{"product_id":"automatic-greenhouse-vent-opener-temperature-activated-cylinder","title":"Automatic Greenhouse Vent Opener – Temperature-Activated Cylinder","description":"\n\u003ch2\u003eAutomatic Greenhouse Vent Opener with Replacement Cylinder\u003c\/h2\u003e\n\u003cp\u003eKeep your greenhouse at the perfect growing temperature — automatically. This smart, battery-free vent opener uses thermal temperature induction to open and close your greenhouse window as the temperature rises and falls, ensuring your plants always enjoy an optimal growing environment without any manual effort.\u003c\/p\u003e\n\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFully Automatic Operation:\u003c\/strong\u003e Opens and closes greenhouse vents automatically in response to temperature changes — no batteries, no electricity, no timers needed.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThermal Temperature Induction:\u003c\/strong\u003e The built-in heat-sensitive cylinder expands and contracts with temperature fluctuations, triggering smooth, reliable vent movement to prevent overheating or excess cold.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDurable Metal Construction:\u003c\/strong\u003e Made from quality iron\/metal material, this vent opener is wear-resistant and built for long-lasting, all-season performance.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eUniversal Fit:\u003c\/strong\u003e Lightweight and easy to install, it fits all standard greenhouses, garden sheds, cold frames, and polytunnels — no special tools required.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWide Application:\u003c\/strong\u003e Ideal for breeding greenhouses, flower greenhouses, film greenhouses, fruit greenhouses, and garden sheds.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eReplacement Cylinder Included:\u003c\/strong\u003e Comes with a replacement cylinder so you can keep your vent system running at peak efficiency for years.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Metal (Iron)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLength:\u003c\/strong\u003e 33.5 cm \/ 13.19 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePower Required:\u003c\/strong\u003e None (fully heat-powered)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eColor:\u003c\/strong\u003e Random (as supplied)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCountry of Origin:\u003c\/strong\u003e Made in China\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003ePackage Includes\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e1 × Automatic Greenhouse Window Vent Opener (Random Color)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cem\u003eNote: Please allow 1–2 cm measurement tolerance due to manual sizing. Color may vary.\u003c\/em\u003e\u003c\/p\u003e\n\n\u003cp\u003eLearn more: \u003ca href=\"https:\/\/www.osha.gov\/eye-face-protection\" target=\"_blank\" rel=\"noopener\"\u003eOSHA on eye and face protection\u003c\/a\u003e\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003ch4\u003eQ: Does the automatic greenhouse vent opener require batteries or a power supply?\u003c\/h4\u003e\n\u003cp\u003eA: No — this automatic greenhouse vent opener is entirely self-powered. It uses a heat-sensitive cylinder that expands and contracts with temperature changes, opening and closing the vent without any electricity, batteries, or wiring.\u003c\/p\u003e\n\u003ch4\u003eQ: What type of greenhouses is this vent opener compatible with?\u003c\/h4\u003e\n\u003cp\u003eA: This vent opener features a universal design suitable for most standard greenhouses, garden sheds, cold frames, polytunnels, breeding greenhouses, flower greenhouses, and fruit greenhouses. It is easy to assemble and disassemble for flexible use.\u003c\/p\u003e\n\u003ch4\u003eQ: At what temperature does the automatic vent opener activate?\u003c\/h4\u003e\n\u003cp\u003eA: The thermal cylinder is designed to respond to rising temperatures typical of greenhouse overheating scenarios. The exact activation temperature may vary slightly per unit; refer to the product packaging or manufacturer guidelines for precise temperature thresholds.\u003c\/p\u003e\n\u003ch4\u003eQ: Is the replacement cylinder easy to swap out?\u003c\/h4\u003e\n\u003cp\u003eA: Yes. The replacement cylinder is designed for straightforward swapping without special tools, helping you maintain consistent, reliable automatic ventilation over the long term.\u003c\/p\u003e\n\u003c!-- production-packaging-notice --\u003e\n\u003ch3\u003eProduction \u0026amp; Packaging Notice\u003c\/h3\u003e\n\u003cp\u003eTo maintain high stock availability and fast shipping times, our items are sourced from multiple verified manufacturing facilities. While the core quality, materials, and product specifications remain identical, you may notice slight variations in the packaging design, manufacturing origin, or the wording of the printed instructions.\u003c\/p\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\": \"https:\/\/schema.org\", \"@type\": \"FAQPage\", \"mainEntity\": [{\"@type\": \"Question\", \"name\": \"Does the automatic greenhouse vent opener require batteries or a power supply?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"No — this automatic greenhouse vent opener is entirely self-powered. 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The replacement cylinder is designed for straightforward swapping without special tools, helping you maintain consistent, reliable automatic ventilation over the long term.\"}}]}\u003c\/script\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\": \"https:\/\/schema.org\", \"@type\": \"BreadcrumbList\", \"itemListElement\": [{\"@type\": \"ListItem\", \"position\": 1, \"name\": \"Home\", \"item\": \"https:\/\/0dwbi8-fa.myshopify.com\/\"}, {\"@type\": \"ListItem\", \"position\": 2, \"name\": \"Home page\", \"item\": \"https:\/\/0dwbi8-fa.myshopify.com\/collections\/frontpage\"}, {\"@type\": \"ListItem\", \"position\": 3, \"name\": \"Automatic Greenhouse Vent Opener – Temperature-Activated Cylinder\", \"item\": \"https:\/\/0dwbi8-fa.myshopify.com\/products\/automatic-greenhouse-vent-opener-temperature-activated-cylinder\"}]}\u003c\/script\u003e","brand":"Quake","offers":[{"title":"B","offer_id":67583256363235,"sku":"14:193#B","price":112.77,"currency_code":"USD","in_stock":true},{"title":"A","offer_id":67583256396003,"sku":"14:771#A","price":46.27,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0820\/9439\/1523\/files\/S2aef469e15a84158af90c303aa5285881.webp?v=1790428390","url":"https:\/\/quakegoods.com\/products\/automatic-greenhouse-vent-opener-temperature-activated-cylinder","provider":"Quake","version":"1.0","type":"link"}