{"product_id":"solar-powered-greenhouse-auto-vent-opener","title":"Solar Powered Greenhouse Auto Vent Opener","description":"\u003cp\u003eKeep your greenhouse at the right temperature without lifting a finger. This solar powered auto vent opener senses the heat inside your greenhouse and gently opens the roof vent as things warm up, then closes it again as temperatures drop overnight. No power, batteries, or wiring required, just simple science doing the work for you.\u003c\/p\u003e\n\u003cp\u003eInside the opener is a sealed metal cylinder filled with a heat-sensitive mineral. As the greenhouse warms, the mineral expands and pushes a piston that gradually opens the vent. When it cools, the mineral contracts and a spring resets the piston, easing the vent shut. Because the movement is gradual, your plants get just the right amount of airflow, not a sudden blast of cold air.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFeatures -\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eFully automatic, temperature-driven operation, no power needed\u003c\/li\u003e\n\u003cli\u003eStarts opening between 16-23°C\u003c\/li\u003e\n\u003cli\u003eFully open at 35°C and above\u003c\/li\u003e\n\u003cli\u003eAdjustable opening temperature to suit your climate\u003c\/li\u003e\n\u003cli\u003eGradual open\/close action for gentle, even ventilation\u003c\/li\u003e\n\u003cli\u003eComes with installation instructions\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eSpecifications -\u003c\/strong\u003e\u003cbr\u003eFully open distance: 45cm\u003cbr\u003eMaximum open weight: 7kg\u003cbr\u003eInstallation: Drilling required\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eGreat for -\u003c\/strong\u003e\u003cbr\u003eOur Steelmates Polycarbonate greenhouse range, keeping vents open on hot days and closed on cold nights so your plants stay happy while you're not around to manage it yourself.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003ePlease note -\u003c\/strong\u003e\u003cbr\u003eThis auto opener is designed to suit our Steelmates polycarbonate greenhouses. Please check your greenhouse model before purchasing to make sure the opener is suitable for your setup.\u003c\/p\u003e","brand":"Steelmates","offers":[{"title":"Default Title","offer_id":50593093189880,"sku":null,"price":75.0,"currency_code":"NZD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0657\/2851\/2248\/files\/greenhouse-auto-vent-opener-32751.jpg?v=1790049015","url":"https:\/\/urbanbackyards.nz\/products\/solar-powered-greenhouse-auto-vent-opener","provider":"Urban Backyards","version":"1.0","type":"link"}