{"product_id":"grandio-auto-roof-vent-opener","title":"Auto Roof Vent Opener","description":"\u003cp dir=\"auto\"\u003eWorks on all Grandio Greenhouse roof vents.\u003c\/p\u003e\n\u003cp dir=\"auto\"\u003eThis automatic vent opener gives you hands-free temperature control by automatically opening your roof vent when the greenhouse warms up and gently closing it as temperatures drop. No electricity or manual adjustments needed — just reliable, set-it-and-forget-it ventilation.\u003c\/p\u003e\n\u003cp dir=\"auto\"\u003e\u003cstrong\u003eHow it works:\u003c\/strong\u003e The opener contains a metal cylinder filled with a special mineral that expands when heated, pushing a piston to open the vent. As the temperature cools, the mineral contracts and a built-in spring smoothly closes the vent. This gradual operation provides exactly the right amount of airflow to prevent overheating while protecting your plants from sudden temperature swings.\u003c\/p\u003e\n\u003cp dir=\"auto\"\u003e\u003cstrong\u003eKey Benefits:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul dir=\"auto\"\u003e\n\u003cli\u003eMaintains optimal growing temperatures automatically\u003c\/li\u003e\n\u003cli\u003ePrevents heat stress and improves plant health\u003c\/li\u003e\n\u003cli\u003eDelivers consistent, gentle ventilation exactly when needed\u003c\/li\u003e\n\u003cli\u003eEasy to install on any Grandio roof vent\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp dir=\"auto\"\u003ePerfect for creating a stable, healthy environment inside your greenhouse all season long.\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003e\u003cbr\u003e\u003cstrong\u003e\u003ca href=\"\/\/epicgreenhouses.com\/manuals\/grandio\/Accessories\/GRANDIO_Roof_Vent_Opener.pdf\" rel=\"noopener\" target=\"_blank\"\u003eProduct Manual (PDF)\u003c\/a\u003e\u003c\/strong\u003e\u003c\/p\u003e","brand":"Grandio Greenhouses","offers":[{"title":"Default Title","offer_id":51883778474296,"sku":"AUTO-ROOF","price":89.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0989\/3770\/0664\/files\/auto-opener-3.jpg?v=1775763807","url":"https:\/\/grandiogreenhouses.com\/products\/grandio-auto-roof-vent-opener","provider":"Grandio Greenhouse","version":"1.0","type":"link"}