{"product_id":"alton-bayliss-xl-roof-vent-auto-opener","title":"Alton | Bayliss XL Roof Vent Auto Opener","description":"\u003cp\u003eThe \u003cstrong\u003eBayliss Clip-On Automatic Greenhouse Vent Opener\u003c\/strong\u003e is a simple, reliable solution for maintaining the ideal temperature inside your greenhouse, without constant monitoring. Designed for convenience and performance, this unit automatically opens and closes your roof vent based on temperature changes, helping protect your plants from overheating.\u003c\/p\u003e\n\u003cp\u003eBuilt to lift up to 12 lbs (5.5 kg), this auto vent opener provides a maximum opening of approximately 12 inches, allowing consistent airflow when your greenhouse needs it most. Its compact 11-inch design and satin anodized finish deliver both durability and a clean, professional look that complements most greenhouse frames.\u003c\/p\u003e\n\u003ch6\u003eKEY FEATURES\u003c\/h6\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eClip-on design:\u003c\/strong\u003e Quick, hassle-free installation on compatible greenhouse vents.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e12 lb lifting capacity:\u003c\/strong\u003e Supports vent loads up to 12 lbs (5.5 kg).\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e12-inch maximum opening:\u003c\/strong\u003e Helps release excess heat and improve airflow.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNo electricity required:\u003c\/strong\u003e Powered entirely by heat expansion.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSatin anodized finish:\u003c\/strong\u003e Durable, clean, and professional appearance.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch6\u003eSPECIFICATIONS\u003c\/h6\u003e\n\u003cdiv style=\"background-color: #f4f8f2; padding: 18px; border-radius: 12px; margin: 14px 0;\"\u003e\n\u003cp\u003e\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Automatic greenhouse vent opener\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eInstallation Style:\u003c\/strong\u003e Clip-on\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eMaximum Vent Opening:\u003c\/strong\u003e Approximately 12 inches\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eMaximum Lifting Capacity:\u003c\/strong\u003e 12 lbs (5.5 kg)\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eUnit Length:\u003c\/strong\u003e 11 inches\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFinish:\u003c\/strong\u003e Satin anodized\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003ePower Source:\u003c\/strong\u003e Heat expansion, no electricity or batteries required\u003c\/p\u003e\n\u003c\/div\u003e\n\u003ch6\u003eHOW IT WORKS\u003c\/h6\u003e\n\u003cp\u003eAutomatic greenhouse vent openers are one of the most effective ways to regulate temperature and protect your plants year-round. As temperatures rise, the opener gradually lifts the vent to release excess heat. When it cools down, the vent closes automatically, helping maintain a stable growing environment day and night.\u003c\/p\u003e\n\u003ch6\u003eWARRANTY\u003c\/h6\u003e\n\u003cp\u003eBacked by a 2-year guarantee for added confidence in performance and durability.\u003c\/p\u003e\n\u003ch6\u003eFREQUENTLY ASKED QUESTIONS\u003c\/h6\u003e\n\u003cp\u003e\u003cstrong\u003eHow does an automatic greenhouse vent opener work?\u003c\/strong\u003e\u003cbr\u003eIt uses a heat-sensitive piston that expands as temperatures rise, opening the vent. When temperatures drop, the piston contracts and closes the vent.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDo I need electricity or batteries?\u003c\/strong\u003e\u003cbr\u003eNo. This unit operates entirely on thermal expansion, so it requires no power source.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWill this fit my greenhouse?\u003c\/strong\u003e\u003cbr\u003eThe clip-on design fits many standard greenhouse roof vents, especially aluminum frames. Please confirm compatibility with your greenhouse model before ordering.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhy should I use an auto vent opener?\u003c\/strong\u003e\u003cbr\u003eIt helps prevent overheating, improves airflow, and keeps your greenhouse environment more stable, even when you’re not there to manage it manually.\u003c\/p\u003e","brand":"Alton","offers":[{"title":"Default Title","offer_id":47355183792277,"sku":"ALTBAXLAU","price":150.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0097\/9959\/8140\/files\/Bayliss-XL-roof-vent-opener-1.png?v=1778815608","url":"https:\/\/mygreenhousestore.com\/products\/alton-bayliss-xl-roof-vent-auto-opener","provider":"MyGreenhouseStore.com","version":"1.0","type":"link"}