Best Bayliss Greenhouse Window Openers of 2025

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Greenhouse Window Openers by Bayliss are a convenient and practical solution for regulating the temperature and humidity levels inside your greenhouse. These window openers are designed to automatically open and close the windows based on the temperature changes, ensuring that your plants receive the optimal amount of fresh air and ventilation they need to thrive. With their sturdy and durable construction, these window openers are easy to install and maintain, making them an essential addition to any greenhouse setup.
At a Glance: Our Top Picks
Top 6 Bayliss Greenhouse Window Openers
Bayliss Mk7 Autovent Greenhouse Roof Opener
The Bayliss Mk7 Autovent is a heavy-duty roof vent opener designed for greenhouses. It automatically opens roof vents as the temperature increases, ensuring your plants receive adequate ventilation. When the temperature drops, it conveniently closes the vents, protecting your plants from cold drafts. This product is simple to fit, with screws included for most aluminium or timber greenhouses, making installation hassle-free. Its white powder-coated finish adds a sleek look while providing durability against the elements.
Bayliss MK7 Triple Spring Window Opener for Greenhouses
The Bayliss MK7 Window Opener is perfect for side windows or exposed skylights, helping you maintain a comfortable environment in your greenhouse. It supports windows up to 92 cm x 61 cm and can handle a maximum weight of 12 kg, making it versatile for various setups. You can enjoy automatic opening when temperatures reach 12-25 degrees Celsius, allowing for optimal ventilation without manual effort. Additionally, it opens up to 30 cm, ensuring adequate airflow for your plants, which can lead to healthier growth.
Bayliss White MK7 Triple Spring Window Opener
The Bayliss MK7 Window Opener features a sleek white powder-coated finish, making it an attractive addition to your greenhouse. It is designed to handle top hung aluminium or timber framed vents up to 3ft x 2ft, providing you with flexibility in your greenhouse setup. This heavy-duty autovent is perfect for lightweight polycarbonate greenhouse vents, especially in exposed locations, as it helps reduce wind flutter and potential damage. Additionally, the strong return springs make the MK7 ideal for use on side windows and roof vents, ensuring reliable performance.
Bayliss Green MK7 Triple Spring Opener
The Bayliss MK7 Opener features a sleek green powder-coated finish, making it an attractive addition to your greenhouse. This autovent is designed for top hung aluminium or timber framed vents up to 3ft x 2ft, providing versatility for various setups. It is particularly useful for lightweight polycarbonate vents, as it helps to reduce wind flutter and potential damage in exposed locations. Additionally, the strong return springs make the MK7 ideal for both side windows and roof vents, ensuring reliable operation whenever you need it.
Bayliss XL Autovent Greenhouse Window Opener
The Bayliss XL Autovent is an automatic greenhouse window opener designed for convenience. It operates without electricity, using solar power to open and close your greenhouse windows automatically, ensuring optimal ventilation for your plants. Made from durable, corrosion-resistant materials, it guarantees long-lasting performance. With a lifting force of over 6kg and a maximum opening range of 30cm, this opener helps you maintain the perfect climate in your greenhouse, allowing you to focus more on gardening and less on manual tasks.
Bayliss XL Automatic Window Opener
The Bayliss XL Window Opener is designed for effortless installation, fitting easily into wood and clamping onto aluminium greenhouses without the need for drilling. This product comes with full fitting instructions, ensuring that you can set it up quickly and efficiently. You will appreciate the simplicity of its adjustment, allowing you to modify its settings with just one easy tweak. Being solar powered and non-electric, it offers an eco-friendly solution for managing your greenhouse ventilation.
During our Bayliss greenhouse window opener research, we found 6 Bayliss greenhouse window opener products and shortlisted 6 quality products. We collected and analyzed 26,769 customer reviews through our big data system to write the Bayliss greenhouse window openers list. We found that most customers choose Bayliss greenhouse window openers with an average price of £33.02.
The Bayliss greenhouse window openers are available for purchase. The top 6 picks range in price from a low of £22.00 to a high of £55.00, find the one that fits your budget. The seller of top 1 product has received honest feedback from 131 consumers with an average rating of 4.9.

Toby Butcher is a Horticulturist, and he earned his title as a Master Gardener in 2016. Toby has acquired a 25-year experience as a home gardener planting, designing, grooming vegetables and flowers. He is the leader of a plant group in Durham. Toby owns a blog where he publishes articles on growing and growing your flowers at home, in a vase, or in a garden.