AC INFINITY
AC Infinity Air Filtration Kit 4" with AI Environment Controller, Upgraded Inline Fan, Carbon Filter
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 Air Filtration Kit PRO 4" – AI Controller, Inline Fan, Carbon Filter & Ducting
Take intelligent control of your grow tent ventilation with the AC Infinity Air Filtration Kit PRO 4". This complete extraction package combines a powerful 4-inch CLOUDLINE inline fan, the advanced Controller AI+, a premium Australian carbon filter and heavy-duty flexible ducting to create an efficient all-in-one climate and odour-control system.
Designed to remove hot, stale air while helping maintain stable environmental conditions, the system uses AI-powered climate management to analyse previous results, anticipate environmental changes and dynamically adjust fan output. This makes it ideal for growers looking for more accurate temperature, humidity and VPD control without relying entirely on manual adjustments.
What Is Included?
- 4" AC Infinity CLOUDLINE inline duct fan
- AC Infinity Controller AI+
- 4" premium activated carbon filter
- 25ft flexible aluminium ducting
- Carbon filter pre-filter cloth
- Duct clamps
- Rope clip hangers
- Hanging straps
- Installation accessories
Key Features
- Complete 4-inch air filtration and ventilation package
- AI-powered environmental controller with intelligent automation
- 205 CFM airflow for effective grow tent extraction
- Quiet 29 dBA operating noise
- Energy-efficient PWM-controlled EC motor
- Automatic temperature, humidity and VPD management
- Wi-Fi app access for remote monitoring and control
- Premium Australian virgin activated carbon
- 1200+ IAV carbon rating for effective odour adsorption
- 38mm deep carbon bed for extended filtration performance
- 25ft heavy-duty four-layer flexible ducting
- Compatible with the AC Infinity UIS ecosystem
- UK specification with a UK plug
AI-Powered Environmental Control
The included Controller AI+ goes beyond basic on/off triggers and fixed fan schedules. It continuously observes your growing environment, analyses previous adjustments and learns how connected equipment affects temperature, humidity and VPD.
By anticipating environmental changes, the controller can gradually adjust the inline fan to help reduce temperature and humidity fluctuations while avoiding unnecessary overcorrection. Growers can choose from AI-assisted presets or create more detailed customised settings through the AC Infinity app.
Remote Monitoring Through the AC Infinity App
Connect the Controller AI+ to Wi-Fi to monitor your environment from a compatible mobile device. The app provides access to live climate information, intelligent insights, equipment controls, schedules and environmental data from almost anywhere.
This makes it easier to check conditions, change settings and respond to environmental changes without needing to remain beside the grow tent.
Powerful and Quiet CLOUDLINE Inline Fan
The upgraded 4-inch CLOUDLINE fan uses a PWM-controlled EC motor to deliver strong, energy-efficient airflow with minimal heat and noise. Its mixed-flow design combines stator blades and aerodynamic components to move air efficiently through carbon filters and ducting.
Capable of producing up to 205 CFM while operating at just 29 dBA, the fan provides dependable extraction without creating excessive background noise.
Premium Activated Carbon Filtration
The included carbon filter uses Australian virgin RC412 activated charcoal with a 1200+ IAV rating. Its highly porous carbon structure helps capture unwanted odours and airborne compounds as extracted air passes through the filter.
A 38mm carbon bed provides excellent contact time, while the reversible flange allows the filter to be turned around during its working life to encourage more even carbon use. The powder-coated gunmetal body also helps protect against rust and corrosion in humid environments.
Heavy-Duty Flexible Ducting
The supplied 25ft ducting features multiple protective layers, including an aluminium foil interior, spiral steel-wire support and durable PVC outer protection. This helps resist tearing, pinholes and air leakage while allowing the ducting to bend around grow tent frames and ventilation equipment.
Complete Installation Package
This kit contains the main equipment and accessories required to build a complete extraction system. The included hanging straps and rope clip hangers make it easier to suspend the fan and filter, while the duct clamps help create secure connections between each component.
Technical Specifications
| Product Model | AC-FKT4 |
| Duct Size | 4" / 100mm |
| Maximum Fan Airflow | 205 CFM |
| Maximum Filter Airflow | 210 CFM |
| Noise Level | 29 dBA |
| Maximum Fan Speed | 2800 RPM |
| Static Pressure | 324 Pa |
| Maximum Power Draw | 28W |
| Average Power Usage | 21W |
| Operating Humidity | 35–85% RH |
| Ingress Protection | IP44 |
| Fan Bearings | Dual Ball Bearings |
| Estimated Fan Life | 67,000 Hours |
| Carbon Type | Australian Virgin RC412 Activated Carbon |
| Carbon Rating | 1200+ IAV |
| Carbon Bed Thickness | 38mm |
| Ducting Length | 25ft / 7.6m |
| Power Connection | UK Plug |
Ideal For
- Small grow tents
- Indoor grow rooms
- Hydroponic growing systems
- Temperature and humidity management
- VPD-based environmental control
- Hot and stale air extraction
- Odour filtration
- Automated grow tent ventilation
- Remote climate monitoring
Frequently Asked Questions
What is the difference between this PRO kit and the standard filtration kit?
The PRO version includes the Controller AI+ and an upgraded CLOUDLINE inline fan. This provides advanced Wi-Fi connectivity, intelligent environmental monitoring and AI-powered fan adjustments rather than basic manual speed control.
Can the system automatically control temperature and humidity?
Yes. The Controller AI+ monitors environmental conditions and can automatically adjust the connected inline fan according to temperature, humidity and VPD targets.
Can I control the system remotely?
Yes. Once connected to Wi-Fi, compatible settings and environmental information can be accessed through the AC Infinity app.
Does the kit include everything required for installation?
The package includes the inline fan, AI controller, carbon filter, flexible ducting, pre-filter cloth, clamps, hanging straps and rope clip hangers needed for a typical grow tent ventilation installation.
Is the fan suitable for continuous operation?
Yes. The fan uses dual ball bearings and an energy-efficient EC motor designed for dependable long-term ventilation in demanding environments.
Intelligent Ventilation in One Complete Kit
The AC Infinity Air Filtration Kit PRO 4" combines smart environmental control with efficient extraction and premium odour filtration. With its AI-powered controller, quiet EC inline fan, Australian carbon filter and complete installation accessories, it provides a convenient way to create a cleaner, more stable and intelligently managed indoor growing environment.
