SterilGARD^® e3 SG403a HE / SG503a HE / SG603a HE

SterilGARD® e3 Class II, Type A2* Biological Safety Cabinet, Vertical Flow (Options shown: Channel Stand, Petcocks on Right) CSA Listed Meets NSF Standards Underwriter Laboratories Listed UniPressure™ Preflow Plenum Click here for an interactive tour Click here to download product literature

SterilGARD^® e3 sets the Industry’s Highest Standard for Comfort, Performance, Safety, and now High Efficiency!

In the laboratory environment, safety is everything. Now, with the introduction of SterilGARD^® e3, The Baker Company offers a new adaptive ergonomic design, combined with a unique airflow management system and proven containment technology, to improve comfort, increase productivity and reduce the cost of ownership.

SterilGARD^® e3 is a collective design, representing an esteemed reputation for performance, reliability and craftsmanship associated with The Baker Company worldwide for nearly 50 years.

SterilGARD^® e3 starts with a simple idea: a better angle. From your first experience with the 10° slanted viewscreen, you’ll appreciate how easy the SterilGARD^® e3 is to use. Your work is easy to reach. There’s more functional room inside. Eye-level controls are easy to see. There is less glare. As you work, your head and neck, arms and elbows, remain in the most natural position, less tiring than before.

Along the streamlined viewscreen, concealed behind the attractive front panels, you’ll find another Baker exclusive—UniPressure™ Preflow, an elegantly simple yet effective air management system that puts more uniform air pressure on the supply filter for better vertical flow across the work surface. A simple idea, to be sure, but by moving the blower/motor to a horizontal orientation from vertical, we’ve created a more efficient, less demanding and quieter airflow system.

Exclusive 10° slanted viewscreen– less glare, work easier to reach.

And years later, if it comes time for maintenance, your certifier will find the cabinet easy to seal and easy to decontaminate. Our new direct-to-plenum filter mounting technique puts the HEPA filter on a telescoping frame, within easy reach, easy to change.

SterilGARD^® e3 is the most exciting development in biological safety cabinets in years. Consider the angle. Learn more about SterilGARD^® e3. It’s what you would expect from The Baker Company.

*Properly vented to the outdoors through a facility exhaust system, SterilGARD^® e3 meets or exceeds NSF 49 minimum standards for a Class II, Type A2 (formerly B3) cabinet.

Design and Performance Features
SterilGARD^® e3 incorporates UniPressure™ Preflow, the Baker exclusive high performance airflow system which provides optimum protection from particulates, together with extended filter life and reduced cost of ownership.

• The unique UniPressure™ Preflow Plenum design apportions and distributes air across, then through the HEPA supply filter, improving downflow uniformity, extending useful filter life and reducing noise.
• The UniPressure™ Preflow filter housing creates negative pressure surrounding the positive pressure plenum to improve containment; any possible gasket leaks are contained under negative pressure.
• An innovative telescoping filter mount provides a direct seal of the filter to the UniPressure™ Preflow Plenum, and simplifies filter replacement.
• Supply and exhaust HEPA filters are rated at 99.99% minimum efficiency in capturing 0.3 micrometer particulates.
• The Baker exclusive momentum air curtain contains particulates within the work area and inhibits migration of room air into the work area.
• High velocity return air slots located along the side walls of the work area and along the top of the viewscreen maximize the biological safety cabinet protective capabilities by preventing the escape of particulates, ensuring that no unfiltered air enters the work area, and preventing gases, vapors or particulates from migrating up behind the viewscreen and escaping into the operator’s environment.
• Aerodynamically designed airfoil at the front opening facilitates the flow of room air into the front grille, ensuring that no room air flows into the work area.
• Innovative electronic controller includes diagnostic LEDs.
• An audible/visual sash alarm system warns of unsafe viewscreen opening.
• Sash position is monitored by non-contact proximity switches.
• A large, easy-to-read magnehelic gauge confirms cabinet operation.
• Detachable side panels offer greater flexibility for plumbing considerations; the reinforced panel design reduces the number of fasteners and simplifies removal and replacement.
• The front panels are lighter and easier to remove for filter changing.
• Arm Rest with Low-Flow bypass. This allows air to flow into the cabinet with the viewscreen completely closed.

1. The enlarged viewing area, is slanted 10° to create a more natural head and elbow position when working, minimizing arm extension required to reach the work surface.

2. Low profile, unitized drain pan beneath the work surface allows best arm position above the user’s lap. New one piece work surface/air intake grille with pull tabs replaces earlier two-piece design.

3. Eye-level controls face down toward the user, for greater visibility and easier access.

4. Inovative electronic controller includes diagnostic LEDs.

5. Optional stand with telescoping legs allow the work surface to be adjusted from 30 1/8" to 38 5/8".

6. Audible/visual sash alarm with timer and mute switch encourages safe operation.

7. A large, easy-to-read magnehelic gauge confirms cabinet operation.

8. High velocity return air slots maximize protective capabilities.

9. HEPA supply and exhaust filters, 99.99% minimum efficiency for 0.3 micrometer particulates.

10. New Motor Speed Controller automatically compensates for normal power line variations and filter loading, maintaining constant airflow.

11. Energy-saving fluorescent lighting with solid-state ballasts reduce flicker, minimize heat output, improves eye comfort, and extends lamp life by as much as 50%.

12. Non-glare work surface improves comfort.

13. Ground-fault circuit interrupt (GFCI) outlets for user safety; trip light warns circuit has been disconnected because of ground fault error. Outlet circuit is protected by an independent self-resetting breaker.

14. Straight back wall with integrated rear grille creates the largest unobstructed work surface. Inside cabinet is extended 2" deeper, creating 110 sq.in. (403A HE), 170 sq.in. (603A HE) additional work space.

15. Non-contact proximity switches replace mechanical limit switches for view-screen height alarm, and UV light interlock.

16. Innovative horizontal blower/motor with multi-voltage speed controller maintains air veloocity, provides more uniform airflow to the filter.

17. Internal balancing damper reduces exhaust velocity by more than 75 percent, minimizing room air turbulence.

18. Versatile canopy exhaust connection protects cabinet performance.

19. Unipressure™ Preflow Plenum delivers quieter, more efficient performance, simplifies filter changing.

20. Streamlined design simplifies sealing for pressure leak testing or cabinet decontamination.

Class II, Type A2 Applications
The SterilGARD^® e3biological safety cabinet is designed for sterile product preparation and biological experimentation involving agents of low and moderate risk.

• When exhausted to the room, SterilGARD^® e3 is classified a Class II, Type A2 cabinet.
• Properly vented to the outdoors through a facility exhaust system, SterilGARD^® e3 exceeds minimum standards for a Class II, Type A2 cabinet (formerly B3).

Momentum Air Curtain Increases
Protection Without Restricting Access

Momentum Air Curtain Click to enlarge

SterilGARD^® e3 employs a unique momentum air curtain which offers an added measure of containment and protection exclusive to the Baker design.

• This unique airflow design creates a more impenetrable air barrier or momentum air curtain at the front of the cabinet, increasing the cabinet’s protective capabilities.
• The strategic position of the stainless steel diffuser just below the supply filter creates a faster airflow of a nominal 100 FPM at the front of the work zone.
• Airflow over the center of the work surface is relatively slower at a nominal 55 FPM.
• The resulting air curtain, high velocity return air slots, aerodynamically contoured front opening surfaces, and optimum air intake velocity, combine to minimize turbulence and prevent migration of airborne contaminants into or out of the work area.

Balanced Airflow And Exhaust Assure Uniformity

SterilGARD® e3 Airflow Click to enlarge

The SterilGARD^® e3
features superb airflow characteristics
which deliver unidirectional, downflow
air over the work area for maximum
containment and protection.

• Filtered air descends from top to bottom of the work area in a unidirectional flow. Near the center of the work surface, the air current divides; a portion of the downflow air is pulled through the back wall grille and the remainder is pulled through the front perforated grille.
• Simultaneously, room air is pulled through the front access opening and into the front perforated grille. It does not enter the work area. The calculated average intake air setpoint velocity at the front access opening is 105 FPM.
• All air is combined under the work surface. From this point, contaminated air is pulled under negative pressure through a plenum up the rear and sides of the cabinet into the blower/motor, which blows it into a positive pressure plenum.
• From the positive pressure plenum, approximately 30% of the air exits the system through the exhaust filter. The remaining 70% passes through the supply filter and re-enters the work area as particulate-free air.

High Velocity Return Air Slots Capture Unfiltered Air
Containment and cleanliness are accomplished with precise control of airflow volumes and velocities. A unique feature in the Baker cabinet design, the high velocity return air slots, have been proven to maximize the biological safety cabinet protective capabilities.

• High velocity return air slots are located along the side walls of the work area and along the top of the viewscreen.
• Air is drawn into these slots at approximately 1,000 FPM, preventing the escape of particulates and ensuring that no unfiltered air enters the work area.
• High velocity return air slots located along the top of the sliding viewscreen prevent gases, vapors or particulates from migrating up behind the viewscreen and escaping into the operator’s environment, and prevent room air from migrating down behind the viewscreen and contaminating the work area.

Microprocessor Controls

The microprocessor-based membrane control panel simplifies operation.

The SterilGARD^® e3 microprocessor control system incorporates a unique sealed membrane control panel which is easily cleaned, moisture-proof and exceptionally reliable. A variety of important safety features have been designed into the control system.

• Innovative electronic controller includes LED displays and diagnostic functions.
• The control panel is positioned to face down towards the user for improved visibility and easier access.
• The sash alarm timer and audible alarm mute button override the alarm for 5 minutes when the sash is raised for cleaning, loading or unloading.
• The membrane panel is just .03 inch thick, with a smooth surface for cleanability.
• Large buttons with icons are easy to identify and operate.

Negative Pressure Double-Wall Plenums Enhance Safety

The SterilGARD® e3 has a unique negative pressure enclosure which provides additional containment capability. The cabinet work area and plenums containing contaminated air under positive pressure are surrounded by negative pressure areas. Click to enlarge

The all-metal, double wall design in SterilGARD^® e3 creates base, side and rear wall plenums which capture and contain contaminated air under negative pressure. This unique Baker design feature prevents contaminated air from escaping into the laboratory environment in the event of a puncture or leak in the cabinet.

Any plenum which contains biologically contaminated air under positive pressure is completely surrounded by negative pressure areas.

High Visibility Viewscreen With Sash Alarm
SterilGARD^® e3 has a streamlined 10° slanted sliding viewscreen which makes the cabinet easier to use and more comfortable to work in.

• The viewing area is slanted 10º for a more comfortable head and elbow position when working; minimizes arm extension required to reach the work surface.
• New one-piece work surface/air intake grille with pull tabs replaces earlier two-piece design.
• The operator’s head, neck, arms and elbows remain in the most natural position to improve comfort and reduce fatigue.
• All work is within reach; the angled viewscreen design provides a safe, highly visible and easily accessible work area for a range of procedures.
• The slanted viewscreen minimizes glare.
• The vertical lift viewscreen is constructed of 1/4" safety plate glass.
• The sash has an 8" (or optional 10" on SG403A HE / SG603A HE 12" on SG503A HE) working opening with an average calculated air intake velocity of 100-110 FPM.
• A maximum viewscreen sash opening of 20" simplifies equipment and instrument loading and unloading.
• An integrated viewscreen sash alarm includes an audible and visual indicator to warn of improper sash opening above or below the factory set height. The alarm is disabled when the sash is fully closed.
• The viewscreen sash alarm timer and audible alarm mute button override the alarm for 5 minutes when the sash is raised for cleaning, loading or unloading.

UniPressure™ Preflow
Advanced Filter Plenum Design

The Baker exclusive UniPressure™ Preflow Plenum provides quieter, more efficient operation.

The SterilGARD^® e3 incorporates UniPressure™ Preflow, a revolutionary air delivery system which offers significant benefits through unique integration of supply and exhaust HEPA filter assemblies, a telescoping filter mount, an all-steel plenum with adjustable internal damper assembly, and a new horizontal blower/motor configuration.

• Located between the HEPA filters, the supply air plenum is configured to provide more uniform airflow to the supply filter, while reducing noise and increasing reserve motor/blower capacity.
• The all-steel telescoping plenum clamps directly to the HEPA filters. Force is applied to the full perimeter of the filters rather than point force.
• A closed-cell neoprene gasket forms an airtight seal around the filter periphery.
• The horizontal blower assembly creates more uniform air direction to the supply HEPA filter, thereby reducing noise, increasing motor reserve and extending filter life.
• A new internal damper simplifies airflow balance and cabinet sealing for decontamination.

Supply and Exhaust Filter Performance
Because filters remove microorganisms and airborne particulates (generally called aerosols) from the air, the quality, performance and useful life of supply and exhaust filters are critical considerations in the biosafety environment.

• Each filter in each Baker cabinet is scan tested for leaks and tested for overall efficiency by the manufacturer, then individually scan tested by Baker after installation to assure leak-free performance.
• Minimum filter efficiency is 99.99% for particulates 0.3 micrometers, increased efficiency for particulates greater and smaller than 0.3 micro-meters.
• Both exhaust and supply HEPA filters can be inserted and removed from the front of the cabinet. This time-saving feature is useful if the cabinet is connected to an exhaust duct.
• A closed-cell neoprene gasket provides an airtight seal between the filter assembly and the metal plenum.

Blower/Motor System Helps Extend Filter Life
Baker has selected an optimum blower/motor combination to assure performance and to extend filter life to an average of 9 to 12 years, the longest life in the industry. The Baker blower/motor provides a consistent volume of air despite increases in resistance due to filter loading, resulting in extremely long filter life as verified by simulated filter loading tests.

Extended filter life minimizes filter replacement and decontamination costs, and diminishes the hazard to personnel by reducing the frequency of opening the contaminated areas of the cabinet. The more filter resistance the blower/motor system can overcome, the longer between filter changes.

• As particulates fill the filter media, resistance to airflow increases.
• The Baker blower motor is capable of automatically handling a 250% increase in pressure drop across filter with not more than 10 percent reduction in total air delivery. 
• The motor blower combination continually regulates the air volume to the end of the useful life of the filter.
• The filter need not be changed until the blower/motor system cannot deliver adequate air volume to maintain the nominal setpoint, ±5 FPM.

Easier On-Site Certification and Testing
Several SterilGARD^® e3 design features combine to simplify certification and maintenance for qualified service personnel, thus reducing downtime and improving life cycle costs.

• A telescoping plenum assembly puts the supply and exhaust HEPA filters within easy reach, and allows the filters to be clamped directly to the plenum against the closed-cell neoprene gasket.
• Both exhaust and supply filters can be easily inserted and removed from the front of the cabinet. This time-saving feature is useful if the cabinet is connected to an exhaust duct or if the room has a low ceiling.
• An internal adjustable damper allows the certifier to compensate for changing resistance of supply and exhaust filters; the damper regulates the balance between intake and downflow so that the proper air circulation ratios are maintained.
• Manual speed adjustment allows the certifier to increase blower/motor speed to compensate for filter loading.

Ergonomic benefits of the SterilGARD^® e3 include new flicker-free fluorescent lamps and electronic ballasts which provide better visibility, less heat at the face (front) of the cabinet, and improved user comfort.

• Lamps provide an average of 120 foot-candles of illumination at the work surface.
• Electronic ballasts reduce fluorescent lamp flicker, minimizing eye strain and improving productivity.
• The warm, natural illumination exhibits better color fidelity.

Optional Ultraviolet Lamp Includes Safety Interlock
An optional ultraviolet germicidal lamp assists in contamination control.

• The UV light interlock assures that UV illumination occurs only when the sash is fully closed.
• For added safety, the UV germicidal light switch and cabinet lighting cannot be turned on simultaneously.

Cabinet Construction Enhances Performance, Minimizes Downtime
Baker cabinet designs represent many years of experience in stainless steel fabrication and craftsmanship. Design considerations such as wide radius corners, aerodynamically shaped surfaces and non-glare satin finish interiors combine to improve comfort, simplify cleaning and maintain proper containment.

• SterilGARD^® e3 includes a corrosion-resistant, 16-gauge, Type 304 stainless steel work surface with smooth radiused corners to permit easy cleaning. The recessed work area retains spills.
• The satin finish work surface diminishes harsh light reflection.
• A protective grille, located under the work surface at the bottom of the rear and side return air plenums, prevents wipes and other paper materials from being inadvertently drawn into the blower system. This eliminates costly decontamination and down time to extract materials from the blower.
• Work area side walls and rear wall are one-piece, 16-gauge stainless steel construction with 7/16" radiused corners for cleaning convenience.
• The position of the stainless steel air diffuser/filter protector located below the supply filter in the work area creates the momentum air curtain at the front opening and provides filter protection.
• The 16-gauge cold-rolled steel exterior cabinet is protected with a white baked enamel finish.
• The entire cabinet is airtight. Each component is welded, gasketed or assembled with hermetically sealed joints. Each cabinet is bubble tested under pressure to ensure the integrity of these seals.
• To facilitate cleaning the drain pan, the work surface and supports are easily removed and the drain pan has large 7/16" radii on all sides.
• Outlets are provided with drip-proof covers and are protected by one self-resetting circuit breaker.

Electrical System Offers Safety And Convenience
The SterilGARD^® e3 electrical system is designed for safety and convenience.

• GFCI protected duplex outlets are provided, one on each work area side wall.
• Each outlet is provided with a drip proof cover.
• The outlet circuit is protected by an independent self-resetting circuit breaker to help isolate the cabinet control circuits from possible overloads on the outlet circuit.
• Environmentally sealed connectors and fittings are used to provide reliable containment for cabinet penetrations.
• A single power cord and plug which serves as the disconnect device for the cabinet assures that a second power source is not unintentionally left connected when maintenance functions are performed.
• The SterilGARD^® e3 is cULus Listed for electrical safety and integrity.

Functional Utilities With Petcocks, Valves and Plumbing Connections
Plumbing and drainage connections are strategically placed for both convenience and proper air management within the airflow plenums.

• One petcock and one plugged penetration are provided as standard on the left side wall. Right side wall is pre-punched for optional/additional plumbing connections.
• Petcocks and penetrations are offset, not one on top of the other, for easier access and use.
• External plumbing connections are made to the bottom (or optionally top or back) of the cabinet rather than through its sides. This arrangement allows installation next to building walls or furniture to the right or left of the cabinet, saving valuable lab space.
• A stainless steel ball valve provides safe and effective drainage of the drain pan.
• A cable port through negative pressure sidewalls to allow passage of tubes or cables. 

Options and Accessories
For convenience, most options, accessories and modifications are factory installed and should be specified when ordering. Commonly requested options are listed below. For detailed information on accessories and modifications, contact The Baker Company.

• 10" viewscreen sash opening (12" on SG503A HE)
• UV germicidal lamp
• Stainless steel IV bar
• Additional petcock (specify label and location)
• Plumb to top
• Plumb to rear
• Plastic storage bins
• Mass Airflow Monitor
• Ergonomic adjustable footrest
• Type A2 exhaust kit, canopy connection
• Decon seal box
• Reinforced work surface
• Seismic restraints
• Optional stand with telescoping legs
• Optional stand with casters
• Remote controlled petcocks

To Order
For ordering information, terms and conditions of sale, contact Baker or click here for the name of your authorized Baker representative.

The SterilGARD® e3 is also available in a 3' Model SG303.** For literature and information contact Baker.

SG303

¹Inside cabinet is extended 2" deeper, creating 110 sq.in. (403A HE), 170 sq.in. (603A HE) additional work area.
**SG303 is not NSF or UL listed. SG303 is ETL listed.
***Usable work space dimensions.

SterilGARD^® e3
Model Number:
SG403A HE, 4-foot
SG503A HE, 5-foot
SG603A HE, 6-foot

NSF Classification:
Class II, Type A2
Cabinet Type: Bench (Stand Optional)

Site Preparation
Electrical System

• 115VAC, 20A, 60 Hz, I phase.
• One 16-foot power cord with 20-amp plug, NEMA 5-20P.
• Unit is cULus listed as certified for electrical, fire and personal safety.
• Two ground-fault interrupt protected interior duplex receptacles at 5.0 (SG403A HE), 3.0 (SG603A HE) total amps, controlled by a self-resetting circuit breaker.

Exhaust Requirement*

• 403A HE – 322 – 520 CFM at 0.05 – 0.25” w.c. (8” sash)
• 503A HE – 412 – 680 CFM at 0.10 – 0.35” w.c. (8” sash)
• 603A HE -  490 – 754 CFM at 0.15 – 0.40” w.c. (8” sash)

Exhaust Options
The SterilGARD^® e3 is designed for Type A2 installations. For added convenience, the cabinet design includes several innovative features which offer flexibility.

Both supply and exhaust HEPA filters can be inserted and removed from the front of the cabinet, allowing filter replacement without removing exhaust connections.

Canopy Exhaust
Connection (CEC)
Laboratories which share common exhaust systems typically experience changes in airflow which can compromise cabinet operation. Such problems include (a) too much room air being drawn through the cabinet, causing potential product contamination, or (b) too little air drawn through the cabinet, compromising personnel protection. Located between the cabinet exhaust HEPA filter and the building exhaust system, the canopy exhaust air gap maintains Type A2 cabinet performance over a range of exhaust flow rates (see chart). Type A2 cabinet performance is also maintained in the event of total building exhaust failure. The SterilGARD^® e3 canopy exhaust connection (CEC) incorporates the following features:

• Designed for quick, efficient installation to protect cabinet from performance degradation caused by in-house exhaust system fluctuation.
• Unique combination design consists of an Exhaust Transition (ET) which creates the desired air gap in the overall connection.
• Exhaust connection collar is 10" diameter on the CEC403A HE (for the 4' cabinet) and 10" diameter on the CEC603A HE (for the 6' cabinet).

• Exhaust and supply filters zero-probed HEPA, both 99.99% efficient on all particles 0.3 micrometers by DOP test.

Purchase Specification
SterilGARD^® e3 Class II, Type A2 Biological Safety Cabinet

1. Manufacturer shall provide a certified copy of the personnel, product and cross-contamination (biological) tests, equivalent to or more demanding than as specified in NSF International Standard #49, performed on the unit selected from the corresponding statistical sample. Tests may be witnessed by a representative of the purchaser.
2. Cabinet shall have momentum air curtain downflow velocity profile, i.e., a higher velocity of downflow behind the viewscreen relative to downflow velocity over the work surface.
3. High velocity return air slots shall be located at each end of the front access opening. These slots help to prevent contaminated air from being drawn into the work area along the edges of the side wall and from escaping the work area to the ambient environment.
4. The sliding viewscreen shall be slanted at an angle of 10° from vertical, capable of moving to a fully closed position during shutdown periods.
5. Viewcreen shall be constructed of 1/4" safety plate glass, with a maximum opening of 19 3/4" for equipment loading.
6. All biologically contaminated ducts, plenums and work area side walls shall be permanent metal construction and maintained under negative pressure or enclosed within a negative pressure zone.
7. Capable of automatically handling a 250 percent increase in pressure drop across filter with not more than 10 percent reduction in total air delivery. The motor blower combination continually regulates the air volume to the end of the useful life of the filter. Test data to verify these capabilities shall be available upon request.
8. Interior work area shall be 27 1/2" high.
9. Cabinet shall have The Baker Company’s exclusive UniPressure Preflow Plenum, designed to provide more uniform airflow to the supply filter.
10. Supply and exhaust filters shall be front-loading.
11. A telescoping plenum assembly shall be provided to allow the filters to be directly clamped to the plenum against a closed-cell neoprene gasket. Plenum applies force to full perimeter of filters, rather than point force.
12. Complete unit shall be listed as certified by Underwriters Laboratory (cULus) for electrical, fire and personal safety.
13. Sliding sash high velocity air return slots shall be provided along the entire top of the work area to prevent migration of contaminated air behind the glass viewscreen.
14. Cabinet shall have a microprocessor-based control system with a membrane control panel mounted on the front of the cabinet facing down towards the user when sitting at the unit.
15. Unit shall have an audible alarm and a flashing LED to indicate when the sliding viewscreen is in an unsafe position. An alarm mute switch shall be provided on the front-mounted cabinet control panel to allow the operator to mute the alarm tone for brief adjustments. The alarm shall automatically reactivate after five minutes if the viewscreen remains in an unsafe position.
16. Intake velocity through the 8", 10", or 12" front access opening shall be minimum of 100 FPM.
17. Cabinet exterior construction:
a. seal panels of 16-gauge cold-rolled steel
b. dress panels of 16-gauge cold-rolled steel, baked enamel finish, painted PermaWhite™.
18. Cabinet interior (work area) construction: one-piece 16-gauge, Type 304 stainless steel, with a smooth, 7/16" radius between rear and side walls, and easily cleanable, radiused corners on the work surface tray.
19. Work area side walls and rear wall to be one-piece construction. A straight back wall shall be provided to maximize work area and easily accommodate laboratory equipment.
20. Work area shall be provided with two GFI protected duplex outlets with drip-proof covers and shall be protected by a self-resetting circuit breaker.
21. Lower front work area airfoil shall be provided to improve access opening containment capability.
22. Cabinet shall have a unitized drain pan with 7/16" radius on all sides and a fully-removable work surface and work surface supports to facilitate cleaning.
23. Stainless steel air diffuser and filter protector provided in work area.
24. Unit must be listed by NSF International as meeting Standard #49.
25. Each unit, before shipping, shall have a complete physical test to assure cabinet meets Class II requirements. A copy of this test will be provided with the unit.
26. Speed controller shall automatically compensate for normal voltage fluctuations maintain stable voltage to the motor while allowing for manual adjustments for filter loading.
27. Adjustable internal damper provided to compensate for changing resistance of exhaust and supply filters.
28. A single power cord and plug shall be provided for electrical power source.
29. One petcock and one plugged penetration are provided as standard on the right side wall. Left side wall is prepunched for optional/additional plumbing connections.
30. All external plumbing connections to the petcocks shall be made through the bottom of the cabinet and not the sides, allowing zero clearance between the unit and the building walls or equipment to its right and left.
31. The unit shall have standard HEPA filters for a protection effectiveness of 99.99% when filtering particles of 0.3 micron size.
32. The unit shall have (optional) ultraviolet light with a shutoff safety feature when the viewscreen is raised.
33. The unit shall have electronic ballasts for UV and fluorescent lighting to provide longer life and lower heat output.
34. The unit is available with an optional stand, which includes telescoping legs that allow the work surface height to be set from 30 1/8" to 38 5/8".

Warranty
The Baker Company, Inc., expressly represents and warrants all goods (a) to be as specified (and described) in The Baker Company catalogs and literature, and (b) to be free under normal use, service and testing (all as described in The Baker Company catalogs and literature) from defects in material and workmanship for a period of thirty-six months from the invoice date.

The exclusive remedy for any breach or violation of this warranty is as follows: The Baker Company, Inc., will F.O.B. Sanford, Maine, furnish without charge repairs to or replacement of the parts or equipment which proved defective in material or workmanship. No claim may be made for any incidental or consequential damages.

THIS WARRANTY IS EXPRESSLY IN LIEU OF ALL OTHER WARRANTIES, EXPRESSED OR IMPLIED, INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE UNLESS OTHERWISE AGREED IN WRITING SIGNED BY THE BAKER COMPANY. (THE BAKER COMPANY SHALL NOT BE RESPONSIBLE FOR ANY IMPROPER USE, INSTALLATION, SERVICE OR TESTING OF THE GOODS.)