Envirco MAC 10 Original Series Instruction manual

ENVIRCO Technical Support: 800-884-0002
MAC 10®Original
Fan Filter Unit
Standard, RSR, & RSRE Models
INSTALLATION, OPERATION & MAINTENANCE MANUAL

MAC 10®Original
Fan Filter Unit
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Installation, Operation, & Maintenance Manual
Table of Contents
Critical Operations of the MAC 10® Original ..................................................................... 3
Part Numbers ................................................................................................................... 3
Warnings .......................................................................................................................... 4
Installation ........................................................................................................................ 5
Unit Control Box ............................................................................................................... 6
Cleaning the MAC 10 Prelter.......................................................................................... 7
Service: Removal and Replacement of Standard Filters.................................................. 8
Service: Removal and Replacement of RSR/E Filters (Extrusion Housing)..................... 9
Service: Removal and Replacement of RSR/E Filters (Sheet Metal Housing)................ 10
Service: Standard and RSR Motor Removal and Installation...........................................11
Service: RSRE Motor Removal and Installation.............................................................. 12
Troubleshooting............................................................................................................... 13
MAC 10 Original Wiring Diagrams................................................................................... 14
MAC 10 Original Replacement Parts List........................................................................ 15
Limited Warranty ............................................................................................................. 16
Testing ............................................................................................................................. 17

MAC 10®Original
Fan Filter Unit
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Installation, Operation, & Maintenance Manual
■Critical Operation Conditions of the MAC 10 Original
1. Touching of the HEPA lter will damage it, voiding the warranty on the lter. The screen is only to protect against an
accidental ‘touch’ of the lter. Never place a hand or tool on the lter. Never lie lter face at down on a surface always
have lter on its side to protect from damage.
2. Prior to powering the unit, verify voltage on label and that the unit has been wired into the correct voltage. The serial
number label on the top of the MAC 10 unit has the required voltage.
3. To insure you order the proper replacement parts or complete MAC 10 unit, record the part number and serial number.
This information is located on the serial number label, located adjacent to the electrical box. If you can’t locate the Sales
Order Number, please contact ENVIRCO for this information. Once obtained, record the information for reference.
■Part Numbers Covered by this Manual
MAC 10 Original Standard P/N
2x4 11111-XXX
2x3.5 11112-XXX
2x3 11113-XXX
2x2 11114-XXX
MAC 10 Original RSR
Sheet Metal Housing P/N
2x4 11115-XXX
2x3.5 11116-XXX
2x3 11117-XXX
2x2 11118-XXX
MAC 10 Original RSR
Extrusion Housing P/N
2x4 11157-XXX
2x3.5 11171-XXX
2x3 11169-XXX
2x2 11170-XXX
Units come set in manual mode from
the factory. Please review installation
requirements and set up with your end
user (See page 8 for complete set up
instructions.)
A ‘Z’ in the part number indicates that the unit is special.
This may indicate a size change from standard or a
special lter. Please contact the factory for part numbers
if this is the situation.

MAC 10®Original
Fan Filter Unit
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Installation, Operation, & Maintenance Manual
■Warning
TO REDUCE THE RISK OF FIRE, ELECTRICAL SHOCK, OR INJURY TO PERSONS, OBSERVE THE FOLLOWING:
A. Installation work and electrical wiring must be done by qualied person(s) in accordance with all applicable codes and
standards, including re-rated construction.
B. When cutting or drilling into wall or ceiling, do not damage electrical wiring and other hidden utilities.
C. If this unit is to be installed over an area using liquid, such as water or chemical cleaning solutions, it must be marked as
appropriate for the application.
D. Use this unit only in the manner intended by the manufacturer. If you have any questions, contact the manufacturer.
E. Before servicing or cleaning the unit, switch power off at unit service panel and lock service panel to prevent power from
being switched on accidentally.
ENVIRCO USA
101 McNeill Road
Sanford, NC 27330
Tel: [phone]
Tel: [phone]
Fax: [phone]
Email: [email protected]

MAC 10®Original
Fan Filter Unit
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Installation, Operation, & Maintenance Manual
■Installation
Note: The MAC 10 Original Fan Filter Unit is completely assembled at the factory with the exception of the optional ¼” (0.64
cm)-20 eyebolts that are used when hanging the unit from an engineered support system.
Step 1. Carefully remove the unit from the shipping carton and inspect for any damage that may have occurred during
transportation. (See Figure 1.)
Recommendation:
Review mode settings
at this time as specied
for installation
(see page 7 for controls).
Figure 1: Unboxing
Step 2. If using rigidly supported grid (usually 2” (50 mm) or wider), raise unit through ceiling and lower onto the gasketed grid.
If using a exible grid (typically supported with wires), the unit must be secured to an engineered support system with s-hooks
and chain. Note: Special size units are available to t specic cleanroom grid systems.
Step 3. Have an electrician wire the unit to the appropriate voltage (115V, 220V, 277VAC), according to the wiring diagram in
section IX and local electric codes. If optional power cord was purchased, plug unit into a grounded receptacle.
Note: When ordering RSR and RSRE
units, the HEPA lters may be shipped
separately to be installed into units after
the fan box has been installed.
3 SPEED SWITCH
ELECTRICAL ENTRANCE
ON/OFF SWITCH
Figure 3 - Speed/Airflow Adjustment
LOW
MEDIUM HIGH

MAC 10®Original
Fan Filter Unit
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Installation, Operation, & Maintenance Manual
■Unit Control Box
ON/OFF Switch - Speed/Airow Adjustment
All MAC 10 units are equipped with a three-position rotary switch, which is located on
the side of the electrical box. (See Figure 2.)
Recommended fan speed during initial start-up and operation is the “LOW” speed. As airow eventually decreases due to lter
loading, fan speed may be increased by moving the rocker switch to the top or “MEDIUM” position, and nally to the “HIGH”
position. Periodic airow velocity readings (Per I.E.S. Specications) should be conducted to determine the lter condition
and appropriate fan speed setting.
Figure 2: 3 Speed Switch Adjustment
Optional Speed Control
Units furnished with the optional speed control (standard with 2x2 and 2x3 units) enable adjustment of airow at any setting
within the recommended performance range. The speed control knob is located on the side of the electrical box, adjacent to
the on/off switch.
Figure 3: Speed Control Adjustment
• Airow/speed is adjusted by rotating the knob (see Figure 3):
• Clockwise lowers the speed
• Counter-Clockwise increases the speed
• Fully rotating the speed control knob to the left or counter-clockwise will turn the unit off.
Note: When turning the unit “ON” from the “OFF” position of the speed control, the fan is at the highest speed. Turning the
speed control knob clockwise will lower the airow.
SPEED CONTROL
ELECTRICAL ENTRANCE
ON/OFF SWITCH
Figure 3 - Speed/Airflow Adjustment
3 SPEED SWITCH
ELECTRICAL ENTRANCE
ON/OFF SWITCH
Figure 3 - Speed/Airflow Adjustment
LOW
MEDIUM HIGH

MAC 10®Original
Fan Filter Unit
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Installation, Operation, & Maintenance Manual
■Cleaning the MAC 10 Prefilter
Tools Required: None
Note: To keep the lter in top operating condition, washing
the foam prelter is recommended every three to six months.
Step 1. To gain access to the prelter, remove the ceiling
panel next to the unit, if applicable.
Step 2. Switch the ON-OFF switch to the off position.
Step 3. Remove the prelter from the snap-in frame. (See Figure 4.)
Step 4. Clean the prelter by hand washing in water with a mild detergent or by using a vacuum cleaner. Allow prelter to
dry completely before replacing.
Step 5. Reassemble by reversing the above steps.
Figure 4: Prelter Cleaning
WARNING
DISCONNECT THE UNIT FROM THE ELECTRICAL
POWER SOURCE BEFORE ATTEMPTING
ANY SERVICE

MAC 10®Original
Fan Filter Unit
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Installation, Operation, & Maintenance Manual
■Service: Removal and Replacement of Standard HEPA/ULPA Filters
Note: All lters should be visually inspected for freight damage before installation. It is necessary to use two workers when
removing the lter and for installation to avoid twisting or separation of the media seals. Handle the lter only by the frame
and never place anything on the upstream lter side of the lter. Additionally, it is important to keep the lter level to prevent
any shearing force on the media itself.
For Standard Filters:
Tools Required: Phillips Head Driver, Battery Operated Drill with 5/32 drill bit, Rivet Hand Tool, Ø5/32 aluminum rivet grip
range .126-.187
Step 1. Remove unit from ceiling.
Step 2. Remove the 10 screws holding the HEPA/ULPA lter to the lid assembly.
Step 3. Lift the lid assembly off the HEPA/ULPA lter (see Figure). Remove Filter deectors using 5/32 drill bit. Keep lter
deectors to install in new lter. Discard the used lter as per requirements of the applicable regulations. Carefully install the
lter deectors into the new lter using the 5/32 rivets. Do not touch or place the lter deectors on the HEPA/ULPA media
pack. This could cause tears in the lter pack.
Step 4. Before replacing with the new lter, carefully inspect the new lter for any visible damage. Also inspect the gasket
and the T-Bar to insure a tight seal. Replace if necessary.
Step 5. To replace lter, raise the lter and rotate into position in the ceiling grid (with power off) , then lower the plenum
housing into place. Reconnect wiring and hardware from previous steps that have been removed.
Step 6. Restore power and verify proper operation of FFU.
Figure 5: Standard Filter Change
On/Off Switch
Lid Assembly
#8 Screws (10x)
Ø5/32 Rivet (6x)Filter Deflector
HEPA/ULPA Filter
WARNING
DISCONNECT THE UNIT FROM THE ELECTRICAL
POWER SOURCE BEFORE ATTEMPTING
ANY SERVICE
WARNING
THE STANDARD FILTER IS PROTECTED WITH AN
EXPANDED METAL FACE SCREEN. THIS IS
NEVER TO BE USED TO HANDLE THE FILTER.
IT IS ONLY FOR PROTECTION AGAINST AN
ACCIDENTAL TOUCH OF THE FILTER.
ONLY HANDLE THE FILTER BY THE FRAME.

MAC 10®Original
Fan Filter Unit
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Installation, Operation, & Maintenance Manual
Figure 6: RSR Extrusion Filter Replacement
WARNING
DISCONNECT THE UNIT FROM THE ELECTRICAL
POWER SOURCE BEFORE ATTEMPTING
ANY SERVICE
WARNING
THE STANDARD FILTER IS PROTECTED WITH AN
EXPANDED METAL FACE SCREEN. THIS IS
NEVER TO BE USED TO HANDLE THE FILTER.
IT IS ONLY FOR PROTECTION AGAINST AN
ACCIDENTAL TOUCH OF THE FILTER.
ONLY HANDLE THE FILTER BY THE FRAME.
■Service: Removal and Replacement of RSR/E Filters (Extrusion Housing)
Note: All lters should be visually inspected for freight damage before installation. It is necessary to use two workers when
removing the lter and for installation to avoid twisting or separation of the media seals. Handle the lter only by the frame
and never place anything on the upstream lter side of the lter. Additionally, it is important to keep the lter level to prevent
any shearing force on the media itself.
For RSR/E Filters:
Tools Required: 5/32” hex head wrench
Step 1. Remove the diffuser screen by removing the four M5x35 socket head screws securing the screen to the lter. (See
Figure 6.)
Step 2. Loosen the six M5x16 socket head screws far enough to rotate the lter clip 180°. The lter will not drop during this
operation. Using the clips as handles, slowly pull the lter away from the knife-edge seal. It is important to pull the lter slowly
away from the seal, so that the gel remains in the lter gel track.
Step 3. Inspect lter for visible damage, if damaged set aside for replacement or repair.
Step 4. Inspect the gel seal, if reinstalling the removed lter. Determine if the gel has lost its ability to seal, if so repair the gel.
Step 5. Place the lter against the lter-sealing surface of the RSR unit. Install lter clips and screws. The clips can be rotated
and angled into place. Using the clips as a lever the lter can be seated. It is recommended to work either clockwise or counter
clock wise around the lter, raise the lter into the gel.
Step 6. Reinstall screen.
Filter
Filter Clip
M5x16
Cap
Screw
M5x35
Cap
Screw
Knife- Edge
Seal
Gel Track
Perforated
Screen

MAC 10®Original
Fan Filter Unit
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Installation, Operation, & Maintenance Manual
■Service: Removal and Replacement of RSR/E Filters (Sheet Metal Housing)
Step 1. Remove the diffuser screen by shifting it to one side and lowering it out of the housing.
Step 2. Loosen the six M5x16 socket head screws far enough to rotate the lter clip 180°. The lter will not drop during this
operation. Using the clips as handles, slowly pull the lter away from the knife-edge seal. It is important to pull the lter slowly
away from the seal, so that the gel remains in the lter gel track.
Step 3. Inspect lter for visible damage, if damaged set aside for replacement or repair.
Step 4. Inspect the gel seal, if reinstalling the removed lter. Determine if the gel has lost its ability to seal, if so repair the gel.
Step 5. Place the lter against the lter-sealing surface of the RSR unit. Install lter clips and screws. The clips can be rotated
and angled into place. Using the clips as a lever the lter can be seated. It is recommended to work either clockwise or counter
clock wise around the lter, raise the lter into the gel.
Step 6. Reinstall screen.
WARNING
DISCONNECT THE UNIT FROM THE ELECTRICAL
POWER SOURCE BEFORE ATTEMPTING
ANY SERVICE
WARNING
THE RSR FILTER IS PROTECTED WITH AN EXPANDED
METAL FACE SCREEN. THIS IS NEVER TO BE
USED TO HANDLE THE FILTER. IT IS ONLY FOR
PROTECTION AGAINST AN ACCIDENTIAL TOUCH OF
THE FILTER. ONLY HANDLE FILTER BY THE FRAME.
Filter
Filter Clip
¼ -20
Cap
Screw
10-32
PHP
Screws
Knife- Edge
Seal
Gel Track
Diffuser
Screen
Figure 7: RSR Sheet Metal Filter Replacement

MAC 10®Original
Fan Filter Unit
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MAC 10 IQ VE5 SERVICE MANUAL
PAGE 13
Figure 6 – Motor Replacement
Blower Wheel
Venturi Ring
Motor
Prefilter
ON/OFF Switch
Power Entrance
■Service: Standard and RSR Motor Removal and Installation
Tools Required: Phillips head screwdriver, 3/8 (10 mm) hex head wrench, pliers, 5/32” (0.40 cm) Allen wrench
Step 1. To gain access to the motor, remove the ceiling panel next to the unit, if applicable.
Step 2. Switch the ON-OFF switch to the off position.
Step 3. Remove the prelter off the prelter frame.
Step 4. Loosen the electrical box cover screws (2), and slide/lift off cover.
Step 5. Make note of all wire locations for reinstallation later.
Step 6. Disconnect the two brown wires from the capacitor, using a pair of pliers.
Step 7. Disconnect the motor wiring from the rotary switch and rocker switch or speed control and rocker switch and remove
the grommet from the motor leads. Save this grommet for reinstallation.
Step 8. Remove the six screws to free the venturi ring and remove the motor/blower assembly from the lid assembly. If using
power drivers, set the unit to a low torque setting to avoid stripping the sheet metal screws. (See Figure 8.)
Step 9. Using a 5/32”(0.40 cm) Allen wrench remove the blower wheel from the motor shaft. Remove motor from the venturi
ring using a hex wrench.
Step 10. Replace with the new motor and reassemble by reversing the above steps. Set the spacing between the venturi ring
and the blower wheel at 0.06”(0.15 cm) clearance.
WARNING
DISCONNECT THE UNIT FROM THE ELECTRICAL
POWER SOURCE BEFORE ATTEMPTING
ANY SERVICE
WARNING
ELECTRICAL SERVICE SHOULD ONLY
BE PERFORMED BY A LICENSED
OR QUALIFIED ELECTRICIAN.
Figure 8: Standard/RSR Motor Replacement

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■Service: RSRE Motor Removal and Installation
Step 1. To gain access to the motor, remove the gel seal lter.
Step 2. While supporting the bafe assembly from below, remove the four corner screws on the bafe assembly and lower
the assembly. (See Figure 9.)
Step 3. Prior to removing motor/blower assembly, remove electrical box cover (located underneath the lid panel) to expose
motor connectors. Disconnect the nine pin connector from it’s mate in the prelter bracket.
Step 4. While supporting the motor/blower assembly from below, remove the six machine screws that secure the venturi ring
to the bottom face of the lid.
Step 5. Using a 5/32”(0.40 cm) Allen wrench, remove the blower wheel from the motor shaft. Remove motor from the venturi
ring by removing the three # 10 bolts.
Step 6. Before removal of the motor mount bracket, measure the precise location of the bracket on the motor. Remove the
bracket.
Step 7. Replace with the new motor and reassemble by reversing the above steps. Set the location of the motor mount bracket
as measured (see above Step 6). Set the spacing between the venturi ring and the blower wheel at 0.06”(0.15 cm) clearance.
When reinstalling the motor plate, align the plate to insure that the leads will reach the electrical box.
WARNING
DISCONNECT THE UNIT FROM THE ELECTRICAL
POWER SOURCE BEFORE ATTEMPTING
ANY SERVICE
WARNING
ELECTRICAL SERVICE SHOULD ONLY
BE PERFORMED BY A LICENSED
OR QUALIFIED ELECTRICIAN.
Electrical connectors
located in inner
prefilter wall
Plenum
Gel Seal Filter
Motor/Blower
Assy
Blower
Wheel
Venturi
Ring
Motor
Machine Screw
and washer
Grommet
Wellnut
Screen
Figure 9: RSRE Motor Replacement

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Fan Filter Unit
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Installation, Operation, & Maintenance Manual
■Troubleshooting
LOW AIR VELOCITY
Step 1. Check prelter media; replace or clean as necessary.
Step 2. Flip switch from “Low” to “Medium” or “Medium” to “High” on units with 3-speed switch.
Step 3. Adjust variable speed control (only units with optional Speed Control) for higher blower output.
Step 4. Check power supply for proper voltage, amperage and distribution frequency.
Step 5. Replace HEPA/ULPA lter if the air velocity remains low.
HIGH AIR VELOCITY
Step 1. Flip switch from “HIGH” to “MEDUIM” to “LOW” on units with 3-speed switch.
Step 2. Adjust variable speed control (only units with optional Speed Control) for lower blower output.
NON-LAMINAR FLOW AND/OR EXCESSIVE CONTAMINATION
Step 1. Ensure that no large obstructions are upstream of airow pattern.
Step 2. Determine that no other air-moving devices are operating in or around cleanroom which disrupt room’s airow pattern.
Step 3. Check air velocity and, if low, conduct the “Low Air Velocity” procedure outlined above.
Step 4. Conduct smoke and photometer test on HEPA lter. Seal or replace HEPA lter as necessary.
Contact Technical Support at:
ENVIRCO
101 McNeill Road
Sanford, NC 27330, USA
Tel: [phone]
Fax: [phone]
Email: [email protected]

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■Wiring Diagrams
Figure 10: Wiring Diagram 3-Speed
Figure 11: Wiring Diagram Speed Control

MAC 10®Original
Fan Filter Unit
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■MAC 10 Original Replacement Parts List
ENVIRCO Part Number
Description Qty. per Unit 115V / 60 Hz 208-240V / 50-60 Hz 277V / 60 Hz
Prelter 1 62981-001 62981-001 62981-001
Motor 1 63764-001 63764-002 63764-003
ON/OFF Switch 1 61485 61485 61485
Speed Control (Optional) 1 63011 63015
63742 (CE Marked)
63016
Pressure Switch (Optional) 1 63415 63415 63415
Transformer (Optional) 1 63667 63666 63665
Current Sensor (Optional) 1 24235-001 24235-001 24235-001
Power Cord (Optional) 1 63042-001 63042-004 63042-013
Standard Filter1Qty. per Unit HEPA ULPA (Optional) Actual Filter Dimensions
2x2 1 69514-004 69514-018 23.63 x 23.63 x 9.125
2x3 1 69514-019 64514-012 23.63 x 35.63 x 9.125
2x3.5 1 64514-020 64514-021 23.63 x 41.63 x 9.125
2x4 1 69514-006 69514-007 23.63 x 47.63 x 9.125
RSR Filter - Extrusion Housing1Qty. per Unit HEPA ULPA (Optional) Actual Filter Dimensions
2x2 1 69563-005 69563-004 22.00 x 22.00 x 3.63
2x3 1 69563-006 69563-007 22.00 x 34.00 x 3.63
2x3.5 1 69563-008 69563-009 22.00 x 40.00 x 3.63
2x4 1 69563-001 69563-003 22.00 x 46.00 x 3.63
RSR Filter - Sheet Metal Housing1Qty. per Unit HEPA ULPA (Optional) Actual Filter Dimensions
2x2 1 93997-005 93997-004 21.00 x 21.00 x 3.55
2x3 1 93997-006 93997-007 21.00 x 33.00 x 3.55
2x3.5 1 93997-008 93997-009 21.00 x 39.00 x 3.55
2x4 1 93997-001 93997-003 21.00 x 45.00 x 4.55
1 All lter part numbers are based on the standard MAC 10 sizes (2x4 - 23.63 x 47.63; 2x3.5 - 23.63 x 35.63; 2x3 - 23.63 x 35.63; 2x2 - 23.63 x
23.63). If the unit in question is not this size or if the part number includes a “Z”, contact the factory for replacement lter information.
Optional Accessories
• Fluorescent lighting
• Ionizing bar
• Solid-state speed control on 2x4 and 2x3.5 units (standard on all other sizes)
• 12” (30.48 cm) diameter A/C intake collar
• Gasket Seal Filter (RSR unit only)
• ULPA Filter (Standard and RSR)

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■Limited Warranty
LIMITED WARRANTY: Unless otherwise expressly stated in ENVIRCO’s published specifications for the Goods, ENVIRCO
warrants that Goods are free from defects in material and workmanship, except for services which are warranted to be
performed in a competent and diligent manner in accordance with any mutually agreed specifications. The foregoing warranty
shall apply for eighteen (18) months from the date of shipment from ENVIRCO’s facility, except for services for which the
warranty shall apply for ninety (90) days from the date of performance (the “Warranty Period”). Provided Buyer informs
ENVIRCO in writing of any breach of warranty prior to the expiration of the applicable Warranty Period, ENVIRCO shall,
as its sole obligation and Buyer’s sole and exclusive remedy for any breach of this warranty, repair or replace/re-perform
the Goods which gave rise to the breach or, at ENVIRCO’ option, refund the amounts paid by Buyer for the Goods which
gave rise to the breach. Any repair, replacement or re-performance by ENVIRCO hereunder shall not extend the applicable
Warranty Period. The parties shall mutually agree on the specifications of any test to determine the presence of a defect.
Unless otherwise agreed upon by ENVIRCO in writing, Buyer shall bear the costs of access, de-installation, re-installation and
transportation of Goods to ENVIRCO and back to Buyer. These warranties and remedies are conditioned upon (a) the proper
storage, installation, operation, and maintenance of the Goods and conformance with the proper operation instruction manuals
provided by ENVIRCO or its suppliers or subcontractors, (b) Buyer keeping proper records of operation and maintenance
during the applicable Warranty Period and providing ENVIRCO access to those records, and (c) modification or repair of the
Goods only as authorized by ENVIRCO. ENVIRCO does not warrant the Goods or any repaired or replacement parts against
normal wear and tear or damage caused by misuse, accident, or use against the instructions of ENVIRCO. Any modification or
repair of any of the Goods not authorized by ENVIRCO shall render the warranty null and void. EXCEPT AS EXPRESSLY SET
FORTH HEREIN, ENVIRCO MAKES NO OTHER WARRANTIES, EXPRESS OR IMPLIED, INCLUDING, BUT NOT LIMITED
TO, ANY IMPLIED WARRANTIES OF MERCHANTABILITY, NON-INFRINGEMENT OR FITNESS FOR A PARTICULAR
PURPOSE WHICH ARE HEREBY DISCLAIMED TO THE EXTENT PERMITTED BY APPLICABLE LAW.

MAC 10®Original
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■Testing
Each MAC 10 Original lter unit is thoroughly tested at the factory before shipment. However, because of the “rigors” of
shipping, ENVIRCO encourages its re-test after installation. ENVIRCO recommends that the customer contact an independent
organization, with technicians trained and experienced in performance evaluation and maintenance of clean air equipment.
Some of the testing procedures performed on the MAC 10 VE5 include PSL challenge of HEPA/ULPA lters to assure specied
performance, along with air velocity measurement and adjustment tests. No DOP is used on MAC 10 Filters, unless requested.
Recommended Testing
All units that are airow tested at Envirco are tested using a Shortridge Airdata Multimeter 800 series with a Velgrid head. The
recommended method of reading is to place one corner of the Velgrid head 1-1/4” from the corner of the lter face and then
take four reading evenly spaced along the four foot side, then repeat these reads for the other long side. This gives a total of
eight reading to test the unit. All advertised data is based on using the Velgrid with eight readings (128 velocity points). Envirco
recognized using eight reading during a cleanroom start-up may be time consuming and recommends using three Velgrid
readings taken on a diagonal, as shown below.
Figure 12: Velgrid Testing
Recommended Testing, 8 Readings with a Velgrid (Left) and Factory Approved Testing, 3 Readings with a Velgrid (Right)

ENVIRCO MAC 10 and VE5 are registered trademarks of ENVIRCO, USA. Specications subject to modications or changes without notice. US patents 4,560,395 and 5,470,363. Other patents issued and pending in
foreign countries. Special thanks to Connect2Cleanrooms for cleanroom photography.
Form P/N#: 268570 Rev. 07/18
Copyright © 2018 ENVIRCO. All Rights Reserved.
Industrial
Cleanroom Products
»MAC 10®Original
»MAC 10®IQ™
»MAC 10®IQ™ LAF
»MAC 10®LEAC™
»MAC 10®LEAC2™
»MAC 10®LEDC™
»Ducted Ceiling Module:
DCM & RSR
»AC or DC Control Systems
»MAC-T Ceiling Grid System
Hospital & Healthcare
Hospital & Healthcare
»IsoClean®and IsoClean
with Ultraviolet Light
»AirCeil®
»Hospi-Gard®Room
Pressure Monitor
Enviramedic Products
»HOR Horizontal Flow
Enclosure
»HCF Horizontal Flow
Surgery Room
»VOR Vertical Flow Surgery
Isolator
Pharmaceutical
Pharmaceutical &
Medical Device
»Unimodule M2 Vertical
Laminar Flow Workstation
»METD 100% Exhausted
Vertical Flow Workstation
»Laminar Downow Module
Laboratory & Research
Laboratory & Research
»100-Plus Horizontal or
Vertical Flow Clean Bench
»Unidirectional Flow
Horizontal Flow Bench (LF)
»TT Table Top Horizontal
Flow Clean Bench
»EnviraLab Sterility Module:
ESM
Clean air solutions built for you.
MORE INFORMATION AVAILABLE AT WWW.ENVIRCO.COM
ENVIRCO®
101 McNeill Road | Sanford, NC 27330, USA
tel: [phone] | toll free: 800.884.0002 | fax: [phone]
www.envirco.com | email: [email protected]