£ 19.99
Automatic Greenhouse Window Opener, Vent Opener 7kg, Accessories Solar powered, opens from 15C, fully open by 38C, 45 cm lift, double spring, replaceable wax cylinder, Designed in the UK
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Opens and Closes Itself, No Power Needed: An automatic greenhouse vent opener with a sealed wax cylinder that expands as the air warms and contracts as it cools, lifting the vent on hot mornings and closing it at night, no electricity, no batteries. Opens From 15C, Fully Open by 38C, and You Can Tune It: The greenhouse vent lifts from around 15 degrees, is fully open at 45 cm by 38 and closes 5 to 10 degrees lower, and the opening point fine tunes with the threaded rod and locking pin. Sealed Cylinder, Stainless Steel Rod: The failure gardeners write about most is a cylinder that leaks wax onto the greenhouse floor. This one is fully sealed, its rod is smooth stainless steel to protect the seal, and it is rated for 10,000 cycles. Double Spring Build, Lifts Up to 7 kg: Two return springs share the load, so this greenhouse automatic window opener lifts aluminium roof vents and side hung windows, and as the air cools it eases the vent partly shut and sets it down with no slam. Fits Glass, Polycarbonate, Aluminium and Timber: Tested by the factory on aluminium, glass, polycarbonate, galvanised steel and timber greenhouses, top hung roof vents and side hung windows, with brackets, screws and a fitting leaflet in the box. Replaceable Cylinder, Off in Seconds Before a Storm: The cylinder lifts out by hand, so you take it off before high winds or over winter and refit it in spring, and if it ever tires a spare cylinder fits the same frame, so a worn part costs a spare. Designed in the UK, Fitted the Factory's Way: This automatic window opener works to around minus 5 degrees and fits as the factory fits it: chill the cylinder in the fridge so the pin retracts, then fit it with the vent closed.
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Opens and Closes Itself, No Power Needed: An automatic greenhouse vent opener with a sealed wax cylinder that expands as the air warms and contracts as it cools, lifting the vent on hot mornings and closing it at night, no electricity, no batteries. Opens From 15C, Fully Open by 38C, and You Can Tune It: The greenhouse vent lifts from around 15 degrees, is fully open at 45 cm by 38 and closes 5 to 10 degrees lower, and the opening point fine tunes with the threaded rod and locking pin. Sealed Cylinder, Stainless Steel Rod: The failure gardeners write about most is a cylinder that leaks wax onto the greenhouse floor. This one is fully sealed, its rod is smooth stainless steel to protect the seal, and it is rated for 10,000 cycles. Double Spring Build, Lifts Up to 7 kg: Two return springs share the load, so this greenhouse automatic window opener lifts aluminium roof vents and side hung windows, and as the air cools it eases the vent partly shut and sets it down with no slam. Fits Glass, Polycarbonate, Aluminium and Timber: Tested by the factory on aluminium, glass, polycarbonate, galvanised steel and timber greenhouses, top hung roof vents and side hung windows, with brackets, screws and a fitting leaflet in the box. Replaceable Cylinder, Off in Seconds Before a Storm: The cylinder lifts out by hand, so you take it off before high winds or over winter and refit it in spring, and if it ever tires a spare cylinder fits the same frame, so a worn part costs a spare. Designed in the UK, Fitted the Factory's Way: This automatic window opener works to around minus 5 degrees and fits as the factory fits it: chill the cylinder in the fridge so the pin retracts, then fit it with the vent closed.
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