{"product_id":"alton-thermofor-louvered-window-opener-piston-replacement","title":"Alton | Thermofor Louver Window Opener Piston Replacement","description":"\u003cp\u003eThe Thermofor Louver Vent Replacement Cylinder is designed to restore smooth, automatic operation to your greenhouse louver vent opener. Compatible with Thermofor, Robinsons, and Alton branded louver openers, this replacement cylinder helps maintain proper airflow and temperature control without manual adjustment.\u003c\/p\u003e\n\u003cp\u003eInside the cylinder is a heat-sensitive wax core that expands as temperatures rise and contracts as they cool. This natural movement powers the opening and closing of your louver vents, improving ventilation and protecting your plants from overheating.\u003c\/p\u003e\n\u003ch6\u003eKEY FEATURES\u003c\/h6\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eWide compatibility:\u003c\/strong\u003e Fits Thermofor, Robinsons, and Alton louver vent openers.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRestores automatic ventilation:\u003c\/strong\u003e Keeps airflow consistent and responsive to temperature changes.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHeat-powered operation:\u003c\/strong\u003e No electricity or batteries required.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eReplacement cylinder only:\u003c\/strong\u003e No fittings or mounting hardware included.\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 Replacement cylinder\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCOMPATIBILITY:\u003c\/strong\u003e Thermofor, Robinsons, and Alton louver vent openers\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eOVERALL LENGTH:\u003c\/strong\u003e 7 inches\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eMETRIC LENGTH:\u003c\/strong\u003e 170 mm\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eINCLUDED:\u003c\/strong\u003e Cylinder only (no fittings)\u003c\/p\u003e\n\u003c\/div\u003e\n\u003ch6\u003eHOW IT WORKS\u003c\/h6\u003e\n\u003cp\u003eThe cylinder uses a wax-filled core that reacts to temperature changes. As the greenhouse warms up, the wax expands and pushes the piston to open the louver vent. When temperatures drop, the wax contracts, allowing the vent to close. This automatic process helps maintain a stable growing environment throughout the day.\u003c\/p\u003e\n\u003ch6\u003eMAINTENANCE AND CARE\u003c\/h6\u003e\n\u003cp\u003eKeep the cylinder clean and free from debris to ensure smooth operation. Periodically inspect your louver opener to maintain proper alignment and performance.\u003c\/p\u003e\n\u003ch6\u003eFREQUENTLY ASKED QUESTIONS\u003c\/h6\u003e\n\u003cp\u003e\u003cstrong\u003eWhat does a louver vent opener cylinder do?\u003c\/strong\u003e\u003cbr\u003eIt controls the opening and closing of your louver vents using heat expansion, helping regulate airflow and temperature inside your greenhouse.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDo I need electricity or batteries?\u003c\/strong\u003e\u003cbr\u003eNo. The cylinder operates entirely on heat expansion, so it requires no power source.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWill this fit my greenhouse vent opener?\u003c\/strong\u003e\u003cbr\u003eThis cylinder is compatible with Thermofor, Robinsons, and Alton louver vent openers. Always confirm your model before purchasing.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhen should I replace the cylinder?\u003c\/strong\u003e\u003cbr\u003eIf your louver vent no longer opens or responds slowly to temperature changes, replacing the cylinder can restore proper function.\u003c\/p\u003e","brand":"Alton","offers":[{"title":"Default Title","offer_id":47355269349525,"sku":"ALTTHCY0002L","price":45.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0097\/9959\/8140\/files\/thermofor-piston-for-louver-opener.jpg?v=1778819579","url":"https:\/\/mygreenhousestore.com\/products\/alton-thermofor-louvered-window-opener-piston-replacement","provider":"MyGreenhouseStore.com","version":"1.0","type":"link"}