Grower Tip
- Sit one fan each side of a driver box or controller shelf — the 0.75m cord between the two fans gives you that spread.
- Flip a fan over to swap it between intake and exhaust, handy for pulling heat out of a sealed gear cupboard.
- Rated for 35–85% RH, so veg and flower tent air is fine; keep it out of a propagation dome running wetter.
- When chaining fans, set the ones nearest the power source to high so the units downstream still get enough current.
Features
Two 80mm fans run from one controller at 2000 RPM, moving 26 CFM each.
A cord-mounted switch sets low, medium, high or off to balance airflow against noise.
Rated at 67,000 hours L10 life, and let the fans lay flat or stand upright.
Total rated noise is 18 dBA at full speed.
Flip a fan over to turn it from an intake into an exhaust, with no rewiring.
Runs from any dedicated USB port rated 500mA or higher, drawing 1.1W at 3 to 7V DC.
Each unit carries a spare USB port, so up to four fans share one power source.
Eight rubber feet per fan cut vibration noise, and unscrew for a slimmer footprint.
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1
Position the fans
Stand them upright, lay them flat, or bolt them to a panel; any orientation works.
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2
Point the airflow
Flip a fan over to switch it between drawing cool air in and pushing hot air out.
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3
Fit or remove the feet
Leave the silicone feet on for hard surfaces, or unscrew them for a slimmer fit and refit the screws to hold the guard.
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4
Screw-mount if needed
Use the 72 x 72mm hole spacing and 4mm screw holes to fix the fans to a board.
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5
Plug in
Run the 1.8m cord to a dedicated USB port rated 500mA or higher, or to a USB wall adapter.
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6
Set the speed
Use the inline switch for low, medium or high. When chaining fans, set those nearest the source to high.
How loud is the Multifan S5?
Total rated noise is 18 dBA at full speed across both fans, so the airflow is usually more noticeable than the motor. The inline switch drops it to medium or low if the fans sit near head height. Eight silicone feet per fan absorb the buzz you get when a fan sits directly on a hard shelf.
What powers it — is a plug included?
It runs off USB. The box holds the two fans and their speed controller, so you supply the power source: any dedicated USB port rated 500mA or higher, or a USB wall adapter. Only the Turbo Power Adapter models, marked with a P suffix, ship with an adapter included. The fans draw just 1.1W at 3 to 7V DC.
Can I run it in a grow tent?
Yes, within its ratings. The fans are rated for 35 to 85% RH and roughly -18°C to 70°C, which covers normal veg and flower tent conditions. They are built for indoor use only, and a propagation dome sitting above 85% RH is outside the rating, so mount the fans outside that space and move air across it instead.
How many fans can I chain together?
Up to four fans share one USB power source, and the S5 counts as two of those because both of its fans run off the single shared cord and controller. So one S5 plus one single-fan Multifan fills a chain. Set the fans nearest the power source to high so the units further down still get enough current.
Can I mount the fans vertically or reverse the airflow?
Both. The dual-ball bearings are rated for any orientation, so the fans stand upright, lay flat or bolt to a vertical panel without shortening bearing life. Flipping a fan over reverses it between intake and exhaust. Each fan has four 4mm screw holes on 72 x 72mm spacing, matching standard 80mm fan hardware.
What is the difference between the S5 and the single-fan Multifans?
The S5 and S7 ship as two fans on one shared controller and cord; the Mini, S1, S3 and S4 are single fans. The S5 is the dual 80mm version, so it suits spreading airflow across two points — either side of a driver box, or two separate pieces of gear — rather than concentrating it in one spot.
Description
The ultra-quiet cooling fans can be positioned to stand upright or laid flat to cool various electronics and components. Features a multi-speed controller with power switch. Includes eight large anti-vibration rubber feet per fan and a 6-foot power cord.
The USB plug can be plugged into the USB ports found behind popular electronics such as receivers and video game consoles. The two fans are permanently connected by a 2.5 feet cord and share the same multi-speed controller. Each unit contains an additional USB port, up to four fans can be daisy chained together to share the same power source.
This fan system is CE and RoHS certified and contains premium dual-ball bearings, allowing it to be mounted horizontally or vertically.
Contains AC Infinity axial fans ACX-FD8025(B)05W5 which meet UL-507 standards for safety under Underwriters Laboratories certificate E503903.
SPEED CONTROLLER
The fans include an in-line multi-speed controller with power switch to set the fan’s speed to optimal noise and airflow levels for various environments.
CONNECTING ADDITIONAL UNITS
For electronics and components that requires more airflow, each fan unit can daisy chain additional MULTIFAN S series fans. Up to four fans can share the same USB power source; and up to six fans can share the same thermal controller (sold separately). MULTIFAN S1, S2, S3 and S4 contains one fan, and MULTIFAN S5 and S7 contains two fans.
APPLICATIONS
The ultra-quiet cooling fans are popular in a variety of electronics and components such as receivers, DVRs, video game consoles, modems, computers, amplifiers, and other audio video equipment.
KEY FEATURES
- Ultra-quiet UL-certified USB fans designed to cool various electronics and components.
- Features a multi-speed controller to set the fan’s speed to optimal noise and airflow levels.
- Dual-ball bearings have a lifespan of 67,000 hours and allows the fans to be laid flat or stand upright.
- USB plug can power the fan through USB ports found behind popular AV electronics and game consoles.
- Dimensions: 3.2 x 3.2 x 1 in. per fan | Total Airflow: 52 CFM | Total Noise: 18 dBA | Bearings: Dual Ball
| Product Identification Multifan S5 DUAL FANS | |
| Manufacturer | AC Infinity Inc. |
| Product Name | MULTIFAN S5 |
| Product Model | AI-MPF80A2 |
| UPC Code | 854759004334 |
| Product Dimensions | |
| Total Dimensions | 3.2 x 3.2 x 1.0 in. (8.0 x 8.0 x 2.5 cm) |
| Hole to Hole Distance | 2.8 x 2.8 in. (7.2 x 7.2 cm) |
| Screw Hole Size | Ø 0.17 in. (Ø 0.4 cm) |
| Cord Length | 72 in. (6 feet) |
| Product Performance and Technical Specs | |
| Total Airflow | 52 CFM (26 CFM per fan) |
| Total Noise | 18 dBA |
| Speed | 2000 RPM |
| Operating Voltage | 3 to 7V DC |
| Power | 1.1 W |
| Current | 0.22 A |
| Wall Adapter Input | 100 to 240V AC |
| Static Pressure | 1.6 mm-H2O |
| Operating Humidity | 35 to 85% RH |
| Operating Temperature | 0 to 158°F |
| Fan Bearings | Dual Ball |
| Mounting Positions | Horizontal or Vertical |
| L10 Life Expectancy | 67,000 Hours |
| UL Certification (Fans Only) |
 PDF |
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