Improving on the incredibly successful and popular Enviro Controller V2, this all-in-one environment controller has some updated features to suit today's grower as well as an easy-to-replace probe that drastically increases the durability and lifespan of the unit. By replacing the two AC fan sockets with two 'free' programmable sockets (for lights, heaters, humidifiers, circulation fans etc), this controller is now able to control double the devices of the previous version while also being able to handle twice the electrical load - up to 26amps!

Please note that this controller is compatible only with EC fan motors (which are superior in almost every way to AC - check out our blog post on the subject here.)

The Envrio4 controller developed by Global Air Supplies gives you complete control of your environment so you can optimise your grow. It controls EC fan speeds and can also regulate ‘on’ and ‘off’ times for practically any piece of equipment in your grow room (via the four programmable sockets). This simplifies your set-up, making it easy to control your grow room and maintain a perfect environment from a single point.

With the Enviro4 you can centralise the control of all your growing equipment, due to the four programmable sockets which can control up to 26 amps of power (twice as much as the Enviro v2). Previously you would need two controllers for this amount of power, which would introduce the risk of the controllers fighting against each other. Additionally, the temperature sensor probe, can now easily be replaced using a connector socket on the exterior of the unit. By using the Enviro4 your equipment works in unison to create the perfect environment.

Control EC Fans

The controller manages your grow room temperature and humidity by digitally controlling your fan speeds. The Enviro4 Controller will automatically control fan speed for EC fans. It can control both your intake and outtake fans for your grow room. It is built to work perfectly with the Systemair Revolution EC fan range.

Perfect Your Environment

The Enviro4 temperature and humidity sensor is easy to set up in your grow room and uses a thermostat to detect changes in the environment, regulating automatically to your pre-programmed parameters, so there will never be any temperature fluctuations in your grow room. Humidity levels are also monitored and maintained with the humidity sensor. You can program day and night settings to keep your desired grow room climate. The Envrio4 also has an upgraded probe, allowing it to easily be replaced.

Multi-Functional

As well as controlling your fans, the Enviro4 comes with four extra fully programmable sockets that can control other environmental grow room equipment such as heaters, humidifiers, dehumidifiers, and lights. Heaters can be set to come on whenever temperatures drop below pre-set levels. For heaters, humidifiers, and dehumidifiers you can choose different settings for day and night, so you’ll always maintain the perfect grow room environment. You can control most grow room equipment provided it doesn’t exceed 2,200 watts per exit. In the instance of grow lights, please don’t exceed 2,400 watts (across all four plugs) as they have a high start-up surge.

The Enviro4 also has a dump feature for closed-loop environments. For a full how-to guide, please see our Enviro4 Controller Instructions.

Key Benefits

• Controls EC fans
• Controls and regulates temperature and humidity
• Control humidifiers, dehumidifiers, heaters, lights and other equipment with a timer
• Centralise your control and simplify your grow room
• Easily replace the probe
• Day and night settings
• Dump feature for closed-loop environments
• LCD display
• 4 programmable sockets
• Simple navigation and set up
• Fan balancer
• For grow lights don’t exceed 2,400 watts (4x 600 watt lights)
• Built-in fan balancer to run both outtake and intake fans
• Max 26 amp total
• 1.2 metre power leads
• 3.8 metre probe length
• Dimensions 20x9cm
• Compatible with Systemair EC fans, Rhino Ultra EC fans and Hyper fan V2 with additional cable

You can find the classic Enviro Controller V2 (capable of controlling AC as well as EC fans) here.

We offer the following shipping options to the mainland UK. If you live outside mainland UK please call us on +44 (0)1142 280024.

Delivery service options (mainland)

Free delivery up to 25 KG (Orders over £75) 1-2 day service 

Royal mail tracked 24 - £3.99 (up to 2KG only)

Royal mail tracked 48 - £3.29 (up to 2KG only)

Next working day - £6.75 up to 25KG (orders under £75)

Next working day - £9.95 Over 25KG (orders under £75)

Next working day - A.M. £10.95 Under 25KG

Next working day - A.M. £14.95 Over 25KG

Delivery service options (NI & highlands)

Express (2-4 Working Days): £29.95 

Parcelforce 48 (2-3 Working Days)

Bulky Goods 

Items that exceed 1m in length or are bulky in volume will incur a Bulky Goods surcharge (per item).

Bulky Goods Shipping Charges (excludes highlands):

Economy (3-5 Days) £8.95

Express (1-2 Days) £21.95

All orders are packed in plain discreet parcels with non descript labels for your personal security.

We offer the following shipping options to the mainland UK. If you live outside mainland UK please call us on +44 (0)1142 280024.

Royal Mail delivery options (mainland UK)

Royal mail tracked 24 £3.99 (up to 2KG only)

Royal mail tracked 48 £3.29 (up to 2KG only)

Courier  Delivery service options (mainland) Zone A Zone A+ Zone B Zone B+

Free delivery up to 25 kilos (over £75) 1-2 day service 
Next working day  £6.75 up to 25KG 
Next working day am £9.95 over 25KG

Courier Delivery service options Zone C Zone C+ Zone D Zone D+

Next working day  £29.95 + 75P per kg over 25KG
Next working day am £35 + 75P per KG over 25KG

All packages are shipped in plain, discrete packaging. Absolutely NO information is passed to third parties.

Please note that paid for next day delivery only applies if you order before 1PM Monday to Thursday.

Our UK delivery zones: In the UK we have 4 zones. Prices and parcel delivery times vary by zone.


Tracking your consignments

Our deliveries are handled by Parcelforce or DHL PARCEL UK depending on the weight and location.You are able to track your parcels by using your consignment number or customer reference and postcode. If using a reference number to search, please also insert the delivery postcode.​ You will receive an email on the day for dispatch confirming your order and tracking number, with DHL PARCEL UK option you can select a delivery window or change the day of delivery by clicking the link below and manage my delivery option.


Other Services Available

Isle of Wight & isles of Scilly £5.99 extra per consignment

Timed booked delivery £15.99 extra per consignment

Long bulky items £29.99 extra per consignment (1.4m x 0.8m 0r two persons needs to carry )

We Won't Be Beaten On Price

At Hytec Horticulture we are committed to offering the best range of hydroponic products at the best possible prices, this is why we have our Price Match Promise whereby if you find an identical product at one of our competitors for a lower price. We will match or even beat it.

In an ever-increasingly competitive marketplace, many product lines are being sold at varying prices. We want to give you the best deal so if you find any of the products we sell (or comparable products) at cheaper prices, give us a chance to get your business, save you money, and beat the price. Call us now for a price! This website is constantly being updated and is just a taster. For our full product ranges, please visit the store to discuss your requirements.



Terms & Conditions

To qualify for the Price Match Promise, the product must conform to the following:

The product in question must be identical, it should be the same brand & model and on sale with the same terms & conditions
The product must be held in stock by the competitor at the time you want to make the price match
In addition to the above, we must also have the product in stock
We must be able to verify the lower price either by the store's website, a phone call or a written quote on headed notepaper
The product is not part of a promotion, sale or clearance offer
The product must be available from a physical store that’s open to the public
Our Price Match Promise is not available against web-only retailers, for example, eBay or Amazon, along with factory outlets, private or liquidation sales
Typographical errors, incorrect pricing, voucher codes or additional discounts by the competitor, including their own price match offers, are excluded


Large & Multiple Product Orders

If you want to place a large order with multiple products, for example, you're setting up a grow room from scratch and require a full setup including tent, lights, extraction, nutrients, grow media and everything in-between, then get in touch and we will aim to match, or even beat any quotes you’ve already got.



To price match online

Please fill out the form below with a link to the website and ask for more information as you can and we will email back with our best price.