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.
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.
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.
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.
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.
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.
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.
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.
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.
