{"product_id":"grandio-automatic-roof-vent-opener","title":"Grandio Automatic Roof Vent Opener","description":"\u003ch2\u003eAbout\u003c\/h2\u003e\n\u003cp\u003eThe Grandio Automatic Roof Vent Opener opens and closes a greenhouse roof vent automatically as temperatures rise and fall, with no electricity, no wiring, and no manual effort required. It's a simple ventilation upgrade for any Grandio greenhouse, giving plants consistent airflow and temperature control even when nobody is there.\u003c\/p\u003e\n\u003cp\u003eThe opener uses a wax (mineral) cylinder mechanism, the same proven technology used in greenhouse vent openers worldwide. As the greenhouse heats up, the mineral wax inside the cylinder expands, pushing a piston that gradually opens the roof vent. As temperatures cool, the wax contracts, and a spring closes the vent and resets the piston. The opening and closing is gradual, allowing just the right amount of airflow for cooling rather than snapping fully open or closed. No electricity, batteries, or wiring are needed; it is entirely self-contained and passive.\u003c\/p\u003e\n\u003cp\u003eThe opener works on all Grandio greenhouse roof vents, including the Ascent, Elite, Element, and Summit models. One opener is needed per roof vent.\u003c\/p\u003e\n\u003ch2\u003eFeatures\u003c\/h2\u003e\n\u003cp\u003eThe opener helps maintain optimal growing temperatures automatically, preventing heat stress and improving plant health. It delivers consistent, gentle ventilation exactly when needed and is easy to install on any Grandio roof vent.\u003c\/p\u003e\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eMechanism: Wax (mineral) cylinder, passive, non-electric\u003c\/li\u003e\n\u003cli\u003eCompatibility: All Grandio greenhouse roof vents (Ascent, Elite, Element, Summit)\u003c\/li\u003e\n\u003cli\u003eCoverage: One opener per roof vent\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Grandio","offers":[{"title":"Default Title","offer_id":49079115350235,"sku":"AUTO-ROOF","price":89.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0764\/6432\/4827\/files\/auto-opener-3.jpg?v=1786112415","url":"https:\/\/directhomesteadsupply.com\/products\/grandio-automatic-roof-vent-opener","provider":"Direct Homestead Supply","version":"1.0","type":"link"}