Gemini: Centrifugal Ceiling-Wall Cabinet Fan
Loren Cook Gemini fans provide maximum performance, durability, and ease of installation in a wide variety of ceiling and inline clean air exhaust applications.Gemini fans are easily field convertible from ceiling to inline or inline to ceiling depending on the installation needs. All units are tested in COOK's AMCA registered laboratory in accordance with AMCA Standards and are licensed to bear the AMCA Certified Ratings Seal. All Gemini units are listed by Underwriters Laboratory (UL 705) and UL listed for Canada (cUL 705). For optional UL listings, refer to page 10 of this catalog.
- Gemini Catalog
- Gemini Manual
- Gemini Ceiling and Cabinet Fans
- Gemini Supplement Curtain Style Ceiling Radiation Dampers
- Gemini Supplement Ceiling to Inline Conversion Kit
- Gemini Supplement Inline to Ceiling Conversion Kit
- Gemini Isolator Kit Ceiling and Cabinet Fans Supplement
- Gemini Supplement Gemini 100 Series UL 507 IOM
- Gemini Supplement Gemini wMotion Sensor
- UL (Power Ventilator for Smoke Control) brochure
- UL 762(Restaurant) brochure
See the Downloads tab for Specifications, Submittals, and FanDrafter files
See also DB Duct Blowers / Cabinet Fans
See also CBF Cinder Block
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GC 122-184
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GC 220-960
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GC 1000-2000
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GN 122-184
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GN 220-960
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GN 1000-2000
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Options & Accessories
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Installation
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Downloads
LOREN COOK COMPANY certifies that the Gemini GC 122-184 are licensed to bear the AMCA Seal. The ratings shown are based on tests and procedures performed in accordance with AMCA Publication 211 and AMCA Publication 311, and comply with requirements of the AMCA Certified Ratings Program.
Type Gemini GC 122-184 are furnished standard with UL 705 & cUL 705 listing (Power Ventilator/ZACT).
All sizes are available with express service. Read more.
Gemini GC 122-184
Ceiling Fans
- Performance ranges from 50 to 250 CFM
- SP: 0 - .875 in
- Eight different performance ranges are available using four different two-speed motors all in one fan size.
- Fans sized to exceed mechanical code applications of 75 CFM per water closet in small public washrooms.
Description: Fan shall be ceiling mounted, direct driven, centrifugal exhaust fan.
Certifications: Fan shall be manufactured by an ISO 9001 certified company. Fan shall be listed by Underwriters Laboratories (UL 705) and UL listed for Canada (cUL 705) or UL Laboratories (UL 507) and UL listed for Canada (cUL 507). Fan shall bear the AMCA Certified Ratings Seal for sound and air performance.
Construction: Fan wheel housing and integral outlet duct collar shall be injection molded from a specially engineered resin exceeding UL requirements for smoke and heat generation. The outlet duct shall have provision for an aluminum backdraft damper with continuous aluminum hinge rod. The inlet box shall be minimum 22 gauge galvanized steel. Motor shall be isolation mounted to a one piece galvanized stamped steel integral motor mount/inlet. A field wiring compartment with disconnect receptacle shall be standard. To accommodate different ceiling thickness, an adjustable prepunched mounting bracket shall be provided. A white, non-yellowing, high impact styrene injection molded grille shall be provided as standard. Unit shall be designed with provision for field conversion from ceiling to inline. Unit shall be shipped in ISTA Certified Transit Tested Packaging.
Wheel: Wheel shall be centrifugal forward curved type, injection molded of polypropylene resin. Wheel shall be balanced in accordance with AMCA Standard 204-05, Balance Quality and Vibration Levels for Fans.
Motor: Motor shall be open drip proof type with permanently lubricated sealed bearings and include impedance or thermal overload protection and disconnect plug. Motor shall be furnished at the specified voltage.
Product: Fan shall be model Gemini GC 122-184 as manufactured by LOREN COOK COMPANY of Springfield, Missouri.
Dimensions (inches)
| Grille Material | A |
|---|---|
| Plastic | 13-1/4 |
| Steel | 13-1/2 |
| Aluminum | 13-3/4 |
| Unit Size | Approx. Ship-Wt. Lbs. |
|---|---|
| 122/124 | 13 |
| 142/144 | 15 |
| 162/164 | 15 |
| 182/184 | 16 |

GC 220 - 740

GC 822 - 960
LOREN COOK COMPANY certifies that the Gemini GC 220-960 are licensed to bear the AMCA Seal. The ratings shown are based on tests and procedures performed in accordance with AMCA Publication 211 and AMCA Publication 311, and comply with requirements of the AMCA Certified Ratings Program.
Type Gemini GC 220-960 are furnished standard with UL 705 & cUL 705 listing (Power Ventilator/ZACT).
All sizes are available with express service. Read more.
Gemini GC 220-960
Ceiling Fans
- 200-700
- Performance ranges from 75 to 850 CFM
- SP: 0 to 7/8 inches.
- The Gemini 200-700 series fans are single scroll fans.
- 800-900
- Performance ranges from 680 to 1800 CFM
- SP: 0 to 5/8 inches.
- The Gemini 800-900 series fans are double scroll fans.
Description: Fan shall be ceiling, wall, or inline mounted, direct drive, centrifugal exhaust fan.
Certifications: Fan shall be manufactured by an ISO 9001 certified company. Fan shall be listed by Underwriters Laboratories (UL 705) and UL listed for Canada (cUL 705). Fan shall bear the AMCA Certified Ratings Seal for sound and air performance.
Construction: Fan housing shall be minimum 20 gauge galvanized steel and acoustically insulated. Blower and motor assembly shall be mounted to a minimum 14 gauge reinforcing channel and shall be easily removable from the housing. Motor shall be mounted on vibration isolators. Unit shall be supplied with integral wiring box and disconnect receptacle shall be standard. Discharge position shall be convertible from right angle to straight through by moving interchangeable panels. The outlet duct collar shall include a reinforced aluminum damper with continuous aluminum hinge rod and nylon bushings. To accommodate different ceiling thickness, an adjustable prepunched mounting bracket shall be provided. A white, non-yellowing, high impact styrene injection molded grille shall be provided as standard on 200 and 300 series. A powder painted white steel grille shall be provided as standard on 800-900 series. Unit shall be shipped in ISTA Certified Transit Tested Packaging.
Wheel: Wheel shall be centrifugal forward curved type, constructed of galvanized steel. Wheel shall be balanced in accordance with AMCA Standard 204-05, Balance Quality and Vibration Levels for Fans.
Motor: Motor shall be open drip proof type with permanently lubricated sealed bearings, built-in thermal overload protection and disconnect plug. Motor shall be furnished at the specified voltage.
Product: Fan shall be model Gemini GC 220-960 as manufactured by LOREN COOK COMPANY of Springfield, Missouri.
Dimensions (inches)

| Model | Housing | Outlet | Plastic Grille | Steel Grille | Deluxe Aluminum Grille | Approx. Ship-Wt. Lbs. | ||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| L | W | H | A | B | J | K | J | K | J | K | ||
| 220, 240 | 12-3/08 | 9/3/04 | 9-3/04 | 8 | 6 | 15-1/2 | 13-1/4 | 16-3/8 | 13-5/8 | 14-1/4 | 11 | 22 |
| 320, 340 | 12-3/08 | 10-3/04 | 10-3/04 | 8 | 6 | 14-1/4 | 12-1/04 | 25 | ||||
| 420 | 17 | 11-7/08 | 11-7/08 | 8 | 6 | - | - | 21 | 14-1/4 | 18-3/4 | 13-3/4 | 30 |
| 520 | 17 | 11-7/08 | 11-7/08 | 8 | 6 | 21 | 14-1/4 | 18-3/4 | 13-3/4 | 32 | ||
| 620, 640 | 17 | 11-7/08 | 11-7/08 | 10-1/02 | 4-3/04 | 21 | 14-1/4 | 18-3/4 | 13-3/4 | 35 | ||
| 720, 740 | 17 | 11-7/08 | 11-7/08 | 10-1/02 | 4-3/04 | 21 | 14-1/4 | 18-3/4 | 13-3/4 | 36 | ||
| 822, 842, 862 | 27 | 14-11/16 | 14-11/16 | 20 | 6 | 31-3/8 | 17-1/8 | 28-3/4 | 16-1/4 | 74 | ||
| 920, 940, 960 | 31 | 14-11/16 | 14-11/16 | 24-1/4 | 6 | 35-1/8 | 17-1/8 | 32-3/4 | 16-1/4 | 86 | ||

LOREN COOK COMPANY certifies that the Gemini 1000 and 2000 series are licensed to bear the AMCA Seal. The ratings shown are based on tests and procedures performed in accordance with AMCA Publication 211 and comply with the requirements of the AMCA Certified Ratings Program.
Type Gemini GC 1000 and 2000 are furnished standard with UL 705 & cUL 705 listing (Power Ventilator/ZACT).
All sizes are available with express service. Read more.
Gemini GC 1000-2000
Ceiling Fans
- Performance ranges from 1030 to 3470 CFM
- SP: 1/10 to 7/8 inches.
- The Gemini 1000-2000 series fans are double scroll fans.
- Motors are single speed.
- Motors available in single or three phase.
Description: Fan shall be ceiling, wall, or inline mounted, direct drive, centrifugal exhaust fan.
Certifications: Fan shall be manufactured by an ISO 9001 certified company. Fan shall be listed by Underwriters Laboratories (UL 705) and UL listed for Canada (cUL 705). Fan shall bear the AMCA Certified Ratings Seal for air performance.
Construction: Fan housing shall be minimum 20 gauge galvanized steel and acoustically insulated. Blower and motor assembly shall be mounted to a minimum 14 gauge reinforcing channel. Motor shall be resiliently mounted. Unit shall be supplied with integral wiring box. Discharge position shall be convertible from right angle to straight through by moving interchangeable panels. The outlet duct collar shall include reinforced aluminum dampers with continuous aluminum hinge rods and nylon bushings. To accommodate different ceiling thickness, an adjustable pre-punched mounting bracket shall be provided. A powder painted white steel grille shall be provided as standard. Unit shall be shipped in ISTA Certified Transit Tested Packaging.
Wheel: Wheels shall be twin DWDI centrifugal forward curved type, constructed of galvanized steel. Wheel shall be balanced in accordance with AMCA Standard 204-05, Balance Quality and Vibration Levels for Fans.
Motor: Motor shall be totally enclosed type with permanently lubricated sealed bearings and built-in thermal overload protection. Motor shall be furnished at the specified voltage and phase.
Product: Fan shall be model GC 1000 and GC 2000 as manufactured by LOREN COOK COMPANY of Springfield, Missouri.
Dimensions (inches)

| Model | Housing | Outlet | Steel Grille | Deluxe Aluminum Grille | Approx. Ship-Wt. Lbs | |||||
|---|---|---|---|---|---|---|---|---|---|---|
| L | W | H | A | B | J | K | J | K | ||
| 1000 | 38-1/8 | 15-1/4 | 15-1/4 | 33-11/16 | 7-11/16 | 42-3/8 | 17-1/8 | 38-3/4 | 15-3/4 | 125 |
| 2000 | 45-7/16 | 16-5/8 | 16-5/8 | 41-1/8 | 9-5/08 | 49-1/2 | 18-1/2 | 45-3/4 | 17-1/4 | 165 |
LOREN COOK COMPANY certifies that the Gemini GN 122-184 are licensed to bear the AMCA Seal. The ratings shown are based on tests and procedures performed in accordance with AMCA Publication 211 and AMCA Publication 311, and comply with requirements of the AMCA Certified Ratings Program.
Type Gemini GN 122-184 are furnished standard with UL 705 & cUL 705 listing (Power Ventilator/ZACT).
All sizes are available with express service. Read more.
Gemini GN 122-184
Inline Fans
- Performance ranges from 50 to 250 CFM,
- SP: 0 - .875 in
- Eight different performance ranges are available using four different two-speed motors all in one fan size.
- Fans sized to exceed mechanical code applications of 75 CFM per water closet in small public washrooms.
Description: Fan shall be inline mounted, direct drive, centrifugal exhaust fan.
Certifications: Fan shall be manufactured by an ISO 9001 certified company. Fan shall be listed by Underwriters Laboratories (UL 705) and UL listed for Canada (cUL 705). Fan shall bear the AMCA Certified Ratings Seal for sound and air performance.
Construction: Fan wheel housing and integral outlet duct collar shall be injection molded from a specially engineered resin exceeding UL requirements for smoke and heat generation. The outlet duct shall have provision for an aluminum backdraft damper with continuous aluminum hinge rod. The inlet box shall be minimum 22 gauge galvanized steel. Motor shall be isolation mounted to a one piece galvanized stamped steel integral motor mount/inlet. A field wiring compartment with disconnect receptacle shall be standard. To accommodate different mounting positions, an adjustable prepunched mounting bracket shall be provided. Unit shall be shipped in ISTA Certified Transit Tested Packaging.
Wheel: Wheel shall be centrifugal forward curved type, injection molded of polypropylene resin. Wheel shall be balanced in accordance with AMCA Standard 204-05, Balance Quality and Vibration Levels for Fans.
Motor: Motor shall be open drip proof type with permanently lubricated sealed bearings and include impedance or thermal overload protection and disconnect plug. Motor shall be furnished at the specified voltage and phase.
Product: Fan shall be model Gemini GN 122-184 as manufactured by LOREN COOK COMPANY of Springfield, Missouri.
Dimensions (inches)

| Model GN | Approx. Ship-Wt. Lbs. |
|---|---|
| GN-122/GN-124 | 15 |
| GN-142/GN-144 | 15 |
| GN-162/GN-164 | 16 |
| GN-182/GN-184 | 16 |

LOREN COOK COMPANY certifies that the Gemini GC 220-960 are licensed to bear the AMCA Seal. The ratings shown are based on tests and procedures performed in accordance with AMCA Publication 211 and AMCA Publication 311, and comply with requirements of the AMCA Certified Ratings Program.
Type Gemini GC 220-960 are furnished standard with UL 705 & cUL 705 listing (Power Ventilator/ZACT).
All sizes are available with express service. Read more.
Gemini GN 220-960
Inline Fans
- Performance ranges from 75 to 850 CFM
- SP: 0 - .875 in
- The Gemini 200-700 series fans are single scroll fans.
Description: Fan shall be ceiling, wall, or inline mounted, direct drive, centrifugal exhaust fan.
Certifications: Fan shall be manufactured by an ISO 9001 certified company. Fan shall be listed by Underwriters Laboratories (UL 705) and UL listed for Canada (cUL 705). Fan shall bear the AMCA Certified Ratings Seal for sound and air performance.
Construction: Fan housing shall be minimum 20 gauge galvanized steel and acoustically insulated. Blower and motor assembly shall be mounted to a minimum 14 gauge reinforcing channel and shall be easily removable from the housing. Motor shall be mounted on vibration isolators. Unit shall be supplied with integral wiring box and disconnect receptacle shall be standard. Discharge position shall be convertible from right angle to straight through by moving interchangeable panels. The outlet duct collar shall include a reinforced aluminum damper with continuous aluminum hinge rod and nylon bushings. To accommodate different ceiling thickness, an adjustable prepunched mounting bracket shall be provided. A white, non-yellowing, high impact styrene injection molded grille shall be provided as standard on 200 and 300 series. A powder painted white steel grille shall be provided as standard on 800-900 series. Unit shall be shipped in ISTA Certified Transit Tested Packaging.
Wheel: Wheel shall be centrifugal forward curved type, constructed of galvanized steel. Wheel shall be balanced in accordance with AMCA Standard 204-05, Balance Quality and Vibration Levels for Fans.
Motor: Motor shall be open drip proof type with permanently lubricated sealed bearings, built-in thermal overload protection and disconnect plug. Motor shall be furnished at the specified voltage.
Product: Fan shall be model Gemini GC 220-960 as manufactured by LOREN COOK COMPANY of Springfield, Missouri.
Dimensions (inches)

| Model | Housing | Outlet | Plastic Grille | Steel Grille | Deluxe Aluminum Grille | Approx. Ship-Wt. Lbs | ||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| L | W | H | A | B | J | K | J | K | J | K | ||
| 220, 240 | 12-3/08 | 9-3/04 | 9-3/04 | 8 | 6 | 15-1/2 | 13-1/4 | 16-3/8 | 13-5/8 | 14-1/4 | 11 | 22 |
| 320, 340 | 12-3/08 | 10-3/04 | 10-3/04 | 8 | 6 | 14-1/4 | 12-1/04 | 25 | ||||
| 420 | 17 | 11-7/08 | 11-7/08 | 8 | 6 | - | - | 21 | 14-1/4 | 18-3/4 | 13-3/4 | 30 |
| 520 | 17 | 11-7/08 | 11-7/08 | 8 | 6 | 21 | 14-1/4 | 18-3/4 | 13-3/4 | 32 | ||
| 620, 640 | 17 | 11-7/08 | 11-7/08 | 10-1/02 | 4-3/04 | 21 | 14-1/4 | 18-3/4 | 13-3/4 | 35 | ||
| 720, 740 | 17 | 11-7/08 | 11-7/08 | 10-1/02 | 4-3/04 | 21 | 14-1/4 | 18-3/4 | 13-3/4 | 36 | ||
| 822, 842, 862 | 27 | 14-11/16 | 14-11/16 | 20 | 6 | 31-3/8 | 17-1/8 | 28-3/4 | 16-1/4 | 74 | ||
| 920, 940, 960 | 31 | 14-11/16 | 14-11/16 | 24-1/4 | 6 | 35-1/8 | 17-1/8 | 32-3/4 | 16-1/4 | 86 | ||

LOREN COOK COMPANY certifies that the Gemini 1000 and 2000 series are licensed to bear the AMCA Seal. The ratings shown are based on tests and procedures performed in accordance with AMCA Publication 211 and comply with the requirements of the AMCA Certified Ratings Program.
Type Gemini GC 220-960 are furnished standard with UL 705 & cUL 705 listing (Power Ventilator/ZACT).
All sizes are available with express service. Read more.
Gemini GN 1000-2000
Inline Fans
- Performance ranges from 1030 to 3470 CFM
- SP 1/10 to 7/8 inches.
- The Gemini 1000-2000 series fans are double scroll fans.
- Motors are single speed.
- Motors available in single or three phase.
Description: Fan shall be ceiling, wall, or inline mounted, direct drive, centrifugal exhaust fan.
Certifications: Fan shall be manufactured by an ISO 9001 certified company. Fan shall be listed by Underwriters Laboratories (UL 705) and UL listed for Canada (cUL 705). Fan shall bear the AMCA Certified Ratings Seal for air performance.
Construction - Fan housing shall be minimum 20 gauge galvanized steel and acoustically insulated. Blower and motor assembly shall be mounted to a minimum 14 gauge reinforcing channel. Motor shall be resiliently mounted. Unit shall be supplied with integral wiring box. Discharge position shall be convertible from right angle to straight through by moving interchangeable panels. The outlet duct collar shall include reinforced aluminum dampers with continuous aluminum hinge rods and nylon bushings. To accommodate different ceiling thickness, an adjustable pre-punched mounting bracket shall be provided. A powder painted white steel grille shall be provided as standard. Unit shall be shipped in ISTA Certified Transit Tested Packaging.
Wheel: Wheels shall be twin DWDI centrifugal forward curved type, constructed of galvanized steel. Wheel shall be balanced in accordance with AMCA Standard 204-05, Balance Quality and Vibration Levels for Fans.
Motor: Motor shall be totally enclosed type with permanently lubricated sealed bearings and built-in thermal overload protection. Motor shall be furnished at the specified voltage and phase.
Product: Fan shall be model GC 1000 and GC 2000 as manufactured by LOREN COOK COMPANY of Springfield, Missouri.
Dimensions (inches)

| Model | Housing | Outlet | Steel Grille | Approx. Ship-Wt. Lbs | ||||
|---|---|---|---|---|---|---|---|---|
| L | W | H | A | B | J | K | ||
| GN-1000 | 38-1/8 | 15-1/4 | 15-1/4 | 33-11/16 | 7-11/16 | 42-3/8 | 17-1/8 | 125 |
| GN-2000 | 45-7/16 | 16-5/8 | 16-5/8 | 41-1/8 | 9-5/08 | 49-1/2 | 18-1/2 | 165 |
Fan Speed Control COOK's FSC is a variable speed controller which can offer excellent energy conservation and lower sound levels when 100 percent of a direct drive fan operating capacity is not required. The FSC employs solid state circuitry for long life and dependability. The FSC is available only on 115V and 230V shaded pole or permanent split capacitor direct drive motors and is not available on 1140 RPM and 1725 RPM motors. The FSC is normally shipped loose for field installation. Optional pre-wiring is available.
Motion Sensor The wall or ceiling mount passive infrared motion sensor will automatically turn on the fan when the room is occupied. Each of the sensors feature an adjustable time delay of 20 seconds to 30 minutes allowing the fan to continue to run after the room is no longer occupied up to the chosen setting. With this accessory, energy and air demands of the building will be reduced. The sensor must be installed in a 2x4 handy box and should be mounted within the line-of sight of the occupant. Maximum sensor coverage is 1200 square feet. Shipped loose for field installation.
Time Delay Switch The time delay switch operates both the fan and room light. Moving the switch to the "on" position turns the light & fan on immediately. Both light and fan stay on until the switch is moved to the "off" position. When the switch is moved to the "off" position, power to the light is immediately ceased and the fan will power down 1 to 60 minutes dependent upon the adjustable delay.
277 Volt Transformer The 277 Volt Transformer is available for the Gemini 220 - 960 series. This step-down transformer allows for the operation of a Gemini fan from a 277 volt source. It is shipped loose for field installation.
UL Listing Gemini 100 series is available with UL 507 listing (Electical Fans) and with cUL 507 listing for Canada. UL 507 units are suitable for use over tub and showers when installed in a GFCI protected branch circuit. Gemini 200 through 2000 series units are available with UL 1995 listing (Heating & Cooling Equipment) and cUL 1995 listing for Cananda. When a Gemini 200 - 2000 unit is supplying a separate modular cooling or heating source then UL 1995 listing may be required by local code.
Gemini Hanging Isolator Kit The Gemini Hanging Isolator Kit is used for Gemini ceiling and inline units 122 through 740. Bushings are made of resilient thermoplastic. The bushings and eyelets are sized to be used with common 1/4" x 20 all thread. Standard Gemini mounting brackets easily accommodate the isolator bushings. Flanged nuts eliminate the need for additional washers and provide for a more simplified field assembly. Rated Load 160 lbs
Rubber In Shear Isolator Rated Load 75 lbs
Spring Isolator - Ceiling Mounted Unit. Rated Load/Spring Rate 35 lbs/23 lbs. per in OR 70 lbs/51 lbs. per in

Deluxe Aluminum Grille LOREN COOK COMPANY offers aluminum grilles for Gemini fans in an attractive, architectural style. These grilles are available in painted white or aluminum finish. The deluxe aluminum grille is not available on GC-1000 or GC-2000 units.
Steel Grille A painted steel grille is available for the 100, 200, and 300 series fan whenever a steel grille is desired for cosmetic reasons.
Ceiling Radiation Damper (inches)
| GeminiSeries | ModelNo. | A | B | C | D |
|---|---|---|---|---|---|
| 122-184 | CRD1 | 14-1/2 | 12-3/8 | 6-3/16 | 4-3/16 |
| 220-240 | CRD2 | 12-5/8 | 10-1/8 | 5-1/16 | 4-3/16 |
| 320-340 | CRD3 | 12-5/8 | 11-1/8 | 5-9/16 | 4-3/16 |
| 420-740 | CRD4 | 17-5/8 | 12-1/4 | 6-1/08 | 4-3/16 |
Unit Filter The grille mounted unit filter is a washable aluminum mesh filter which is placed between the grille and the unit. This filter reduces the accumulation of dirt build-up on the motor and the fan wheel. Dirt build-up on the motor can cause the motor to overheat and fail. Dirt build-up on the fan wheel can reduce performance and cause imbalance which leads to higher noise levels.
Filter Box The Gemini Filter Box can be mounted either directly before the Gemini N-Line fan or remotely in the duct work. The Gemini filter box features a removable filter drawer and a washable filter media. The Gemini filter box is constructed of corrosion resistant galvanized steel. Other filter media is available by consulting the factory.
| Unit | Filter | A | B | C |
|---|---|---|---|---|
| 220, 240 | GFB-200 | 12-1/16 | 9-7/16 | 5 |
| 320, 340 | GFB-300 | 12-1/16 | 10-7/16 | 5 |
| 420-740 | GFB-400 -GFB-700 | 16-11/16 | 11-11/16 | 6 |
| 822, 842, 862 | GFB-800 | 26-3/4 | 14-1/4 | 6 |
| 920, 940, 960 | GFB-900 | 30-3/4 | 14-1/4 | 6 |
| 1000 | GFB-1000 | 37-11/16 | 14-1/4 | 6 |
| 2000 | GFB-2000 | 45-3/16 | 15-7/8 | 6 |
Brick Vent All dimensions in inches. Frame and blades are constructed from .125" thick materials. Designed for maximum protection against water entering building with 4" deep frame and 45 degree blades. The vents come standard with clear anodized finish.
| GeminiSeries | Model No. | A | B | C |
|---|---|---|---|---|
| 122-184 | BV1 | 4-3/04 | 16-1/2 | 4 |
| 220-420 | BV2 | 4-3/04 | 16-1/2 | 4 |
| 520-720 | BV5 | 7-3/04 | 16-1/2 | 4 |
| 822-1000 | BV8 | 24 | 24 | 2 |
| 2000 | BV20 | 30 | 30 | 2 |

Conversion Kits The Gemini Conversion Kits include all the necessary components to field convert a Gemini 100 series fan from a ceiling to inline installation, or vice versa.
Round Duct Wall Cap with Damper All dimensions in inches. Standard construction features - Corrosion resistant aluminum with integral aluminum backdraft damper.
| Unit | Accessory Model | A | B | C | D | E |
|---|---|---|---|---|---|---|
| 122-340 | WCR6-Alum. | 8 | 7 | 6 | 8-1/2 | 12-3/4 |
| 220-520 | WCR8-Alum. | 10 | 9 | 8 | 8-1/2 | 14-1/4 |
Round Duct Adapter The Gemini 200-500 can be field converted from a rectangular outlet to a round outlet by removing the rectangular damper frame and replacing it with the round duct adaptor.
Roof Jack All dimensions in inches.
Standard Construction Features - Corrosion resistant galvanized steel with black baked enamel finish, 1/2" birdscreen. Optional Roof Jack Adapter is available for the RJ200. The Roof Jack Adapter is a transition from the Gemini Fan to the Roof Jack. The RJR100 has an integral 6 inch round adapter for ease of installation of duct.
| Unit | Accessory Model | A | B | C | D | E | Throat Size |
|---|---|---|---|---|---|---|---|
| 122-184 | RJR100 | 14-1/4 | 18-3/4 | 10-3/8 | 14-1/2 | 6-1/02 | 6 Dia. |
| 220-520 | RJ200 | 14-1/4 | 18-3/4 | 10-3/8 | 14-1/2 | 6-1/02 | 10-1/4 X 10-3/4 |
Roof Cap All dimensions in inches.
Standard Construction Features - All aluminum construction, anti-backdraft flange. Available with optional birdscreen.
PR8F, PR12F and PR20F mount directly on the roof with integral flashing. PR8, PR12, PR16 and PR20 are curb mount.
| Unit | Accessory Model | Type | A | B | C | Throat Size |
|---|---|---|---|---|---|---|
| 122-520 | PR8 | Curb Mount | 18-1/4 | 10-1/8 | 18 | 8-19/32 |
| PR8F | Flat Base | 18-1/4 | 8-1/8 | 18 | 8-19/32 | |
| 620-740 | PR12 | Curb Mount | 28-1/4 | 10-5/16 | 20 | 12-1/2 |
| PR12F | Flat Base | 28-1/4 | 8-5/16 | 20 | 12-1/2 | |
| 822-960 | PR16 | Curb Mount | 28-1/4 | 8-5/16 | 28 | 16-1/2 |
| PR16F | Flat Base | 28-1/4 | 10-5/8 | 28 | 16-1/2 | |
| 1000-2000 | PR20 | Curb Mount | 36-1/2 | 13-5/8 | 32 | 20-1/2 |
| PR20F | Flat Base | 36-1/2 | 11-5/8 | 32 | 20-1/2 |
Eave Elbow All dimensions in inches.
| GeminiSeries | Type | Model No. | A | B | C | D |
|---|---|---|---|---|---|---|
| 220-520 | Short | SE 2 | 8-1/8 | 12-1/4 | 12-1/4 | 6-1/8 |
| 220-520 | Long | LE 2 | 8-1/8 | 15-1/2 | 14 | 6-1/8 |
Wall Cap All dimensions in inches. Standard Construction Features - Corrosion resistant galvanized steel or aluminum, 1/2" birdscreen.
| Accessory Model | A | B | C | D | ||
|---|---|---|---|---|---|---|
| Galv. | Alum. | |||||
| 220-520 | WCG-2 | WCA-2 | 10-5/16 | 7-3/16 | 6-3/8 | 8-5/16 |
| 620-740 | WCG-6 | WCA-6 | 12-13/16 | 6 | 5 | 10-13/16 |
| 822-860 | WCG-8 | WCA-8 | 22-5/16 | 7-3/16 | 6-3/16 | 20-5/16 |
| 920-960 | WCG-9 | WCA-9 | 26-9/16 | 7-15/16 | 6-15/16 | 24-9/16 |

Roof Curb All dimensions in inches. Gravity dampers are not recommended with the Gemini fans. Motorized dampers are available, by consulting factory. Sound curbs available. Contact factory for dimensions.
| Roof cap | Accessory Model | F Sq. | V Sq. | W Sq. | Roof | |
|---|---|---|---|---|---|---|
| Galv. | Alum. | |||||
| PR8 PR8F |
RCG-16 | RCA-16 | 16-1/2 | 20-1/2 | 9/3/2004 | 13-1/2 |
| PR12 PR12F |
RCG-18 | RCA-18 | 18-1/2 | 22-1/2 | 11/3/2004 | 15-1/2 |
| PR16 PR16F |
RCG-26 | RCA-26 | 26-1/2 | 30-1/2 | 19-3/4 | 23-1/2 |
| PR20 PR20F |
RCG-30 | RCA-30 | 30-1/2 | 34-1/2 | 23-3/4 | 27-1/2 |
Motor The Gemini fans can be specified to meet different line voltages. The Gemini 100 series is available in standard 115-volt. Contact factory for other voltages available. The Gemini 200-900 series are available in standard 115-volt or optional 220/240 volt. The Gemini 1000 and 2000 are available in single-phase 115/208-230 volt or three-phase 208-230/460.
Gemini GC 100 Series
Gemini 200 - 2000 Ceiling and Inline Series
The Gemini 200 - 2000 ceiling and inline series of fans can be installed as a standard ceiling installation or as an inline installation. The fan can be converted in the field from a standard ceiling construction to an inline construction. Airflow is illustrated by the black arrows. Shaded areas illustrate ductwork furnished by the installer. 

Catalog
Manual
- Gemini Manual
- Gemini Ceiling and Cabinet Fans
- Gemini Supplement Curtain Style Ceiling Radiation Dampers
- Gemini Supplement Ceiling to Inline Conversion Kit
- Gemini Supplement Inline to Ceiling Conversion Kit
- Gemini Isolator Kit Ceiling and Cabinet Fans Supplement
- Gemini Supplement Gemini 100 Series UL 507 IOM
- Gemini Supplement Gemini wMotion Sensor
Specifications
Submittals
- GEMINI Isolator Kit - 100 Series submittal
- GEMINI Round Duct Adapter - 200-500 Series submittal
- GEMINI Wall Cap w/Damper - Round Duct submittal
- GEMINI - MOTION SENSOR SWITCH submittal
- GEMINI Roof Cap / Brick Vent submittal
- GEMINI Ceiling Fan - 100 Series submittal
- GEMINI 100 GRILL OPTIONS submittal
- GEMINI Ceiling Fan - 200-700 Series submittal
- GEMINI - MOTION SENSOR SWITCH CEILING submittal
- GEMINI Inline Fan - 200-700 Series submittal
- GEMINI Inline Fan - 100 Series submittal
- GEMINI Inline Fan - 800-900 Series submittal
- GEMINI Ceiling Fan - 800-900 Series submittal
- GEMINI FILTER submittal
- GEMINI INLINE BLOWER 1000 & 2000 SERIES submittal
- GEMINI Wall Cap / Roof Jack / Eave Elbow submittal
- GEMINI 1000 & 2000 Series submittal
- GEMINI Filter Box / Ceiling Radiation Damper submittal








