector. “EC” models with very low consumption efcient fans.
• “P” type with water heated coil. “E” type with electrical shielded elements, three
stages with integrated regulation. “A” type without heating, air only. Optional “DX”
with direct expansion coil.
• Includes Plug&Play control with 7m RJ45 cable and infrared remote control. Optio-
nal: Clever control (programmable, automatic, intelligent, energy saving, Modbus
RTU for BMS…).
Specications
Characteristics
Water heated: connection pipes P86 and P64 are 2x3/4” male (female if rear pipes), P54 2x1” male . P86 2 rows coil, P64 3 rows coil, P54 4 rows coil.
P86 P64 P54
m3/h kW Pa kW Pa kW Pa kW A dB(A) kg
RUND M 1000 P 1860 9,84 1000 9,22 4990 - - 0,318 1,41 55 47
RUND M 1500 P 2480 14,23 760 13,65 6430 - - 0,424 1,88 56 71
RUND M 2000 P 3720 22,17 2190 19,70 5470 - - 0,636 2,82 57 90
RUND M 2500 P 4340 27,69 4000 23,48 4060 - - 0,742 3,29 58 101
RUND M 3000 P 4960 33,15 6560 28,29 6730 - - 0,848 3,76 59 112
RUND G 1000 P 2250 11,04 1230 10,42 6190 10,56 1790 0,642 2,85 57 52
RUND G 1500 P 3000 16,02 940 15,47 8020 16,37 5670 0,856 3,80 58 77
RUND G 2000 P 4500 24,92 2700 22,29 6810 23,15 3030 1,284 5,70 59 100
RUND G 2500 P 5250 31,16 4930 26,61 5060 28,76 5450 1,498 6,65 60 109
RUND G 3000 P 6000 37,35 8110 32,10 8410 34,03 7180 1,712 7,60 61 119
RUND ECG 1000 P 2550 11,89 1400 11,27 7110 11,50 2090 0,213 1,86 61 52
RUND ECG 1500 P 3400 17,29 1070 16,77 9240 17,86 6620 0,284 2,48 62 77
RUND ECG 2000 P 5100 26,86 3080 24,14 7850 25,24 3530 0,426 3,72 63 100
RUND ECG 2500 P 5950 33,63 5650 28,84 5840 31,38 6360 0,497 4,34 64 109
RUND ECG 3000 P 6800 40,34 9290 34,81 9710 37,16 8400 0,568 5,96 65 119
m3/h kW kW A dB(A) kg
RUND M 1000 E 1980 3/6/9 0,318 1,41 55 49
RUND M 1500 E 2640 4/8/12 0,424 1,88 56 75
RUND M 2000 E 3960 6/12/18 0,636 2,82 57 97
RUND M 2500 E 4620 6/12/18 0,742 3,29 58 108
RUND M 3000 E 5280 8/16/24 0,848 3,76 59 119
RUND G 1000 E 2400 5/10/15 0,642 2,85 57 54
RUND G 1500 E 3200 7,5/15/22,5 0,856 3,80 58 81
RUND G 2000 E 4800 10/20/30 1,284 5,70 59 107
RUND G 2500 E 5600 10/20/30 1,498 6,65 60 118
RUND G 3000 E 6400 10/20/30 1,712 7,60 61 128
RUND ECG 1000 E 2700 5/10/15 0,213 1,86 61 54
RUND ECG 1500 E 3600 7,5/15/22,5 0,284 2,48 62 81
RUND ECG 2000 E 5400 10/20/30 0,426 3,72 63 107
RUND ECG 2500 E 6300 10/20/30 0,497 4,34 64 118
RUND ECG 3000 E 7200 10/20/30 0,568 5,96 65 128
m3/h kW A dB(A) kg
RUND M 1000 A 1980 0,318 1,41 55 42
RUND M 1500 A 2640 0,424 1,88 56 63
RUND M 2000 A 3960 0,636 2,82 57 79
RUND M 2500 A 4620 0,742 3,29 58 88
RUND M 3000 A 5280 0,848 3,76 59 99
RUND G 1000 A 2400 0,642 2,85 57 46
RUND G 1500 A 3200 0,856 3,80 58 68
RUND G 2000 A 4800 1,284 5,70 59 89
RUND G 2500 A 5600 1,498 6,65 60 98
RUND G 3000 A 6400 1,712 7,60 61 108
RUND ECG 1000 A 2700 0,213 1,86 61 46
RUND ECG 1500 A 3600 0,284 2,48 62 68
RUND ECG 2000 A 5400 0,426 3,72 63 89
RUND ECG 2500 A 6300 0,497 4,34 64 98
RUND ECG 3000 A 7200 0,568 5,96 65 108
Cylindrical Air Curtains
AIR ONLY ELECTRICAL HEATED
WATER HEATED
Model Airow
Power Fans
Current
Fans
Noise
Level
Weight(5m)
230V-50Hz 230V-50Hz
Electrical Heating
Capacity
Model Airow
Power Fans
230V-50Hz
Current
Fans
230V-50Hz
Noise
Level
(5m) Weight
400Vx3-50Hz
Model Airow
Power Fans
Current
Fans
Noise
Level
Weight(5m)
230V-50Hz 230V-50Hz
Heating
Capacity
80/60ºC
Water Drop
Pressure
80/60ºC
Heating
Capacity
60/40ºC
Water Drop
Pressure
60/40ºC
Heating
Capacity
50/40ºC
Water Drop
Pressure
50/40ºC

Instructions manual - Air curtain Rund
20
Ceiling xation through threaded rods
Wall/ceiling xation through angle supports
Wall xation through lateral arms
Wall/ceiling xation through arms
Vertical installation
Layouts and dimensions
Floor xation (goalpost)
Horizontal installation
L
RUND 1000 1025
RUND 1500 1525
RUND 2000 2030
RUND 2500 2530
RUND 3000 2980
Water pipes top entrance
Floor xing points with foot
Foot
Standard installation
(vertical left side)
Service
door
DOOROUTDOOR
INDOOR
RUND |Cylindrical Air Curtains