AC INFINITY
AC Infinity Multifan S4, Quiet USB Cooling Fan, 140mm
Pickup available at Bansley Store
Usually ready in 24 hours
Shipping & Returns
Our current shipping rates are as follows:
- UK Orders Over £50 – Free Next Day Delivery
- UK Orders Under £50 – £8 (Next Day Delivery)
- UK Orders Next Day AM – £20
- UK Orders Saturday AM – £30
- International Orders DAP – Select between UPS or Fedex and we'll sort the rest. (All duty paid by us prior to shipping)
All parcels are fully tracked. Once your order has been dispatched, you’ll receive an email containing your tracking number.
If your order is classed as an oversized item OR deemed extra heavy, additional heavy shipping duty will be added at checkout when selecting your shipping options.
Returns
We want you to be completely satisfied with your purchase, but if you change your mind, you may cancel your order within 14 days of receipt for a full refund, provided the items are unused and in resalable condition.
Once your cancellation has been confirmed, you must return the items within 14 days, ideally in their original packaging.
Click & Collect
Order online and collect directly from our Sheffield OR Barnsley store. Once your order is ready, you’ll receive an email or phone confirmation with collection details. Please wait for confirmation before travelling to ensure your order is prepared.
Please have your order number ready to give to a member of staff when you arrive.
Sheffield Store:
GSH Retail Ltd
Unit 5, 230 Woodbourn Road
Sheffield
S9 3LQ
Barnsley Store:
GSH Retail Ltd
Unit 6, Rockingham Business Park
Rockingham Row, Birdwell
Barnsley, S70 5TW
Local Same Day Delivery Service
Our man in a van!
Same-Day Delivery Service
Enjoy fast, reliable, and fully discreet same-day delivery with Green Spirit when you order from our Sheffield store area.Whether you shop online or
in-store, we make getting your items easy,convenient, and secure.
Order Online
When placing your order through our website, simply select the Same-Day Local Delivery option at checkout.
- Free Same-Day Delivery on orders over £250.00
- Available customers within a 3-mile radius of our Sheffield store (S9 3LQ)
- Orders under £250.00 can still be delivered the same day for a £50.00
flat fee
Your order will be prepared and delivered directly to your
door the very same day, using our discreet delivery service.
Order In-Store
If you prefer to shop in person, visit our Sheffield
location to browse, purchase, and arrange delivery.
- Pay
in full for your items in-store - Choose
a delivery time and date that suits you best - Our
team will ensure a smooth and convenient handover
Discreet Delivery Promise
We understand the importance of privacy.
- All
our delivery vans are plain and unmarked, with no company
branding - Parcels
are packaged in plain or black wrapping for complete discretion
Delivery Requirements
To ensure everything runs smoothly:
- Customers
must be present at the agreed delivery time - Drivers
cannot wait for extended periods - If
the customer is not available, items will be returned to the store and a £50.00
redelivery fee will apply
Upon
delivery, we will request a order number, name and signature to
confirm receipt
Discreet Shipping
All orders from GSH Retail Ltd are packed securely and shipped in Plain unbranded boxes for your privacy. We understand that discretion is important, so no external markings or product details are visible on the packaging.
Each parcel is also wrapped in durable black film and sealed with fragile tape to ensure both security and protection in transit.
We take great care to make sure your order arrives safely, discreetly, and in perfect condition — every time.
Methods Of Payment
We accept a wide range of secure payment options for your convenience when shopping with GSH Retail LTD
You can pay using:
Visa, Mastercard, American Express, and Discover
Apple Pay, Google Pay, and Shop Pay
PayPal – Fast and secure online checkout with buyer protection
Klarna – Flexible payment options, including Pay in 3 instalments or Pay Later
Clearpay – Split your purchase into four interest-free payments
Weston Union– Supported for international customers
Cash In The Post - This is at your own risk! Please make sure it is signed for, tracked, and insured.
Manual Bank Transfer - Contact a member of staff to organise paying via bank transfer.
All transactions are processed securely through Shopify’s encrypted checkout. Your payment details are never shared directly with us.
Once your order is placed, you’ll receive an order confirmation email, followed by tracking details once your parcel has been dispatched.
Finance Options
We offer flexible finance options to make purchasing easier. You can choose to spread the cost of your order, all three options are interest-free and give you the flexibility to manage your payments in a way that suits you.
PayPal Pay in 3
PayPal Pay in 3 allows you to divide your purchase into three equal interest-free payments over two months. The first payment is made at checkout, followed by two automatic payments each month.
It is available on orders between £30 and £2,000, and approval is completed instantly through your PayPal account. You can view, manage, or make payments easily through the PayPal app or your online account.
Shop Pay
Shop Pay Installments lets customers pay for an order in smaller increments over time.When available, Shop Pay Installments is a great option to help you maximize your budget for orders between the following amounts, depending on your location:
Klarna
Klarna offers two flexible ways to pay. With Pay in 3 instalments, your order total is divided into three equal payments, taken every 30 days with no interest or fees when paid on time. Alternatively, you can choose Pay Later in 30 Days, allowing you to receive your order first and settle the balance within 30 days. Klarna provides instant approval at checkout, and all payments can be managed securely through the Klarna app.
Clearpay
Clearpay lets you spread the cost of your purchase into four equal interest-free payments, taken automatically every two weeks. The first instalment is paid at the time of purchase, and the remaining three are collected automatically over six weeks. Clearpay is available for orders between £30 and £1,000 and can be managed easily through the Clearpay app.
Important Information
All finance options are subject to eligibility and approval by the provider. Late or missed payments may affect your credit score, so please ensure funds are available when payments are due. For details about eligibility, limits, or payment schedules, please refer to the provider’s website or app.
Earning Points & Rewards
At GSH Retail we believe loyalty should be rewarded - Our Points & Rewards scheme allows you to collect points every time you shop and redeem them for discount codes to use on future purchases.
When you make a purchase through our website, you’ll automatically earn points based on the value of your order. These points are added to your account and can be saved or redeemed whenever you choose. Once you’ve collected enough points, you can exchange them for a unique coupon code that can be applied at checkout to reduce the cost of your next order.
Earn 5 Points for every £1 spent
Redeem 100 Points for £1 Store Credit
Your points never expire as long as your account remains active, and you can track your balance easily through your customer account dashboard. It’s our way of saying thank you for choosing GSH Retail Ltd
To redeem your points, simply log into your account, view your available balance, and follow the on-screen instructions to generate a discount code. Enter the code at checkout to instantly apply your reward.
AC Infinity MULTIFAN S4 Quiet USB Cooling Fan – 140mm
Keep electronics, controllers and heat-producing equipment running cooler with the AC Infinity MULTIFAN S4 Quiet USB Cooling Fan. Featuring a larger 140mm fan design, the MULTIFAN S4 delivers up to 57 CFM of airflow while producing just 18 dBA of noise, providing powerful targeted cooling without excessive background noise.
An integrated multi-speed controller allows you to adjust the airflow to suit your equipment and environment, while premium dual-ball bearings provide a rated lifespan of up to 67,000 hours. The bearing system also allows the fan to operate either horizontally or vertically, giving you plenty of flexibility when positioning it around your equipment.
USB-powered operation, a generous 6ft cable, anti-vibration rubber feet and the ability to daisy chain additional compatible MULTIFAN units make the S4 an excellent cooling solution for grow room electronics, controllers, computers, AV equipment, games consoles, amplifiers and other heat-producing devices.
Key Features
- Large 140mm USB cooling fan
- Delivers up to 57 CFM airflow
- Ultra-quiet operation at just 18 dBA
- In-line multi-speed controller with power switch
- Adjustable airflow for different cooling requirements
- Premium dual-ball bearing system
- Rated lifespan of up to 67,000 hours
- Can operate horizontally or vertically
- USB powered for simple installation
- 6ft / 1.8m power cable
- Eight anti-vibration rubber feet help reduce noise and movement
- Additional USB connection for daisy chaining compatible MULTIFAN units
- Up to four compatible fans can share a suitable USB power source
- Low 1.5W power consumption
- CE and RoHS certified
- Fan meets UL-507 safety standards
Powerful 57 CFM Airflow
The larger 140mm fan allows the MULTIFAN S4 to deliver up to 57 CFM of airflow, making it an excellent choice when more cooling performance is required from a compact USB-powered fan.
Its larger blade area allows substantial volumes of air to be moved at relatively low fan speeds, helping provide effective cooling while maintaining exceptionally quiet operation.
Ultra-Quiet 18 dBA Operation
Despite its increased size and airflow capacity, the MULTIFAN S4 produces just 18 dBA of noise.
This makes it particularly suitable for equipment that requires continuous cooling in noise-sensitive environments, providing effective airflow without the distracting sound associated with many conventional equipment cooling fans.
Adjustable Multi-Speed Controller
The included in-line multi-speed controller allows you to adjust fan performance depending on the amount of cooling required.
Increase the speed when additional airflow is needed or reduce it when only gentle ventilation is required. This gives you greater control over the balance between cooling performance, airflow and operating noise.
The controller also features a convenient power switch, allowing the fan to be turned off without disconnecting the USB cable.
Premium Dual-Ball Bearings
The MULTIFAN S4 uses premium dual-ball bearings engineered for reliable long-term operation.
With a rated lifespan of up to 67,000 hours, the fan is suitable for applications where regular or continuous equipment cooling is required.
The dual-ball bearing construction also allows the fan to operate in either a horizontal or vertical position without compromising its expected lifespan, providing much greater flexibility when positioning the unit.
USB Powered for Easy Installation
The MULTIFAN S4 is USB powered, allowing it to connect to compatible USB power sources commonly found on computers, AV equipment, games consoles and other electronic devices.
A generous 6ft / 1.8m power cable gives you plenty of freedom when positioning the fan around equipment racks, cabinets and grow room electronics.
With power consumption of just 1.5 watts, the S4 also provides an energy-efficient option for equipment requiring extended periods of cooling.
Connect Multiple MULTIFAN Units
For larger installations requiring additional airflow, compatible MULTIFAN S Series fans can be daisy chained together.
Each fan features an additional USB connection, allowing up to four compatible MULTIFAN units to share the same suitable USB power source. This provides an easy way to expand your cooling setup without requiring individual power connections for every fan.
Anti-Vibration Rubber Feet
The MULTIFAN S4 includes eight large anti-vibration rubber feet that help absorb movement and reduce vibration transferred between the fan and surrounding surfaces.
This allows the fan to be placed directly on top of or beside compatible equipment while helping maintain quiet and stable operation.
Horizontal or Vertical Positioning
Thanks to its premium dual-ball bearing construction, the MULTIFAN S4 can be positioned either flat or upright.
This versatility makes it easier to direct airflow exactly where it's needed, whether you're drawing warm air away from electronics, pushing fresh air towards equipment or improving ventilation inside an equipment cabinet.
Ideal for Grow Room Equipment
Controllers, power supplies and other electronic equipment inside grow rooms can generate additional heat, particularly when several devices are positioned close together.
The MULTIFAN S4 provides targeted airflow around these components without requiring a full-size circulation fan. Its combination of high airflow, low noise, compact dimensions and USB power makes it a convenient option for additional equipment cooling within indoor growing environments.
Popular Applications
- Grow room controllers and electronics
- Power supplies and electrical equipment
- Computers and computer components
- AV receivers
- Amplifiers
- Games consoles
- DVRs and media equipment
- Routers and modems
- Electronic cabinets
- Equipment racks
- Home entertainment systems
- Other heat-producing electronics
Technical Specifications
| Product | AC Infinity MULTIFAN S4 Quiet USB Cooling Fan |
| Model | AI-MPF140A |
| Fan Size | 140mm |
| Dimensions | 14 × 14 × 2.5cm |
| Maximum Airflow | 57 CFM |
| Noise Level | 18 dBA |
| Maximum Speed | 1,200 RPM |
| Static Pressure | 0.84 mm-H2O |
| Operating Voltage | 3–7V DC |
| Power Consumption | 1.5W |
| Current | 0.3A |
| Power Connection | USB |
| Cable Length | 6ft / 1.8m |
| Bearings | Dual Ball |
| Rated Lifespan | 67,000 Hours |
| Mounting Position | Horizontal or Vertical |
| Certifications | UL, CE & RoHS |
MULTIFAN S1, S3 or S4?
The MULTIFAN range provides several fan sizes, allowing you to choose the level of airflow that best suits your equipment and available space.
- MULTIFAN S1 – 80mm: Compact option delivering up to 26 CFM, ideal for smaller electronics and restricted spaces.
- MULTIFAN S3 – 120mm: Mid-sized option delivering up to 52 CFM for increased equipment cooling.
- MULTIFAN S4 – 140mm: Larger single-fan option delivering up to 57 CFM for applications requiring greater airflow coverage.
For applications where space allows and maximum airflow from a single MULTIFAN is preferred, the 140mm S4 provides an excellent combination of cooling performance and quiet operation.
Frequently Asked Questions
How much airflow does the MULTIFAN S4 produce?
The MULTIFAN S4 delivers up to 57 CFM of airflow from its 140mm fan.
How quiet is the MULTIFAN S4?
The fan produces just 18 dBA of operating noise, making it suitable for environments where quiet continuous cooling is important.
Can I adjust the fan speed?
Yes. The included in-line multi-speed controller allows you to adjust the fan to achieve the preferred balance between airflow and operating noise.
Can the MULTIFAN S4 be laid flat?
Yes. Its dual-ball bearing construction allows the fan to operate either horizontally or vertically, giving you greater flexibility when directing airflow around your equipment.
Can I connect multiple MULTIFAN fans together?
Yes. Compatible MULTIFAN S Series fans can be daisy chained together, with up to four compatible units sharing a suitable USB power source.
Is the MULTIFAN S4 suitable for continuous use?
Yes. The premium dual-ball bearing system has a rated lifespan of up to 67,000 hours, making the S4 suitable for applications requiring regular or extended operation.
Powerful & Quiet 140mm Equipment Cooling
The AC Infinity MULTIFAN S4 Quiet USB Cooling Fan is an excellent choice when you need increased airflow without the noise and bulk of a conventional circulation fan. Its large 140mm design delivers up to 57 CFM while maintaining an exceptionally quiet 18 dBA noise level.
With adjustable speed control, USB power, long-life dual-ball bearings, anti-vibration feet and flexible horizontal or vertical positioning, the MULTIFAN S4 provides reliable targeted cooling for grow room equipment, computers, AV systems and a wide range of heat-producing electronics.
