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SECTION 15831
AIR CURTAINS, COMMERCIAL
NOTE ** This section is based on products manufactured by
Mars(R) Air Doors, at the following address:
NOTE ** 14716 South Broadway
NOTE ** Gardena CA 90248
NOTE ** Tel: (213) 770-1555
NOTE ** Tel: (800) 421-1266
NOTE ** Fax: (310) 324-3030
NOTE **
NOTE ** Mars Air Doors offers a complete line of Air
Curtains providing the benefits of temperature
control and environmental separation. Models are
offered in a commercial and industrial design and
can be configured with heat. Heated units include
gas, electric, steam and hot water coil models.
NOTE ** A typical installation is over a building's
exterior door or window opening. They provide
excellent protection at reducing a building's
heating and cooling costs when these exterior doors
need to be opened. At the same time, they repel
gusts of wind and minimize the entrance of
windborne dust, fumes, pollutants, and flies.
Additionally, they help to expedite the flow of
traffic from one work area to another or in and out
the building, by providing an unobstructive view of
the opening. This section covers the commercial
part of their product line: "Service Window,"
"Whispurr Air(R)," "C-CH-CHS," "Combi(R) and
Super Combi," "Hepac(R)," and National Sanitation
Foundation (NSF) models. Commercial models
configured with heat are available in electric heat
only. For other forms of heat, see their other
Section 15832 for industrial models.
NOTE **
NOTE ** SECTION 15831 - AIR CURTAINS, COMMERCIAL, Copyright
1998, The Architect's Catalog, Inc.
PART 1 GENERAL
1.1 SECTION INCLUDES
NOTE ** Select paragraphs below applicable to project.
A. Service Window Models.
B. Whispurr Air(R) Models.
C. C-CH-CHS Models.
D. Combi(R) and Super Combi Models.
E. National Sanitation Foundation (NSF) Models.
F. High Efficiency Particulate Air Curtain (HEPAC) Models.
NOTE ** The following includes service window, C-CH-CHS
models only.
G. Air Curtains with Electric Heat.
1.2 RELATED SECTIONS
NOTE ** Sections listed in the following paragraphs
represent those most likely to relate to this
section; coordinate with other sections, delete
those not relevant to this project, add others as
required.
A. Section 08110 - Steel Doors and Frames.
B. Section 08330 - Coiling Doors and Grilles.
C. Section 08400 - Entrances and Storefronts.
D. Section 08500 - Windows.
E. Section 08580 - Pass Windows.
F. Sections of Division 16 affecting, or affected by,
construction activities of this section.
1.3 SUBMITTALS
A. Submit under provisions of Section 01300.
B. Product Data: Manufacturer's descriptive literature for
products specified in this section; indicate options
specified.
C. Shop Drawings: Indicate installation and connection
details for air curtains.
D. Quality Assurance Submittals:
1. Certificates: Indicate compliance to Regulatory
Requirements specified in QUALITY ASSURANCE Article
of this section.
2. Manufacturer's instructions: Printed installation
instructions for each specified product.
E. Closeout Submittals:
1. Operation and maintenance data: Manufacturer's
printed instructions for operating and maintaining
air curtain components.
2. Warranty documents: Issued and executed by
manufacturer.
1.4 QUALITY ASSURANCE
A. Manufacturer Qualifications: Minimum five years
documented experience producing respective products
specified in this Section.
NOTE ** Delete agency certifications below not required for
project.
B. Regulatory Requirements: Product compliance with the
following regulatory agencies:
1. Underwriters Laboratories.
2. National Sanitation Foundation (NSF models only).
3. National Electrical Code.
4. United States Food and Drug Administration.
5. United States Department of Agriculture.
1.5 DELIVERY, STORAGE, AND HANDLING
A. Store products of this section in manufacturer's unopened
packaging until installation.
B. Maintain dry, heated storage area for products of this
section until installation of products.
1.6 WARRANTY
A. Supply manufacturer's standard warranty against defects
in product workmanship and materials.
PART 2 PRODUCTS
2.1 MANUFACTURERS
A. Acceptable Manufacturer: Mars Air Doors, 14716 South
Broadway, Gardena CA 90248; ASD. Tel: (213) 770-1555 or
(800) 421-1266; Fax: (310) 324-3030.
NOTE ** Delete one of the two following paragraphs;
coordinate with Division 01 requirements.
B. Requests for substitutions will be considered in
accordance with provisions of Section 01600.
C. Substitutions: Not permitted.
2.2 MANUFACTURED UNITS
NOTE ** Retain following paragraph if specifying Mars Model
Number W-25 service window air curtains. Model W-
25 provides protection from insects, dust, and
fumes; available heated or unheated.
NOTE **
NOTE ** The housing will not crack, chip, fade, or peel,
and is impervious to high humidity and all climatic
conditions.
A. Service Window Air Curtains:
1. Acceptable Product: Mars Model Number W-25.
2. Product Description: Self-contained electrically-
operated air curtain for mounting at head or jamb of
openings up to 60 inches (1,524 mm) high by 30 inches
(762 mm) wide.
3. Housing: One piece molded high impact white
polyethylene material; resistant to high humidity and
all climatic conditions. Contains factory-provided
mounting brackets at each end, and removable,
washable aluminum mesh air intake filter.
NOTE ** Delete one of the following two paragraphs.
Variable-speed fan assembly in the first paragraph
is available on heated models only.
4. Fan Assembly: Variable-speed, double-shaft motor
with dual inlet fans having capacity to provide 1,400
feet per minute (7 m/sec) air velocity and 1,900
cubic feet per minute (897 L/sec) air volume at
nozzle, and minimum 600 feet per minute (3 m/sec) air
velocity at 2 feet (610 mm) above counter when
mounting height does not exceed 5 feet (1,524 mm)
above counter.
5. Fan Assembly: Double-shaft motor with dual inlet
fans having capacity to provide 1,400 feet per minute
(7 m/sec) air velocity and 1,900 cubic feet per
minute (897 L/sec) air volume at nozzle, and minimum
600 feet per minute (3 m/sec) air velocity at 2 feet
(610 mm) above counter when mounting height does not
exceed 5 feet (1,524 mm) above counter.
NOTE ** Delete following paragraph if specifying unit
without heater.
6. Heater Assembly: Electric heater having 4000 watt,
13,700 BTU (14,454 J) per hour output, with manual-
reset thermal overload switch and on/off control
switch.
7. Operating Noise Level: 59 decibels on A scale,
measured from interior, at 10 feet (3.048 m) from
unit.
NOTE ** Retain one of following three paragraphs; retain
first or second paragraph if specifying unit
without heater, retain third paragraph if
specifying unit with heater.
8. Utility Requirements: 115 Volts AC, single-phase,
2.6 Amperes.
9. Utility Requirements: 208/230 Volts AC, single-
phase, 1.3 Amperes.
10. Utility Requirements: 208/230 Volts AC, single-
phase, 22 Amperes.
NOTE ** Retain following paragraph if specifying Mars
Whispurr Air(R) unit. These units are 7-1/2 inches
(190 mm) high, providing a low-profile design for
restricted ceiling heights. Installed inside, they
provide a cost-effective solution for doors in
continual use or left open for extended periods.
They can also be used over walk-in cooler/freezer
doors to reduce cold air loss when door is opened.
B. Air Curtains:
NOTE ** Insert Model Number information in following
paragraph.
1. Acceptable Product: Mars Whispurr Air(R) Model
Number WA-__.
2. Product Description: Self-contained electrically-
operated air curtain for mounting at head of openings
up to 7 feet (2.134 m) high by 72 inches (1,829 mm)
wide.
3. Housing:
a. One piece molded, high impact, white polyethylene
material; resistant to high humidity and all
climatic conditions. Discharge outlet nozzle
directional vanes adjustable +/- 20 degrees front
to back.
b. Mounting plate provided with keyhole slot for
fast and easy installation and maintenance
NOTE ** Delete all but one of the following subparagraphs.
White is production color; custom colors available.
c. Color: White.
d. Color: Gray.
e. Color: Gold.
f. Color: Beige.
g. Color: Dark Bronze.
h. Color: Custom color selected by Architect.
NOTE ** Insert information into following paragraph;
consult manufacturer's product data for specific
model specifications.
4. Blower Assembly: Variable-speed motor and switch;
field adjustable with control knob capable of
reducing outlet air velocity up to 60 percent.
Injection molded type blower wheel utilizing
PolyMars(R) material; capacity to provide 1,800 feet
per minute (9 m/sec) air velocity and ____ cubic feet
per minute (____ L/sec) air volume at nozzle.
NOTE ** Retain following paragraph if specifying unit with
optional door-activated microswitch.
5. Door-Activated Microswitch: Supply microswitch for
automatic on/off control; turns air curtain on when
door is opened and off when door is closed; field
installed.
NOTE ** Delete one of the following two paragraphs.
Plunger type is for doors with hinges (swing
doors), roller type for all other types of doors.
a. Type: Plunger.
b. Type: Roller.
NOTE ** Insert information into following paragraph;
consult manufacturer's product data for specific
model specifications.
6. Operating Noise Level: __ decibels on A scale,
measured from interior, 10 feet (3.048 m) from unit.
NOTE ** Insert information into following paragraph;
consult manufacturer's product data for specific
model specifications.
7. Utility Requirements: ___ Volts AC, single-phase,
___ Ampere.
NOTE ** Retain following paragraph if specifying a Mars
Unheated C, CH, or CHS unit. The C Model is
designed for use over customer entrances, acting as
a barrier against outside climate. The CH/CHS
Models produce greater air velocity with slightly
higher sound levels and are recommended over
receiving and service entrance doors at
restaurants, hospitals, schools, food processing
plants, etc. The C, CH, and CHS models are
effective up to 8 feet (2.438 m), 10 feet (3.048
m), and 12 feet (3.658 m) high, respectively.
C. Air Curtains:
NOTE ** Insert Model Number information in following
paragraph.
1. Acceptable Product: Mars Model Number ____ C__.
2. Product Description: Self-contained electrically-
operated air curtain for mounting at head of
openings.
3. Housing:
a. One piece molded white high-impact polyethylene
material, resistant to high humidity and all
climatic conditions.
b. Internal steel bracket with sufficient strength
to provide housing rigidity and fastening to
wall.
c. Mechanically field adjustable variable air intake
louver assembly capable of reducing outlet air
velocity up to 60 percent with louvers in totally
enclosed position.
d. Wedge shaped discharge air outlet nozzle
containing adjustable air directional vanes with
a +/- 20 degree sweep from front to back.
NOTE ** Delete one of the following two paragraphs. White
is production color; gold, gray, beige, dark
bronze, and custom colors are available at a
nominal charge.
e. Color: White.
f. Color: ______________.
NOTE ** Insert information into following paragraph;
consult manufacturer's product data for specific
model specifications.
4. Blower Assembly: Direct-drive, double-width and
double-inlet squirrel cage steel blower wheels having
capacity to provide ____ feet per minute (____ m/sec)
air velocity and ____ cubic feet per minute (____
L/sec) air volume at nozzle.
NOTE ** Delete three of the following four paragraphs;
consult manufacturer's product data for specific
model specifications.
5. Motor: Single 1/2 horsepower, maximum 1,750
revolutions per minute, single-speed, with two-speed
option.
6. Motor: Single 1 horsepower, maximum 1,750
revolutions per minute, single-speed, with two-speed
option.
7. Motor: Two 1/2 horsepower, maximum 1,750 revolutions
per minute, single-speed, with two-speed option, both
controlled by single switch.
8. Motor: Two 1 horsepower, maximum 1,750 revolutions
per minute, single-speed, with two-speed option, both
controlled by single switch.
NOTE ** Retain following paragraph if specifying unit with
optional door-activated microswitch.
9. Door-Activated Microswitch: Supply microswitch for
automatic on/off control, on when door is opened, off
when door is closed; field installed.
NOTE ** Delete one of the following two paragraphs.
Plunger type is for doors with hinges (swing
doors), roller type for all other types of doors.
a. Type: Plunger.
b. Type: Roller.
NOTE ** Insert information into following paragraph;
consult manufacturer's product data for specific
model specifications.
10. Operating Noise Level: __ decibels on A scale,
measured from interior, 10 feet (3.048 m) from unit.
NOTE ** Insert information into following paragraph;
consult manufacturer's product data for specific
model specifications.
11. Utility Requirements: ___ Volts AC, ______-phase,
___ Ampere(s).
NOTE ** Retain following paragraph if specifying Mars
Heated Model C, CH, or CHS unit. Heated air
curtains must be mounted on inside of building.
They come complete with air curtain, motor control
panel (factory mounted to air curtain housing) and
wall mounted thermostat (shipped loose to be field
installed). They can be used with fan only in warm
weather, or with fan and heater in cold weather
when they will contribute to the building heating
system. Heated air curtains should primarily be
used to reduce the "wind chill" effect of the air
stream for those walking through it.
D. Air Curtains with Heater Assemblies:
NOTE ** Insert Model Number information in following
paragraph; C-1 or C-3, CH-1 or CH-3, CHS-1 or CHS-
3.
1. Acceptable Product: Mars Model Number Heated___ C__.
2. Product Description: Self-contained electrically-
operated air curtain for mounting at head of
openings.
3. Housing:
a. One piece molded white high-impact polyethylene
material, resistant to high humidity and all
climatic conditions.
b. Internal steel bracket with sufficient strength
to provide housing rigidity and fastening to
wall.
c. Mechanically field adjustable variable air intake
louver assembly capable of reducing outlet air
velocity up to 60 percent with louvers in totally
enclosed position.
d. Wedge shaped discharge air outlet nozzle
containing adjustable air directional vanes with
a +/- 20 degree sweep from front to back.
NOTE ** Delete one of the following two paragraphs. White
is production color; gold, gray, beige, dark
bronze, and custom colors are available at a
nominal charge.
e. Color: White.
f. Color: ______________.
NOTE ** Insert information into following paragraph;
consult manufacturer's product data for specific
model specifications.
4. Blower Assembly: Direct-drive, double-width and
double-inlet squirrel cage steel blower wheels having
capacity to provide ____ feet per minute (____ m/sec)
air velocity and ____ cubic feet per minute (____
L/sec) air volume at nozzle.
NOTE ** Delete three of the following four paragraphs;
consult manufacturer's product data for specific
model specifications.
5. Motor: Single 1/2 horsepower, maximum 1,750
revolutions per minute, single-speed, with two-speed
option.
6. Motor: Single 1 horsepower, maximum 1,750
revolutions per minute, single-speed, with two-speed
option.
7. Motor: Two 1/2 horsepower, maximum 1,750 revolutions
per minute, single-speed, with two-speed option, both
controlled by single switch.
8. Motor: Two 1 horsepower, maximum 1,750 revolutions
per minute, single-speed, with two-speed option, both
controlled by single switch.
NOTE ** Retain one of the three following paragraphs if
specifying unit with optional door-activated
microswitch.
9. Door-Activated Microswitch: Supply microswitch for
automatic on/off control, on when door is opened, off
when door is closed; field installed.
NOTE ** Delete one of the following two paragraphs.
Plunger type is for doors with hinges (swing
doors), roller type for all other types of doors.
a. Type: Plunger.
b. Type: Roller.
NOTE ** Electric heated units can feature optional delay
microswitches. Delay microswitches feature delay
timers pre-mounted in the control panel. Delay
microswitches keep the air curtain running for a
specified period of time after the door is closed,
preventing the electric coil from cooling down
after the door closes, thereby providing the
necessary heat on demand when the door is re-
opened. They are best used when sporadic traffic
flows through the door opening. Two types are
offered; select from the following two paragraphs.
10. Fixed Delay Microswitch:
NOTE ** Select one of the following paragraphs.
a. Delay: 30 seconds, factory preset.
b. Delay: 60 seconds, factory preset.
c. Delay: 90 seconds, factory preset.
d. Delay: 120 seconds, factory preset.
e. Delay: 240 seconds, factory preset.
f. Delay: 600 seconds, factory preset.
NOTE ** Delete one of the following two paragraphs.
Plunger type is for doors with hinges (swing
doors), roller type for all other types of doors.
g. Type: Plunger.
h. Type: Roller.
11. Adjustable Time Delay Microswitch: Field adjustable
to 17 minutes.
NOTE ** Delete one of the following two paragraphs.
Plunger type is for doors with hinges (swing
doors), roller type for all other types of doors.
a. Type: Plunger.
b. Type: Roller.
NOTE ** Insert information into following paragraph;
consult manufacturer's product data for specific
model specifications.
12. Operating Noise Level: __ decibels on A scale,
measured from interior, 10 feet (3.048 m) from unit.
NOTE ** Insert information into following paragraph;
consult manufacturer's product data for specific
model specifications.
13. Heater Assembly: Electric heater, ______ watts,
______ BTUs (______ J) per hour output, with
temperature limit controller.
14. Thermostat: Wall-mounted, 24-Volt operation, with
heater on/fan on and heater off/fan on selection.
NOTE ** Insert information into following paragraph;
consult manufacturer's product data for specific
model specifications.
15. Utility Requirements: ___ Volts AC, ______-phase,
___ Ampere(s).
NOTE ** Retain following paragraph if specifying Mars
COMBI(R) units. These units are available only
unheated. Otherwise, they can be used for the same
purposes as the C, CH, and CHS models.
E. Air Curtains:
NOTE ** Insert Model Number information in following
paragraph.
1. Acceptable Product: Mars Model Number ____ COMBI(R).
2. Product Description: Self-contained electrically-
operated air curtain for mounting at head of openings
up to 10 feet (3.048 m) high.
3. Housing:
a. One piece molded white high-impact polyethylene
material, resistant to high humidity and all
climatic conditions.
b. Internal steel bracket with sufficient strength
to provide housing rigidity and fastening to
wall.
c. Mechanically field adjustable variable air intake
louver assembly capable of reducing outlet air
velocity up to 60 percent with louvers in totally
enclosed position.
d. Wedge shaped discharge air outlet nozzle
containing adjustable air directional vanes with
a +/- 20 degree sweep from front to back.
NOTE ** Delete all but one of the following subparagraphs.
White is standard; custom colors available.
e. Color: White.
f. Color: Gray.
g. Color: Gold.
h. Color: Beige.
i. Color: Dark Bronze.
j. Color: Custom color selected by Architect.
NOTE ** Insert information into following paragraph;
consult manufacturer's product data for specific
model specifications.
4. Blower Assembly: Direct-drive, double-width and
double-inlet squirrel cage steel blower wheels having
capacity to provide ____ feet per minute (____ m/sec)
air velocity and ____ cubic feet per minute (____
L/sec) air volume at nozzle.
NOTE ** Delete one of the following two paragraphs; consult
manufacturer's product data for specific model
specifications.
5. Motor: Single 1/2 horsepower, three-speed, with
three-speed on/off control switch; single phase only.
6. Motor: Two 1/2 horsepower, three-speed, both
controlled by single three-speed on/off control
switch; single phase only.
NOTE ** Retain following paragraph if specifying unit with
optional door-activated microswitch.
7. Door-Activated Microswitch: Supply microswitch for
automatic on/off control, on when door is opened, off
when door is closed; field installed.
NOTE ** Delete one of the following two paragraphs.
Plunger type is for doors with hinges (swing
doors), roller type for all other types of doors.
a. Type: Plunger.
b. Type: Roller.
NOTE ** Insert information into following paragraph;
consult manufacturer's product data for specific
model specifications.
8. Operating Noise Level: __ decibels on A scale,
measured from interior, 10 feet (3.048 m) from unit.
NOTE ** Insert information into following paragraph;
consult manufacturer's product data for specific
model specifications.
9. Utility Requirements: ___ Volts AC, ______-phase,
___ Ampere(s).
NOTE ** Retain following paragraph if specifying Mars Type
NSF units, available unheated only. The NCH suffix
models, for customer entrance doors, utilize one or
two 1/2-horsepower motors, providing up to 3,400
FPM (17 m/sec) air velocity at the nozzle and 600
FPM (3 m/sec) measured 3 feet (0.914 m) off the
floor. The NHV prefix models, for receiving doors,
utilize one 1-horsepower motor, providing up to
4,600 FPM (23 m/sec) air velocity at the nozzle and
1,600 FPM (8 m/sec) measured 3 feet (0.914 m) off
the floor.
F. National Sanitation Foundation (NSF) Certified Air
Curtains:
NOTE ** Insert Model Number information in following
paragraph.
1. Acceptable Product: Mars Model Number ____.
2. Product Description: Self-contained electrically-
operated air curtain for mounting at head of openings
up to 12 feet (3.658 m) high.
3. Housing:
a. One piece molded white high-impact polyethylene
material, resistant to high humidity and all
climatic conditions.
b. Internal steel bracket with sufficient strength
to provide housing rigidity and fastening to
wall.
c. Washable aluminum mesh air intake filter.
d. Wedge shaped discharge air outlet nozzle
containing adjustable air directional vanes with
a +/- 20 degree sweep from front to back.
NOTE ** Delete all but one of the following subparagraphs.
White is standard; custom colors available.
e. Color: White.
f. Color: Gray.
g. Color: Gold.
h. Color: Beige.
i. Color: Dark Bronze.
j. Color: Custom color selected by Architect.
4. Motors and Blower Wheels: Totally enclosed air over
(TEAO) type motor(s), suitable for continuous heavy
duty, all angle operation.
NOTE ** Delete the following paragraph unless explosion
proof motors are required.
a. Explosion proof.
b. Sealed lifetime pre-lubricated ball bearings,
resilient mounted and protected by an automatic
reset thermal overload switch.
c. Quick disconnect plugs for fast easy removal of
motor/fan assemblies for inspection and cleaning.
NOTE ** Insert information into following paragraph;
consult manufacturer's product data for specific
model specifications.
d. Double extended shaft and direct drive, double
inlet, dynamically balanced forward curved
squirrel cage blower wheels having capacity to
provide ____ feet per minute (____ m/sec) air
velocity and ____ cubic feet per minute (____
L/sec) air volume at nozzle.
NOTE ** Delete two of the following three paragraphs;
consult manufacturer's product data for specific
model specifications.
e. Motor: Single 1/2 horsepower, maximum 1,750
revolutions per minute, single-speed, with two-
speed option.
f. Motor: Single 1 horsepower, maximum 1,750
revolutions per minute, single-speed, with two-
speed option.
g. Motor: Two 1/2 horsepower, maximum 1,750
revolutions per minute, single-speed, with two-
speed option, both controlled by single switch.
NOTE ** Insert information into following paragraph;
consult manufacturer's product data for specific
model specifications.
5. Utility Requirements: ___ Volts AC, ______-phase,
___ Ampere(s).
NOTE ** Delete one of the following two paragraphs.
Junction box mounted on right side is standard;
complete the second paragraph if an alternative
mounting is required.
6. Electrical Wiring: Junction box mounted on right
side.
7. Electrical Wiring: Junction box mounted ___________.
NOTE ** Retain following paragraph if specifying unit with
optional door-activated microswitch(s).
8. Door-Activated Microswitch(s): Supply 20 amp
microswitch(s) for automatic on/off control, on when
door is opened, off when door is closed; field
installed.
NOTE ** Delete one of the following two paragraphs.
Plunger type is for doors with hinges (swing
doors), roller type for all other types of doors.
a. Type: Plunger.
b. Type: Roller.
NOTE ** Mars recommends the use of a motor control panel on
three phase motors whenever a door microswitch is
used to start and stop the air curtain. One door
microswitch is used to directly control one or two
1/2 HP single phase motors without the need for a
motor control panel. If a motor control panel is
required, select one of the following two
paragraphs and indicate the total number of motors
(1, 2, 3, or 4) to be powered through the panel.
9. Wall Mounted Control Panel: Power ___ motors through
the panel.
10. Factory Mounted Control Panel on Air Curtain: Power
___ motors through the panel.
NOTE ** Insert information into following paragraph;
consult manufacturer's product data for specific
model specifications.
11. Operating Noise Level: __ decibels on A scale,
measured from interior, 10 feet (3.048 m) from unit.
NOTE ** Retain following paragraph if specifying Mars Super
COMBI units. These units utilize 1 horsepower
motors and provide up to 4,600 FPM (23 m/sec) at
the nozzle. They are available unheated only and
can be used for the same purposes as CHS models.
G. Air Curtains:
NOTE ** Insert Model Number information in following
paragraph.
1. Acceptable Product: Mars Model Number ____ Super
COMBI.
2. Product Description: Self-contained electrically-
operated air curtain for mounting at head of openings
up to 12 feet (3.658 m) high.
3. Housing:
a. One piece molded white high-impact polyethylene
material, resistant to high humidity and all
climatic conditions.
b. Internal steel bracket with sufficient strength
to provide housing rigidity and fastening to
wall.
c. Mechanically field adjustable variable air intake
louver assembly capable of reducing outlet air
velocity up to 60 percent with louvers in totally
enclosed position.
d. Wedge shaped discharge air outlet nozzle
containing adjustable air directional vanes with
a +/- 20 degree sweep from front to back.
NOTE ** Delete all but one of the following subparagraphs.
White is standard; custom colors available.
e. Color: White.
f. Color: Gray.
g. Color: Gold.
h. Color: Beige.
i. Color: Dark Bronze.
j. Color: Custom color selected by Architect.
NOTE ** Insert information into following paragraph;
consult manufacturer's product data for specific
model specifications.
4. Blower Assembly: Direct-drive, double-width and
double-inlet squirrel cage steel blower wheels having
capacity to provide ____ feet per minute (____ m/sec)
air velocity and ____ cubic feet per minute (____
L/sec) air volume at nozzle.
NOTE ** Delete one of the following two paragraphs; consult
manufacturer's product data for specific model
specifications.
5. Motor: Single 1 horsepower, two-speed, with two-
speed on/off control switch; single phase only.
6. Motor: Two 1 horsepower, two-speed, both controlled
by single two-speed on/off control switch; single
phase only.
NOTE ** Retain following paragraph if specifying unit with
optional door-activated microswitch.
7. Door-Activated Microswitch: Supply microswitch for
automatic on/off control, on when door is opened, off
when door is closed; field installed.
NOTE ** Delete one of the following two paragraphs.
Plunger type is for doors with hinges (swing
doors), roller type for all other types of doors.
a. Type: Plunger.
b. Type: Roller.
NOTE ** Insert information into following paragraph;
consult manufacturer's product data for specific
model specifications.
8. Operating Noise Level: __ decibels on A scale,
measured from interior, 10 feet (3.048 m) from unit.
NOTE ** Insert information into following paragraph;
consult manufacturer's product data for specific
model specifications.
9. Utility Requirements: ___ Volts AC, ______-phase,
___ Ampere(s).
NOTE ** Retain following paragraph if specifying Mars
HEPAC(R) unit Model HF40. HEPAC(R) air curtains
contain a pre-filter and HEPA filter that is rated
at 99.97 percent efficiency at removing airborne
particle down to 0.3 microns, including dust,
bacteria, molds, pollens, and tobacco smoke.
NOTE **
NOTE ** Mars HEPAC(R) units are supplied with electrical
cord and standard wall outlet plug; they can also
be used in portable bench top operations and are
effective when placed adjacent to critical work
areas.
NOTE **
NOTE ** To be mounted inside building only, their typical
use is over an entrance to a cleanroom.
H. High Efficiency Particulate Air Curtain (HEPAC(R)):
1. Acceptable Product: Mars Model Number HF40.
2. Product Description: Self-contained electrically-
operated air curtain for mounting at head of openings
up to 8 feet (2.438 m) high.
3. Housing:
a. One piece molded white high-impact polyethylene
material, resistant to high humidity and all
climatic conditions.
b. Internal steel bracket with sufficient strength
to provide housing rigidity and fastening to
wall.
c. Mechanically field adjustable variable air intake
louver assembly capable of reducing outlet air
velocity up to 60 percent with louvers in totally
enclosed position.
d. Wedge shaped discharge air outlet nozzle
containing adjustable air directional vanes with
a +/- 20 degree sweep from front to back.
NOTE ** Delete one of the following two paragraphs. White
is production color; custom colors available.
e. Color: White.
f. Color: Custom color selected by Architect.
4. Blower Assembly: Direct-drive, double-width and
double-inlet squirrel cage steel blower wheels having
capacity to provide ____ feet per minute (____ m/sec)
air velocity and ____ cubic feet per minute (____
L/sec) air volume at nozzle.
NOTE ** Insert information into following paragraph;
consult manufacturer's product data for specific
model specifications.
5. Utility Requirements: 1/2 horsepower motor, ___
Volts AC, ______-phase, ___ Ampere(s).
I. Fastening Devices: Types recommended in manufacturer's
printed installation instructions for indicated
substrates.
PART 3 EXECUTION
3.1 EXAMINATION
A. Verify that required utilities are in correct location
and are of correct capacities for specified products.
3.2 INSTALLATION
A. Install air curtains in accordance with shop drawings and
manufacturer's printed installation instructions.
B. Connection to utilities is specified in Sections of
Division 16.
END OF SECTION