Trade Sales Contact Us
Primrose
My wheelbarrow

Shop

Information & Help

My account

15% off

Lacewing™ Essential Automatic Vent Arm Window Opener / Autovent

15% off

Lacewing™ Essential Automatic Vent Arm Window Opener / Autovent

15% off

Lacewing™ Essential Automatic Vent Arm Window Opener / Autovent
Lacewing™ Essential Automatic Vent Arm Window Opener / Autovent
Lacewing™ Essential Automatic Vent Arm Window Opener / Autovent
Lacewing™ Essential Automatic Vent Arm Window Opener / Autovent

Lacewing™ Essential Automatic Vent Arm Window Opener / Autovent

SKU: GH0476
£29.99 £25.24
In stock (delivery in 1-2 working days)
1

Pot size guide

Delivery van
Delivery options
Standard £7.99 | Named Day £11.99

Buy now pay later

Check items to add to the cart or
Thermal Extra Grip Gloves Latex All Purpose Oxford Blue Large by Smart Garden
Total Price

£0.00

Overview

Lacewing™ Essential Automatic Vent Arm Window Opener / Autovent

The autovent window opener is an all-in-one solution for greenhouse temperature control. Using a cleverly designed pressure system, the arm opens the window if the greenhouse is over a preset temperature, and closes the window below this temperature. Care for your greenhouse plants, even when you're not at home.

All greenhouses need to be well ventilated on hot and sunny days to keep plants in optimum growing conditions. The automatic vent arm uses captured gas which expands in hot temperatures, opening the window without any running costs. The simple but smart mechanism will maintain optimal temperatures at all times, whether you are or aren't at home. You can adjust the opening temperature between 15° and 20°C to suit your individual needs. Simply install the vent opener by using the instructions and let it do its job.

 

Specifications

  • Length: 32cm (1ft ½in) x Depth: 5cm (1¾in) x Height: 4cm (1½in)
  • Max. opening width: 35cm (1ft 5…”in)

Features

  • Automatically opens and closes window at preset temperature - increases air flow and relieves your plants in hot temperatures
  • Fully adjustable to open between 15°-20°C - set the temperature the window will open and close at to care for your specific plants and climate
  • Opens up to 35cm wide - opens wide to encourage air circulation
  • Mechanical system activated by heat - no electricity needed, which means no running costs
  • Perfect for windows that weigh up to 7kg - opens nearly all greenhouse windows
  • Chrome coated metal - increased corrosion resistance

About Primrose

About Primrose

Primrose is the place to be to Discover Everything Garden.

We were created in 2003 to become the UK's largest online-only garden centre. Thousands of plants, planters, awnings, garden furniture sets, water features and more line our digital shelves, and we're ready to fill your garden with comfort, quality, colour and style.

If you'd like to find out more, check out our 'About Us' page.

Reviews

Q&A

Get the latest news, offers and advice.

© 2026 Cercis Ltd. All rights reserved | Primrose is the trading name of Cercis Ltd (Registration number: 14521244)

Contact us
Terms
Privacy
Cookies

© 2026 Cercis Ltd. All rights reserved | Primrose is the trading name of Cercis Ltd (Registration number: 14521244)