Give your greenhouse the ventilation it needs with our automatic louvre vent opener. It uses the p...Give your greenhouse the ventilation it needs with our automatic louvre vent opener. It uses the power of the sun to automatically open and close based on the temperature you set. It works by using a wax cylinder which expands in the heat. Comes complete with step by step instructions. Fits most standard greenhouse louvre vents. Opens windows from 17-25 degrees celcius. The unit has an opening force of 12.5kg. and a max window weight up to 25kg Made from aluminium zinc coated steel. The mechanism itself without the cylinder is approx. L:14cm x H:5cm x D:4.5cm. This greenhouse vent opener adjusts airflow based on temperature. As heat builds, the vent opens to release warm air and closes again as temperatures drop. The opener uses a wax filled cylinder that expands with heat. This movement drives the mechanism to open vents between 17 and 25 degrees celsius. By improving ventilation, this unit helps regulate temperature and humidity levels. This supports plant growth and reduces excess heat build up inside the greenhouse. Designed to fit most standard greenhouse louvre vents. It can be installed onto existing vent panels to provide automatic operation. The mechanism provides an opening force of 12.5kg and supports vent weights up to 25kg. This allows reliable movement of standard greenhouse vent panels. Follow the included instructions to attach the unit to your louvre vent. Ensure correct positioning so the mechanism can move freely as temperatures change. Made from aluminium and zinc coated steel. The construction supports regular use in greenhouse environments. Mechanism size length 14cm height 5cm depth 4.5cm.
Best current price£24.99from Gardening Naturally UK
This automatic louvre vent opener from Gardening Naturally is designed for greenhouse owners seeking effortless temperature and humidity regulation. Its key benefit is the automated opening and closing of louvre vents using solar energy, ensuring optimal growing conditions without manual intervention. A potential caveat is its reliance on temperature alone for operation, meaning it won't respond to other environmental factors. The opener features a wax-filled cylinder mechanism that expands with heat to open vents between 17-25°C, constructed from durable aluminium and zinc-coated steel.
All features
Colour
Silver
Model Part Number
GLV
Brand
Gardening Naturally
Extended Product Information
FAQs
How does the vent opener know when to open and close?
It uses a special wax-filled cylinder. As the greenhouse heats up, the wax expands, pushing a piston that opens the vent. When the temperature drops, the wax cools and contracts, allowing a spring to pull the vent closed.
What temperature range does it operate in?
The vent opener is designed to open the louvre vents when the temperature rises between 17 and 25 degrees Celsius. It will begin to open as it gets hotter than 17°C and will be fully open at higher temperatures within the range, then close as it cools back down below 25°C.
Does it require electricity?
No, the opener is entirely powered by the sun's heat. It does not require any electrical connection or batteries.
Will this fit any greenhouse vent?
It is designed to fit most standard greenhouse louvre vents. However, it's recommended to measure your vent and compare it with the mechanism's dimensions (L:14cm x H:5cm x D:4.5cm) and consider the opening force and weight capacity.
What is the maximum weight of a vent panel it can operate?
The opener can support a maximum window weight of up to 25kg and provides an opening force of 12.5kg, which is suitable for most standard louvre vents.
How do I clean and maintain the vent opener?
The unit is made from durable aluminium and zinc-coated steel. Periodically wipe it down with a damp cloth and ensure the moving parts are free from debris. No special lubrication is typically needed.
What happens if the temperature drops below freezing?
The mechanism will contract and the vent will close. If ice forms, do not force the vent open, as this could damage the mechanism.
Troubleshooting
Vent not opening when it's hot.
Ensure the wax cylinder is properly seated and the mechanism is not obstructed. Check that the temperature is above the activation threshold (17°C). Verify the vent panel's weight does not exceed the 25kg limit.
Vent not closing when it's cool.
Confirm the temperature is below the closing threshold (25°C). Check that the mechanism is not sticking and that the closing spring has sufficient tension. Ensure no debris is preventing the vent from closing fully.
Opener seems stiff or difficult to move.
Inspect the mechanism for any signs of damage or dirt buildup. Ensure the vent panel itself is not warped or binding in its frame. The unit requires a clear path for movement.
Opener broke or stopped functioning.
Check the warranty information. If the unit is damaged, it may need replacement. Inspect for signs of excessive force or wear and tear.
Pros and Cons
Pros
Automates greenhouse ventilation, saving time and effort.
Maintains optimal growing conditions by regulating temperature and humidity.
Durable, weather-resistant construction for long-term use.
Easy to install on most standard louvre vents.
No electricity required, operating solely on solar heat.
Cons
Operation is solely based on temperature, not other environmental factors.
Limited opening range (17-25°C) might not suit all plants or climates.
Maximum vent weight capacity (25kg) may not be sufficient for very heavy vents.
Requires manual adjustment or removal if specific manual ventilation is needed outside the operating temperature range.
Setup, Compatibility & Care Instructions
Setup:
Carefully read the provided step-by-step instructions.
Identify the mounting points on your existing louvre vent panel and the vent opener.
Attach the opener mechanism to the vent panel, ensuring it is securely fastened.
Ensure the mechanism has a clear range of motion without obstructions.
Position the unit so that the cylinder can freely expand and contract.
Compatibility:
Designed to fit most standard greenhouse louvre vents.
The mechanism can be adapted to existing vent panels.
Care:
The unit is constructed from aluminium and zinc-coated steel, offering good corrosion resistance.
Periodically check that the mechanism moves freely and is free of debris.
No lubrication is typically required for the wax cylinder mechanism.
In extreme cold, ensure the mechanism is not forced closed if frozen.